pen plotter · 2020. 6. 18. · contains the keys used for controlling the plotter’s operations...

PEN PLOTTER

SERVICE MANUAL

�

MP303 SERIES

MP303-UM251-02-9370

MP303-UM-251-9370 i

1. GENERAL DESCRIPTIONS

HISTORY OF REVISIONSNo. Date issued Description of revision Page Edition1 2004.05.21 First printing All 012 2004.12.01 Part numbers for the AC power cables corrected. 9-9 02

MP303-UM-251-9370 ii


CONTENTS

HISTORY OF REVISIONS ...................................................................................................... i

1. GENERAL DESCRIPTION .......................................................................1-1

1.1 Special Features ..................................................................................................... 1-1

1.2 Specifications ......................................................................................................... 1-2

1.3 External Dimensions .............................................................................................. 1-3

2. DESCRIPTION OF PARTS .......................................................................2-1

2.1 Description of Parts ................................................................................................ 2-1

2.2 The Control Panel ................................................................................................... 2-2

3. RECOMMENDED PARTS LIST ...............................................................3-1

4. REPLACING THE MECHANISMS ...........................................................4-1

4.1 Replacing the Rear Cover B .................................................................................. 4-1

4.2 Replacing the Right Cover ..................................................................................... 4-2

4.3 Replacing the Front Cover ..................................................................................... 4-3

4.4 Replacing the Top Left Cover ................................................................................ 4-4

4.5 Replacing the Bottom Left Cover .......................................................................... 4-5

4.6 Replacing the Y Motor Cover ................................................................................. 4-6

4.7 Replacing the Solenoid Cover ............................................................................... 4-7

4.8 Replacing the Y Bar Cover ..................................................................................... 4-8

4.9 Replacing the X Belts ............................................................................................. 4-9

4.10 Replacing the X Motor .......................................................................................... 4-10

4.11 Replacing the Y Bar .............................................................................................. 4-11

4.12 Replacing the Y Belt ............................................................................................. 4-12

4.13 Replacing the Y Motor .......................................................................................... 4-13

4.14 Replacing the Y FPC Cable .................................................................................. 4-14

4.15 Replacing the Pen Solenoid ................................................................................ 4-15

4.16 Removing the Bottom Panel Assembly .............................................................. 4-16

5. MECHANICAL ADJUSTMENTS ..............................................................5-1

5.1 Adjusting the X Belt Tension ................................................................................. 5-1

5.2 Adjusting the Y Belt Tension ................................................................................. 5-2

5.3 Adjusting the Y Bar Height .................................................................................... 5-3

MP303-UM-251-9370 iii


5.4 Checking the Perpendicularity Precision ............................................................. 5-4

5.5 Adjusting the Perpendicularity Precision ............................................................ 5-5

5.6 Adjusting the X Rollers .......................................................................................... 5-6

5.7 Adjusting the Pen Holder and Pivot Screws ........................................................ 5-7

5.8 Adjusting the Pen Holder Height ........................................................................... 5-8

5.9 Adjusting the Pen UP Spring ................................................................................. 5-9

5.10 Adjusting the X Home Position ........................................................................... 5-10

5.11 Adjusting the Y Home Position ........................................................................... 5-11

5.12 Adjusting Pen Retrieval ....................................................................................... 5-12

6. ELECTRICAL ADJUSTMENTS ................................................................6-1

6.1 Wiring Diagrams ..................................................................................................... 6-1

6.1.1 Component Layout on the Main Board .........................................................................6-2

6.2 DIP Switch Settings ................................................................................................ 6-3

6.3 Checking the Voltage Level for the Main Board .................................................. 6-4

6.4 Updating the System Firmware ............................................................................. 6-5

6.5 NOV-RAM Clear ....................................................................................................... 6-6

6.6 Adjusting the Pen Force ........................................................................................ 6-7

6.7 Using the Test Modes ............................................................................................. 6-8

6.7.1 Self Test ...........................................................................................................................6-8

6.7.2 Character Dump Mode ...................................................................................................6-9

6.7.3 Debug Mode ..................................................................................................................6-10

6.7.4 Pen Retrieval Test Mode ...............................................................................................6-11

6.7.5 Running Test Mode .......................................................................................................6-12

6.7.6 Sensor Test Mode .........................................................................................................6-13

6.7.7 Control Panel Key Test Mode ......................................................................................6-15

7. TROUBLESHOOTING ..............................................................................7-1

7.1 The Plotter is Turned On But Doesn’t Operate .................................................... 7-1

7.2 During Plotting Operations .................................................................................... 7-1

8. ERROR MESSAGES ................................................................................8-1

8.1 Hardware Error ........................................................................................................ 8-1

8.2 GP-GL Command Errors ........................................................................................ 8-1

8.3 HP-GL Command Errors ........................................................................................ 8-2

MP303-UM-251-9370 iv


9. DISASSEMBLY DIAGRAMS AND PARTS LISTS ...................................9-1

9.1 Main Unit .................................................................................................................. 9-1

9.2 External Casing ....................................................................................................... 9-2

9.3 Control Panel Section ............................................................................................ 9-3

9.4 Bottom Panel ........................................................................................................... 9-4

9.5 X-Axis Slider, X-Axis Drive, Pen Station ............................................................... 9-5

9.6 Y-Axis Slider, Y-Axis Drive ..................................................................................... 9-7

9.7 Standard Accessories ............................................................................................ 9-9

9.8 Others ...................................................................................................................... 9-9

10. CIRCUIT DIAGRAMS .............................................................................10-1

10.1 Main Board ............................................................................................................ 10-1

Main board (Top) ........................................................................................................................10-1

Main board (Connections) .........................................................................................................10-2

Main board (CPU) .......................................................................................................................10-3

Main board (DC Driver) ..............................................................................................................10-4

Main board (GRC1507 Servo) ...................................................................................................10-5

Main board (I/F) ..........................................................................................................................10-6

Main board (Memory) .................................................................................................................10-7

Main board (USB) .......................................................................................................................10-8

10.2 Control Panel ........................................................................................................ 10-9

10.3 Relay Board ......................................................................................................... 10-10

10.4 High Voltage Power Board ................................................................................. 10-11

MP303-UM-251-9370 1-1

1. GENERAL DESCRIPTION


1.1 Special Features

• High-speed, high-quality plotting

A digital servo drive system and a 32-bit CPU combine to produce detailed plots with smooth curves at a

maximum plotting speed of 700 mm/s (in all directions) and a mechanical resolution of 0.005 mm.

• Various functions ensure clearly-defined plots

A wide variety of functions come standard to ensure clearly-defined plots, including the Auto Pen Cap

function which prevents pens at the pen station from drying up when not in use and a mechanical soft-landing

mechanism that extends the pen's lifetime while providing a quieter working environment. The plotting speed

and pen force most suitable for the pen type being used can be easily selected from the control panel.

• Upright installation possible

To conserve space, the plotter can be mounted on a pair of stands (provided as a standard accessory) for

installation at a 60˚ angle.

• Interface conditions are easily set

The interface mode (RS-232C serial or Centronics parallel or USB-compatible) is automatically selected

when the plotter is connected to a computer via the respective interface connector.

If the plotter is set to Auto RS-232C mode, you just need to send plot data from the computer; the RS-232C

settings are automatically selected so no bothersome settings are required.

• Interactive operation

Various functions can be set interactively by using the panel keys according to messages and prompts

appearing on the display.

• Vector sorting function

This function speeds up plotting by minimizing the distance the pen travels in raised status from the end point

of one line to the starting point of the next line.

• Pen sorting function

To speed up plotting by reducing the number of pen exchanges required, this function reorganizes the

sequence in which plotting is performed so that each color is completely plotted before selecting the next

pen.

MP303-UM-251-9370 1-2


1.2 SpecificationsModel no. MP303-04CPU 32-bit CPUConfiguration Flatbed typeDrive system Digital servoEffective plotting area EXPAND : 432 x 297 mm (17.0 x 11.7 in)

ANSI B : 416 x 268 mm (16.3 x 10.5 in)ISO A3 : 404 x 285 mm (15.9 x 11.2 in)ISO A4 : 281 x 198 mm (11.1 x 7.8 in)

Maximum plot speed 70 cm/sMechanical resolution 0.005 mm (.0019 in)Programmable resolution GP-GL mode : 0.1/0.025 mm (.004/.001 in)

HP-GL mode : 0.025 mm (.001 in)No. of pens 8Compatible ink pen types Water based fiber-tip pens,

Disposable ink pens (0.2, 0.3, 0.5, 0.7 mm),Refillable ink pens (0.2, 0.3, 0.5 mm),Ceramic pens (0.2, 0.3, 0.5, 0.7 mm)

Chart hold method Electrostatic adhesionAccuracy Distance : within ±0.3% or ±0.1 mm, whichever is larger

Repeatability : within 0.1 mmPerpendicularity : within 1.0 mm/297 mmPen exchange : within 0.3 mm

Interfaces RS-232C/Centronics/USB1.1Command sets GP-GL (MP-GL and FP-GL)

HP-GL (HP7475 emulation)Display panel LCD (8 characters x 2 lines)Buffer memory 2 MbytesPower supply 100 to 240 VAC ±10% 50/60 HzPower consumption Within 45 VAOperating environment Temperature : +5˚C to +35˚C

Humidity : 35% to 75% RHExternal dimensions 670 mm (W) x 449 mm (D) x 130 mm (H)Weight Approx. 6.2 kg

MP303-UM-251-9370 1-3


1.3 External Dimensions

MP303-UM-251-9370 2-1

2. DESCRIPTION OF PARTS


2.1 Description of Parts

(1) Pen stationHolds pens ready for use and is numbered consecutively from pen 1 through pen 8, from the bottom to the top.

(2) Control panelContains the keys used for controlling the plotter’s operations and the lamps which indicate the current plotter status.

(3) Pen carriageHolds the currently selected pen.

(4) Y barThis sliding bar travels in the X-axis direction to move the pen carriage and enable plotting.

(5) Writing panelHolds the paper using an electrostatic adhesion panel.

(6) DisplayLiquid-crystal display allows functions to be set interactively.

(7) AC inletPlug the AC adapter into this AC line inlet.

(8) Power switchThis switch controls the ON/OFF status of the plotter’s power supply.

(9) RS-232C connectorTo use the RS-232C serial interface, connect your computer to the plotter via this connector.

(10) Centronics connectorTo use the Centronics-compatible parallel interface, connect your computer to the plotter via this connector.

(11) USB connectorTo use the USB interface, connect your computer to the plotter via this connector.

MP303-UM-251-9370 2-2


2.2 The Control Panel

Keys

POSITION ................. Move the pen carriage in the direction indicated by each key. These keys are also used to set functions at the display.

ENTER ...................... Completes input of the function being set.

PAUSE ...................... Press to temporarily stop plotting and press again to resume plotting.

CANCEL .................... To cancel a setting shown on the display, press this key instead of the ENTER key.

MODE ....................... Press to use the POSITION keys to move the pen carriage or to set function menus.

LEDs

CHART HOLD ........... Switches the ON/OFF status of electrostatic adhesion. After placing a sheet on the writing panel, press this key to secure the paper.

POWER/PROMPT .... Lights when the power is turned on. Flickers to prompt you to press the ENTER key or to inform you that an error has occurred.

PAUSE ...................... Lights to indicate that plotting is temporarily suspended.

MP303-UM-251-9370 3-1

2. Description of Parts

3. RECOMMENDED PARTS LISTNo. Part No. Part Name Description Quantity Remarks1 035130123 Electrostatic Panel 1 Compatible with MP53002 773513500 High Voltage Board 1 Compatible with MP53003 618260300 Control Panel PR312003 14 500051951 AC Adapter SA45-3129 15 771826500 Main Board 303 16 773513490 Control Board 1 Compatible with MP53007 691801540 Keyboard Flexible Printed Cable FPC,05412 1 Compatible with MP53008 509000014 X Motor TS3747N31ES 1 Compatible with MP53009 035132210 X Belt 1820 2 Compatible with MP530010 773513080 Relay Board PR05406 1 Compatible with MP530011 508000015 X Home Sensor GP1A53HR 1 Compatible with MP530012 508102285 Y Home Sensor SW,SPPB/TYPE1 1 Compatible with MP530013 691801520 X Flexible Printed Cable FPC,05410 1 Compatible with MP530014 795320716 Pen Station 1 Compatible with MP530015 035033051 Y Belt 1 Compatible with MP530016 509000015 Y Motor TS3747N32ES 1 Compatible with MP530017 773513100 Pen Holder Assembly 1 Compatible with MP530018 509000035 Solenoid 1 Compatible with MP530019 035134081 Y Roller 10B 3 Compatible with MP530020 035132070 Y Roller B 1 Compatible with MP530021 105401090 Pen Flexible Printed Cable FPC,05401 1 Compatible with MP5300

MP303-UM-251-9370 4-1

4. REPLACING THE MECHANISMS


4.1 Replacing the Rear Cover B

Disassembly(1) Move the Y bar next to the pen station as shown in Fig. 4-1.

Fig. 4-1

(2) Place the plotter upside down on a table or other flat surface as shown in Fig. 4-2, making sure not to strike the Y bar or pen block against the surface.

Fig. 4-2

(3) After removing the three M3 x 8 mm tapping screws and two M3 x 8 mm binding-head screws, remove the rear cover B (see Fig. 4-3).

Fig. 4-3

Re-assembly(4) Attach the rear cover B by performing the above “Disassembly” procedure in reverse.

Tightening torque: 4 kg / cm (M3 x 8 binding-head screws only)

MP303-UM-251-9370 4-2


4.2 Replacing the Right Cover

Disassembly(1) Loosen the three M3 x 8 mm tapping screws securing the right cover, then remove one M3 x 8 mm

binding-head screw from the rear cover B.(2) Remove the right cover while turning it slightly toward you (see Fig. 4-4) to release its three hooks (see

Fig. 4-5).

Fig. 4-4

Fig. 4-5

Re-assembly(3) To attach the right cover, insert its three hooks into the holes provided and then perform the above

“Disassembly” procedure in reverse.

MP303-UM-251-9370 4-3


4.3 Replacing the Front Cover

Disassembly(1) Remove the right cover.(2) Remove the three M3 x 8 mm tapping screws.(3) Slide off the front cover as shown in Fig. 4-6.

Fig. 4-6

Re-assembly(4) To attach the front cover, perform the above “Disassembly” procedure in reverse.

MP303-UM-251-9370 4-4


4.4 Replacing the Top Left Cover

Disassembly(1) Remove the black M3 x 12 mm tapping screw from the bottom of the top left cover (see Fig. 4-7).(2) Remove the two M3 x 8 mm tapping screws from the top of the top left cover (see Fig. 4-7).(3) Disconnect the flat cable, then remove the top left cover.

Top Left Cover

M3 x 12 mm tapping screw

M3 x 8 mmtapping screw

Fig. 4-7

Re-assembly(4) To attach the top left cover, perform the above “Disassembly” procedure in reverse.

MP303-UM-251-9370 4-5


4.5 Replacing the Bottom Left Cover

Disassembly(1) From the bottom panel, remove the six M3 x 8 mm tapping screws, and two black M3 x 5 mm tapping

screws (see Fig. 4-8).M3 x 5 tapping screwBottom panel

M3 x 8 tapping screw

Fig. 4-8

(2) Remove the one M3 x 8 mm tapping screw from the rear cover B, then remove the bottom left cover (see Fig. 4-9).


Bottom left cover

Fig. 4-9

Re-assembly

Caution: Be sure not to mix up the screws when replacing them.

Insertion of the wrong screws will damage the circuitry.

(3) To attach the bottom left cover, perform the above “Disassembly” procedure in reverse.

MP303-UM-251-9370 4-6


4.6 Replacing the Y Motor Cover

Disassembly(1) Remove the two black M3 x 12 mm binding-head screws, then remove the Y motor cover (see Fig.

4-10).

Y motor cover

Y bar

M3 x 12 mm binding head screw

Fig. 4-10

(2) To attach the Y motor cover, perform the above “Disassembly” procedure in reverse.

MP303-UM-251-9370 4-7


4.7 Replacing the Solenoid Cover

Disassembly(1) Remove the two M2 x 6 mm binding-head screws, then remove the solenoid cover (see Fig. 4-11).

Solenoid cover

Y bar


Fig. 4-11

(2) To attach the solenoid cover, perform the above “Disassembly” procedure in reverse.

Caution: Ensure that the solenoid cover does not contact the Y bar.

Fig. 4-12 shows an example of an incorrectly attached solenoid cover.

Y bar Solenoid cover

NG

Fig. 4-12

MP303-UM-251-9370 4-8


4.8 Replacing the Y Bar Cover

Disassembly(1) Place an A3 size sheet of paper on the plotter’s writing panel to avoid scratching it.(2) Remove the two black M3 x 12 mm tapping screws securing the Y bar cover (see Fig. 4-13), then

remove the Y bar cover.

M3 x 12 mm black tapping screw

Y bar

Fig. 4-13

Re-assembly(3) To attach the Y bar cover, perform the above “Disassembly” procedure in reverse.

MP303-UM-251-9370 4-9


4.9 Replacing the X Belts

After the X belts are replaced, the X belt tension and perpendicularity precision must be adjusted.

Disassembly(1) Remove the rear cover B, right cover, front cover, and top left cover.(2) Loosen the two M3 x 6 mm binding-head screws securing the tension bracket (see Fig. 4-14) to loosen

the X belt.(3) Remove the X belts.

Tension bracket18 to 20 mm

(Protruding length of X belt)

Fig. 4-14 Fig. 4-15

Re-assembly(4) Pull both ends of each X belt to the length indicated in Fig. 4-15.(5) Attach the X belts to the corresponding pulleys.(6) Adjust the X belt tension (see Section 5.1, “Adjusting the X Belt Tension”).(7) Adjust the perpendicularity precision (see Section 5.5, “Adjusting the Perpendicularity Precision”).

MP303-UM-251-9370 4-10


4.10 Replacing the X Motor

After the X motor is replaced, the X belt tension and perpendicularity precision must be adjusted.

Disassembly(1) Remove the X belts.(2) Remove the bottom panel assembly and bottom left cover.(3) Disconnect the X motor cable from the main driver board.(4) Loosen the two M3 x 4 mm double-point screws from the coupling of the M shaft (see Fig. 4-16).

X-motor

Coupling

M shaft

Double-point screw

Fig. 4-16

(5) Remove the two M3 x 6 mm binding-head screws securing the X motor, then slide off the X motor.(6) Remove the drive pulley from the X motor.

Re-assembly

Caution: The double-point screws in the X drive shaft’s coupling are easily breakable and should be tightened with care.

The tightening torque must not exceed 2 kg / cm.

(7) To mount the X motor, perform the above “Disassembly” procedure in reverse.(8) Mount the X belts.(9) Adjust the X belt tension (see Section 5.1, “Adjusting the X Belt Tension”).(10) Adjust the perpendicularity precision (see Section 5.5, “Adjusting the Perpendicularity Precision”).

MP303-UM-251-9370 4-11


4.11 Replacing the Y Bar

After the Y bar is replaced, the Y bar height, Y belt tension and perpendicularity precision must be adjusted.

Disassembly(1) Remove the Y motor cover.(2) Remove the Y bar cover.(3) Loosen the two black M3 x 4 mm binding-head screws securing the Y pulley bracket (see Fig. 4-17).

Y bar cover


Fig. 4-17

(4) Remove the rubber holder securing the pen FPC (Flexible Printed-Circuit) cable to the X roller bracket, then disconnect the Y FPC cable from the relay board and separate it from the X slider.

(5) Remove the Y belt (see Section 4.12, “Replacing the Y Belt”).(6) Remove the two M3 x 12 mm tapping screws securing the Y bar to the X slider, then remove the Y bar (see

Fig. 4-18).

Rubber holder

M3 x 12 mmtapping screw

Fig. 4-18

(7) Slide the pen block assembly off the Y bar.(8) Slowly peel the Y FPC cable off the Y bar, being careful not to damage the cable.

Re-assembly(9) To mount the Y bar, perform the above “Disassembly” procedure in reverse.(10) Adjust the Y bar height (see Section 5.3, “Adjusting the Y Bar Height”) so that the gap between the Y

bar and X rail is about 11.6 mm.(11) Adjust the perpendicularity precision (see Section 5.5, “Adjusting the Perpendicularity Precision”).(12) Adjust the Y belt tension (see Section 5.2, “Adjusting the Y Belt Tension”).

MP303-UM-251-9370 4-12


4.12 Replacing the Y Belt

After the Y belt is replaced, the Y belt tension and X rollers must be adjusted.

Disassembly(1) Loosen the M3 x 6 mm tapping screw at the X roller adjustment bracket (see Fig. 4-19).(2) Remove the two black M3 x 4 mm binding-head screws securing the Y pulley bracket, then remove the

Y pulley bracket.(3) While slightly raising the Y bar toward you, slide the Y slider assembly off the Y bar (making sure not to

damage the Y FPC cable).(4) Remove the Y belt from the Y slider (see Fig. 4-20).

Y bar

Y belt

Y slider

X slider

X roller adjustment bracket

Fig. 4-19 Fig. 4-20

Re-assembly(5) Attach the Y belt to the Y slider.(6) Mount the Y slider and Y pulley bracket onto the Y bar.(7) Adjust the Y belt tension (see Section 5.2, “Adjusting the Y Belt Tension”).(8) Attach the Y bar cover.(9) Adjust the X rollers (see Section 5.6, “Adjusting the X Rollers”).

Note: Check the Y FPC cable to ensure that it is undamaged.

MP303-UM-251-9370 4-13


4.13 Replacing the Y Motor

After the Y motor is replaced, the X rollers, X belt tension, and Y belt tension must be adjusted. Next, run the pen retrieval test to check that pens are properly exchanged.

Disassembly(1) Remove the rear cover B and Y motor cover.(2) Remove the relay board, then disconnect the Y motor cable from the relay board.(3) Remove the top left cover, then push the X slider as far as possible in the -X axis direction (near the pen

station).(4) Remove the Y bar cover.(5) Remove the X belt closer to the back of the plotter.(6) Loosen the Y belt.(7) Remove the two M3 x 6 mm tapping screws securing the X roller adjustment bracket assembly, remove

the X roller adjustment bracket assembly (see Fig. 4-21), then shift the entire Y bar assembly in the +Y direction.

Note: Be careful not to scratch the X rail.

X roller adjustment bracket

Y barX slider

Fig. 4-21

(8) Remove the two M3 x 6 mm binding-head screws securing the Y motor, then remove the Y motor.(9) Remove the Y drive pulley from the Y motor.

Re-assembly(10) To mount the Y motor, perform the above “Disassembly’’ procedure in reverse.(11) Adjust the X rollers (see Section 5.6, “Adjusting the X Rollers”).(12) Adjust the Y belt tension (see Section 5.2, “Adjusting the Y Belt Tension’).(13) Adjust the X belt tension (see Section 5.1, “Adjusting the X Belt Tension”).(14) Run the pen retrieval test to check that pens are properly exchanged (see Section 6.7 , “The Test

Modes”).

MP303-UM-251-9370 4-14


4.14 Replacing the Y FPC Cable

After the Y motor is replaced, the Y bar height and perpendicularity precision must be adjusted.

Disassembly(1) Disconnect the Y FPC cable from connector J2 on the relay board.(2) Remove the Y bar.(3) Remove the M2 x 6 mm binding-head screw securing the Y FPC cable to the Y slider (see Fig. 4-22),

then use a soldering iron to detach the pen solenoid’s lead wires from the Y FPC cable.

Y sliderY FPC cable

Fig. 4-22

(4) Slide the Y slider assembly off the Y bar.(5) Remove the Y FPC holder bracket (which is secured by black adhesive).(6) Peel the Y FPC cable off the Y bar.

Re-assembly(7) Fold the Y FPC cable as shown in Fig. 4-23, and wrap a piece of filament tape (about 25 mm long)

around the folded section. Attach the Y FPC cable to the Y bar with double-sided tape as shown in Fig. 4-24. To prevent the folded section of the Y FPC cable from lifting up, attach a piece of filament tape as shown in Fig. 4-25.

15 mm

Fold here

Fold here

15 mm

5 to 8 mm

Fig. 4-23

Fig. 4-24 Fig. 4-25

About

25 mm

Wrap with filament tape

Black line

Range of double-sided tape

Y FPC cable

Y bar

Align the double-sided tape’s edge

with the Y bar’s edge

Filament tape

Wrap filament tape around the section indicated above

(8) Process the Y FPC cable as shown in Fig. 4-26.

MP303-UM-251-9370 4-15


90˚

Align the FPC cable’s edge with the top of the rib

+20

Apply adhesive to inside of bracket

The cable should contact the pins at the circuit board’s edge

* Make sure the Y FPC holder is not loose or tilted.

Fig. 4-26

(9) To mount the Y FPC cable, perform the preceding “Disassembly” procedure in reverse.(10) Adjust the Y bar height (see Section 5.3, “Adjusting the Y Bar Height’).(11) Adjust the perpendicularity precision (see Section 5.5, “Adjusting the Perpendicularity Precision”).

4.15 Replacing the Pen Solenoid

After the pen solenoid is replaced, the pen force must be adjusted.

Disassembly(1) Remove the solenoid cover.(2) Remove the M2 x 6 mm binding-head screw securing the Y FPC cable to the Y slider.(3) Remove the two M3 x 6 mm binding-head screws securing the pen solenoid to the Y slider (see Fig.

4-27).

M3 x 6 mmbinding head screw

Pen solenoid

Fig. 4-27

(4) Use a soldering iron to remove the solder between the Y FPC cable and the pen solenoid, then remove the pen solenoid.

Re-assembly(5) To mount the pen solenoid, perform the above “Disassembly” procedure in reverse.(6) Adjust the pen force (see Section 6.6, “Adjusting the Pen Force”).

MP303-UM-251-9370 4-16


4.16 Removing the Bottom Panel Assembly

Disassembly(1) Push the Y bar next to the pen station as shown in Fig. 4-28.

Fig. 4-28

(2) Place the plotter upside down on a table or other flat surface as shown in Fig. 4-29, making sure not to strike the Y bar or pen block against the surface.

(3) Remove the six M3 x 8 mm tapping screws and two M3 x 5 mm tapping screws securing the bottom panel assembly (see Fig. 4-29), then remove the bottom panel assembly.

Caution: Be sure not to mix up the screws when replacing them.

Insertion of the wrong screws will damage the circuitry.

M3 x 5 tapping screwBottom panel


Fig. 4-29

(4) Disconnect all the FPC cables, connector cables, etc. from the main board.

MP303-UM-251-9370 5-1

5. MECHANICAL ADJUSTMENTS


5.1 Adjusting the X Belt Tension

(1) Remove the rear cover B, right cover, and front cover.

(2) Push the Y bar to the left next to the pen station.

(3) Remove the two black M3 x 12 mm binding-head screws from the Y motor cover and insert one into each

tension bracket as shown in Fig. 5-1. Next, loosen the two M3 x 6 mm binding-head screws (with plain

washer) at each tension bracket by about a half turn.

(4) To adjust the X belt tension, adjust the position of the tension brackets using the screws added in Step (3)

so that, when a tension gauge (150 g maximum) is used to cause a 10 mm displacement in the X belt at

the position indicated in Fig. 5-2, the force becomes 100 g (±20 g).

Insert here: M3 x 12 mmbinding head screw

Tension bracket

Fig. 5-1

277 mm

Tension pulleyAdhesive

10 m

m

Fig. 5-2

(5) After adjustment is completed, tighten the two M3 x 6 mm binding head screws (with plain washer) at

each tension bracket and secure them with adhesive, then remove the M3 x 12 mm binding head screw

inserted in each tension bracket in Step (3) and replace them in the Y motor cover.

(6) Attach the rear cover B, right cover, and front cover.

MP303-UM-251-9370 5-2


5.2 Adjusting the Y Belt Tension

(1) Remove the Y bar cover.

(2) Loosen the two M3 x 4 mm binding-head screws securing the Y pulley bracket by about a half turn (see

Fig. 5-3).

(3) To adjust the Y belt tension, pull the Y pulley bracket using a push-pull gauge and then tighten the screws

loosened in Step (2) at the point where the pull force becomes 1000 g (±100 g).

Y bar

Y bar cover

M3 x 4 mm binding head screws

Fig. 5-3

(4) Attach the Y bar cover.

MP303-UM-251-9370 5-3


5.3 Adjusting the Y Bar Height

After the Y bar height is adjusted, the perpendicularity precision must be adjusted.

(1) Loosen the two M3 x 12 mm tapping screws securing the X slider to the Y bar as shown in Fig. 5-4.

(2) Adjust the gap between the Y bar and X slider to about 11.6 mm, then tighten the two screws loosened in

Step (1) while making sure that the Y bar is not tilted.

Fig. 5-4

(3) Adjust the perpendicularity precision (see Section 5.5, “Adjusting the Perpendicularity Precision”).

MP303-UM-251-9370 5-4


5.4 Checking the Perpendicularity Precision

(1) Attach a 0.2 mm ceramic pen and load a sheet of thin paper.

(2) Lower the pen and use the POSITION keys to manually plot the quadrilateral shape shown in Fig. 5-5.

(3) As shown in Fig. 5-6, fold the sheet in half so that the X-axis lines overlap.

Check the perpendicularity precision based on whether or not Line B deviates from Line A.

Line

A

Line

B

Line

A

Line

B

Align both lines

Fig. 5-5 Fig. 5-6

(4) If Line B deviates from Line A when the paper is folded so that both X-axis lines overlap (see Fig. 5-7),

tilt the Y bar toward Line B at half the angle of such deviation.

Line

B

Line

A

Fig. 5-7

MP303-UM-251-9370 5-5


5.5 Adjusting the Perpendicularity Precision

After the perpendicularity precision is adjusted, the X rollers must be adjusted.

(1) Remove the Y motor cover and rear cover B.

(2) Remove the top left cover, then loosen the two M3 x 4 mm double-point screws in the coupling (see Fig.

5-8) to free the M shaft.

X motor

Fig. 5-8 Fig. 5-9

Coupling

M shaft

Double-point screw

(3) Loosen the two M4 x 6 mm toothed binding head screws securing the X roller bracket to the X slider (see

Fig. 5-10).

M4 x 6 mm toothed binding-head screws

Fig. 5-10

(4) Slide the Y bar assembly so that it is parallel to the right edge of the writing panel, then tighten the two

M4 x 6 mm toothed binding head screws.

(5) Adjust the X rollers (see Section 5.6, “Adjusting the X Rollers”).

(6) Tighten the two M3 x 4 mm double-point screws in the coupling, making sure that the torque does not

exceed 2 kg/cm.

(7) Check the perpendicularity precision (see Section 5.4, “Checking the Perpendicularity Precision”).

If the perpendicularity precision is unsatisfactory, repeat Steps (2) and (3) above and finely adjust the

position of the Y bar assembly in the direction of deviation, repeat Steps (5) and (6), then check the

perpendicularity precision again. When the precision is satisfactory, proceed to Step (8) below.

(8) Attach the Y motor cover and rear cover B.

(9) Attach the top left cover.

MP303-UM-251-9370 5-6


5.6 Adjusting the X Rollers

(1) Remove the Y motor cover and rear cover B.

(2) Loosen the two M3 x 6 mm tapping screws securing the X roller adjustment bracket.

(3) While pulling the X roller adjustment bracket and X slider by a pull force of about 600 to 700 g in the

directions shown in Fig. 5-11, adjust the pressure exerted by the X rollers. Tighten the two M3 x 6 mm

tapping screws.

Manually turn the X slider’s rollers one at a time to check that all rollers exert the same pressure. If

pressure is uneven, adjust the perpendicularity precision (see Section 5.5, “Adjusting the Perpendicularity

Precision”).

Fig. 5-11

(4) Attach the Y motor cover and rear cover B.

MP303-UM-251-9370 5-7


5.7 Adjusting the Pen Holder and Pivot Screws

After the pen holder and pivot screws are adjusted, the Y belt tension must be adjusted.

(1) Remove the solenoid cover.

(2) Remove the Y bar cover and Y pulley bracket, then remove the Y slider assembly from the Y bar by

sliding it in the -Y direction.

(3) As shown in Fig. 5-13, turn the pivots to adjust both gaps between the pen holder and Y slider to the

same distance (about 2 mm).

Apply adhesive

Apply adhesive

Pivot screw

Pen holder

Tightening torque:50 to 70 gf/cm

2 m

m

2 mm 2 mm

Fig. 5-12 Fig. 5-13

(4) Check that there is no play in the pen holder.

(5) Remove the pen UP spring, manually raise the pen holder, then check that the pen holder lowers

smoothly when released (see Fig. 5-14).

When the pen holder is released

If the pen holder doesn’t lower completely, loosen the pivot screw

Fig. 5-14

(6) Tighten the nut of each pivot screw, then secure the screws with adhesive.

(7) Slide the Y slider assembly onto the Y bar and attach it.

(8) Attach the solenoid cover and Y pulley bracket.

(9) Adjust the Y belt tension (see Section 5.2, “Adjusting the Y Belt Tension”).

(10) Attach the Y bar cover.

MP303-UM-251-9370 5-8


5.8 Adjusting the Pen Holder Height

(1) Attach a pen to the pen holder and raise the pen.

(2) Use the M3 x 4 mm hexagonal adjustment screw to adjust distance A between the raised pen’s tip and

writing panel surface to 1.8 mm minimum (2.6 mm maximum).

Be sure to measure the minimum and maximum distances throughout the entire writing panel’s surface.

Pen holder

A

Adhesive

Adjustment screw

Top surface of the writing panel

Fig. 5-15

(3) When adjustment is completed, apply adhesive to the adjustment screw.

MP303-UM-251-9370 5-9


5.9 Adjusting the Pen UP Spring

After the pen UP spring is adjusted, the pen force must be adjusted.

(1) Remove the solenoid cover.

(2) Attach a pencil plunger to the pen holder.

(3) Lower the pencil plunger slightly (0.5 to 1.0 mm) below the pen UP position, and temporarily loosen the

pen force adjustment screw at that position.

(4) Gradually tighten the pen force adjustment screw until the pencil plunger reaches the pen UP position,

then apply adhesive to the pen force adjustment screw as shown in Fig. 5-16.

Apply adhesive here

Fig. 5-16

(5) Attach the solenoid cover.

(6) Adjust the pen force (see Section 6.6, “Adjusting the Pen Force”).

MP303-UM-251-9370 5-10


5.10 Adjusting the X Home Position

(1) Remove the top left cover.

(2) Loosen the two M3 x 6 mm binding head screws (with plain washer).

(3) Adjust the X home position by sliding the X limiter bracket in the directions shown in Fig. 5-17.

Fig. 5-17


MP303-UM-251-9370 5-11


5.11 Adjusting the Y Home Position

(1) Adjust the Y home position by turning the M3 x 6 mm hexagonal bolt as shown in Fig. 5-18, then apply

adhesive to that bolt.

Adhesive

3.9

mm

Fig. 5-18

MP303-UM-251-9370 5-12


5.12 Adjusting Pen Retrieval

Before attempting to adjust pen retrieval, check the perpendicularity precision (see Section 5.4, “Checking

the Perpendicularity Precision”) and adjust it if necessary (see Section 5.5, “Adjusting the Perpendicularity

Precision”).

(1) Remove the top left cover.

(2) If the Y bar is not parallel to the pen station, move the Y bar so that it is parallel.

(3) Set the plotter to pen retrieval test mode by holding down the LEFT ARROW (-X) and DOWN ARROW (-Y)

POSITION keys while turning on the plotter.

(4) Adjust the X and Y home positions (see Sections 5.10, “Adjusting the X Home Position,” and 5.11,

“Adjusting the Y Home Position”) to positions where the pen retrieval test can be enabled.

(5) Mount disposable ink pens in Positions 1 to 8 of the pen station.

(6) Press the ENTER key to start the pen retrieval test and check the following points:

• The ink pen plunger does not contact the pen holder.

• The pen tip does not touch the pen cap (see Fig. 5-19). If the pen tip touches the pen cap, loosen the

two M3 x 12 mm tapping screws, raise the pen station and then tighten the two screws. If raising the

pen station does not solve the problem, add a plain washer of 3 mm diameter and 0.5 mm thickness

beneath the pen station mounting bracket (see Fig. 5-20).

Incorrect Correct

Fig. 5-19 Fig. 5-20

Add the washer here

Note: Execution of the pen retrieval test can be temporarily suspended by pressing the PAUSE

or ENTER key. To resume test execution, press the PAUSE or ENTER key


MP303-UM-251-9370 5-13


MP303-UM-251-9370 6-1

6. ELECTRICAL ADJUSTMENTS


6.1 Wiring Diagrams

1

Y M

OT

OR

92

13

-5

4A

S

2Y

HO

ME

SE

NS

OR

SO

LEN

OID

J119

-190

FP

C, 0

5401

CA

, 054

05

PR

, 054

06A

FP

C, 0

5410

AS

SY

: C

A, 0

5410

JOIN

T B

OA

RD

J1

J2J3

X M

OT

OR

J8 RS

-232

C

J7

J2J6

J5

J3

J4 J9

J11

J1

SW

2

SJ-

W2R

4A-3

0BB

CA

, 054

06A

PR

, 054

07

PR

3120

03

WR

ITIN

G P

AN

EL

CA

3120

01

CE

NT

RO

NIC

S

J10

US

B

PR

3120

0AM

AIN

BO

AR

D

DE

BU

G B

OA

RD

LCD

KE

Y B

OA

RD

HIG

H V

OLT

AG

EB

OA

RD

AC

AD

AP

TE

R

MP303-UM-251-9370 6-2


6.1.1 Component Layout on the Main Board

J9

J8

J7

J10

J6

J2

J5

J4

J1

J11

J8

SW2

TP3

JP3

JP2

SW1

TP3

VR1

TP1 (24V)

TP2 (12V)

JP6

JP4

JP5

MP303-UM-251-9370 6-3


6.2 DIP Switch Settings

Factory presets (Normal Mode)

OFF

ON

1 2 3 4

SW1

NOV-RAM Clear mode

OFF

ON

1 2 3 4

SW1

Sensor test mode

OFF

ON

1 2 3 4

SW1

Control panel key test mode

OFF

ON

1 2 3 4

SW1

MP303-UM-251-9370 6-4


6.3 Checking the Voltage Level for the Main Board

(1) Remove the bottom panel assembly and top left cover.

(2) Connect all cables to the main board as shown in Fig. 6-1 below except for connector J4 that connects to

the electrostatic adhesion circuit board.

Fig. 6-1

(3) Connect the AC adapter to the main board.

(4) Turn on the power switch and then check the voltage levels.

(5) You will find test pins (TP1 through TP4) on the main board. The output voltage levels of these pins are

given in the table below.Test pin

Output voltage Permissible rangeNo. NameTP1 +24V +24V +22.5V to +25.5VTP2 +12V +12V +11.5V to 12.5VTP3 GND 0VTP4 VCC +5V +4.9V to +5.1V

MP303-UM-251-9370 6-5


6.4 Updating the System Firmware

To update the system firmware you need to have the following files. In addition, you need to use a computer

and Centronics cable.

• MP303.X : MP303-04 firmware

• SEND.EXE : Utility to transfer files using Windows

• SENDB.EXE : Utility to transfer files using DOS

How to update the system firmware

(1) Connect the computer and the MP303-04 via the Centronics interface.

(2) Turn on the power while pressing the RIGHT ARROW POSITION key and the LEFT ARROW POSITION

key, and then press the ENTER key to display the menu shown below.

UPDATE? NO

(3) Select “YES” using the UP ARROW POSITION key or the DOWN ARROW POSITION key to display the

menu shown below.

CENTROGET-ACK

This enables you to select the timing of the Centronics interface.

Normally, there is no need to change this setting. If you cannot transfer data correctly via the Centronics

interface, use the UP ARROW POSITION key or the DOWN ARROW POSITION key to change this

timing.

(4) Press the ENTER key to display the menu shown below.

PLEASE SEND

(5) Send firmware to the plotter from the computer.

Drag and drop the firmware file onto the SEND.EXE icon when using Windows. For DOS mode, use

SENDB.EXE as shown below.

>SENDB MP303.X

(6) The following menu is displayed while data is being received.

**KBRECEIVED

(7) The plotter will start the initialization routine when all the data has been received. The firmware versions

are displayed during the initialization routine. Check the firmware version that you updated.

(8) Turn off the power.

(9) Perform the NOV-RAM clear operation whenever you replace the main board.

MP303-UM-251-9370 6-6


6.5 NOV-RAM Clear

When you replace the main board, you must clear the Non-Volatile RAM (NOV-RAM).

If you clear the Non-Volatile RAM, you will lose the setup parameters.

How to clear the Non-Volatile RAM

(1) Set SW1 to the NOV-RAM Clear mode as shown below.

OFF

ON

1 2 3 4

SW1

(2) Turn on the power to the plotter.

(3) The NV RAM CLEAR menu appears. The plotter immediately starts to clear the parameters on the NOV-

RAM, and then sets the default values.

NV RAM CLEAR

(4) When Non-Volatile RAM clearing is complete, the NV RAM OK! menu appears.

NV RAM OK!

(5) Turn off the power to the plotter.

(6) Return the SW1 setting to normal mode as shown below.

OFF

ON

1 2 3 4

SW1

(7) Turn on the power to the plotter.

The SET MODE menu appears. (This menu appears when you clear the Non-Volatile RAM)

SET MODESTD 1.00

(8) Select “STD” for the standard model using the LEFT ARROW POSITION key or RIGHT ARROW

POSITION key.

(9) Press the ENTER key to store the setting.

(10) Turn off the power to the plotter.

MP303-UM-251-9370 6-7


6.6 Adjusting the Pen Force

Place the plotter on a horizontal surface such as a table.

(1) Mount a ceramic pen in position No.1 of the pen station and then load a sheet of paper.

(2) Press the PAUSE key to retrieve the ceramic pen, then lower the pen by following the displayed menu.

(3) Press the MODE key, and then press the UP ARROW POSITION key or DOWN ARROW POSITION key

until the menu shown below appears.

PEN TYPECeramic

(4) Select “PEN TYPE Ceramic” by pressing the LEFT ARROW POSITION key or RIGHT ARROW

POSITION key. This selection enables you to measure the pen force using the low pen force mode.

(5) Raise the pen using a 50 g dial tension gauge, then measure the pen force at the point when the pen tip

separates from the paper.

Press the UP ARROW POSITION key or DOWN ARROW POSITION key until the menu shown below

appears.

PenUp Down

Press the LEFT ARROW POSITION key or RIGHT ARROW POSITION key to raise or lower the pen.

(6) Adjust the pen force using VR1 so that it is within the range of 20 to 33 g in the low pen force mode.

There is a hole for maintenance use on the lower left of the cover. You can turn VR1 from this hole.

(7) Raise and lower the pen two or three times to get the correct pen force.

(8) Press the MODE key, and then press the UP ARROW POSITION key or DOWN ARROW POSITION key

until the menu shown below appears.

PEN TYPEW.Fiber

(9) Select “PEN TYPE W.Fiber” by pressing the LEFT ARROW POSITION key or RIGHT ARROW

POSITION key. This selection enables you to measure the pen force using the high pen force mode.

(10) Raise the pen using a 50 g dial tension gauge, then measure the pen force at the point when the pen tip

separates from the paper.

Press the UP ARROW POSITION key or DOWN ARROW POSITION key until the menu shown below

appears.

PenUp Down

Press the LEFT ARROW POSITION key or RIGHT ARROW POSITION key to raise or lower the pen.

(11) Adjust the pen force using VR1 so that it is within the range of 35 g to 50 g in the high pen force mode.

(12) Raise and lower the pen two or three times to get the correct pen force.

Pen ForceTarget Pen Force Pen Type

Low Pen Force 25 g (20 to 33 g) CeramicHigh Pen Force 40 g (35 to 50 g) W.Fiber

MP303-UM-251-9370 6-8


6.7 Using the Test Modes

6.7.1 Self Test

Your plotter comes with a self-test mode, which enables the plotter to check its own functions, without

necessarily being connected to the computer.

A correctly drawn test pattern signifies that all of the functions of the plotter (excluding the interface functions)

have been tested and found normal. Be sure to run this self-test before connecting the plotter to the

computer.

Procedure

(1) Check that the POWER switch is off and that pens are mounted in the pen station.

(2) Turn on the POWER switch while holding down the LEFT ARROW POSITION key.

The plotter is initialized.

The prompts below are consecutively displayed.

SelfTest Mode

Set Paper!

(3) After initialization has been completed, place a sheet of paper on the writing panel.

Press the CHART HOLD key to secure the sheet. The prompt below is displayed.

PressEnt key

(4) Press the ENTER key to draw the self-test pattern.

The plotter repeatedly plots the same pattern until you cancel the self-test mode.

To temporarily stop plotting, press the PAUSE key.

To cancel the self-test mode, press the CANCEL key to stop plotting and then turn off the plotter.

MP303-UM-251-9370 6-9


6.7.2 Character Dump Mode

This mode allows experienced users to detect the cause of communication problems between the plotter

and the computer. In Character Dump mode, the plotter produces an exact printout of the codes it receives,

printing character data as ASCII codes and the non-character (control) data as two-digit hexadecimal values

(e.g., 0A: Line Feed, 0D: Carriage Return).

Procedure

(1) Mount a pen in the pen station’s Pen 1 position.

(2) Place a sheet of paper on the writing panel.

(3) Hold down the DOWN ARROW POSITION key while you turn on the plotter.


CharDump Mode

(4) Secure the paper.

The prompt below is displayed to prompt you to press the CHART HOLD key.

Set Paper!

(5) Once the paper is secured, the PROMPT lamp on the plotter blinks.

The prompt below is displayed.

PressENT Key

(6) Press the ENTER key to enter the Character Dump Mode.

The plotter prints “** DUMP MODE (V*.** GL) **” on the paper and then awaits data from the computer.

The message below briefly reappears on the display.

CharDump Mode

(7) When the computer runs an application program and outputs the data to the plotter, it starts printing the

received data in ASCII format.

(8) To exit the Character Dump Mode, turn off the plotter and then turn it back on using only the POWER

switch.

MP303-UM-251-9370 6-10


6.7.3 Debug Mode

This mode is used to locate programming errors in your application program.

When the plotter is in Debug Mode, its buffer size is reduced to permit easier detection of the section of the

program that is causing the plotting error.

Procedure

(1) Mount a pen in the pen station’s Pen 1 position.


(3) Hold down the ENTER key while you turn on the plotter.


Debug Mode

(4) Secure the paper.

The prompt below is displayed for a few seconds to prompt you to press the CHART HOLD key.

Set Paper!

The prompt below is displayed

Ready

(5) The plotter is now in the Debug Mode.

(6) Run the target program at the computer for output to the plotter.

The message DEBUG MODE is displayed for a few seconds.

In this mode, the plotter’s buffer memory is reduced to the following sizes:

• In RS-232C mode : 256 bytes

• In Centronics mode : 10 bytes

(7) To exit the Debug Mode, turn off the plotter and then turn it back on using only the POWER switch.

HINT: When using the RS-232C interface, the timing of data transmission varies with the selected

handshake mode as follows.

• During hardwire handshaking:

The ER (DTR) signal line goes off when the available space in the buffer drops to 64 bytes.

It goes on when the available space in the buffer rises to 128 bytes of data.

• During Xon/Xoff handshaking:

Xoff status is entered when the available space in the buffer drops to 32 bytes.

Xon status is entered when the available space in the buffer rises to 128 bytes of data.

NOTE: After the plotter is turned off, Debug mode is not resumed when only the ENTER key is

pressed.

The Debug mode cannot be used with the USB interface.

MP303-UM-251-9370 6-11


6.7.4 Pen Retrieval Test Mode

Use this mode to perform a pen retrieval test and to adjust the pen positions.

Procedure (Fast Mode)


(2) Hold down the LEFT ARROW POSITION key and DOWN ARROW POSITION key while you turn on the

plotter.

(3) Press the ENTER key to start the pen retrieval test.

Execution of the pen retrieval test can be temporarily suspended by pressing the PAUSE or ENTER key.

To resume test execution, press the PAUSE or ENTER key.

(4) To exit the pen retrieval test mode, turn off the plotter.

Procedure (Slow Mode and Pen Position Adjustment)


(2) Hold down the CANCEL key while you turn on the plotter.


(4) Press the ENTER key to display the prompt shown below.

SelectADJ SLOW

(5) If you want to start the slow pen retrieval test, press the RIGHT ARROW POSITION key. The plotter will

begin plotting the pen numbers on the paper.

Execution of the pen retrieval test can be temporarily suspended by pressing the PAUSE or ENTER key.

To resume test execution, press the PAUSE or ENTER key.

(6) If you want to adjust the pen positions, press the LEFT ARROW POSITION key at the above menu. The

plotter then displays the menu shown below. You can adjust the position of pen number 1 by using the

ARROW POSITION keys.

No.1PressENT

Press the ENTER key after you have adjusted the position of pen number 1. The plotter then displays the

menu shown below.

No.8PressENT

Press the ENTER key after you have adjusted the position of pen number 8.

(7) To exit the pen retrieval test mode, turn off the plotter.

MP303-UM-251-9370 6-12


6.7.5 Running Test Mode

Procedure

(1) Move the pen carriage manually to the upper left position so that it crosses the X home sensor and Y

home sensor.

(2) Hold down the CANCEL key and MODE key while you turn on the plotter.

(3) The plotter starts the running test.

(4) To exit the Running Test Mode, turn off the plotter.

MP303-UM-251-9370 6-13


6.7.6 Sensor Test Mode

Procedure (Using the DIP switch)

(1) Set SW1 to the Sensor Test Mode as shown below and then turn on the plotter.

OFF

ON

1 2 3 4

SW1

(2) The status of each sensor is displayed on the LCD panel.

XH YH

Display Sensor name Operation when the High/Low level changesXH X home sensor When the dog blocks the sensor XLYH Y home sensor Same as the above YL

(3) If a sensor is not operating properly, check its wiring, its connector contact, and the position of the sensor

dog. If everything checks out all right, either the sensor or main board may be defective.

In this case, initialize the NOV-RAM and then run the sensor test again.

(4) To exit the sensor test mode, turn off the plotter and then return the SW1 setting to normal mode as

shown below.

OFF

ON

1 2 3 4

SW1

Procedure (Using control panel keys)

(1) Move the pen carriage manually to the upper left position so that it crosses the X home sensor and the Y

home sensor.

(2) Hold down the UP ARROW POSITION key and DOWN ARROW POSITION key while you turn on the

plotter.

(3) The menu below appears.

KEY&LED TEST

(4) Press the DOWN ARROW POSITION key to display the menu shown below.

SENSOR TEST

(5) Press the ENTER key to put the plotter into the Sensor Test Mode.

MP303-UM-251-9370 6-14


(6) The status of each sensor is displayed on the LCD panel.

XH YH

Display Sensor name Operation when the High/Low level changesXH X home sensor When the dog blocks the sensor XLYH Y home sensor Same as the above YL

(7) If a sensor is not operating properly, check its wiring, its connector contact, and the position of the sensor

dog. If everything checks out all right, either the sensor or main board may be defective.

In this case, initialize the NOV-RAM and then run the sensor test again.

(8) To exit the Sensor Test Mode, turn off the plotter.

MP303-UM-251-9370 6-15


6.7.7 Control Panel Key Test Mode

Procedure (Using the DIP switch)

(1) Set SW1 to the Control Panel Key Test Mode as shown below and then turn on the plotter.

OFF

ON

1 2 3 4

SW1

(2) The menu below appears, so press the control panel key corresponding to each bit and check that its

value properly changes to 1 from 0.

CMERDLU00000000

Press each key on the control panel; the status will change as shown below.

Key Status of LCDC M E R D L U

CANCEL 0 1 0 0 0 0 0 0MODE 0 0 1 0 0 0 0 0

ENTER 0 0 0 1 0 0 0 0RIGHT ARROW 0 0 0 0 1 0 0 0DOWN ARROW 0 0 0 0 0 1 0 0LEFT ARROW 0 0 0 0 0 0 1 0UP ARROW 0 0 0 0 0 0 0 1

Normal status : 0

While the key is pressed : 1

(3) If a key is not operating properly, check its wiring and its connector contact. If everything checks out all

right, either the control panel or main board may be defective.

In this case, initialize the NOV-RAM and then run the control panel key test again.

(4) To exit the Control Panel Key Test Mode, turn off the plotter and then return the SW1 setting to normal

mode as shown below.

OFF

ON

1 2 3 4

SW1

Procedure (Using control panel keys)

(1) Move the pen carriage manually to the upper left position so that it crosses the X home sensor and the Y

home sensor.

(2) Hold down the UP ARROW POSITION key and the DOWN ARROW POSITION key while you turn on

the plotter.

(3) The menu below appears.

KEY&LED TEST

MP303-UM-251-9370 6-16


(4) Press the ENTER key to put the plotter into the Control Panel Key Test Mode.

(5) The menu below appears, so press the control panel key corresponding to each bit and check that its

value properly changes to 1 from 0.

CMERDLU00000000

Press each key on the control panel; the status will change as shown below.

Key Status of LCDC M E R D L U

CANCEL 0 1 0 0 0 0 0 0MODE 0 0 1 0 0 0 0 0

ENTER 0 0 0 1 0 0 0 0RIGHT ARROW 0 0 0 0 1 0 0 0DOWN ARROW 0 0 0 0 0 1 0 0LEFT ARROW 0 0 0 0 0 0 1 0UP ARROW 0 0 0 0 0 0 0 1

Normal status : 0

While the key is pressed : 1

(6) If a key is not operating properly, check its wiring and its connector contact. If everything checks out all

right, either the control panel or main board may be defective.

In this case, initialize the NOV-RAM and then run the control panel key test again.

(7) To exit the Control Panel Key Test Mode, turn off the plotter.

MP303-UM-251-9370 7-1

7. TROUBLESHOOTING

7. TROUBLESHOOTING

7.1 The Plotter is Turned On But Doesn’t OperateSymptom Cause Solution

POSITION XY ALARM error appears.

Right after the plotter is turned on.

The X or Y motor is defective.

Replace the X or Y motor.

The main board is defective. Replace the main board.During pen retrieval. See “The plotter cannot

perform pen retrieval correctly.” shown below.

See “The plotter cannot perform pen retrieval correctly.” shown below.

During a plotting operation. There is something blocking the X slider or Y slider.

Remove the blocking object.

The motor control is abnormal.

Replace the main board.

During initialization. Incorrect X or Y home sensor position.

Adjust the X or Y home sensor position. (See Sections 5.10, 5.11.)

The X or Y home sensor is defective.

Replace the X or Y home sensor.

The plotter is not initialized.

The POWER LED lamp does not light.

The AC adapter is defective. Replace the AC adapter.The main board is defective. Replace the main board.

The POWER LED lamp lights.

The firmware is defective. Download new firmware.The main board is defective. Replace the main board.

7.2 During Plotting OperationsSymptom Cause Solution

The plotted lines are faint or blurred.

Non-specified paper was used.

The paper does not suit the pens being used.

Use the specified paper.

Specified paper was used. The pen speed is too fast or the pen force is too low.

Reduce the pen speed or increase the pen force.

Defective pen(s). Replace the pen(s).The pen solenoid is defective.

Replace the pen solenoid.

The pen doesn’t lower. The pen solenoid is defective.

Replace the pen solenoid.

The Y flexible cable is defective.

Replace the Y flexible cable.

The main board is defective. Replace the main board.The plotted line quality is poor.

Appears in the X-axis.Plotted lines are crooked.

The X belt tension is incorrect.The X roller pressure is incorrect.

Adjust the X belt tension.(See Section 5.1.)Adjust the X roller pressure.(See Section 5.6.)

Appears in the Y-axis.Plotted lines are crooked.

The Y belt tension is incorrect.The Y roller pressure is incorrect.

Adjust the Y belt tension.(See Section 5.2.)Adjust the Y roller pressure.

The plotter cannot perform pen retrieval correctly.

The plotter doesn’t draw lines at right angles.

The perpendicularity is incorrect.

Adjust the perpendicularity precision.

The retrieval position shifts to the X direction.

The X home position has shifted.

Adjust the X home position.(See Section 5.10.)

The retrieval position shifts to the Y direction.

The Y home position has shifted.

Adjust the Y home position.(See Section 5.11.)

The perpendicularity and X/Y home positions are correct.

The pen station position is incorrect.

Adjust the pen station position. (See Section 5.12.)

MP303-UM-251-9370 8-1

8. THE ERROR MESSAGES

8. ERROR MESSAGES

8.1 Hardware ErrorDisplayed message Cause

POSITIONXY ALARM

This message appears when, for some reason, the current pen position

is invalid. In this case, turn the plotter off and then back on again.

8.2 GP-GL Command Errors

In GP-GL command mode, the plotter displays the error messages below if an error occurs for which

masking of the corresponding Error bit in the STATUS byte has been disabled using the ˝ command.

Displayed message Cause

E1.COMM ERR

A command error occurs if a hexadecimal code from 60H to 7EH is

processed as a command character. This message may also appear if

the RS-232C interface conditions are improperly set or if the program

being run at the computer was not written using GP-GL commands.

E4.PARA OV

When a command specifying coordinate values is being processed, a

parameter overflow error occurs if a numeric parameter exceeds the

“Parameter Range”.

E5.I/O ERR

An input/output error occurs during the transfer of data via the interface.

With the RS-232C interface, this message indicates that the parity or

data length may be improperly set. Check your interface conditions once

more.

Cancelling an error status

You can cancel an error status using any of the methods below, thereby setting the status of the

corresponding Error bit to zero.

(1) Execute a READ STATUS WORD 1 or READ STATUS WORD 3 command.

(2) Press the ENTER key. (Effective only in case of a data format error.)

Note: If a data format error has occurred, performing either Method (1) or (2) above while

execution of the next command is temporarily suspended enables that command to be

executed.

(3) Initialize the plotter.

(4) Execute the INTERFACE CLEAR command.

Note: Method (3) or (4) clears all the data in the plotter’s buffer memory.

MP303-UM-251-9370 8-2

8. THE ERROR MESSAGES

8.3 HP-GL Command Errors

The plotter displays the messages below when an error occurs for which masking of the corresponding Error

bit in the STATUS byte has been disabled using the IM command.

Displayed message Cause

E1.COMM ERR

A command that cannot be recognized was executed. Check that your

program contains valid HP-GL commands.

E2. PARANO. ERR

A command containing an incorrect number of parameters was executed.

Check that the commands specified in your program are followed by the

correct number of parameters.

E3. PARAEXCEEDED

A command containing a parameter value that exceeds its permissible

range was executed. Check the permissible parameter range.

E5. PARAUNKNOWN

A character that your plotter cannot plot was specified.

MP303-UM-251-9370 9-1

9. DISASSEMBLY DIAGRAMS AND PARTS LISTS


9.1 Main UnitNo. Part No. Part Name Description Q’ty Remarks1 035130123 Electrostatic Panel 1 Same as MP53002 618260100 Writing Panel Base 13 035130110 Insulating Sheet 1 Same as MP53004 773513500 High Voltage Board 1 Same as MP5300

Main Unit

3

4

1

2

MP303-UM-251-9370 9-2


9.2 External CasingNo. Part No. Part Name Description Q’ty Remarks1 618264150 Cover, Right 12 035135023 Cover, Lower Left 13 618264120 Cover, Front 14 618264140 Cover, Rear 15 618260200 Bottom Plate 303 16 031000070 Rubber Foot 4 Same as MP5300

External Casing

4

2

6

6

3

6

1

6

5

MP303-UM-251-9370 9-3


9.3 Control Panel SectionNo. Part No. Part Name Description Q’ty Remarks1 618264100 Cover, Upper Left 12 618260300 Control Panel PR312003 13 771826570 LCD Assembly DMC50448N-E-AE, CA312001 14 031000160 Caution Label No.2 1 Same as MP5300

Control Panel Section

1

2

3

4

MP303-UM-251-9370 9-4


9.4 Bottom PanelNo. Part No. Part Name Description Q’ty Remarks1 618260200 Bottom Plate 303 12 771826500 Main Board 303 13 618264210 Terminal Label 303 14 618264200 Model Name Label 303 1

Bottom Panel

2

14

5

3

MP303-UM-251-9370 9-5


9.5 X-Axis Slider, X-Axis Drive, Pen StationNo. Part No. Part Name Description Q’ty Remarks1 035132013 X Slider 1 Same as MP53002 035132022 X Roller Bracket 1 Same as MP53003 035132030 X Roller Adjustment Bracket 1 Same as MP53004 303100012 X Roller 5 Same as MP53005 035132040 X Rail 1 Same as MP53006 035132220 Antistatic Brush 1 Same as MP53007 035132230 Retaining Rubber 1 Same as MP53008 035132080 Blank Cover 1 Same as MP53009 302200015 Support BSB320 1 Same as MP530010 035032260 Tension Pulley 4 Same as MP530011 509000014 X Motor TS3747N31E3 1 Same as MP530012 035132200 X Drive Shaft M Shaft 53 1 Same as MP530013 380000057 Coupling 1 Same as MP530014 035032341 Drive Pulley 20P2M4BF 2 Same as MP530015 311605068 Drive Shaft Bearing F625ZZ 1 Same as MP530016 353513001 Bush 5 x 4.5 1 Same as MP530017 353513002 Bush 4 x 5 1 Same as MP530018 359800008 Bush 4 X 5 1 Same as MP530019 035132210 X Belt 1820 2 Same as MP530020 035132160 Tension Bracket, Front 1 Same as MP530021 035132170 Tension Bracket, Rear 1 Same as MP530022 035132190 X Limit Bracket 1 Same as MP530023 035130102 Side Cover 1 Same as MP530024 035135041 Cover, Rear A 1 Same as MP530025 618260100 Writing Panel Base 126 773513080 Relay Board PR05406 1 Same as MP5300

508000015 X Home Sensor GP1A53HR 1 Same as MP5300105401150 Y Home Sensor Assembly CS, 05410 1 Same as MP5300508102285 Y Home Sensor SW, SPPB-TYPE1 1 Same as MP5300

27 691801520 X Flat Cable FPC, 05410 1 Same as MP530028 031000110 Pen Station 1 Same as MP530029 020000232 Magnet 8 Same as MP530030 053200240 Pen Cap Spring 8 Same as MP530031 053200330 Pen Cap Rubber 8 Same as MP530032 053200321 Cap Base 8 Same as MP530033 054026020 Support Plate 1 Same as MP530034 035136020 Pen Station Bracket 2 Same as MP530035 795320706 Pen Station w/Magnet 1 Same as MP530036 795320716 Pen Station Assembly 1 Same as MP530037 518110070 Control Panel Flexible Cable Filter ESD-FPL-34 1 Same as MP5300

MP303-UM-251-9370 9-6


X-Axis Slider, X-Axis Drive, Pen Station

10

20

18

25

34

3231

29

36

35

28

3033

34

24

59

2110

17

43

4

4

1910

6

126

8

7

2

14

2227

11

23

13

37

19

16

14

15

12

MP303-UM-251-9370 9-7


9.6 Y-Axis Slider, Y-Axis DriveNo. Part No. Part Name Description Q’ty Remarks1 035133012 Y Bar 1 Same as MP53002 035133020 Y Pulley Mounting Plate 1 Same as MP53003 035133031 Y Pulley 12 1 Same as MP53004 035133040 Y Pulley Shaft 1 Same as MP53005 035133050 Y Belt 1 Same as MP53006 035133102 Drive Pulley 10 1 Same as MP53007 035132230 Y Motor TS3747N32E3 1 Same as MP53008 773513100 Pen Holder Assembly 1 Same as MP53009 035134072 Pen Holder 1 Same as MP530010 020000232 Magnet 1 Same as MP530011 035034081 Solenoid Support Rubber 1 Same as MP530012 509000035 Solenoid J119-189 1 Same as MP530013 105401090 Pen Flexible Printed Cable FPC, 05401 1 Same as MP530014 035134013 Y Slider 1 Same as MP530015 035134081 Y Roller 10B 3 Same as MP530016 031004330 Y Roller Spindle 1 Same as MP530017 035134020 Pen Force Adjustment Screw 1 Same as MP530018 035134090 Pen Holder Spacer 1 Same as MP530019 035134041 Pen Up Spring 1 Same as MP530020 035134100 Plunger Spring 1 Same as MP530021 052113610 Y Flexible Printed Cable Holder 1 Same as MP530022 353513005 Bush 3 x 9.5 1 Same as MP530023 303100003 Pivot Bearing 2 Same as MP530024 031004540 Pivot Bearing Screw 2 Same as MP530025 618264150 Solenoid Cover 303 126 035132061 Y Motor Cover 1 Same as MP530027 035132050 Y Bar Cover 1 Same as MP530028 035132070 Y Slider End 1 Same as MP530029 035132120 Y Roller Spindle 1 Same as MP530030 035032260 Tension Pulley 1 Same as MP5300

MP303-UM-251-9370 9-8


Y-Axis Slider, Y-Axis Drive

26

6

7

15

21

13

24

14

1217

16 15

2415

2322

1810

9

2311

20

8

25

5

1

432

3028

29

27

19

MP303-UM-251-9370 9-9


9.7 Standard AccessoriesNo. Part No. Part Name Description Q’ty Remarks1 500051951 AC Adapter SA45-3129 1 For all countries2 500052004 AC Power Cable 100V JAPAN 361-70100020-01 1 Depends on the country

500052350 AC Power Cable UL UC-671-N03 1 Depends on the country500052402 AC Power Cable CEE EN-514-N04 1 Depends on the country500052397 AC Power Cable BS BS89/3-C7-1.8m 1 Depends on the country

3 053139013 Tilt Stand 24 035139020 Plastic Cover 15 031009020 Paper Alignment Labels 16 031000070 Rubber Foot for Tilt Stand 47 500052043 USB Cable CBL0106-1.5M 18 618269350 CD, User’s Manual MP303-CUG01 19 618269380 Quick Manual MP303-UM-851 110 982000070 Ceramic Pen HC503P-BK 1

9.8 OthersNo. Part No. Part Name Description Q’ty Remarks1 618269100 Packing Box for MP303 1

MP303-UM-251-9370 10-1

10. CIRCUIT DIAGRAMS


10.1 Main Board

Main board (Top)

CONNECT

CONNECT

LOCALZ

YENA

YENB

D[0..15]

LOCALLED

IOCS1Z

SFREE

LCDB[0..6]

FR_BUSYZ

PENH

PENL

CHARTLED

CHARTHOLDZ

XHOMEZ

YHOMEZ

YMP

YMM

PENUP

PENCONT1

PENCONT2

PB[0..7]

DCDRIVER

DCDRIVER

XCOMA

SFRZ

YCOMA

XCOMB

YCOMB

PENH

PENL

YMP

YMM

PENUP

PENCONT1

PENCONT2

GRC1507

GRC1507

XCOMB

D[0..15]

CENCSZ

SRVINTZ

CINTINZ

CS2Z

YCOMA

SFREE

RESET

RDZ

CINTOUTZ

XCOMA

LOCALZ

LOCALLED

WRLZ

YCOMB

CS1Z

LOCALINTZ

SFRZ

YENA

YENB

USBCSZ

A[0..21]

AP[18..21]

AB-ENZ

NVRAMCSZ

IOCS1Z

CHARTHOLDZ

CHARTLED

CHARTINTZ

KROMCSZ

IF IF

RXD0

CTS0Z

DSR0Z

TXD0

RTS-DZ

DTR-DZ

D[0..15]

A[0..21]

CENINT

RDZ

WRLZ

CENCSZ

RESET

YHOMEZ

XHOMEZ

PB[0..7]

MEMORY

MEMORY

D[0..15]

A[0..21]

FR_BUSYZ

RASZ

CASLZ

CASHZ

RDZ

RDWR

EPROMOUT

RESETZ

NVRAMCSZ

CS0Z

WRLZ

KROMCSZ

USB

USB

USBINTZ

RDZ

RESETZ

WRLZ

USBCSZ

D[0..15]

A[0..21]

CPU

CPU

RDZ

WRLZ

CS1Z

RDWR

CS0Z

RESET

CASHZ

RASZ

CASLZ

A[0..21]

RXD0

TXD0

CTS0Z

DSR0

LCDB[0..6]

LOCALINTZ

USBINTZ

SRVOINTZ

D[0..15]

CINTOUTZ

CS2Z

DTR-DZ

RTS-DZ

EPROMDOUT

AB-ENZ

AP[18..21]

RESETZ

CHARTINTZ

A[0..21]

AP[18..21]

NVRAMCSZ

CENCSZ

RESETZ

RESET

LCDB[0..6]

RESET

RESETZ

CENCSZ

USBCSZ

NVRAMCSZ

IOCS1Z

SRVINTZ

CINTZ

LOCALINTZ

USBINTZ

RESETZ

IOCS1Z

USBCSZ

D[0..15]

RESET

LOCALINTZ

SRVINTZ

USBINTZ

CINTZ

CHARTINTZ

PENH

PENL

PENH

PENL

CHARTINTZ

YMP

YMM

YMP

YMM

PB[0..7]

KROMCSZ

KROMCSZ

MP303-UM-251-9370 10-2


Main board (Connections)

1

11

1

2

22

2

33 3

3

4

44

4

YM

PY

MP

YM

MY

MM

GN

DYA

0Y

B0

VC

CP

EN

HP

EN

LG

ND

XH

OM

EZ

YH

OM

EZ

2/1

2/2

1/2

1/1

LCD

_CO

NT

VC

CG

ND

RS

R/W

E D4

D5

D6

D7GN

D

KE

Y2

PAU

SE

ZC

HA

RT

HO

LDZ

PO

WE

RLE

D

GN

D

VC

C

KE

Y1

KC

ON

T1Z

PAU

SE

LED

KE

Y0

KC

ON

T0Z

KE

Y3

CH

AR

TLE

D

D3

D0

D5

D6

D7

D4

D2

D1

LC

DB

4

LC

DB

6

LC

DB

3

LC

DB

5

LC

DB

2L

CD

B1

LC

DB

0

PR

OM

PT

LE

D

PB

0

PB

4

PB

2P

B3

PB

7

PB

1

PB

6P

B5

PR

OM

PT

LED

KC

ON

T0

KC

ON

T1

KC

ON

T0

KC

ON

T1

VC

C

VC

C

VC

C

+2

4V

VC

C

VC

C

+1 2

V

+2

4V

+24

V

VC

C

VC

C

VC

C

FL

6E

XC

CE

T1

02 U

J4

B2

B-X

H-A

2 1+

24

VC

HG

ND

C5

10

2

FL

29

N2

01

2Z

12

1T

03

TP

1+

24

V

FL

26

N2

01

2Z

12

1T

03

FL

24

EX

CC

ET

10

2U

RA

71

0K

*4

R5

0

FL

2E

XC

CE

T1

02 U

FL

16

EX

CC

ET

10

2U

FL

20

SN

T-S

10

R4

48.2

K

C2

10

4

J2 SL

D1

3S

-1

1 2 3 4 5 6 7 8 9 10

11 12

13

Q1

2S

C4

112

D1

91

SS

35

2-T

PH

3

D3

D4

1S

S3

52

-TP

H3

U2 7

4H

C2

45

/SO

2 3 4 5 6 7 8 9 191

18

17

16

15

14

13

12

11

A0

A1

A2

A3

A4

A5

A6

A7

OE

DIR

B0

B1

B2

B3

B4

B5

B6

B7

U1

B7

4L

S0

63

4

C1

0

10

00

uF

/10

V

U4

SI-

80

50

1

3

5

24

Vin GND

ON

Vo

ut

FB

FL

15

EX

CC

ET

10

2 U

FL

7N

20

12

Z1

21

T0

3

FL

3E

XC

CE

T1

02 U

R6

0

U1

D

74

LS

06

98

FL

12

EX

CC

ET

10

2 U

FL

28

EX

CC

ET

10

2U

FL

5E

XC

CE

T1

02 U

FL

13

EX

CC

ET

10

2U

FL

21

SN

T-S

10

J3H

EC

04

70

-01

-64

01

2

C8

10

4

R3

47

0 2

01

2

D1

81

SS

35

2-T

PH

3

FL

19

SN

T-S

10

R2

47

0 2

01

2

FL

18

EX

CC

ET

10

2 U

SW

2

SJ-

W2

P4

A-3

0B

B

TP

2+

12V

U5

A 74

HC

08

1 23

R7

0

J11

B1

0B

-PH

-K

1 2 3 4 5 6 7 8 9 10

RA

31

0K

*4R

A4

10

K*4

FL

22

SN

T-S

10

U1

A7

4L

S0

61

2

C7

22

0u

F/5

0V

D7 SF

PW

-56

U3

NJM

78

M1

2D

L1

A

13

2

IO

G

U1

C7

4L

S0

65

6

RA

21

0K

*4

FL

27

EX

CC

ET

10

2U

RA

51

0K

*4

FL

17

EX

CC

ET

10

2U

FL

4E

XC

CE

T1

02 U

FL

14

EX

CC

ET

10

2U

D2

D5

SF

PW

-56

FL

25

N2

01

2Z

12

1T

03

R9

0

TP

3G

ND

TP

4V

CC

D6

SF

PW

-56

C1

47

uF

/16

V

C6

10

4D1

FL

9N

20

12

Z1

21

T0

3

L1

SL

F1

25

75

-15

1M

1R

5

FL

23

EX

CC

ET

10

2U

R1

47

0 2

01

2

C4

10

2

R4

470

20

12

C3

10

uF

/16

V

C9

22

0u

F/5

0V

SW

1

A6S

-410

1(O

MR

ON

)

FL

1E

XC

CE

T1

02U

RA

11

0K

*4

J1

55

97

-14

CP

B

1 2 3 4 5 6 7 8 9 10

11 12

13

14

RA

61

0K

*4

F1

ET

2A

(fu

se)

YE

NA

YE

NB

D[0

..1

5]

FR

_B

US

YZ

IOC

S1

Z

PB

[0..

7]

LC

DB

[0..

6]

LO

CA

LL

ED

CH

AR

TL

ED

YM

P

YM

M

PE

NH

PE

NL

XH

OM

EZ

YH

OM

EZ

CH

AR

TL

ED

SF

RE

EP

EN

UP

PE

NC

ON

T1

PE

NC

ON

T2

LO

CA

LZ

CH

AR

TH

OL

DZ

MP303-UM-251-9370 10-3


Main board (CPU)

11

11

12

22

22

33

33

34

44

44

A4

A15

A10

A11

A17

A9

A6

A8

LCDB2

LCDB1

LCDB5

LCDB0

LCDB4

LCDB3

LCDB6

A3

A0

A16

A7

A12

A2

A1

A5

A14 A13

D5

D7

D3

D2

D11

D15

D6

D4

D11

D6

D3

D13

D12

D1

D12

D15

D5

D8

D9

D0

D4

D10

D13

D8

D1

D14

D2

D10

D14

D7

D0

D9

A1A0

A5A4A3A2

A9A8A7A6

A13A12A11A10

A17A16A15A14

AP21

AP20

AP19

AP18

VCC

VCC

VCC

VCC

VCC

VCC

VCC

VCC

VCC

U1F

74LS06

13

12

C19

104

RA11

22K*4

C11

18

RA18

10K*4

C14

104

RA8

22K*4

R11

0

R13

10K

U7

PST592D

MT

1 2

3 4

VOUT

M.R

Vcc

GND

R12

C23

104

C15471

FL41

N2012Z121T03

R14200

RA12

22K*4

C20

104

R153K

C17

104

RA15

10K*4

RA19

10K*4

U5B

74HC08

4 56

U1E

74LS06

1110

RA16

10K*4

U5C 74HC08

9 10

8

RA13

10K*4

RA9

22K*4

RA17

10K*4

C21

104

C13

104

C18

104

Y1

XPEEEC6.00M

Hz

C12 18

U6 SH7014

45678910111213141516171819202229303132

70696867666463626059585756545352

72

74

73757879

84

76

919293949596

9899

97

100

45

24252628

5150

4847

383634

4140

44

49464342

85868788

89102

104

105

106

107

108

110

111

112

1 283

808182

21376577103

32327333955617190101109A

0A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

A14

A15

A16

A17

PB6/A18

PB7/A19

PB8/IRQ6/A20/W

AIT

PB9/IRQ7/A21

D0

D1

D2

D3

D4

pen plotter · 2020. 6. 18. · contains the keys used for controlling the plotter’s operations...

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