Panasonic PT- 56WX51CE, Руководство по обслуживанию

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Service Manual
HV_Feedback Voltage
Procedure:
1.
Apply a NTSC all black pattern.
2. Connect meter (+) to TPD33 and (-) to TPGND1
3. Adjust R524 (D-Board) so that reading on meter is
5.0±0.2_V.
Bright Adjustment (BRIGHT)
Procedure:
1.
Set to normal PICTURE settings, NATURAL
COLOR to OFF and COLOR TEMPERATURE to
NORMAL.
2. Connect meter (+) to TPD50 and (-) to TPD51.
3. Apply a Black/White pattern.
4. Adjust DAC BRIGHT data so that 7.5 IRE part is
same light output as 3 IRE part (See Figure 57).
5. Apply a monoscope pattern and put user bright
control to max. and confirm reading on meter is
16.5±1_V.
Sub-Contrast (CONT), Sub-Bright
(BRIGHT) Adjustment
Preparation:
1.
Set Auto Color and AI Picture to OFF
2. Set the following in the user picture menu as
follows:
COLOR: min. (0)
PICTURE: max (63)
BRIGHT: center (31)
SHARPNESS: min. (0)
Procedure:
1. Apply a Black levels Pattern (See Figure 57)
2. Adjust DAC BRIGHT (final adjustment) so that 7.5
IRE part just look like 3 IRE part.
3. Apply a Black/White pattern (See Figure 58)
4. Adjust DAC CONT so that black and white level
are in good balance (white is white and black is
black)
Tint Adjustment (TINT)
This adjustment should be performed
Preparation:
5.
Set the following in the user picture menu as
follows:
COLOR: center (31)
PICTURE: max (63)
BRIGHT: center (31)
SHARPNESS: min. (0)
Procedure:
1.
Apply a Black levels Pattern (See Figure 59)
2. Adjust DAC TINT so that the fourth bar from left
becomes purple and good color balance.
Figure 57. Black Levels Pattern
WHITE
BLACK
Figure 58. Black/White Pattern
PURPLE
Figure 59. Rainbow Pattern