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FILE NO. 030-200115

SERVICE MANUAL

COLOUR TELEVISION
C01P Chassis

42WH18P 50WH18P

PUBLISHED IN JAPAN

Sep., 2001 So

SERVICE MODE
GENERAL ADJUSTMENTS
1. ENTERING TO SERVICE MODE 1) Press o button once on Remote Control. 2) Press o button again to keep pressing. 3) While pressing the o button, press MENU button on TV set.
Item Data or Sound Mute (Service mode display) S

2. DISPLAYING THE ADJUSTMENT MENU 1) Press MENU button on TV.
Service mode Adjustment mode Item S Press Press Data

SPECIFIC INFORMATIONS

3. KEY FUNCTION IN THE SERVICE MODE The following key entry during display of adjustment menu provides special functions. Screen adjustment mode ON/OFF: Test signal selection : Selection of the adjustment items : Change of the data value : Adjustment menu mode ON/OFF : Initialization of the memory (QA02) : Reset the count of operating protect circuit to "00": "RCUT" selection : "GCUT" selection : "BCUT" selection : "SCNT" selection : "COLP" selection : "TNTC" selection : Convergence adj : Self diagnostic display ON/OFF : -/-- ( ) button (on Remote) a button (on Remote) Channel s/t (on TV or Remote) Volume ; +/ (on TV or Remote) MENU button (on TV) CALL + Channel button on TV (s) CALL + Channel button on TV (t) 1 button 2 button 3 button 4 button Color thickness correction 5 button note: Displayed differently as shown below, de6 button pending on the setting of the receiving color YELLOW button system. 9 button COLP (PAL) COLC (NTSC) COLS (SECAM)

CAUTION : Never try to perform initialization unless you have changed the memory IC.

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4. SELECTING THE ADJUSTING ITEMS 1) Every pressing of CHANNEL s button in the service mode changes the adjustment items in the order of table-2. (t button for reverse order) Refer to table-2 for preset data of adjustment mode. (See SETTING & ADJUSTING DATA on page 32) 5. ADJUSTING THE DATA 1) Pressing of VOLUME ; +/ button will change the value of data in the range from 00H to FFH. The variable range depends on the adjusting item. 6. EXIT FROM SERVICE MODE 1) Pressing POWER button to turn off the TV once. s INITIALIZATION OF MEMORY DATA OF QA02 After replacing QA02, the following initialization is required. 1. Enter the service mode, then select any register item. 2. Press and hold the CALL button on the Remote, then press the CHANNEL s button on the TV. The initialization of QA02 has been complated. 3. Check the picture carefully. If necessary, adjust any adjustment item above. Perform "Auto search Memory" on the owner's manual. CAUTION: Never attempt to initialize the data unless QA02 has been replaced. 7. TEST SIGNAL SELECTION 1) Every pressing of a button on the Remote Control changes the built-in test patterns on screen as described below in SERVICE MODE.

Signal off

PAL signals (5 patterns) NTSC signals (5 patterns)

Signals · Red raster · Green raster · Blue raster · All White · Black cross-hatch

Picture

*

The signals marked with

are not usable to display in the Test signal for some model.

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SPECIFIC INFORMATIONS

GENERAL ADJUSTMENTS

GENERAL ADJUSTMENTS

8. SELF DIAGNOSTIC FUNCTION 1) Press "9" button on Remote Control during display of adjustment menu in the service mode. The diagnosis will begin to check if interface among IC's are executed properly. 2) During diagnosis, the following displays are shown. Indicated color of mode now selected : Green and Red Indicated color of other modes : Black
2300**** TIME POWER BUS CONT BLOCK

: : : :

000000 00 OK UV V1 V2 V3 V4

Green : Normal Red : The microcomputer operates to provide judgement of no video signal. The red color is still indicated though the signal is input, failure may exist in input signal line including QV01. NOTE: (1) In case that "on timer" indicator is blinking with interval of 0.5 seconds; it means protecting circuit (Current limiter) is operating, and circuit components may possibly be damaged. Check related components. (2) In case that "on timer" indicator is blinking with interval of 1 second; Protecting circuit does not operate, but a part of Bus line does not operate normally. Check Bus line.

SPECIFIC INFORMATIONS

Part number of microcomputer (QA01) Total hour of turn the TV on. (Unit: H) Operation number of protecting circuit ----"00" is normal. When indication is other than "00", overcurrent apts to flow, and circuit parts may possibly be damaged. BUS CONT ----"OK" is normal. When indication shows "Q uuu NG", the device with the number may possibly be damaged. BLOCK UV : TV reception mode V1 : VIDEO 1 input mode (a1) V2 : VIDEO 2 input mode (a2) V3 : VIDEO 3 input mode V4 : VIDEO 4 input mode

*

The items marked with

are not usable to display in the SELF DIAGNOSTIC FUCTION for some model.

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DESIGN MODE
3) Press MENU button on TV.

S

D

Press Press

ITEM DATA

(Design mode)

(Adjustment mode)

When QA02 is initialized, items "OPT0", "OPT1" and "OPT2" of DESIGN MODE are set to the data of the representative model of this chassis family. Therefore, because ON-SCREEN specification remains in the state of the representative of model. This model is required to reset the data of items "OPT0", "OPT1" and "OPT2". 2. SELECTING THE ADJUSTING ITEMS Every pressing of CHANNEL t button in the design mode changes the adjustment items in the order of table-3. (s button for reverse order) Refer to table-3 for data of design mode. (See SETTING & ADJUSTING DATA on page 32) 3. ADJUSTING THE DATA Pressing of VOLUME s or t button will change the value of data.

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SPECIFIC INFORMATIONS

GENERAL ADJUSTMENTS

1. ENTERING TO DESIGN MODE 1) Select the Service mode. 2) While pressing CALL button on Remote and press MENU button on TV.