Hitachi 51F710, Service Manual

Page: 22 / 41

22
DP45
2.15 Sub Picture Signal Amplitude Adjustment
Adjustment preparation
(1) Sub-brightness adjustment should be finished.
(2) Start adjustment about 20 minutes after the power
switch is turned on.
(3) Condition should be as follows:
Contrast : Max
Brightness : Center
(4) Press PIP button on R/C unit. Select Split mode.
(5) Receive ANT A NTSC white signal (amplitude
1. 0Vp-p), main-picture and sub-picture. (Do not use
Video/S-Video/YP
B
P
R
/DVI.)
(6) Connect probe on the P852(CPT P.W.B.-Green) to
check sub-picture amplitude.
Adjustment procedure
(1) Go to “SUB CONT(TV-S)” adj. on the I
2 C service
mode.
(2) Press “PIP” button and “PIP Mode” button of R/C.
(3) Observe P852 on the CPT P.W.B. and change the
“SUB CONT(TV-S)” I 2 C data so that the amplitude of
the sub-picture is the same level as that of the main
picture.
DISPLAY
Main Picture
Press “PIP” button
and “PIP Mode”
button
ADJUST MODE
SUB CNT **
V SIZE **
H SIZE **
EW PARA **
EW TRAP **
OSD
AFC
MEMORY INIT
I2COPEN
P MODE ADJ
E2PROM edit
Main Picture
SPLIT
MAIN
ANT A
SUB
ANT A
Wave form of P852 (Green Cathode)
BACK TO ADJUSTMENTS