Hitachi 42PD9800TA Service Manual page 25

Amplitude Adjustment (PC D-Sub input)
Item
Preparation
(1)
Input RGB amplitude adjustment signal of VGA
(60Hz) into RGB [D-sub] terminal.
8 Color Bar
(Included 100 IRE
White 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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42PD9800TA (FW1)
(1)
(2)
25
Procedure
Receive PC signal (VGA [60Hz]), and indicate
Service Adjustment Menu.(Main)
Select No.597 of Service Adjustment Menu.
Press [OK] key more than 2 seconds to start the
automatic adjustment.
The adjustment completes when the OSD
reappears.