model 101r/nr - frank's hospital workshop · the model 101r/nr portable patient monitor is a...
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Copyright © 1999 by Ivy Biomedical Systems, Inc., Branford, Connecticut. All rights reserved. No part of this manual may be reproduced without the permission of Ivy Biomedical Systems, Inc.
101R/NR0999 2409-00-20 REV 00
Table of Contents
Table of Contents WARRANTY .......................................................................................................................................................iv INTRODUCTION ................................................................................................................................................1 SAFETY ................................................................................................................................................................2 Electrical................................................................................................................................................................2 Explosion ...............................................................................................................................................................2 Patient Connections..............................................................................................................................................2 Pacemakers ...........................................................................................................................................................2 Electrosurgery.......................................................................................................................................................3 Defibrillation Protection ......................................................................................................................................3 EMC.......................................................................................................................................................................3 Description of Labels............................................................................................................................................3 MONITOR DESCRIPTION ...............................................................................................................................4 Specifications.........................................................................................................................................................4 Control and Indicatiors........................................................................................................................................7
Basic Keys................................................................................................................................................7 Programmable Keys .................................................................................................................................8 Menu Structure.........................................................................................................................................9 Display ...................................................................................................................................................10 Rear Panel ..............................................................................................................................................10
MONITOR SETUP ............................................................................................................................................12 Change Mains Voltage .......................................................................................................................................12 TRIGGER OUTPUT..........................................................................................................................................13 The Trigger Pulse ...............................................................................................................................................13 Trigger-Spot Display ..........................................................................................................................................13 ECG MONITORING.........................................................................................................................................14 Safety Considerations.........................................................................................................................................14 Patient Connections............................................................................................................................................15 ECG Waveform Amplitude (Size).....................................................................................................................15 Lead Selection .....................................................................................................................................................16 ECG Filter...........................................................................................................................................................16 Alarm Limits.......................................................................................................................................................17 RECORDER OPERATION ..............................................................................................................................18 Changing Paper ..................................................................................................................................................18 Recorder Menus..................................................................................................................................................19 Recorder Modes..................................................................................................................................................20 ALARM MESSAGES ........................................................................................................................................22
Model 101R/NR Service Manual i
Table of Contents
MONITOR TESTING .......................................................................................................................................23 CLEANING ........................................................................................................................................................24 Monitor................................................................................................................................................................24 Patient Cables .....................................................................................................................................................24 ACCESSORIES..................................................................................................................................................25 Disposal................................................................................................................................................................25 THEORY OF OPERATION .............................................................................................................................26 General ................................................................................................................................................................26 High Voltage Power Supply and Video Amplifier...........................................................................................26 Purpose of the High Voltage Power Supply...........................................................................................26 CRT Theory ...........................................................................................................................................26 Raster and Stroke Written Displays .......................................................................................................26 Timer Circuit ..........................................................................................................................................27 High Voltage Module.............................................................................................................................27 Feedback Amplifier................................................................................................................................27 Adjustment Circuit .................................................................................................................................28 Cathode Generation Circuit....................................................................................................................28 Low Voltage Power Supplies .............................................................................................................................29 DC Voltages ...........................................................................................................................................29 Isolated DC Voltages .............................................................................................................................29 ECG Input...........................................................................................................................................................29 Isolated Amplifiers.................................................................................................................................29 Lead Off Sensor .....................................................................................................................................29 Shield Drive ...........................................................................................................................................29 Lead Selection........................................................................................................................................29 Test Signal Generation ...........................................................................................................................30 ECG Waveform ..................................................................................................................................................30 ECF Filter...............................................................................................................................................30 X1000 Output.........................................................................................................................................30 ECG Gain ...............................................................................................................................................30 A/D Converter ........................................................................................................................................30 Cardiotach...........................................................................................................................................................31 Peak Detector .........................................................................................................................................31 Rate Computation...................................................................................................................................32 Alarm Generation...................................................................................................................................32 CRT Signals ........................................................................................................................................................32 Vertical Deflection .................................................................................................................................32 Horizontal Deflection.............................................................................................................................32 Horizontal Correction.............................................................................................................................32 Unblanking.............................................................................................................................................33 Audio Circuits.....................................................................................................................................................33 ECG Audio.............................................................................................................................................33 Alert Audio.............................................................................................................................................33 Digital Circuitry..................................................................................................................................................34
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Table of Contents
TESTING AND TROUBLESHOOTING.........................................................................................................35 ECT Test .............................................................................................................................................................35 Equipment Required...............................................................................................................................35 Initial Settings for the Test .....................................................................................................................35 ECT Test Procedure ...............................................................................................................................35 Troubleshooting..................................................................................................................................................37 General Checks ......................................................................................................................................37 CRT Display...........................................................................................................................................37 Mother Board .........................................................................................................................................37 Troubleshooting Table ...........................................................................................................................38 Block Diagram ....................................................................................................................................................39 Voltage Measurements.......................................................................................................................................40 Key Signals ..........................................................................................................................................................41 Adjustment Procedure .......................................................................................................................................43 Equipment Required...............................................................................................................................43 ECG Signal.............................................................................................................................................43 50/60 Hz Notch Filter.............................................................................................................................43 Peak Detector .........................................................................................................................................43 CRT Display...........................................................................................................................................44 ASSEMBLY AND DISASSEMBLY.................................................................................................................46 Removing Cover .................................................................................................................................................46 Removing the High Voltage Power Supply ......................................................................................................46 Removing the Yoke.............................................................................................................................................47 Removing the CRT.............................................................................................................................................47 Replacing the Main Power LED........................................................................................................................47 Removing the Recorder Assembly ....................................................................................................................47 Removing the Mother Board.............................................................................................................................48 Replacing the Touch Panel ................................................................................................................................48 PURCHASING INFORMATION.....................................................................................................................49 Part List...............................................................................................................................................................49 Terms and Conditions........................................................................................................................................49 BOARD LAYOUT DIAGRAMS .......................................................................................................................A SCHEMATICS DIAGRAMS ............................................................................................................................. B
Model 101R/NR Service Manual iii
WARRANTY
WARRANTY All products warranted to be free from defects in material and workmanship and to operate within published specifications, under normal use, for a period of two years from date of original shipment. If an examination discloses such products or component parts to have been defective, then our obligation is limited to repair or replacement (at our option). Fuses and batteries are not covered under this warranty. During the first year of service, there is no charge for parts or labor. In the second year of service, the customer is charged for labor only.
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INTRODUCTION
INTRODUCTION This manual is to provide information on the correct use of the Model 101R/NR monitor. It is up to the user to ensure that any applicable regulations respecting the installation and operation of the monitor are observed. Manufacturer's Responsibility The manufacturer of this equipment is responsible for the effects on safety, reliability, and performance of the equipment only if: • assembly operations, extensions, re-adjustments, or repairs are carried out by persons authorized by the
manufacturer • the electrical installation complies with all applicable regulations • the equipment is used in accordance with the instructions in this manual. Incorrect operation or failure of the user to maintain the monitor in accordance with proper maintenance procedures relieves the manufacturer or his agent from all responsibility for consequent non-compliance, damage, or injury. For technical and service information, please refer to the Model 101R/NR Service Manual. READ THE ENTIRE SAFETY INFORMATION SECTION BEFORE YOU OPERATE THE MONITOR.
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SAFETY
SAFETY
Electrical This product is intended to be operated from a mains power source of nominally 100, 120, 220 and 230 V ~. The correct mains operating voltage is specified on the monitor's rear panel. To prevent electrical hazards to all personnel, this monitor must be properly grounded. The power cable supplied with this equipment provides for this protection. Do not attempt to defeat this protection by modifying the cable or by using ungrounded adapters.
WARNING: Electric shock hazard! Do not remove covers or panels. Refer service to qualified service personnel. WARNING: To avoid electrical shock, disconnect the monitor from its power source before changing fuses. Replace only with same type and rating of fuse. WARNING: Do not clean monitor while it is on and/or plugged in. WARNING: This unit uses a common isolation path for ECG leads. Do not connect any non-isolated accessories to the ECG input connected to a patient, as this may compromise the safety of the unit. When attached to other devices, insure that the total chassis leakage currents of all units do not exceed 300µA. Explosion DANGER: Explosion hazard! Do not use this equipment in the presence of flammable anesthetics. Patient Connections Patient connections are electrically isolated Type CF ⎯ ♥⎯. For all connections use insulated probes. Don't let patient connections contact other conductive parts, including earth. See instructions for patient connections in this manual. Carefully route patient cables to reduce the possibility of patient entanglement or strangulation. Leakage current is limited internally by this monitor to less than 10 µA. However, always consider additional leakage current that can be caused by other equipment used on the patient at the same time as this monitor. To ensure that the leakage current protection remains within the specifications, use only the patient cables specified in the patient connections instructions in this manual. Pacemakers: Rate meters might continue to count the pacemaker rate during occurrences of cardiac arrest or some arrhythmias. Do not rely on rate meter alarms. Keep pacemaker patients under close surveillance.
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SAFETY
Electrosurgery Avoid electrosurgery burns at monitoring sites by ensuring proper connection of the electrosurgery return circuit. If improperly connected, some electrosurgery units might allow energy to return through the electrodes. Defibrillation Protection This equipment is protected against 360 J discharge and electrosurgery potentials. The monitor is internally protected to limit current through the electrodes to prevent injury to the patient and damage to the equipment as long as the defibrillator is used in conformance with the manufacturer's instructions. EMC This equipment has been certified to be protected to emissions and immunity according to IEC-601-1-2. Description of Warning Labels Attention, consult ACCOMPANYING DOCUMENTS before attempting to change
power supply selection or carry out interconnections. Equipment connected should comply with IEC-601-1 or IEC-950 with configuration to IEC-601-1-1.
Equipotential earth connector adjacent to this symbol.
Protective earth (ground) adjacent to this symbol. Internal connection on mains connector/filter.
⎯♥⎯ Type CF equipment, Defibrillator proof. _______ Fuse type/rating.
= OFF, = ON.
∼ Alternate Current (AC) Output signal.
Model 10
DANGER HIGH
VOLTAGE
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MONITOR DESCRIPTION
MONITOR DESCRIPTION The Model 101R/NR Portable Patient Monitor is a dual trace monitor for ECG and heart rate, which produces an output pulse corresponding in time to the R-wave. The monitor is intended primarily for use in timed imaging studies, TMR/PMR and any application requiring precision R-wave synchronization. Specifications ECG Lead Selection: LI, LII, LIII menu selectable. Patient Cable: 6-Pin AAMI Standard connector Isolation: Isolated from ground related circuits by >4 kV rms, 5.5 kV peak CMRR: ≥90 dB with patient cable and 51 kΩ/47 nF imbalance Input Impedance: ≥20 MΩ at 10 Hz with patient cable Frequency Response CRT: Filtered: 0.5 to 25 Hz Unfiltered: 0.5 to 45 Hz Frequency Response X1000 output: Filtered: 0.5 to 25 Hz Unfiltered: 0.2 to 100 Hz Input Bias Current: Any lead configuration <200 nA dc maximum Electrode Offset Potential: ±0.5 V DC Noise: <20 µV peak-to-peak, referred to the input with all leads connected through 51 kΩ/47 nF to ground Defibrillator Protection: Protected against 360 J discharge and electrosurgery potentials Leakage Current: <10 µA at normal condition Electrosurgical Interference Protection: Standard Notch Filter: 50/60 Hz (automatic).
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MONITOR DESCRIPTION
Cardiotach Range: 15 to 255 bpm Accuracy: ±1% Resolution: 1 bpm Sensitivity: 300 µV peak Pace Pulse Rejection Width: 0.1 to 2 ms at 2 to 700 mV Tall T Wave Rejection: Rejects T waves ≤R wave Alarms High Rate: 100 to 250 bpm in 5 bpm increments Low Rate: 30 to 100 bpm in 5 bpm increments Asystole: R to R interval >6 seconds Lead Off: Detached lead or offset potential >0.5 V Test Mode ECG: 1 mV/100 ms @ 70 bpm Display Type: CRT, P31 phosphor, non-fade Trace: Dual, Fixed (moving bar), single trace normal operation. Dual trace in “freeze” mode. Screen Size: 14.25 cm by 10.2 cm, 17.5 cm diagonal Sweep Speed: 25, 50 mm/s Mechanical Size: Height: 6.25 in. (16 cm) Width: 12.5 in. (31 cm) Depth: 16.0 in. (40 cm) Weight: < 20 lbs (9 kg)
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MONITOR DESCRIPTION
Trigger Output Phase Delay fromElectrode Leads to Trigger Output: < 3 ms R to R Trigger Accuracy: ±200 µs typical @ 1 mV input Sensitivity and Threshold Adjustment: Fully Automatic Optional Trigger Delay: User adjustable from 0 to 700 ms in 5 ms increments. Environmental Operating Temperature Range: 5°C to 45°C Storage Temperature Range: -25°C to 60°C Relative Humidity: 0-90% non-condensing Power Requirements Voltage Input: 100, 120, 220, 230, V ~, 50/60 Hz; +10% - 15% (to change mains operating voltage see text on Monitor Setup). Maximum ac Power Consumption: 85 VA Safety Unit meets or exceeds the specifications for the AAMI Cardiac Monitor Standard. Units meet UL544, CSA, and CE-MDD 93/42/ECC requirements. ISO-9001 Approval # 98-1044.
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MONITOR DESCRIPTION
Controls and Indicators Basic Keys MAINS POWER SWITCH: A switch to control ac power input to the monitor. The | position is on, O is off.
Puts monitor into setup mode and causes setup menu to be displayed on the right portion of the screen. The monitor returns to normal mode after pressing MENU again or if no keys are pressed for 20 seconds.
Disables the audible and visual alarms for a two-minute period to allow the operator perform procedures that would otherwise set off the alarms. This avoids the problem of turning off the alarms and forgetting to turn them back on. Press this key again to return the alarms to normal before the two minutes have expired.
Generates a 1 mV pulse at 70 bpm that is displayed on the ECG trace and sent to the X1000 output on the rear panel while the switch is depressed. This is used to ensure that the monitor is functioning correctly.
Turns the alarm audio on and off. When off, the ALARMS OFF message is displayed on the left side of the screen.
Activates recorder. Push to start, push again to stop. (101R)
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MONITOR DESCRIPTION
Basic Keys
ECG Patient Cable input
Power Switch Programmable Keys
Programmable Keys Each of the following keys, to the right of the CRT display, has a normal function, printed on the key, and two menu functions, displayed on the screen in the setup modes. The additional functions are accessed by pressing the MENU key once. Return to normal function by pressing MENU key again.
Selects the speed at which the ECG trace moves across the screen.
Stops the movement of the ECG waveform on the display for closer evaluation and displays the waveform as a second trace below the actual trace. Press FREEZE again to resume movement.
Resets the audible and visual indicators for an alarm that has been activated.
Enables the Trigger-Spot feature, which highlights the point in the ECG waveform when the trigger output pulse occurs.
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MONITOR DESCRIPTION
Display HEART RATE: Displayed in beats per minute (bpm) on the upper left part of the screen. SETUP: Selections made in the menu setup modes (alarm limits, lead selection, and filter on/off) are displayed in small characters at the upper right corner. ECG: Trace is displayed across the screen moving from right to left. ALARMS: The following alarm indications are displayed in reverse video. Alarm indications appear on the upper right portion of the screen and flash once per second except ALARMS OFF, which is displayed on the upper left
portion of the screen and is displayed as .
: The audible alarms have been turned off. LEAD OFF: A lead has become disconnected. This alarm cannot be reset with the ALERT RESET key. HR HIGH: The high heart rate limit has been exceeded for four seconds. HR LOW: The low heart rate limit has been exceeded for four seconds. ASYSTOLE: The interval between heartbeats has exceeded six seconds. Rear Panel The following are located on the rear panel. POWER INPUT: A receptacle for a standard ac power cord. When the monitor is connected to another piece of equipment through this rear panel connector, always make sure that each piece of connected equipment has its own separate ground connection. Do not attempt to connect cables to these connectors without contacting your Biomedical Engineering Department. This is to ensure the connection complies with leakage current requirements of one of the following applicable standards: UL 544, CSA 22.2 No. 125 or IEC 601-1. The maximum non-destructive voltage that may be applied to these connectors is 5V. TRIGGER OUTPUT: A BNC type connector for the output of the trigger pulse indicating the timing of the peak of the R-wave. The output can be delayed from the peak of the R-wave through user controls. QRS VOLUME CONTROL: A switch to control the QRS beep audio volume. Alarm audio is not affected. PEQ GROUND: Potential Equalization - A ground connection that can be used to ensure that no potential differences can develop between this equipment and other electrical equipment. FUSE: Replace only with the same type and rating of fuse as indicated on the fuse rating label.
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MONITOR DESCRIPTION
ECG X1000: This is an ECG analog wave output. TRIGGER POLARITY SWITCH: Selects output trigger polarity.
PHYS. TRIG.OUTPUT
TRIGGERPOLARITY
NEG POS
QRSVOLUME
MAX
OFF
MIN
REFERS TOOPERATOR'S MANUAL
X 1000
ECG
85VA 50/60Hz
120 Vac
QRS VolumeControl
ECG Output(¼" stereo jack)Tip=ECG X1000
PEQ Ground
Voltage SelectionwheelFuse
(Beneath Panel)
Power Input
Trigger Output/BNCSelects OutputTrigger Polarity
Fuse rating 100V 120V 220V 230V T 1.6 Amp T 1.0 Amp 250V 250V 5mm x 20mm 5 mm x 20 mm
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MONITOR SETUP
MONITOR SETUP
To setup the instrument for operation: 1. Plug the ac line cord into a power source providing the proper voltage. Check the monitor's rear panel to verify the voltage range required by the monitor. 2. Press the POWER switch at the left side of the front panel to turn power on. 3. Connect the patient cable to the ECG connector on the front panel. 4. Connect the Trigger Output from the monitor rear panel to the device being triggered. To change Mains Voltage: 1. Locate power entry module in Rear Panel. 2. Remove line cord. 3. Pry down entry cover. 4. Locate and remove voltage wheel and set for appropriate voltage. 5. Replace fuse with proper size (see fuse rating). 6. Replace cover.
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TRIGGER OUTPUT
TRIGGER OUTPUT The Trigger Pulse The ECG Trigger Output produces a 100 ms, 0 - 5 V trigger pulse starting at the peak of each R-wave, which is available on the TRIGGER OUTPUT BNC connector on the rear panel of the monitor. The following shows the timing of the trigger pulse compared to the ECG waveform.
Trigger-Spot Display Press the TRIG MARK key on the front panel to highlight the portion of the ECG waveform corresponding to the timing of the trigger pulse. Press TRIG MARK again to disable Trigger-Spot. Optional Trigger Delay
Trigger delay is user adjustable by using the Trigger Delay menu. Range is from 0 to 700 ms in 5 ms increments.
Intensity modulation highlights position of ECG where delay occurs.
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ECG MONITORING
ECG MONITORING When ECG monitoring, the display shows the ECG waveform across the center; the heart rate, heart rate limits, and lead selection in the upper left corner; and alarm indications. Also, a heart symbol flashes each time a heartbeat is detected. Safety Considerations
Disposable products are intended for single-use only. Do not attempt to re-use these products. Patient connections are electrically isolated Type CF ⎯♥⎯. For all connections use insulated probes. Don't let patient connections contact other conductive parts, including earth. See instructions for patient connections in this manual. Leakage current is limited internally by this monitor to less than 10 µA. However, always consider additional leakage current that can be caused by other equipment used on the patient at the same time as this monitor. Avoid electrosurgery burns at monitoring sites by ensuring proper connection of the electrosurgery return circuit. If improperly connected, some electrosurgery units might allow energy to return through the electrodes. Rate meters might continue to count the pacemaker rate during occurrences of cardiac arrest or some arrhythmias. Do not rely on rate meter alarms. Keep pacemaker patients under close surveillance.
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ECG MONITORING
Patient Connections To ensure compliance with both safety and performance specifications, use the patient cables supplied by Ivy Biomedical Systems (see Accessories). Use only high quality silver/silver-chloride electrodes or equivalent. Use the following procedure for ECG monitoring: 1. Prepare each electrode site and apply the electrodes. 2. Connect the patient cable to the monitor's front panel ECG input. 3. Attach the leads to the electrodes. 4. Use the procedures described in the following sections for alarm limit settings, lead selection, amplitude
adjustment, and enabling or disabling the filter. ECG Waveform Amplitude (Size) Use the following procedure to adjust the amplitude (size) of the displayed ECG waveform. 1. Press the MENU key once. The first menu appears.
ECG HR LIMITS TRIGGER DELAY RECORDER
2. Press the first programmable key (SPEED 25/50 mm/s) once to select ECG.
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ECG MONITORING
ECG SIZE MM/MV LEAD II FILT
3. Use the top two programmable keys to the right of the display to adjust the ECG waveform amplitude. Increases ECG size Decreases ECG size Lead Selection Select [LEAD] to change the lead selection. The current lead selection is shown below the alarm limits in the upper right portion of the display. Available lead selections are Lead I, Lead II, or Lead III. ECG Filter Select [FILTER] to turn the filter on or off. The filter on/off indication is shown in the upper right portion of the display. The filter sets the frequency response of the displayed waveform as follows: Filtered: 0.5 to 25 Hz Unfiltered: 0.5 to 45 Hz
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ECG MONITORING
Alarm Limits 1. With the first menu (heart rate alarm limits) displayed, select [HR LIMITS] to change the Heart Rate Alarm
Limits.
HR LIMITS HIGH 150 LOW 30
2. Use the four programmable keys to the right of the display to set the high and low heart rate limits. Increases high HR limit Decreases high HR limit Increases low HR limit Decreases low HR limit
Each time you press a key, the corresponding limit changes by 5 bpm. The current limits are always shown in the upper left portion of the display.
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RECORDER OPERATION
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RECORDER OPERATION
101R only Changing Paper Replace the roll of thermal paper as follows. (Recorder paper is Ivy P/N: 590035) 1. Press the paper eject button to open the door at the front of the recorder.
Press Here
If the door does not open completely, pull it toward you until it is completely open. 2. Reach in and remove the spent paper core by pulling it gently toward you. 3. Place a new paper roll between the two round tabs of the paper holder. 4. Pull some paper from the roll. Make sure the sensitive (shiny) side of the paper faces the print head. The
shiny side of the paper normally faces inside the roll. 5. Align the paper with the pinch roller on the door.
Print Head
Pinch Roller
RECORDER OPERATION
Model 101R/NR Service Manual 19
6. Hold the paper against the pinch roller and close the door. 7. The paper should advance one inch. If the paper doesn’t move, open the door and repeat starting at step 5.
Recorder Menus The recorder user interface is through the menu structure of the 101R/NR. 1. Press the MENU key to display the main menu.. 2. Select [RECORDER] to display the recorder menu.
NOTE: At the start of each printout, the printer produces a header consisting of the current readings for all parameters in use at the time of the printout, whether the parameter is displayed or not.
RECORDER OPERATION
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Recorder Modes Use the following procedure to select the printing mode to be used. Selections are DIRECT, TIMED and DELAY. The print mode is indicated in the lower left corner of the display. 1. Press the MENU key once.
ECG HR LIMITS TRIGGER DELAY RECORDER
2. Press the programmable key (TRIG. MARK) once to select RECORDER.
RECORDER SET CLOCK
3. Press the programmable key (SPEED 25/50) to select printing mode. Direct To print in direct, press the PRINT key. Press PRINT again to stop printing. The plot is preceded by a header which contains all parameter readings and the time/date. The speed of the plot and vertical resolution are the same as the display. The plot is labeled with the speed of the plot in mm/s, the recorder mode, and the parameters.
RECORDER OPERATION
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Timed TIMED mode starts by pressing PRINT and prints for 30 seconds. Delay Delay mode plots the 19 seconds before and 12 seconds after the occurrence of an alarm condition or if print button is pushed. To set the Time and Date Use the following procedure to set the date and time. The date and time are indicated in the lower right corner of the display. 1. Press the MENU key once. The main menu appears. 2. Press the programmable key (TRIG. MARK) once to select RECORDER. 3. Press the programmable key (TRIG. MARK) once to select SET CLOCK.
N E X T
11:20 AM 25 SEPT 98 ENTER
4. Press the programmable key (SPEED 25/50mm/s) to place the flashing cursor under the hour, minutes, date, month or year. 5. Press the programmable key (FREEZE) to increase what the cursor is under or press the programmable key (ALARM RESET) to lower what the cursor is under. 6. After changing the settings press the programmable key (TRIG MARK) to ENTER the settings.
ALARM MESSAGES
ALARM MESSAGES Alarm messages are displayed in reverse video. Press ALERT RESET to reset all alarms except LEAD OFF. The following describes each of the alarm indications.
All audible alarms have been turned off. LEAD OFF A lead has been disconnected or the electrode offset potential has exceeded ±0.5 V. This alarm cannot be reset with the ALERT RESET key. HR HIGH The high heart rate alarm limit has been exceeded for four seconds. HR LOW The low heart rate alarm limit has been exceeded for four seconds. ASYSTOLE The interval between heartbeats has exceeded six seconds.
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MONITOR TESTING
MONITOR TESTING Press the TEST key to test the internal functions of the monitor. You should do this each time you begin monitoring a patient. The TEST function generates a 1 mV pulse at 70 bpm, causing a waveform and a 70 bpm indication on the display and a signal at the rear panel connector. If these indications are not present, contact qualified service personnel. Under normal operation, no internal adjustment or recalibration is required. Safety tests and internal adjustments should be done by qualified personnel only. Safety checks should be performed at regular intervals or in accordance with local or governmental regulations. In the event that internal adjustment or recalibration is necessary, refer to the Service Manual for this equipment.
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CLEANING
CLEANING Monitor WARNING: To avoid possible shock hazard, disconnect the monitor from the power source and detach the ECG cable before cleaning. Clean the exterior surfaces of the monitor with a cloth or swab dampened with a warm water and mild detergent solution. Do not allow liquids to enter the interior of the instrument. Patient Cables Do not autoclave the patient cables. Wipe the cables using soap and water or alcohol. Never submerge the cables in any liquid or allow liquids to enter the electrical connections.
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ACCESSORIES
ACCESSORIES Accessories 3 Lead Patient Cable 590170 Patient Leads 590162 BNC Interconnect Cable Assembly 1564-01-10 8 ft long Box of 10 rolls of recorder paper 590035 (101R) Disposal Disposal of devices or consumables must be done in accordance to natural environmental laws.
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THEORY OF OPERATION
THEORY OF OPERATION General This section provides general descriptions of the circuitry in the R Wave Trigger patient monitor. Refer to the schematic diagrams at the end of this manual to find the circuits described in this section. Also see the block diagram in the Troubleshooting section for an overview of the signal flow in the monitor. High Voltage Power Supply and Video Amplifier Purpose of the High Voltage Power Supply The High Voltage Power Supply generates every signal that goes to the crt except the yoke signals, which are created by the Mother Board. CRT Theory Free electrons are created in the base of the crt by applying a voltage to the filament. A large voltage (6.5 kV in this case) between the anode and cathode accelerate the free electrons from the filament to form a beam. This beam strikes the phosphor at the face of the crt and forms a dot on the screen. The yokes, one horizontal (X yoke) and one vertical (Y yoke), aim the beam by deflecting it with a magnetic field. This moves the dot across the screen, and since phosphor takes some time to cool down, this forms a line across the screen when done quickly. The grids (three in this case) can be biased to block the beam or to focus it. They are also used as intensity control. Another way of changing the apparent intensity of the beam is to change the voltage at the cathode, or to quickly switch the cathode on and off. Turning the crt beam on and off is often referred to as z axis control. This causes the beam to appear and disappear. The phosphor holds some of the light from the beam while it is off, making it appear that the beam is on but dim. Raster and Stroke Written Displays Two different strategies are used to display data on the crt: stroke writing for the waveform traces and vertical raster writing for everything else. To simplify this explanation, we will break the screen down into three parts: a vertical raster section on the left to show numbers and icons; as stroke written section in the center for writing waveform data; and a vertical raster section on the right for writing scales, alarm messages, and menus. The vertical raster written portion of the screen is divided into a grid of pixels, each pixel appearing at a fixed point. The space between pixels, although small, is always off. As the beam is traveling vertically down one row of pixels, the beam is turned rapidly on and off. It is on where a pixel is to be brightened and off where the pixel is darkened. When the crt beam reaches the bottom of one row of pixels (one raster) a retrace occurs, sending the beam to the top of the next raster to be drawn.
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THEORY OF OPERATION
The vertical raster portion of the display is accomplished by turning the crt beam rapidly on and off as the beam travels vertically from top to bottom of the display at a frequency of about 16 kHz. At the same time that the beam is rapidly traveling vertically, it is also traveling in the horizontal direction with a trace time of about 4 ms for the left side of the crt. The size of the raster display on the right side of the crt differs and, depending on what is displayed, can take from 1.2 ms to approximately 3 ms. Waveform traces are displayed using stroke writing. Stroke writing is used because it offers a smooth, continuous, high resolution display. Stroke writing entails turning on the crt beam and varying the y-axis (vertical) deflection of the beam while the beam travels horizontally across the x axis. It takes about 2.8 ms to draw one complete waveform trace. Timer Circuit The Timer Circuit creates a waveform to be used by the high voltage module in the creation of the high voltages needed by the crt. It starts with the VERT SYNC input. The VERT SYNC input is a 16 kHz square wave with a duty cycle of 56% that is created on the Mother Board. The main purpose of this signal is to synchronize the video circuits on the Mother Board while the crt displays rasters. It is a steady square wave that can be used as a clock. The Timer Circuit inverts the VERT SYNC signal with a transistor and runs it to a monostable multivibrator (one-shot timer). The one-shot changes the duty cycle of the inverted waveform from 44% to between 12% and 60% (varied by adjusting the EFF potentiometer). The ability to change the duration of this signal allows the operation of the high voltage module to be fine tuned. A small duty cycle means less current to the high voltage module (longer battery life), but it also means lower display intensity during battery operation. From the output of the one-shot, the signal is buffered by a power MOSFET and sent to the high voltage module. High Voltage Module The High Voltage Module contains a circuit board that produces several relatively high voltages to be used in the control of the crt. That circuit board is the Power Module assembly, Part Number 5001-00-XX. More information about the Power Module is included in a section about that board. For now, be aware that when the High Voltage Module is supplied with a 16 kHz square wave and the feedback amplifier is working, it produces three voltages: -100 V, +275 V, and 6,500 V. Feedback Amplifier The Feedback Amplifier takes a feedback signal from the High Voltage Module, inverts it, compares it to a voltage reference (the HV potentiometer), and sends it back to the High Voltage Module. It is used to keep the 6500 volt output of the High Voltage Module within tolerances. When the 6500 volt output is within tolerance, the -100 and +275 volt outputs should also be within tolerance.
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Adjustment Circuit The Adjustment Circuit takes the -100 V and +275 V outputs from the High Voltage Module, adjusts them with potentiometers, and applies them to the grids of the crt. The first grid, G1, adjusts the intensity of the crt. It is adjusted with the INT potentiometer and should be between -100 V and -14 V. The second grid, G2, also adjusts the intensity of the crt. It is adjusted with the CUTOFF potentiometer and should be between -14 V and +275 V. The third grid, G3, adjusts the focus of the crt. It is adjusted with the FOCUS potentiometer and should be between -100 V and +275 V. Cathode Generation Circuit The main function of the cathode generation circuit is to produce the CATHODE signal for the crt. CATHODE is a mixture of the TREND INT and COAX Z signals. It turns the beam of the crt on and off. The COAX Z IN is a digital signal that originates on the Mother Board, where it is called Z. It tells the crt when the beam should be off (between waveform strokes or during a retrace). The beam of the crt should be off when this signal is high. TREND INT is an analog signal used to make the waveform traces brighter or darker in relation to the raster-written data on the crt. The CATHODE Z IN signal enters the cathode generation circuit at the input of the Z buffer. The Z buffer contains an inverting buffer and transistor. The inverting buffer allows the signal to drive the following transistor without being severely loaded. That transistor also inverts the signal again and changes the level of the output. The signal produced by the transistor is similar to the CATHODE signal but not identical. TREND INT enters the circuit at the trend intensity buffer, which contains a transistor, a diode, and the TREND INT potentiometer. The transistor buffers and inverts the signal. Next, the TREND INT potentiometer changes how much TREND INT signal is allowed to enter the CATHODE signal. Finally, the diode prohibits current from flowing the wrong way through the circuit. As a whole, the trend intensity buffer sinks current from the CATHODE signal for the desired effects.
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Low Voltage Power Supplies DC Voltages The Low Voltage Power Supply is on the Mother Board. Its inputs are 13.4 V~ and 6.9 V~ from the power transformer. Regulators U3, U4, and U5 generate +12 V and -12 V from the 13.4 V~. D23 uses the -12 V as an input to produce -7 V. Regulator U10 and pass transistors Q13 and Q18 generate ±8 V. From the 6.9 V~, +8 V unregulated is taken from rectifier diodes D5 and D6. Regulator U2 generates +5 V. Isolated DC Voltages Isolation transformer T1 passes power from the non-isolated portion of the Mother Board to the isolated portion. The 16 MICROSECOND SYNC signal triggers U31 which turns Q36 on and off. This creates a varying current through the windings of T1 to allow power to be passed to transformer's secondary winding on the isolated portion of the circuit. The rectifiers D50 through D51 generate an unregulated ±6.5 V. Regulator U39 produces ±5 V through pass transistors Q38 and Q39. ECG Input Isolated Amplifiers The ECG input signals (LL, LA, RA) are applied to overvoltage protection devices and to input amplifiers U54 A, B & C. The signals are then routed to lead selector switch U45. The selected signal is amplified by U46 and driven by optical couplers U42 and U43, which pass the signal to the non-isolated portion of the circuit. Lead Off Sensor If any of the leads are disconnected, a large offset on the input signal is detected by U47, which generates the LEAD OFF signal. This signal is passed to the non-isolated circuits through coupler U38 and sent to the digital circuits to generate the LEAD OFF alarm. This signal, through Q46, disables the ECG amplifiers. Shield Drive The common-mode error signal that serves as input to the shield drive circuit is derived from the signals summed through R242 and R243. This signal drives the shield drive amplifier U47. The output of the shield drive amplifier returns to the patient cable serving to prevent 50/60 Hz power interference. Lead Selection Lead select switch U45 selects proper signals according to the levels of the L0 and L1 signals from the digital circuitry. These signals are set according to the lead selection made by the user.
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THEORY OF OPERATION
Test Signal Generation One of the combinations of the L0 and L1 signals indicates TEST mode. In this mode, the lead select switch is off, and a 70 bpm signal generated by U44 is sent to ECG amplifier U55D. ECG Waveform ECG Filter The signal from the output of coupler U40 and then through a low-pass filter to amplifier U26B. The signal at U26A Pin 1 is the filtered output. This signal is switched in or out by FET Q30 which is controlled by the NOTCH signal from the digital circuitry. Potentiometer RV13 (60 Hz) and RV14 (50 Hz) is used to adjust the notch filter. The processor senses the line freq from U18B and automatically switches in the correct notch filter. X1000 Output The output at U26 Pin 1 is the X1000 signal that is sent to the rear panel for use with a recorder or other equipment. ECG Gain The signal from U24 Pin 1 goes to ECG gain amplifier U24 Pin 7. The gain of this circuit is determined by resistors switched into the circuit by U25. This switch is controlled by signals G1, G2, and G3 from the digital circuitry. The gain depends on the settings made by the user. The output signal from U24 Pin 7 goes to the A/D converter in the digital circuitry. A/D Converter The A/D converter is U21 along with amplifier U22A. The converter samples the analog ECG signal and generates a series of 1,024 eight-bit numbers which can be stored in memory and then sent through the D/A converter for ECG waveform display.
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Cardiotach Peak Detector The peak detector generates a pulse at the peak of each R wave. The time between these pulses is used to compute the heart rate. See the Peak Detector block diagram below. 4.5 SECOND TIME-OUT FROM CPU FILTER FULL-WAVE SAMPLE THRESHOLD ECG U26C RECTIFIER AND HOLD RV12 FROM D33, D34 U19, U23D NOTCH FILTER PEAK DETECT 7-70 MS COMPARATOR TEST U23D, D37, C82 U30A EVENT TO DIGITAL CIRCUITS PACEMAKER RESET U20 The ECG signal is picked off by amplifier U26C through a filter made up of R126 and C66 and the components in the feeback of U24D. This removes the baseline and T waves from the ECG signal. The signal is rectified by diodes D33, D34 to make sure that the R waves are always positive. The output of the filter and rectifier at U23 Pin 8 is a group of positive pulses for each QRS complex. The first large pulse is the R wave. For a pulse to be detected, it must exceed a threshold, which is based on the amplitude of the last accepted pulse and is fine adjusted by potentiometer RV12. Sample and hold circuit U19 with U23D holds the peak level of each accepted pulse to form the threshold for the next pulse. When a pulse exceeds the threshold, U23B Pin 7 goes low. When the peak occurs, U23B Pin 7 goes high. The time between when the signal exceeds the threshold and when the peak occurs must be between 7 and 70 ms for the pulse to be accepted. The 7 and 70 ms timing pulses are generated by one-shots U30. If the signal is accepted, the CPU generates a 10 ms EVENT pulse. The leading edge of the EVENT pulse occurs at the peak of the R wave. This signal goes to the digital circuitry for heart rate computation. Each filtered and rectified QRS complex usually generates more than one acceptable pulse. Therefore, the EVENT signal usually has two 10 ms pulses for each heartbeat. A 200 ms blanking in the digital circuitry eliminates all but the first pulse. A 4.5 second time-out is produced by the CPU. If no acceptable pulses occur for 4.5 seconds, this one-shot times out and generates a signal that turns on U19. This causes the threshold circuit to acquire a new level. Whenever a pulse is detected that is less than 7 ms wide, it is assumed to be a pacemaker spike. In this case, U20 is triggered, generating a 30 ms pulse, which turns on Q22 and Q23 to discharge the filter capacitors and turns on Q31 to inject the last threshold level into the peak detector comparator input. The Trigger Output at the rear panel connector is derived from the EVENT signal. This output is one 1 ms pulse for each QRS complex, with the leading edge corresponding to the peak of the R wave. The signal level is -12 V to
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THEORY OF OPERATION
+12 V. Other output pulses (+5 TTL) may be generated by removing U12 and changing C56 and R111. See component matrix on schematic. Rate Computation The EVENT signal goes to PLD U36 in the digital section where the 200 ms blanking removes all but one pulse for each heartbeat. The ouptut of the flip-flop goes to the interrupt input of the microprocessor U48. The microprocessor measures the time between interrupt pulses and computes the heart rate. Alarm Generation The microprocessor compares the current heart rate to the limits set by the user. If the limits are exceeded, the appropriate alarm signal is generated. CRT Signals Refer to the Key Signals portion of the Testing and Troubleshooting section of this manual for diagrams of each of the crt signals. Vertical Deflection The display generation is broken up into two timing periods, one for the raster display (digital information and alarms) and the other for the stroke display of the ECG waveform. Each time period is 9.2 ms. The raster display also contains two time periods. The first is for the left display and the second for the right display. The left display contains the heart rate display, the setup information, and the ALARMS OFF indicator. The right display contains the alarm indicators. During the stroke display period, the vertical deflection is the ECG waveform signal. This signal is selected through FET Q15 to the vertical deflection amplifiers U6 and U9 and transistors Q1, Q2, Q5 & Q6. During the raster display period, the vertical deflection is the vertical ramp generated by U8B, with its timing set by the V SYNC signal. The vertical ramp is passed through Q15 to the vertical deflection amplifiers. Horizontal Deflection The horizontal ramps are generated by U16 and U17 with timing controlled by the H SYNC signal. Four ramps are generated in each timing cycle. The two small ramps are for raster display, and the large ramps are for stroke display. An offset for the right side raster display is added to the circuit through U11D. Horizontal Correction Because the face of the crt is flat and the beam originates at a single point, the speed of the beam as it strikes the face is greater near the edges than at the center. Therefore, correction circuitry is required to produce a waveform that is linear over the entire screen. The linearity correction is provided by U17 and associated components. The correction circuitry produces two signals that are added to the horizontal ramp to correct the linearity. First, U16A integrates the horizontal ramp to produce a parabolic waveform. This waveform is the mathematical equivalent of the speed of the beam across the crt face. This signal is inverted by U16B. The original signal and its inverse are fed into the SYM potentiometer RV6, which selects the portion of the positive or negative waveform required to produce a symmetrical trace between the left and right sides of the crt. The second signal is an S-shaped waveform generated by U17A, which integrates the parabolic signal from U17B. This S-shaped signal, when added to the horizontal ramp has the effect of slowing the beam near the edges of the
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screen. The amount of this signal added to the ramp is adjusted by the S potentiometer RV4. This allows adjustment of linearity between the edges and the center of the screen. Using the adjustments described above, it is possible to achieve a linear signal across the entire crt screen for any crt. These adjustments should be done whenever a crt or Mother Board is replaced. The complete horizontal deflection signal including correction is summed at U7 Pin 2 and goes through amplifier U7 and transistors Q3, Q4, Q7 & Q8. Unblanking The unblanking (Z) signal indicates when to brighten the crt. This signal is created in the digital section. For the raster display, short pulses cause the brightening of each dot needed to generate the characters to be displayed. For the stroke portion, the signal is high during the entire horizontal sweep displaying the ECG waveform. Audio Circuits Two types of audio is produced by the monitor: a QRS beep and an alarm tone. The QRS beep is a short tone that is generated each time a QRS complex is detected by the monitor. The alarm tone is produced when any of the alarms are triggered. The alarm tone can be disabled by pressing the front panel ON/OFF button. ECG Audio The audio signal originates in the digital circuitry. The ECG AUD signal is enabled at U51 by an output from the processor's I/O port U51 Pin 11. This signal allows the audio frequency from U51 to be passed to the audio amplifier. Two levels of ECG AUD, through resistor R90, go to the rear panel QRS VOLUME switch as AUDIO HI and AUDIO LO, where the user can select a high, low, or off setting. The selected signal then goes to the audio amplifier U13 and transistors Q19 and Q20, which drive the speaker. Alert Audio The ALRT AUDIO is enabled by the output from U36 Pin 18 in the digital circuit The ALERT AUD signal passes through volume adjust potentiometer RV11 to the audio amplifier U13.
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THEORY OF OPERATION
Digital Circuitry The digital circuitry consists of the microprocessor and its associated components. The 8 MHz clock is generated by the F1100.. The microprocessor is U48. U49 is the read only memory (ROM), which contains the program to operate the system. U32 is an input/output (I/O) port for passing information to and from the microprocessor circuits. U52 is random access memory (RAM). This memory is for temporary storage of data that the microprocessor must store. U36 generate timing signals for the system. For the stroke display, the microprocessor sends the digital ECG waveform through FIFOs U27 and U28 to D/A converter U29 to generate the D/A signal that gets switched into the vertical deflection signal during ECG waveform display. For raster display, the microprocessor sends the data through U36 and U15 to generate the Z signal. This signal brightens the crt at the proper times to generate the characters.
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TESTING AND TROUBLESHOOTING ECG Test Equipment Required: ECG Simulator (Fogg Model M310 or equivalent) Initial Settings for the Test HR high alarm limit 120 HR low alarm limit 40 Lead select I Filter ON Alarms ON (ALARMS OFF message not displayed) ECG Test Procedure 1. Connect the patient cable and simulator to the monitor and set the simulator as follows: • Heart rate of 70 bpm • Amplitude of 1.0 mV 2. Observe the following on the monitor display: • ECG Lead I is displayed and is noise free • Heart rate of 70 ±1 bpm • The heart next to the heart rate indicator flashes with every QRS complex displayed. 3. Verify that ECG Leads I, II, and III display properly. 4. Change the heart rate on the simulator to 40 bpm. Notice the following: • The HR LOW message appears over the ECG trace. • Heart rate value of 40 ±1 bpm is displayed.
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5. Press ON/OFF. Notice the following: • Audible alarm stops • ALARMS OFF message is displayed. 6. Press FREEZE. The waveform stops. 7. Press FREEZE to make the trace move again. 8. Press SPEED. The trace speeds up to twice its previous speed. 9. Press SPEED to slow the trace down again. 10. Press ON/OFF. The ALARMS OFF message goes off. 11. Adjust the high heart rate limit to 100 bpm. 12. Set the simulator heart rate to 120 bpm. The HR HIGH message is displayed, and an audible alarm sounds.
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Troubleshooting The monitor is made up of the following parts: Front Touch Panel Power Input Rear Panel Heat Sink Mother Board High Voltage Power Supply Board Trigger Board CRT Display This manual provides information to help determine which of these parts might be the cause of a problem. A simple block diagram of the monitor is included in this section to help. See the Disassembly procedure in this manual for removing the top cover. General Checks The first step is to determine what doesn't work. If nothing works, check those things that you would check on any instrument. 1. Make sure of the power source 2. Check the monitor's main fuse 3. Check the fuses on the low voltage side inside the monitor. CRT Display The display is generated from signals developed on the Mother Board. The crt gets its high voltage and cathode signal from the High Voltage Power Supply board. If there is no picture at all, the problem is most likely the crt itself or the HVPS board. See the Key Signals section to check these components. If there is a display but either the horizontal or vertical deflections are wrong, the problem is most likely the Mother Board. Mother Board The Mother Board has all circuitry for processing the ECG, computing heart rate, and generating the alarms and the audio. Therefore, any problems with these functions are caused by problems on the Mother board. Once you have determined the major component causing the problem, refer to the Disassembly section for instructions on replacement.
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Troubleshooting Table General
No Apparent Power
1. Power source 2. Main fuse 3. Internal fuses
No Display (Check Key Signals)
1. CRT 2. HVPS board 3. Mother Board
CRT
Bad Horizontal or Vertical
1. Mother Board
Test OK
1. Patient Cable 2. Connector-Front Panel to Mother Board 3. Input Amplifiers on Mother Board
ECG
Test Not OK
1. Mother Board
No Audio At All
1. Mother Board 2. Connection to Speaker 3. Speaker
No Alarm Audio
1. Alarm On/Off Setting 2. Mother Board
Audio
No ECG Audio
1. Rear Panel switch setting 2. Mother Board
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Block Diagram AUDIO CIRCUITS SPEAKER U13,Q19,Q20 FRONT PANEL RAMP HORIZONTAL GENERATOR DEFLECTION U16A U7 HORIZONTAL CORRECTION U17 HIGH VOLTAGE POWER SUPPLY AND VIDEO CRT AMPLIFIER CPU AND DIGITAL CIRCUITS D/A CONVERTOR U29 MULTIPLEXER VERTICAL Q15, Q16 DEFLECTION U6 RASTER GENERATOR U8B A/D CONVERTOR U21 TRIGGER PEAK CIRCUITRY TRIGGER DETECTOR U18A, U12 OUTPUT U23B ISOLATED TEST CIRCUIT U44 PROTECTION LEAD NOTCH CIRCUITS SELECT FILTER U45 U26C ECG INPUT SHIELD DRIVE ECG X1000 BUFFER MOTHER BOARD
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Voltage Measurements The following procedures include voltage checks, key waveforms, and some adjustments. These procedures are only for qualified technicians with appropriate equipment, such as an oscilloscope and digital voltmeter. In most cases, the procedures in the Troubleshooting section of this manual are adequate for determining which major component of the monitor is the cause of a problem. Schematic diagrams of the monitor are included at the end of this manual. See the Disassembly procedure in this manual for removing the top cover. Measure the following voltages with a DVM using the ground connection lug on the rear panel as the reference. See Mother Board layout for test point (TP) locations. Unregulated Voltages +20 V Measure at fuse F3 Normal: 14.5 to 20 V -20 V Measure at fuse F2 Normal: -14.5 to -20 V +8 V Measure at fuse F1 Normal: 6.5 to 8.5 V Regulated Voltages +12 V Measure at +12 TP Normal: 11.6 ±0.7 V -12 V Measure at -12 TP Normal: -11.6 ±0.7 V +12 X Measure at +12X TP Normal: 12 ± 0.5 V +5 V Measure at +5 TP Normal: 5 V ±100 mV +8 V Measure at +8 TP Normal: 8 V ±10 mV -8 V Measure at -8 TP Normal: -8 V ±100 mV -7 V Measure at -7 TP Normal:-7 V ±200 mV VREF Measure at V REF TP Normal: 2.41 V ±5 mV Isolated Voltages Measure the following in the isolated section of the Mother Board using ISOL GND TP as the reference. See Mother Board layout for test point (TP) locations. +6.5 V Measure at +6.5 TP Normal: +6.5 to 7.0 V -6.5 V Measure at -6.5 TP Normal: -6.5 to 7.0 V Smaller of above must be 6.5 V; neither more than 7.0 V. +5 V Measure at +5 TP Normal: 5.0 V ±200 mV 5 V Measure at -5 TP Normal: +5 reading ±100 mV Both 5 V must be within 100 mV of each other.
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High Voltage Power Supply +275 V Measure at +275 TP Normal: +100 to +400 V -100 V Measure at -100 TP Normal: -50 to -125 V Key Signals The following are a few signals to help verify the proper operation of the monitor. Use an oscilloscope and refer to Mother Board layout for test point locations. ECG Waveform 1. Press and hold the TEST button on the monitor's front panel. 2. Put the scope probe at the rear panel X1000 output. The signal should appear as 1 V peak pulses. The
same waveform should appear on the monitor's display. The rate indication on the display should be 70 bpm.
This verifies the operation of the ECG circuitry from very near the front of the monitor's ECG section. To
verify the remaining circuit, use a simulator at the ECG input to generate a 1 mV ECG signal. CRT Display The following are signals generated by the Mother Board for creating the display. If these signals are correct but the display isn't, the problem is not on the Mother Board. See Mother Board layout for test point locations. For each of the following the signals, trigger the oscilloscope (negative) on Raster Enable (RE test point). Raster Enable RE Test Point
Vertical Deflection Signal Vi Test Point
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Horizontal Deflection Signal Hi Test Point
CRT Unblanking Signal (Z) Z Test Point - Part of signal blinks with alarm indication.
To verify operation of the High Voltage Power Supply board, check the dc voltages as indicated in the Voltage Measurements section (High Voltage Power Supply). Also check the following dc filament voltages at the crt socket harness. 5 V brown Normal: 4.9 to 5.1 V -7 V black Normal: -6.8 to -7.1 V
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Adjustment Procedure The following adjustments are not meant as field procedures. However, if these procedures are attempted, they must be done correctly and according to the procedures listed here. See the Disassembly procedure in this manual for removing the top cover. Equipment Required Digital Voltmeter Sine Wave Generator Oscilloscope ECG Simulator ECG Signal 1. Press and hold the TEST button on the monitor's front panel. 2. With an oscilloscope, look at the signal at the X1000 output on the rear panel. 3. Adjust RV17 (ECG BAL) until the signal's baseline is at 0 V. 4. Adjust RV18 (ECG GAIN) until the peak signal is 1 V. 5. Repeat adjustments as necessary. 50/60 Hz Notch Filter 1. With the monitor's front panel controls, set the filter to ON and the lead selection to Lead I. 2. Insert a 10 mV p-p 50 or 60 Hz sinusoidal signal into the monitor's front panel ECG input. See the
diagram below for a suggested input circuit.
3. With an oscilloscope, look at the signal at the NOTCH test point on the Mother Board. 4. Adjust RV13 for 60 Hz and RV14 for 50 Hz for minimum amplitude signal at the NOTCH test point. This
signal should be ≤600 mV p-p. To turn on the correct filter set TP21 high (+5) for 60 Hz and ground for 50 Hz. A clip lead tied to +5 or ground will accomplish this.
5. From the front panel, set the filter to OFF. The signal at the NOTCH test point should be approximately 10
V p-p. 6. To test the auto notch function, plug unit into a variable freq. power generator and slowly change the line
freq. from 50 to 60 Hz. Peak Detector 1. With the oscilloscope, look at the signal at U23 Pin 7.
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2. Connect the ECG simulator and adjust the ECG level so that only one pulse is present at U23 Pin 7. 3. Put the oscilloscope on the T1 test point. 4. Put the oscilloscope on the T2 test point. 5. Set the simulator for an ECG input signal of 300 µV. Put the oscilloscope probe at U23 Pin 7. 6. Adj RV12 (T'HLD) until the signal at U23 Pin 7 changes to two pulses. CRT Display • Beam Centering 1. Reduce the intensity using the intensity pot at the top of the High Voltage Power Supply board. 2. Remove connector J202 from the Mother Board. 3. Adjust the rings at the rear of the crt to place the beam in the center of the screen. 4. Replace J202 and readjust the intensity. • Yoke Straightening 1. With no ECG input signal, loosen the screw holding the yoke clamp at the rear of the crt. 2. Rotate the yoke so that the trend line on the display is horizontal. 3. Tighten the yoke clamp screw. • Horizontal Adjustments 1. Put the oscilloscope on U16 Pin 1. There should be two large ramps and two small ramps. 2. Adjust RV15 so that the peak of the large ramp is 3.4 V. 3. Adjust RV5 so that the trend line (ECG waveform line) is 132 mm long. 4. Adjust RV16 (SS ADJ) so that the ALARMS OFF display area is 33 mm across. 5. Press the TEST button on the monitor's front panel. When pulses appear across the entire screen, press
FREEZE to stop the motion. 6. Adjust RV4 (S) and RV6 (SYM) to make the pulses evenly spread across the screen. The S adjustment
controls the linearity between the middle and ends, and the SYM adjustment controls the linearity from end to end.
7. Press FREEZE and release TEST so that there are no pulses. Press the MENU button. 8. Adjust RV9 (RSTP) so that the right end of the trend line just touches the left of side the menu box. 9. Repeat the above steps as necessary. • Vertical Adjustments
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1. Put the oscilloscope on U8 Pin 7. 2. Adjust RV1 (RASTER) so that the negative peak of the signal at U8 Pin 7 is at -2.5 V. 3. Press the MENU button on the monitor's front panel. 4. Adjust RV2 (V GAIN) so that the menu box is 86 mm high. 5. Adjust RV3 (V BAL) to center the menu box between the top and bottom of the screen. 6. Press the MENU key again to display the second menu. 7. Adjust RV8 (DA0) so that the trend line is at the same level as the center horizontal line in the second
menu. 8. Repeat the above adjustments as necessary. • High Voltage Power Supply Board 1. Adjust the Focus and Intensity adjustments near the top of the High Voltage Power Supply board for the
desired display. 2. Adjust the Trend Intensity adjustment on the HVPS board to set the trend line intensity separately. • Isolation and Leakage Tests Use a leakage tester or use the ac voltage range on a digital voltmeter to measure across a 1 kΩ resistor in parallel with a 0.15 µF capacitor and 10 Ω resistor.
1. Measure between a known ground and the monitor's ground post on the rear panel. Wth the line cord
properly grounded, with the ground removed, and with the line cord reversed, the readings should be less than 20 µA.
2. With the line cord grounded, measure between shorted patient leads and the hot side of the ac line. The
reading should be less than 10 µA.
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ASSEMBLY AND DISASSEMBLY This section describes procedures for disassembly of the monitor for replacement of major components. For reassembly, use the same procedures but work in reverse. Always remember to save all hardware and to re-install any connectors removed during disassembly. Removing the Cover WARNING: Potentially dangerous voltages are present inside the monitor. Always disconnect the power cord from the ac outlet before removing the cover. Failure to comply could result in personal injury. 1. Disconnect the power cord from the ac outlet. 2. Remove the two screws in the rear that attach the top cover to the rear panel. 3. Slide the cover back and lift it off. 4. To remove the bottom cover, turn the monitor upside-down and use the same procedure. Removing the High Voltage Power Supply 1. Remove the top cover as described above. The High Voltage Power Supply board is mounted vertically near the front of the monitor near the crt. 2. Remove J301 from the High Voltage Power Supply board. 3. Remove the connector from the back of the crt. 4. Remove the crt anode cap from the front of the crt by pulling up on the rubber from the edges. 5. Pull the High Voltage Power Supply board up and out of the card guides.
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Removing the Yoke The yoke is the electronic assembly located at the rear of the crt. 1. Remove the top cover as described above. 2. Remove the High Voltage Power Supply board as described above. 3. Remove J202 from the Mother Board. 4. Loosen the screw holding the yoke clamp on the crt and slide the yoke assembly off. Removing the CRT 1. Remove the High Voltage Power Supply board as described above. 2. Remove the spring across the front of the crt. 3. Remove the two screws holding the crt bracket on the center side of the crt. 4. Tilt the crt toward the side of the monitor and guide it out of the unit. 5. After replacing the crt, do the CRT Display adjustments described in the Testing and Troubleshooting
section of this manual. Replacing the Main Power LED 1. Remove the top cover, the High Voltage Power Supply board, and the crt as described above. 2. Remove the LED retainer and pull out the LED. 3. Push in a new LED and replace the retainer. Removing the Recorder Assembly 1. Open the recorder door and remove the paper from the recorder. 2. Loosen the two captive Philips-head screws inside the recorder housing. 3. Pull the Recorder Assembly straight out from the monitor.
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ASSEMBLY AND DISASSEMBLY
Removing the Mother Board The Mother Board is the main board in the monitor and is located across the bottom of the monitor. 1. Remove top and bottom covers as described above. 2. Remove the following connectors: J201 Main Harness J202 Yoke J203 Front Panel J204 ECG Input J205 LED 3. Turn the monitor over and remove the screw at the front of the Mother Board that attaches the board to the
front panel. 4. Remove the four screws across the bottom of the rear panel. 5. Squeeze the tabs on each of the plastic standoffs and gently pull on the board to remove it. Removing the Touch Panel The Touch Panel is glued to the front bezel. 1. Remove the top cover as described above. 2. Disconnect J203 (ribbon cable) from the Mother Board. 3. Use a knife to work a corner of the Touch Panel loose and pull the panel away from the front bezel. 4. Feed the ribbon cable through the slot in the front plate. 5. Make sure the clear plexiglas window is in place in the bezel. Then feed the ribbon cable on the new
Touch Panel through the slot in the bezel. 6. Peel the protective backing from the Touch Panel and carefully press the panel onto the front bezel. 7. Connect J203 (ribbon cable) to the Mother Board.
48 Model 101R/NR Service Manual
PURCHASING INFORMATION
PURCHASING INFORMATION Parts List The following are the part numbers for the major components in the monitor. Component Part Number High Voltage Power Supply & Video Assy 1117-00-01 Mother Board 5119-00-01 CRT 570000 LED 1062-00-01 Front Touch Panel (101R) 1010-03-10 Front Touch Panel (101NR) 1010-04-10 Terms and Conditions • All prices are F.O.B. Branford, Connecticut. Payment: Net 30 days. • Minimum order is $100 on all orders requiring an invoice prior to payment. When payment accompanies
purchase order, no minimum applies. • A 15% restocking charge will be made on an instrument returned for credit or exchange, unless a waiver is
issued, in writing, by an employee of Ivy Biomedical Systems, Inc. • One instruction manual and service instructions are supplied with each instrument. Additional copies may be
ordered at $25 each.
Model 101R/NR Service Manual 49
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
J201-6
J201-15
TO SHT. 4
TO SHT. 4
J201-10
J201-14
J201-18
G
D
S
TO SHT. 4
D
S
G
J201-16
J201-32
J201-25
J201-21
J201-22
J201-33
J201-34
J201-3
J201-29
J201-11
J201-12
J201-13
J201-17
J201-35
J201-36
J201-23
J201-4
J201-5
J201-9
OUTPUT
J201-27
J201-31
TO SHT. 4
|LINK
TO SHT. 4
TO SHT. 4TO SHT. 4
B
CE
BC
E
BE
C
B
E C
**
*
TO SHT. 4
TO SHT. 4
TO SHT. 4INSTALL WITH
RECORDER OPTION
OPTION 1
OPTION 2
OPTION 3
RV10
C56
1ms
60.4K
100K
.01UF
200ms
806K
200K
.22UF
* TRIGGER PULSE OUTPUT
1UF
60.4K
100K
DATEBYDESCRIPTIONREVREVISIONS
R111
01 REVISED FOR REV-01 ARTWORK FAB PER ECN 741. GP 11-26-97
4. ONLY 1 OF THE 3 OPTIONS ARE TO BE POPULATED WITH COMPONENTS AT A TIME.
TO SHT. 4
GP 7-27-98REVISED PER ECN 804.02GP 7-27-9803 REFERENCE REJECTED ECR 803.GP 7-27-9804 REVISED PER ECN 805.
05 REVISED PER ECN 817. GP 8-5-9806 REVISED PER ECN 868. GP 1-25-9907 REVISED PER ECN 934. GP 4-12-9908 REVISED PER ECN 970. GP 8-6-9909 GP 11-20-00REVISED PER ECN 1052.
NOTES:1. ALL RESISTORS ARE 1/4W 1% U.O.S.
L1,LD3,Q48,R274,RN2,RV19,T1,TP43,U54,Y1.
2. LAST USED: C144,D73,F4,FB4,J207,JP5,
3. NOT USED: JP2,JP3,U19,U37,U50.
7-17-017-17-01
GPGP
REVISED PER ECN 1104.REVISED PER ECN 1105.
1011121314
REVISED PER ECN 1216.REVISED PER ECN 1217.REVISED PER ECN 1218.
GPGPGP
12-12-0212-12-0212-12-02
100ms/150ms
15 REVISED PER ECN 1251. GP 2-4-03
|C:\ORCAD\SHEET\SH5119\5119-002.SCH|C:\ORCAD\SHEET\SH5119\5119-003.SCH|C:\ORCAD\SHEET\SH5119\5119-004.SCH|C:\ORCAD\SHEET\SH5119\5119-005.SCH
5119-00-01 (-03 SCHEMATIC) 15
MOTHER BOARD 1 ASSY, WITH RECORDER OPTION
IVY BIOMEDICAL SYSTEMS INC.11 BUSINESS PARK DRIVEBRANFORD, CT. 06405(203) 481-4183
C1 4Tuesday, March 08, 2005
Title
Size Document Number Rev
Date: Sheet of
+12V
+10/13.5VDC
13.4_VAC
FILTER_GND
FILTER_GND
A_GND
A_GND
A_GND
13.4VAC
-12V
A_GNDAUDIO_HI
AUDIO_OFF
6.9_VAC SPEAKERAUDIO_LO6.9VAC SPEAKER_GND
+5VFILTER_GND FILTER_GNDAUDIO_SHIELD13.4_VACECG_VOLUME13.4VACECG_AUDIO +10/13.5VDCA_GND A_GNDFIL_GND FIL_GND
6.9_VAC
6.9VAC
FIL_GND
FIL_GND
D_GND
D_GND
D_GNDAUDIO_HI
ECG_AUDIO
ECG_VOLUME
AUDIO_LOAUDIO_OFF
AUDIO_SHIELDSPEAKER_GND
SPEAKER
T500
ALERT_AUDIO
DELTRG
ALERT_OUT
V_SYNC-
ZZ_GND
T150-
ECG_AUDIO
TREND_INT
ECG_X1000
REC_GND
LNFREQ
+12VREC
TRGOUT
D
D
D
D
DD
D
DD
D
D
D
A
D
D
DD
A
D
D
D
D
A
A
A
A
A
AA
A
A
A
DD
D
D
D
D
D
D
D
A
+12V
+12V
+12X
+12V
+5V
+5V
+5V
+5V
+12V -12V
+5V
+12V+5V
-12V-12V
-12V
-12V
-12V
+5V
+8V
-8V
+12V
+5V-7V
-7V
+12V
U13LF3513
2
1 5
6
74
R9249.9K
TP17TRIGGER
J207POWER ON
LED
12
R91
30.1KC5210000PFNPO
R81470 OHM1/2W 10%
C51
.1UFCER
C49.0047UF MP
TP9+12V
R97100 OHM
2W 5%
R77
301K
R271402OHM
R76
499 OHM
U4LM78L12ACZVI
GN
D
VO
R272
1K
TIME ADJ.RV10
TOP ADJUST
C4.1UF CER
R87
3.01KC48.022UF MP
R7547.5 OHM
U10AMC34002P
1
84
3
2
Q202N3903
13
2
TP5+12X
+
-U10B
MC34002P
756
+ C1210000UF35V
Q192N3906
13
2
+ C1310000UF35V
R8247.5 OHM
F3
3ASB 2AG
R8630.1K
F4
3ASB 2AG
TP14SPEAKER
D10
1N5624
D91N5624
TP24A GND
C50
.1UFCER
TP15D GND
D8
1N5624
R894.99K
D111N5624
FC FC
+ C231000UF 16V
FC
+ C341000UF 16V
FC TP18+8V
TP11-8V
R5010K .1%
10PPM
C56
R4810K .1%10PPM
D281N4148
D21
1N4148
R449.09K
R83100K
R8410K
R4549.9K
+ C306.8UF TANT
D5
1N5624
C31
.1UFCER
C47
.01UFMP
D15ICL8069CCZR
D6
1N5624
D231N5338B
C32
.1UFCER
1.5ASB2AG
F2
TP20-7V
U3LT1085CT-12
H.S.
VI
GN
D
VO
FC
1.5ASB2AG
F1
+ C1415000UF16V SH
R47
1K
FC
H.S.U1
LT1085CT-12
VI
GN
D
VO
R4620K
U2LM2940T-5.0H.S.LM2940T-5.0
VI
GND
VO
FC
R41
10K
Q132N39061 3
2
FC
R3910 OHM
R43
499 OHM
Q112N3903
13
2
R3110 OHM
Q12
2N3903
13
2
R491K
R421K
R51499 OHM
R38475 OHM
Q182N3903
1 3
2
R4022.1 OHM
R52
10 OHM
J206174000
1234
TP19+5V
D121N5624
+ C52200UF35V
C1.1UF CER
TP10-12V
D71N5624
R793.01K
+ C32200UF35V
R785.11K
+ C66.8UFTANT
R951K
C59
1000PFNPO
+C45
100UF 25V
+C46
100UF 25V
U12MC1488P
14 1
2
4
3
659
10
7
1312
8
11
+V -V
1A
2A
1Y
2Y2B
3A3B
GN
D
4B4A
3Y
4Y
Q17
2N5460 3
21
R111
J201194000
REAR PANEL
1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 36
D221N4148
R801.47M
C54.033UF MP
R9610K
+ C21000UF16V
R902K
R11310K
RV1120K TOP
AUD. VOL.
R11210K
R1144.75K
U18AICM7556
6
3
51
2
4 14
7
TR
CV
Q
DIS
THR
R V+
V-
C58
.22UFMP
R851.47M
D291N4148
U18BICM7556
8
11
9
1312
10
TR
CV
Q
DIS
THR
R
Q212N5460
3
21
U5LT1033
H.S.LT1033
VI
AD
J
VO
C53
.1UF MP
C55
10000PFNPO
R11K
R8847.5 OHM
R2121 OHM
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
G
S
D
G
D STO SHT. 4
TO SHT. 4
TO SHT. 4
G
S D
G
DS
TO SHT. 4
G
S
D
TO SHT. 4
VERT. YOKE 2
VERT. YOKE 1
HO
R. YO
KE 2H
OR
. YOKE 1
J201-7
TO SHT. 4
TO SHT. 1
BE
C
BE
C
BE
C
BC
E
B
E
B
E
B
C
E
B
C
E
BC
E
C
C
DATEBYDESCRIPTIONREVREVISIONS
01 REVISED FOR REV-01 ARTWORK FAB PER ECN 741. GP 11-26-97GP 7-27-98REVISED PER ECN 804.02GP 7-27-9803 REFERENCE REJECTED ECR 803.GP 7-27-9804 REVISED PER ECN 805.
05 REVISED PER ECN 817. GP 8-5-9806 REVISED PER ECN 868. GP 1-25-9907 REVISED PER ECN 934. GP 4-12-9908 REVISED PER ECN 970. GP 8-6-9909 GP 11-20-00REVISED PER ECN 1052.
NOTES:1. ALL RESISTORS ARE 1/4W 1% U.O.S.
L1,LD3,Q48,R274,RN2,RV19,T1,TP43,U54,Y1.
2. LAST USED: C144,D73,F4,FB4,J207,JP5,
3. NOT USED: JP2,JP3,U19,U37,U50.
7-17-017-17-01
GPGP
REVISED PER ECN 1104.REVISED PER ECN 1105.
1011121314
REVISED PER ECN 1216.REVISED PER ECN 1217.REVISED PER ECN 1218.
GPGPGP
12-12-0212-12-0212-12-02
15 REVISED PER ECN 1251. GP 2-4-03
5119-00-01 (-03 SCHEMATIC) 15
MOTHER BOARD 1 ASSY, WITH RECORDER OPTION
IVY BIOMEDICAL SYSTEMS INC.11 BUSINESS PARK DRIVEBRANFORD, CT. 06405(203) 481-4183
C2 4Tuesday, March 08, 2005
Title
Size Document Number Rev
Date: Sheet of
D/A
V_SYNC-
H_SYNC-
MOVE-
Z_INT
R_ENABLE-
A
A
A
A
A
AA
A
A
A
A
A
A
A
A
A
A
A
A
AA
A
A
A
A
A
A
A
A
A
AA
A
A
A
AA
A
A
A
AA
AA
A
A
A
A
+8V
+5V
+8V
+5V
-8V
-8V-8V
+5V
+12V
+12V
+12V
+12V
+12V
+12X
+8V
-12V
-12V
-12V
-12V
-12V
-12V
-12V
+8V
+8V
-8V
+8V
-12V
+5V
-8V
+5V-8V
-8V
+12V
-12V
+-U16C
MC34004P10
98
R61
10K
-+U17D
MC34004P
1213
14
R10410K
D241N4148
R60200K
R10510K
R10652.3K
R6310K
R7424.9K
R6210K
+-U16D
MC34004P
1213
14
U11DDG201ACJ
16
14 15
-
+U17A
MC34004P32
1
411
U11ADG201ACJ
1
32
13
5
4 12
+
-U6
LM318
32
65
18
74
U11BDG201ACJ86 7
C38
.1UF MP
R19
100 OHM
U11CDG201ACJ
91110
C17
.1UFCER
D25
1N6263
D19
1N6263
R5910K
R73150K
C44
.01UF MP
R26
80.6K
R108
10K
RV3
20K TOPV. BAL.
-
+U17B
MC34004P
56
7
C42
.1UFCER
C41
.1UFCER
C18
.1UFCER
C15100PF
NPO
R10910K
R110162K
RV4
5K TOP"S"
R2815K
D11N6263
D21N4148
J202YOKE
12345
RV5
20K TOPH. GAIN
R279.09K
R2930.1K
R5
100 OHM1/2W 5%
RV6
5K TOPSYM.
C8.47UF
MP
R7010K
R6849.9K
-+U17C
MC34004P
109
8
RV9
50K TOP"RT. SIDE" TEXT
Q62N3903
13
2
D201N4148
Q52N3906
13
2
R6910K
R34.99K
R74.99K
R5810K
R6
27 OHM1/2W 5%
U7
LM31832
65
18
74
Q22N6490H.S.
32
1
Q12N6487
23
1
R20100 OHM
R4499 OHM
R8499 OHM
+ C9100UF25V
Q14PN4393
3
12
C21
.1UFCER
+
C7
100UF25V
R361K
C22
.1UFCER
U9LF351
32
1 5
6
74
R234.99K
C28
.1UFCER
C16
470PF NPO
C29
.1UFCER
R22806 OHM
RV2
1K TOPV. GAIN
R171 OHM5W 5%
C19100PF
NPO
R9470 OHM1/2W 10%
D41N4148
TP1VERT.
TP3Vi
D31N6263
R144.99K
TP6V SYNC______
R104.99KC24
220PFNPO
Q82N3903
13
2
R331K
Q72N3906
13
2
R32
3.32KQ92N3906
13
2
R11499 OHM
D13
1N4148
R15499 OHM
R342.21K
R16470 OHM1/2W 10%
R13100 OHM1/2W 5%
Q10
PN4393
3
12
R2110K
Q42N6490H.S.
32
1
Q32N6487H.S.
23
1
C25
.01UF MPD14
1N4148
+ C11100UF25V
+
C10100UF25V
R351K
TP2HORIZ.
C26
.1UFCER
H.S.
R12470 OHM
1/2W 10%
C27
.1UFCER
TP4Hi
R3080.6K
RV7
20K TOPH.CTR.
R5410K
R2415K
R5312.7K
C20
.001UF MP
R182.4 OHM5W 5%
TP8D/A
R25
9.09K
TP7VRAMP
RV1
5K TOPRASTER
TP22HRAMP
Q25PN4393
3
12
TP12MOVE____
R72200K
R135110K
D311N4148
Q16
PN4393
3
1 2
RV1650K TOPSLOW SWEEP ADJ.
U8B
MC34002P
75
6
Q15PN4393
3
12
-+U16A
MC34004P3
21
411
U8A
MC34002P
1
84
3
2
-+U16B
MC34004P
5
67
R67200K
D261N4148
D181N4148
C39
.1UFCER
C40
.1UFCER
R666.04K
R6549.9K
C37.1UF
CER
RV8
20K TOPD/A 0
R107
80.6K
RV1550K TOP
RAMP
R641.5K
C36
.1UFCER
C43
.1UFMP
R3720K
R562M
+
C33
6.8UFTANT
D17
1N4148
D161N4148
D27
1N4148
R57
1M
+ C356.8UF TANT
TP23
RASTER______
ENABLE______
R553.01K
TP13H SYNC______
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
TO SHT. 4
SHIELD_DRIVE
D S
G
J204-1
GUARD
D S
G
GUARD
D S
G
GUARD
J204-2
J204-3
SHIELD
G
S
D
G
S
D
D
S
G
ISOLATED
J201-24
TO SHT. 4
TO SHT. 4
TO SHT. 4
TO SHT. 4
TO SHT. 1
D S
G
D S
G
E
B
C
B
C
E
E
B
C
B
EC
E CB
B
C
E
E
B
C
EB
C
B
E
C
ECB
D
S
GNON-ISOLATED
S
S
D
D
G
G
TO SHT. 4
INSTALL R183FOR FILTER
OUT ONLY
DATEBYDESCRIPTIONREVREVISIONS
FORNEONATAL
INSTALL
INSTALLFORNEONATAL
DO NOT INSTALLFOR NEONATAL
01 REVISED FOR REV-01 ARTWORK FAB PER ECN 741. GP 11-26-97
NOTES:
1. ALL RESISTORS ARE 1/4W 1% U.O.S.
L1,LD3,Q48,R274,RN2,RV19,T1,TP43,U54,Y1.
2. LAST USED: C144,D73,F4,FB4,J207,JP5,
ADULT = /7MS NEONATAL = /4MS
GP 7-27-98REVISED PER ECN 804.02GP 7-27-9803 REFERENCE REJECTED ECR 803.GP 7-27-9804 REVISED PER ECN 805.
05 REVISED PER ECN 817. GP 8-5-9806 REVISED PER ECN 868. GP 1-25-9907 REVISED PER ECN 934. GP 4-12-9908 REVISED PER ECN 970. GP 8-6-9909 GP 11-20-00REVISED PER ECN 1052.
3. NOT USED: JP2,JP3,U19,U37,U50.
7-17-017-17-01
GPGP
REVISED PER ECN 1104.REVISED PER ECN 1105.
1011121314
REVISED PER ECN 1216.REVISED PER ECN 1217.REVISED PER ECN 1218.
GPGPGP
12-12-0212-12-0212-12-02
15 REVISED PER ECN 1251. GP 2-4-03
5119-00-01 (-03 SCHEMATIC) 15
MOTHER BOARD 1 ASSY, WITH RECORDER OPTION
IVY BIOMEDICAL SYSTEMS INC.
11 BUSINESS PARK DRIVEBRANFORD, CT. 06405(203) 481-4183
D
3 4Tuesday, March 08, 2005
Title
Size Document Number Rev
Date: Sheet of
RALALL
RA
LA
LL
LEADS_OFF
ECG
EVENT
L0
L1
NOTCH-
ECG_X1000
G1
G2
G4
16uSEC_SYNC
60/50
SAMPLE
70MS
T2
D
A
A
D
D
D
A
A
A
A
A
A
A
A
A
A
A
A
A
A
AA
A
A
AA
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
I
I
I
I
I I
I
I
I
I
II
I
I
I
I
II
I
II
II
II
I
I II
I
I
I
I
I
II
A
A
I
I
I
I
I
A
+6.5V+5V
+6.5V
+6.5V
+6.5V
+6.5V +5V
+5V
+12V
+5V
+5V
+12V
+6.5V
-8V
+5V
+5V
+5VI
+5VI
+5VI+5VI
+5VI+5VI +5VI
+5V
+5V
+6.5V
+8V
-6.5V
+6.5V
+5VI
+6.5V
+5VI
+12V+5V
-6.5V
-6.5V
-6.5V
-6.5V
-12V
-12V
-12V
-12V
-8V
-6.5V
-5VI
-5VI
-5VI
+5V
-6.5V
-6.5V
-6.5V
-12V
-6.5V
-6.5V
-12V
+8V
+8V
-8V
+5V
+5V
+5VI
-5VI
-8V
+6.5V
+12V
+6.5VI
-6.5VI
-6.5V
-8V
+5V
-8V
+5VI
+12V
-12V
+12V
+8V
+5VI
+5V
LD1NE2HC2A
C84.22UF MP
U42CNY17-3
21
45
C119
150PF NPO
R163100K
U43CNY17-3
21
45
R245
100K
C137220PF
NPO
R22410K
-
+U23A
TL034ACN3
21
411
R22510K
C78
.1UFCER
R22880.6K
U44AICM7556
6
3
5
1
2
4 14
7TR
CV
Q
DIS
THR
R V+
V-
+
-U47A
TL0621
84
3
2
Q43
PN4393
3
1 2
C77
.1UFCER
U44BICM7556
8
11
9
13
12
10
TR
CV
Q
DIS
THR
R
C132
.1UFCER
C116.1UF MP
C133
.1UFCER
D67FDH333
D66FDH333
R121
8.06K
R24650M 5%
R119
10K
R2261M
FB3150013
R23110K
R120
49.9K
FB2150013
R23010K
C139
.1UFCER
FB1150013
C140
.1UFCER
FB4150013
C123
.01UFMP
C144.01UF
CD
C1141UF MP
R118
49.9K
TP43
SHIELDDRIVE
R2594.75M
RV19200K TOP
RATE
+-U23C
TL034ACN
10
98
D72
1N4148
R27310K
REMOVE R273FOR FILTEROUT ONLY
R241
499K
D62
1N4148
R2661M
R27410K
D59
1N4148
C61
1UF MP
+-U46
LT1101CN86
381
27
54
TP37ISOL GND
J208X500
D56
1N4148
R155
100K
R232499K
J204
ECGINPUT
123456
-
+U26C
MC34004P
10
98
-
+U23D
TL034ACN
12
1314Q48
2N5116
D S
G2
13
R227
1M
+
-U47B
TL062
756
JP4
FILTEROUT
FILTERIN
R158
60.4K
D731N4148
D631N4148
R1542M
R24020K
R16616.9K
R23930.1K
R182
100K
R168
105K
R24810K 1W
10%
C92
.0047UF MP
RV12
20K TOPT'HOLD
C67
LD2NE2HC2A
R156200K
U30ACD4538B
2
145
3
6
7
16
8
RC
CX
+T-T
R
Q
Q
VD
VS
R235499K
R181
100 OHM
TP29X1000
U30BCD4538B
14
151211
13
10
9
RC
CX
+T-T
R
Q
Q
Q422N3903
13
2
R249100K
-+U23B
TL034ACN
5
67
C138220PF
NPO
D371N4148
R238
1K
C80.47UF MP
C91.033UF
MP
R177
221 OHM
+ C1316.8UF TANT
Q44
PN4393
3
1 2
R178
210K
C81
680PF NPO
R13730.1K
R18790.9K
RV13
200K TOP60 HZ ADJ.
R159
10K
R179
80.6K
D69FDH333
R160150K
C82.15UF MP
D68FDH333
R146100K
R180
33.2K
R25050M 5%
C71
.033UF 5% MP
R237100K
R138
12.7K
D55
1N4148
R148
178K
R161
3.24M
C98
.1UFCER
R1396.04K
C72
.033UF5% MP
+
-U54A
LT1058ACN32
1
411 D53
1N4148
D421N4148
C129
.1UFCER
R140
2.21K
R164
100K
C99.22UF MP
+
-U54C
LT1058ACN10
98
D54
1N4148
-+U26B
MC34004P
5
67
R141
1K
C130
.1UFCER
D44
1N4148
R220100K
+
-U54D
LT1058ACN12
1314
Q312N3903
1 3
2
R265
1M
R13630.1K
R19230.1K(ADULT)
(NEONATAL) 12.1K
R1624.99K
U41CNY17-3
21
45
RV14
200K TOP50 HZ ADJ.
R251
1M
C83.01UF MP
R247
1M
R197
10K
D431N4148
R145
100K
Q47
2N3903
13
2
Q30
PN4393 3
12
+C121100UF
25V
R26210K
D361N4148
+C120100UF
25V
R20910K
D481N5819
R215402K
R261
10K 1W10%
R21010K
D50
1N5819
+-U26A
MC34004P
3
21
411
C113.01UF
MP
LD3NE2HC2A
D51
1N5819
R214
90.9K
C94
.1UFCER
R260
100K
+
-U39D
MC34004P1213
14
C93
.1UFCER
C143220PF
NPO
R1981K
-
+U39C
MC34004P
109
8
C112
.01UF MP
R207121OHM
Q35
2N3903
13
2
Q45
PN4393
3
1 2
R213
20K
R208374 OHM
D70FDH333
D49
1N4148
R19510K
TP38-5VI
R196
3.32K
D71FDH333
R147
100K
R25850M 5%
TP36+5VI
+C10322UFTANT
R2061K
TP30NOTCH
R202100 OHM
R144
200K
R205
499 OHM
D60
1N4148
+C104100UF25V730MA
D351N4148
R201
499OHM
Q39
2N3906
13
2
D61
1N4148
R14310K
Q36
2N3903
13
2
+C115100UF
25V
Q412N39061
3
2
R21620K
R188330 OHM1/2W 10%
Q28
2N3906
13
2
R233150K
U45CD4052BE
1214151115246
109
13
3
1678
X0X1X2X3
Y0Y1Y2Y3INHAB
X
Y
VD
VE
VS
D52ICL8069CCZR
R134
10K
R23410K
R14233.2K
C122.1UF
CER
R16760.4K
R2111K
Q38
2N390313
2
C124.1UF CER
C65.1UF MP
C85
1UF MP
R212
499 OHM
R170301K
+C127470UF
25V
R264
100K
+C128470UF
25V
D571N4148
TP40+6.5V
-+U24D
MC34004P
12
1314
D581N4148
TP39-6.5V
-
+U24C
MC34004P
10
98
R2631M
R169100K
R267
10K
R171121K
D641N4148
T11029-00-10
1235
6
7 4
D401N6263
C86.022UF
MP
D651N4148
D451N4148
D411N6263
-
+U39B
MC34004P
5
67
Q37IRF522 1
32
C89
.01UFMP
R2032.21K
C126.01UF
MP
D46
1N4148
R243100K
U31ICM7555
2
5
3
7
6
41
8
TR
CV
Q
DIS
THR
RV
-
V+
R172
110KR17310K
C102.001UF
MP
R242100K
C90.022UF
MP
R1896.04K
Q32PN4393
3
21
R175
7.5K
U25DG508A 45671211109
15 16 1 82
1413
3
S1
S2
S3
S4
S5
S6
S7
S8
A2
A1
A0
AO
UT
EN
GNDV+
V-
R223
1K
R176
1M
R19910K
R2221K
Q27
PN4393 3
21
R20010K
Q26
PN4393 3
21
R126
649K (ADULT)130K (NEONATAL)
C66
.047UF MP
C101
150PFNPO
R127
100K
R185402K
R128
100K
R98
1M
Q23PN43933
1 2
D33
1N4148
R99
1M
C95.01UF
MP
D471N4148
L125UH
Q22PN4393
3
1 2
+
-U14A
TL0621
84
3
2
R16510K
RV17
20K TOPECG BAL
C125
1UFMP
+
-U14B
TL062
75
6
R256
402K
R129
1K
R18475K
R10110K
D321N4148
-
+U24A
MC34004P32
1
411
+-U54B
LT1058ACN5
67
R10210K
U38CNY17-3
21
45
R229
49.9K
+-U24B
MC34004P5
67
RV18100K TOP
ECGGAIN
R2361.5K
R257402K
C88
.1UFCER
TP2160/50
TP31T2
R1241.47M
R186162K
C87
.1UFCER
R100
10K
C142
470PFNPO
R20410K
C79
.001UFMP
Q46PN4393
3
12
-+U26D
MC34004P
12
1314
R183100K
R1311M
R157100K
U40IL300G
5
67
81
23
4
U20ICM7555
2
5
3
76
41
8
TR
CV
Q
DIS
THR
RV
-
V+
C691UF MP
R219
100OHM
C63.01UF
CD
TP35T1
R12349.9K
R21810K
Q402N39061
3
2
R130
10K
C64
.1UFCER
C141
1000PF NPO
R19410K
R255
100K
R217
499 OHM
C62.1UF MP
TP42X500
-
+U39A
MC34004P3
21
411
R133
10K
Q34
2N3903
13
2
R2541K
C118
.1UFCER
C70
.0047UF MP
R244
10K 1W10%
R122
301K
R19310K
R25321.5K
D341N4148
C117
.1UFCER
R13210K
R252
22.1OHM
+
C686.8UF
TANT
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
TO SHT. 3
J201-30
TO SHT. 1
TO SHT. 2
TO SHT. 2
TO SHT. 3
TO SHT. 3
J201-20
TO SHT. 3
J201-2
TO SHT. 2
J201-7
TO SHT. 3
GRAPH
TO SHT. 2
PB1PB2PB3PB4ALARM_ON/OFF2_MIN_PRCDRTEST-MENU
CHASSIS_GND
TO SHT. 2
TO SHT. 1
TO SHT. 1
TO SHT. 2
TO SHT. 1
TO SHT. 3
TO SHT. 1
TO SHT. 1
INSTALL WITHRECORDER OPTION
TO SHT.1
TO SHT. 1
RECORDER OPTIONINSTALL WITH
TO SHT. 3
DATEBYDESCRIPTIONREVREVISIONS
MOVE____
TRGPD0
TRGPD0
01 REVISED FOR REV-01 ARTWORK FAB PER ECN 741. GP 11-26-97
TO SHT. 1
GP 7-27-98REVISED PER ECN 804.02GP 7-27-9803 REFERENCE REJECTED ECR 803.GP 7-27-9804 REVISED PER ECN 805.
05 REVISED PER ECN 817. GP 8-5-9806 REVISED PER ECN 868. GP 1-25-9907 REVISED PER ECN 934. GP 4-12-9908 REVISED PER ECN 970. GP 8-6-99
TO SHT. 1J201-1
09 GP 11-20-00REVISED PER ECN 1052.
NOTES:
1. ALL RESISTORS ARE 1/4W 1% U.O.S.
L1,LD3,Q48,R274,RN2,RV19,T1,TP43,U54,Y1.
2. LAST USED: C144,D73,F4,FB4,J207,JP5,
3. NOT USED: JP2,JP3,U19,U37,U50.
7-17-017-17-01
GPGP
REVISED PER ECN 1104.REVISED PER ECN 1105.
1011121314
REVISED PER ECN 1216.REVISED PER ECN 1217.REVISED PER ECN 1218.
GPGPGP
12-12-0212-12-0212-12-02
15 REVISED PER ECN 1251. GP 2-4-03
5119-00-01 (-03 SCHEMATIC) 15
MOTHER BOARD 1 ASSY, WITH RECORDER OPTION
IVY BIOMEDICAL SYSTEMS INC.
11 BUSINESS PARK DRIVEBRANFORD, CT. 06405(203) 481-4183
D
4 4Tuesday, March 08, 2005
Title
Size Document Number Rev
Date: Sheet of
A0 D7D0 A1 D6D1 A2 D5D2 A3 D4D3 A4 D3D4 A5 D2D5 A6 D1D6 A7 D0D7 A8
A9RD- A10WRT-A0A1
CS55
D0 A0D1 A1D2 A2D3 A3D4 A4 CST02D5 A5
BEEP D6 A6HONK D7 A7VRTD A8
A9A10A11A12A13A14
WRT-RD-CSRAM
RDBK0 HONKRECSYNC/RDRDY/WRTRDY BEEP
D0D1D2D3D4D5 D0 A6D6 D1 A7D7 D2 A8
D3 A9RECWR D4 A0
/WRTRDY D5 A1D6 A2
RECRES D7 A3RECRD A4/RDRDY BREQ- A5
RECSYNC BACK-RDBK0 A11 D0 A0A0 A12 D1 A1A1 A13 D2 A2A2 A14 D3 A3A3 MREQ- A15 D4 A4A4 RD- D5 A5
WRT- RDY D6 A6 A15D7 A7 A14
A8 A13A9 A12A10 A11A11 A2
CLK A12 A1A13 A0
D1CSROM D0
A10 RD-
A0A1A2A3 D0
WRT- A4 D1 F7RD- A5 D2 F6
A6 D3 F5A7 D4 F4A8 D5 F3A9 D6 F2A10 D7 F1A11 F0A12
INT- A13NMI- A14
A15
D0BREQ- D1BACK- D2
D3D4D5D6D7
D0D1D2D3D4D5D6D7
A0A1
CS54
A[0..15]
D[0..7]
CS
RO
MF7
CS
RA
MF6
D7
CS
T02F5
D6
CS
54F4
D5
CS
55F3
D4
RE
CR
DF2
RE
CW
RF1 F0
BE
EP
HO
NK
VR
TD
RD
BK
0
/WR
TRD
Y/R
DR
DY
RE
CS
YN
CD
3D
2D
1D
0
L0L1
G1G2
G4
LEADS_OFF
T500
NOTCH-
ALERT_AUDIO
ECG_AUDIO
MOVE-
ECG
EVENT
D/A
V_SYNC-
ALERT_OUT
Z
TREND_INT
Z_INT
16uSEC_SYNC
H_SYNC-
R_ENABLE-
T150-
DELTRG
LNFREQ
60/50
+12VREC
AGND
SAMPLE
70MS
T2
TRGOUT
Z_GND
DD
D
D
D
A
A D
A
A
A
A
A
D
D
D
D
D
D
D
D
D
D
D
D
A
D
D
D
D
D
D
D
+5V
+5V
+5V
+5V+5V
+12V
+5V
+5V
+5V
+5V
+12V+5V +8V
+5V
+12VREC
+5V
+5V
-12V
-12V
-12V
+5V
+5V
+5V
+5V
+5V
+8V
+5V
+5V
U29MC1408-8N
56789
101112
133 2
116
4
14
15
A1A2A3A4A5A6A7A8
VC
CV
EE
GN
DRCCMP
IO
VREF+
VREF-
R15315K
R2693.32K
J203
182001
FRONTPANEL
123456789
1011121314
+10000UF 16V
C100
U2774HCT40105
45673219
13121110141516
8
D0
D1
D2
D3
SIN
DIR
OE
RS
T
Q0
Q1
Q2
Q3
DO
RS
O
VC
C
GND
U2874HCT40105
45673219
13121110141516
8
D0
D1
D2
D3
SIN
DIR
OE
RS
T
Q0
Q1
Q2
Q3
DO
RS
O
VC
C
GND
R151
4.99K
R149
100 OHM
R1174.99K
C73.1UF CER
RN110K
21
3 4 5 6 7 8 9 10
C97
.01UFCD
U22AMC34002P
1
84
3
2
U22B
MC34002P
75
6
U32N82C54-2
98765432
26272223
24
101312
181716211920
28
14
D0D1D2D3D4D5D6D7
RDWRA0A1
CS
CLK0G0OUT0
CLK1G1OUT1
CLK2G2OUT2
VCC
GND
U52HM62256LP-12
109876543252421232
2722
1112131516171819
20
261
2814
A0A1A2A3A4A5A6A7A8A9
A10A11A12
WEOE
D0D1D2D3D4D5D6D7
CS1
A13A14
VC
CG
ND
U21ADC0803
1817161514131211
1235
6
7
19
4
9
8
2010
DB0DB1DB2DB3DB4DB5DB6DB7
CSRDWRINTR
VI+
VI-
CLKR
CLK
VREF
AGND
VC
CD
GN
D
C134.1UF CER
U53MK48T02-12
87654321
2322
212018
171615141311109
2412
19
A0A1A2A3A4A5A6A7A8A9
W-G-E-
DQ7DQ6DQ5DQ4DQ3DQ2DQ1DQ0
VC
CG
ND
A10
SOCKET28 PIN
Y1MX045T2C8M7
14
8
GN
D+5V
DC FO OUTC74
.1UFCER
U49
2366-01-04FOR 101R2367-01-04FOR 101NR
(330043)
987654325242123226
2022271
1112131516171819
2814
10A1A2A3A4A5A6A7A8A9
A10A11A12A13
CEOE
PGMVPP
O0O1O2O3O4O5O6O7
VC
CG
ND
A0
R1163.01K
C60.001UF
MP
R103
4.99KQ242N3903
13
2
D30
1N4148
R714.99K JP1
TM
STD
U35Z84C1008
3938373635333231
171615
301114109
414240
8
754321444326252423222120192718
12
1334
D0D1D2D3D4D5D6D7
BUSREQBAIBAO
M1IORQMREQRDWR
INT/PULSEIEIIEO
CLK
A0A1A2A3A4A5A6A7A8A9
A10A11A12A13A14A15
RDYCE/WAIT
/RES
VC
CG
ND
U5171055C-10
343332313029282753698356
4321
403938371819202122232425
1415161713121110
267
D0D1D2D3D4D5D6D7
RDWRA0A1
RESETCS
PA0PA1PA2PA3PA4PA5PA6PA7
PB0PB1PB2PB3PB4PB5PB6PB7
PC0PC1PC2PC3PC4PC5PC6PC7
VC
CG
ND
C136
.1UFCER C105
.1UFCER
RN21K
21
3 4 5 6 7 8 9 10
D381N6263
D391N6263
C106.1UF
CER
C135.1UF
CER
R125
1K
TP34RESET_____
C111.1UF
CER
C57.1UF
CER
C110.1UF
CER
U48Z84C008
303132333435363738394012345
1415128791013
27
19202221
28
1824
161726
25236
1129
A0A1A2A3A4A5A6A7A8A9
A10A11A12A13A14A15
D0D1D2D3D4D5D6D7
M1
MREQIORQWRRD
REFSH
HALT
WAIT
INTNMI
RESET
BUSRQBUSAK
CLK
VC
CV
SS
C109.1UF
CER
C107
.1UFCER
C108.1UF
CER
GRG_GUUU36
2452-00-04(330093)
269797475
6735044
291
7010
5548
58 83 12 9 81 62 54 77 15 16 17 64 68 65 52 60 51 67
71
462018
40 41 39 37 36 33 30 23 14 24
4921
34
76 80 25 27 5
28
84 35
313263843536678
719324247597282
31
4
8
11
4556
57
61
63 22
A15A14A13A12A11
A1A0D1D0
/WRT/RD/MREQ/BACK
8MHZ22
FD7
FD6
FD5
FD4
FD3
FD2
FD1
FD0
DTA
D8
DTA
D7
/RD
FIF
/UN
LFIF
/ZO
UT
/VS
YN
CR
EIN
TEN
EV
NT
/MO
VE
25
/HSYNC
FLD21
BEEPOTHONKOT
CS
RO
MC
SR
AM
CS
T02
CS
54C
S55
RE
CR
DR
EC
WR
BE
EP
HO
NK
VR
TD
INTRPTNMI
ADCS
RD
BK
0R
DB
K1
/WR
TRD
Y/R
DR
DY
RE
CS
YN
C
EVENT
PIN
001
PIN
002
VCCVCCVCCVCCVCCVCCVCCVCC
GNDGNDGNDGNDGNDGNDGNDGND
/RD
Y
60HZ
LDOFF
/TM
OT
/4MS70MS
/10MS
A2 SAMPLE
C75680PFSM
R150475 OHM
RECORDER INTERFACEJ205
202002
123456789
10111213141516171819202122232425
26272829303132333435363738394041424344454647484950
1A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18A19A20A21A22A23A24A25A
1B2B3B4B5B6B7B8B9B
10B11B12B13B14B15B16B17B18B19B20B21B22B23B24B50B
R1744.75K
R9410K
U33MAX690CPA
4 6
2
1 5 7
3
8
PFI
WD
I
VCC
VO
PFO R
S
GND
VB
R9310K
Q29
2N3903
13
2 R115
20K
TP28EVENT
TP25DELTRG
TP33TRGPD0
TP27CLK
TP41INTR____
SOCKET44 PIN
TP26SAMPLE
SOCKET84 PIN
TP16Z
SOCKET28 PIN
U34B74HCT74
12
11
9
8
1013
14D
CLK
Q
Q
PR
CL
PG
TP3216US
C96.1UF
CER
R221
10K
Q332N3903
13
2
R19110K
U34A74HCT74
2
3
5
6
41
7
D
CLK
Q
Q
PR
CL
PG
U15LM318
3
265
18
74
R1529.09K
R270
150 OHM
R19049.9K
+ C766.8UFTANT
R268150 OHM