Hitachi 55PMA550 Service Manual page 26

Item AUTOMATIC SIGNAL LEVEL ADJUSTMENT –VIDEO
Applicable Model
Preparation
(1) Input the adjustment signal of 576p or 480p
format into AV1 input terminal.
the adjustment signal
The signal level of black area
should be pedestal level.
This signal must not be inserted
characters etc.
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.
55PMA550/55HDM71 (PW1)
55PMA550 , 55HDM71
Black White
(1) Select AV1 and enter the service adjustment mode.
(2) Select No.743 "Automatic White peak Adj. (Multi)"
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.
26
Procedure