Hitachi 42PD8900TA Service Manual page 34

Item
Preparation
(1)
Input RGB amplitude adjustment signal of VGA
(60Hz) into RGB2 [D-sub] terminal.
Black pattern: Set pedestal level.
Characters must not be inserted
into this signal.
0.7V
[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
Preparation
(1) Input 576p or 480p adjustment signal
into AV1 terminal.
Black pattern: Set pedestal level.
Characters must not be inserted
into this signal.
0.7V
[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.
42PD8900TA
RGB Amplitude Adjustment (PC D-Sub input)
Black White
RGB Amplitude Adjustment (Main)
Black White
Procedure
(1)
Receive PC signal (VGA [60Hz]), and indicate
Service Adjustment Menu.(Main)
(2)
Select No.897 of Service Adjustment Menu.
Press [OK] key more than 2 seconds to start the
automatic adjustment.
The adjustment completes when the OSD
reappears.
Procedure
(1) Receive 576p or 480p adjustment signal on AV1
terminal input.
Indicate Service Adjustment Menu.
(2) Select No.897 (RGB amplitude gain adjustment
Main) of Service Adjustment Menu.
Press [OK] key more than 2 seconds to start the
automatic adjustment.
The adjustment completes when the indication
[Auto Mode] at the bottom of the screen
disappears.
34