Sony TRINITRON KV-ES34M90, Service Manual

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KV-ES34M90
RM-916
3. SUB PICTURE BRIGHTNESS ADJUSTMENT
1) Tune RF PAL white signal at program No. 1 and No. 2.
2) Select “TWIN PICTURE” mode.
3) Receive different RF PAL white signals in MAIN and Sub
picture.
4) Adjust RV3300 on A PWB, so that the output from the 17 pin
and 20 pin of the CN1180 becomes within the spec.
CVBS 1
17 pin
MAIN
A
CVBS 2
20 pin
SUB
B
Spec: |A - B|
≤
± 20mV
4-5. 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 flyback return
lines disappear (to the point before cut-off).
0 V
2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 5-1: 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
[1]
and
[4]
, and
adjust the level with
[3]
and
[6]
for the best white balance.
5) Set the PICTURE to maximum.
6) Select GDR (WHB 4) and BDR (WHB 5) with
[1]
and
[4]
, and
adjust the level with
[3]
and
[6]
for the best white balance.
7) Write into the memory by pressing
[MUTING]
then
[0]
.
170 V ± 2 (VDC)