CL2999C

.

UOC TOP 64PIN SERIES

CONTENTS1. safety precautions3

2. TV signal block diagramand UOC TOP 64PIN signal processor block diagram..53 Replacement of memory IC94 Service adjustment...95 ICs functional description166 Test point waveform.217 Purity / convergence adjustment..231. SAFETY PRECAUTIONS1. The design of this product contains special hardware, many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the products should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards

4. Dont short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing. Some models power circuit is partly different in the GND. The difference of the GND is shown by the LIVE: ( ) side GND, ISOLATED (NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Dont short between the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time. If above note will not be kept, a fuse or any parts will be broken.

5. If any repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).

6. The high voltage applied to the picture tube must conform with that specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product.

7. Do not check high voltage by drawing an arc. Use a high voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k 2W resitor to the anode button.

8. When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the 9. manufacturers replacement components.

10. Isolation Check

(Safety for Electrical Shock Hazard)After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screwheads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.11. The surface of the TV screen is coated with a thin film which can easily be damaged. Be very careful with it when handle the TV.Should the TV screen become soiled, wipe it with a soft dry cloth. Never rub it forcefully. Never use any cleaner or detergent on it.(1) Dielectric Strength Test

The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second.

(Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a periode of one second.)

This method of test requires a test equipment not generally found in the service trade.(2) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a Leakage Current Tester, measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.).

However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).Alternate Check Method

Plug the AC line cord directly into the AC outlet ( do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500 10W resistor paralleled by a 0.15F AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.).

However, in tropical area, this must not exceed 0.3V AC (r.m.s.).

This corresponds to 0.2mA AC (r.m.s.)

2 TV Block diagram(14~34)

3.REPLACEMENT OF MEMORY IC

1. MEMORY IC.

This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits.

When replacing memory IC, be sure to use IC written with the initial value of data.

2. PROCEDURE FOR REPLACING MEMORY IC

(1) Power off

Switch the power off and unplug the power cord from AC outlet.

(2) Replace IC

Be sure to use memory IC written with the initial data values.

(3) Power On

Plug the power cord into the AC outlet and switch the power On.

(4) Check and set SYSTEM default value:

1) Press MENU key and then press number 6 4 8 3 key on the Remote control unit. Or Press Factory key on the Remote control unit for factory used.

2) The Factory / M will be displayed on the screen.

3) IN M MODE,PRESSMUTEKEY WILL BE ENTER M0.THEN PRESSMUTEKEY WILL ENTER M1 AND M2.4) IN M2 SELECT SETUP SELECT TO 1,THEN PRESSMUTEKEY WILL BE ENTERM3 TO M9.5) Check the setting value of the SYSTEM default value of Table below. If the value is different, select items by [CH+]/[CH-] keys and set value by [VOL+]/[VOL-] keys.

6) Press STANDBY key again and return to the normal screen.

4.SERVICE ADJUSTMENT

B+ POWER SUPPLY

1. Receive normal colour bar signal.

2. Connect DC voltmeter to VD559- and isolated ground.

3. Adjust potentiometer in power unit to get the voltage +B= 110V 1.0V 14 inch =110 V 1.0V 21 inch =130~1351.0V 29~34 inchNotice:Upwards +B setup,by way of consult only,concrete adjustment, must basis the CRT type to certain.

FOCUS ADJUSTMENT

1. Receive a crosshatch signal.

2. While watching the screen, adjust the FOCUS VR to make the vertical and horizontal lines as fine and sharp as possible. Factory menu adjustment1Enter the factory menu PUSH MENUKEY DISPLAY PICTURE MANUAL PUSH DIGITAL KEY 6483 enter the factory mode,DISPLAY M. PRESSPOWERKEY WILL EXIT THE FACTORY MODE

INTESTMODE .PRESS-/--KEY WILL BE ENTERBUS OPEN.

2Enter the adjustment menu IN M MODE,PRESSMUTEKEY WILL BE ENTER M0.THEN PRESSMUTEKEY WILL ENTER M1 AND M2. IN M2 SELECT SETUP SELECT TO 1,THEN PRESSMUTEKEY WILL BE ENTERM3 TO M9.3Factory MENU Please see the factory menu file to get detail description.

NOTE:

(1) Geometry adjust:Receive standard Crosshatch pattern signal for PAL system . Adjust v.slope value to the horizontal line just appear from half bottom shadow. Adjust V.posi value to the center horizontal line correspond to CRT vertical center Adjust V.size value to get 90% of vertical picture contents would be displayed on CRT Adjust VSC value to vertical S-correction is ok Adjust H.PHASE value to get the picture horizontal center correspond to CRT horizontal center(2) White balance adjust: SELECTVSD AND PRESSV+ KEY .WILL BE ENTER SC LINE MODE AJUST G2 VOLTAGE TO THE SCREEN JUST DISPLAY THE LINE PRESS NO.2IS REDUCERBIAAND NO.3IS INCREASERBIA PRESS NO.4 IS REDUCE GBIAAND NO.5 IS INCREASE GBIA PRESS NO.6 IS REDUCE BBIA AND NO.7 IS INCREASE BBIA PRESS V+ KEY WILL BE EXIT THE SC LINE MODE

(3) RF-AGC adjust: Receive 60dBu (1mv)VH color bar signaladjust AGC valuevoltage from high to lowto picture noise reduce gradually to be just disappeared.

4LOGO EDIT IN FACTORY MODE AND PRESS [CALL] KEY WILL BE ENTER LOGO EDIT

PRESS[1]/[2]KEY: ADJUST THE VERTICAL POSITION OF LOGO

PRESS[3]/[4]KEY: ADJUST THE HORIZONTAL POSITION OF LOGO

PRESS[5]/[6]KEY: ADJUST THE COLOR OF LOGO

PRESS[7]/[8]KEY: ADJUST THE SIZE OF LOGO

PRESS[MENU]KEY: ADJUST THE LIN1 1 VERTICAL POSITION

PRESS[MUTE]KEY: ADJUST THE LINE 2 VERTICAL POSITION

PRESS[(]/[(]KEY: ADJUST THE VALUE OF LOGO0~9A~Za~z; :.+-*/@,SPACE

PRESS[(]/[(]KEY: ADJUST CURSOR

PRESS[CALL] KEY: EXIT LOGO EDIT MODE;ICs Default Settings1. UOC TOP TDA1XXXXPSMIItemsVariablePresetDescription

M0PALNTSC

V. SLOPE0~6325-09Vertical slope

V. POSI0~63340Vertical shift

V. SIZE0~6332+09Vertical amplitude

V. SC0~63290S-correction

V. LINE0~6334+2Vertical linearity correction.

V.SCR0~6326-06Vertical scroll

H. PHASE0~6335+10horizontal shift.

EW. W0~6353+01EW width

EW.PW0~6327+04EW parabola width

EW. TC0~6336-01EW trapezium correction.

EW. UCP0~63350EW upper corner parabola

EW. LCP0~63340EW lower corner parabola

H. BOW0~63300Horizontal bow correction

H. PAR0~63330Horizontal parallelogram correction

H.BL.SWOFF/ONONHorizontal blanking switch

H.BLK.L0~154Horizontal left Blanking adjust

H.BLK.R0~157Horizontal right Blanking adjust

VX0~6325Vertical zoom

RGB HSH0~632Horizontal shift of RGB mode.

M1CL0~158Video Amplitude

BLOC0~158Black level offset Course

R. BIA0~6332Black level offset R for Cold

G. BIA0~6332Black level offset Green for Cold

B. BIA0~6332Black level offset Blue for Cold

R. DRV0~6332White point R for Cold

G. DRV0~6332White point G for Cold

B. DRV0~6332White point B for Cold

SUB BRT0~6332SUB brightness

VSDShade Bar Adjust

M2RF. AGC0~6328AGC Adjust

OSD. V. POS0~635137OSD Vertical shift

OSD. H. POS0~636OSD Horizontal shift

OSDBRT0~1513OSD brightness adjust

CURT. POS0~21

SHIPPINGLeave the factory state setting

SETUPSELECT0~10Enter an engineer the menu choice

M3SUB CONT0~6363Sub contrast

SUB COLOR0~6351Sub color

SUB SHARP0~6351Sub sharpness

SUB TINT0~6331Sub tint

BTC0~6332Base-band tint control

COF0~10Cut-off control range

TDA11115/TDA11145BTSC MODEMONO/STEREO/SAPSTEREO

ST01513

SP01512

L0154

A10310

A203131

TC073

STS0/11

V CHIPON/OFFON

FRENCHON/OFFON

PORTUGUESEON/OFFON

ENGLISHOFF/ONON

FRENCHOFF/ONON

TURKISHOFF/ONON

PORTUGUESEOFF/ONON

BULGARIANOFF/ONON

RUSSIANOFF/ONON

FARSIOFF/ONON

ARABICOFF/ONON

RUMANIANOFF/ONON

SPANISHOFF/ONON

ITALIANOFF/ONON

GERMANOFF/ONON

DUTCHOFF/ONON

SWEDISHOFF/ONON

NORWEGIANOFF/ONON

HUNGARIANOFF/ONON

POLISHOFF/ONON

CZECHOFF/ONON

SLOVENEOFF/ONON

CROATIANOFF/ONON

MACEDONIANOFF/ONON

SERBIANOFF/ONON

GREEKOFF/ONON

M4VA0~30Video output signal amplitude

CBS0~10Control sequence of beam current limiting

COR0~31Video dependent coring (peaking)

RPA0~32Ratio pre- and aftershoot

RPO0~32Ratio of positive and negative peaks

DISG0~10

DDLE0~10

TCI2X0~10Top sync clamp current of the CVBS/Y input clamp

BKSOFF/ONONBlack stretch

BSD0~11Black Stretch Depth

AAS0~31Black area to switch off the black stretch

PWLOFF/ONONPeak White Limiting

SOC0~32Soft clipping level

PWLDAC0~152Peak White Limiting. 0=0.4 VBL-WH

15=0.6 VBL-WH

CHSE0~32PAL/NTSC ident sensitivity (burst amplitude at strong signal)

OUV0~10

TFR0~10DC transfer ratio of luminance signal

DSK0~10Dynamic skin control on/off

DSA0~10Dynamic skin tone angle

WS0~30Gamma control and white stretch settings

BLS0~10Blue stretch

S. IDENTOFF/ONONs-video signal input priority switch

M5OIF0~6332PLL demodulator frequency setting

FFI0~11Fast filter IF-PLL

AGCS0~32IF AGC speed

DCXO0~32?

FSL0~11Forced slicing level for vertical sync

SSL0~11Slicing level for horizontal sync separator

GD0~10Group delay on CVBS1 signal

HP20~10Synchronization of OSD/TEXT display

AKBOFF/ONONBlack current stabilization

ON V.A0~1513?

DFL0~10Disable flash protection from deflection timer

XDT0~10X-ray detection

FBC0~10Fixed beam current switch-off

QDT0~10Second chroma trap

FBC10~10Fixed beam current during switch off

FSPS0~10Selection of left or right hand side in Split-Screen mode

FSPB0~10Blanking in Split-Screen mode

FSPE0~10Enable Split-Screen mode for demonstration of features

HCO0~10EHT tracking mode

OSVE0~10Black current measuring lines in overscan (for vertical zoom setting