Panasonic PT-51HX42CF, Service Manual

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Service Manual
NTSC Sub-Bright adjustment (BRIGHT)
Procedure:
1.
Set PIC MODE TO VIVID, PICTURE settings to
normal, NATURAL COLOR to OFF and COLOR
TEMPERATURE to NORMAL.
2. Connect meter (+) to TPD50 and (-) to TPD51.
3. Apply a NTSC color bar with no color or if available
a grey levels pattern.
4. Adjust DAC BRIGHT data so that bar near to black
bar becomes near black .
5. Apply a white pattern and put user bright control to
max. and confirm reading on meter is 12.4±1_V.
1080i Sub-Bright adjustment (BRIGHT)
Procedure:
1.
Set same settings as NTSC adjustment
2. Apply a 1080i signal, and repeat adjustments as
from step 2 in NTSC adjustment.
3. If pattern is not available, use a color signal in
1080i and adapt the adjustment to that available
signal
4. Adjust DAC CONT so that black and white level
are in good balance (white is white and black is
black)
NTSC Color adjustment
(TINT, B-Y_G, R-Y_A)
Note: 1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51 set-top box DTV
decoder.
This adjustment requires that the servicer use its skills
in observing what a colorbar pattern should looks like.
Preparation:
1.
Set the following in the user picture menu as
follows:
PIC MODE:VIVID
COLOR: center (31)
PICTURE: max (63)
BRIGHT: center (31)
SHARPNESS: min. (0)
TINT:(31)
NATURAL COLOR:OFF
COLOR TEMPERATURE:NORMAL
Procedure:
1.
Apply a NTSC color bar pattern
2. Adjust DAC TINT so that the fourth bar from right to
left becomes purple and good color balance.
3. If the adjustment is high, the bar will look pinkish, if
it is low will look bluish.
4. Adjust B-Y_G so blue look natural, and the rest of
the colors become in balance.
5. Adjust R-Y_A so red look natural, and rest of the
colors become in balance.
6. Check that white bar is real white, no bluish or
redish or tending to become grey.
1080i Color adjustment
(TINT, B-Y_G, R-Y_A)
Note: 1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51 set-top box DTV
decoder.
1. Set same settings as NTSC adjustment
2. Apply a 1080i signal, and repeat adjustments as
from step 2 in NTSC adjustment.
3. If pattern is not available, use a color signal in
1080i and adapt the adjustment to that available
signal.