Hitachi 28LD5200E Service Manual page 16

Item AUTOMATIC SIGNAL LEVEL ADJ USTMENT –RGB (1)
(1) Input the adjustment signal of VGA (60Hz)
format into RGB2 [D-sub] input terminal.
the adjustment signal
[Note] Never adjust without use of the specified signal.
If that were done by mistake, the picture would become abnormal in black level, contrast and color.
In this case, it will be recovered by re-adjustment in the specified way.
Item AUTOMATIC SIGNAL LEVEL ADJ USTMENT –RGB (2)
(1) Input the adjustment signal of 576p or 480p
format into AV1 input terminal.
the adjustment signal
[Note] Never adjust without use of the specified signal.
If that were done by mistake, the picture would become abnormal in black level, contrast and color.
In this case, it will be recovered by re-adjustment in the specified way.
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Preparation
The signal level of black area
should be pedestal level.
This signal must not be inserted
characters etc.
Black White
0.7V
Preparation
The signal level of black area
should be pedestal level.
This signal must not be inserted
characters etc.
Black White
0.7V
28LD5200E (PW1L)
(1) Select RGB2 and enter the service adjustment
mode.
(2) Select No.740 "RGB Amp. Gain ADJ." and press
OK button for more than 2 seconds to start the
adjustment.
It will complete the adjustment after the OSD of
"AUTO MODE" disappeared.
(1) Select AV1 and enter the service adjustment mode.
(2) Select No.740 "RGB Amp. Gain ADJ." and press
OK button for more than 2 seconds to start the
adjustment.
It will complete the adjustment after the OSD of
"AUTO MODE" disappeared.
(3) Select No.741 "RGB Amp. Gain ADJ." and press
OK button for more than 2 seconds to start the
adjustment.
It will complete the adjustment after the OSD of
"AUTO MODE" disappeared.
16
Procedure
Procedure