Panasonic TC-29G12P, Service Manual

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TC-20G12P / TC-29G12P / TC-29G12PU

Service Adjustments and Calibrations

3. Set the White Balance pattern to over side the White Ba-

lance Meter. Adjust the “G” high light to 80µA by changing

SUB-BRIGHT (DAC: B2). If  can not get 80µA, connect a

jumper through the cable between TP38 and  TP41.

4. Then, adjust the “R” high light  (DAC: C3) and the “B”

(DAC: C4) to zero on the White Balance Meter.

5. If the indication of the high light adjust on White Balance

Meter still doesn’t get   80µ A, adjust the bright control to

the maximum.

6. Check the White Balance Meter  under side , if it isn’t

property , readjust the low light on standard window.

      If the error of  “R” is  ± 5µ A  and “B” is 10µ A repeat the

procedure 1 and 2.

7. Exit to the normal mode.

Note

: Adjust the White Balance using equipment  adjusted

to colour temperature 10.800K

°

 + 19MPCD.

COLOR KILLER VERIFICATION

PREPARATION:

1. Adjust  the color control  to level “50”.

PROCEDURE:

1. Apply a pattern signal with 40dB.

2. Verify to not appear color noises on any B/W channel.

3. Verify that the color doesn’t disappear on any color

channel.

FILAMENT VOLTAGE CHECK UP

REQUIRED EQUIPMENTS / CONNECTIONS:

RMS Voltmeter: CRT filament terminal.

PROCEDURE:

1. Apply crosshatch pattern.

2. The filament voltage must be:

TC-20G12P

→

6,15V+0.40Vrms _0.24Vrms

TC-29G12P/TC-29G12PU

→

6,3V+0.40Vrms _0.24Vrms

SUB BRIGHT ADJUSTMENT

PREPARATION:

Adjust CONTRAST to maximum and BRIGHT to center.

PROCEDURE:

1. Apply standard  SUB BRIGHT.

2. Adjust SUB BRIGHT (DAC: B2) to the central part of

PART 6 and PART 7 become black.

(PART 7=Black and PART 6=lightly  illuminated).

4

FOCUS ADJUSTMENT

PREPARATION:

1. Adjust CONTRAST to maximum and BRIGHT to center.

PROCEDURE:

1. Apply a MONOSCOPE or PHILIPS pattern.

2. Adjust the focus to the right side of draw below be best.

3. Adjust the focus, first on the center, and after on the “4“ region.

AUDIO VERIFICATION

PREPARATION :

1. VOLUME

1/3  of  maximum

2. TV SPEAKER SW

ON

PROCEDURE:

1. Set a music or a external signal.

2. Move the volume control since minimum to maximum

and verify if the change is soft.

3. Disconnect the speakers  switch  and verify if exist still

sound on speakers.

AI  SOUND VERIFICATION

REQUIRED EQUIPMENTS / CONNECTIONS:

RF Generator: Input antenna terminal

RMS Voltmeter: TP83

PREPARATION:

1. AI SOUND               ON

2. VOLUME                 MAXIMUN

PROCEDURE:

1. Apply standard pattern with 1KHz audio modulated and

25KHz with 100% deviation.

2. Check if the output is : 240 ± 100mVrms.