G2 (Screen) And White Balance Adjustments - Sony Trinitron KV-XG29M90 Service Manual

3-4. G2 (SCREEN) AND WHITE BALANCE
ADJUSTMENTS
1. G2 (SCREEN) ADJUSTMENT
1) Set the PICTURE to normal.
2) Put to VIDEO input mode without signals.
3) Connect R, G and B of the C6 board cathode to the
oscilloscope.
4) Adjust BRIGHTNESS to obtain the cathode voltage to the
value below.
5) Adjust G2 (screen) on the FBT until picture shows the point
before cut off.
Cathode setting voltage:
180V ±2(VDC)...29"
0 V
2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 4-1: ADJUSTMENTS
WITH COMMANDER).
2) Input white raster signal.
3) Set the PICTURE to minimum.
4) Select GCT (WHB 4) and BCT (WHB 5) with
adjust the level with
5) Set the PICTURE to maximum.
6) Select GDR (WHB 1) and BDR (WHB 2) with
adjust the level with
7) Write into the memory by pressing
3. SUB BRIGHT ADJUSTMENT
1) Set to service mode.
2) Input a staircase signal of black to white from the pattern
generator.
3) BRIGHTNESS .... 50%.
PICTURE ............ MINIMUM
4) Select SBR (WHB7) with
[3] [6]
level with and
dimly lit.
White
– 27 –
[1]
and
[3] [6]
and for the best white balance.
[1]
and
[3] [6]
and for the best white balance.
[MUTING]
then
[1] [4]
and , and adjust SBR (WHB7)
so that the second stripe from the right is
second from the right
Black
KV-XG29M90
RM-952
[4]
, and
[4]
, and
[0]
.