G2 (Screen) And White Balance Adjustments - Sony KV-EX29M87 Service Manual

6-5. G2 (SCREEN) AND WHITE BALANCE
ADJUSTMENTS
1. G2 (SCREEN) ADJUSTMENT
1) Set the PICTURE and BRIGHTNESS to normal.
2) Put to VIDEO input mode without signals.
3) Connect R, G and B of the C board cathode to the
oscilloscope.
4) Adjust BRIGHTNESS to obtain the cathode voltage to the
value below.
5) Whilst watching the picture, adjust the screen VR [RV9002]
located on the C board to the point just before the retrace
lines disappear (to the point before cut-off)
2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 7-1: ADJUSTMENTS
WITH COMMANDER).
2) Input white raster signal.
3) Set the following condition.
PICTURE minimum, BRIGHTNESS 50%
4) Select GCT (WHB 7) and BCT (WHB 8) with
[3]
and adjust the level with
balance.
5) Set the PICTURE to maximum.
6) Select GDR (WHB 4) and BDR (WHB 5) with
[3]
and adjust the level with
balance.
7) Write into the memory by pressing
170 V ± 2 (VDC)
0 V
[1] [4]
and ,
[6]
and for the best white
[1] [4]
and
[6]
and for the best white
[MUTING] [0]
then .
,
– 55 –
KV-EX29M87/EX29N93
RM-963 RM-966