Sony TRINITRON KV-XA25M30A, Руководство по обслуживанию

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KV-XA25M30A/XA29M30A
RM-952
(3) Screen-corner Convergence
Fix a Permalloy assy corresponding to the misconverged
areas.
4-3. FOCUS ADJUSTMENT
Focus adjustment should be completed before W/B adjustment.
b a
c d
a-d : screen-corner
misconvergence
a
b
c
d
Permalloy assembly
FOCUS ADJUSTMENT
1) Receive digital monoscope pattern.
2) Set "AV CONTROL" to "DYNAMIC"
3) a) Adjust FOCUS VR so that center of the screen becomes
just focus.
4) Change the receiving signal to white pattern and blue back.
5) Confirm MAGENTA RING is not noticeable,
Incase magenta is very obvious, adjust a FOCUS VR to take
balance between MAGENTA RING and FOCUS.
FLYBACK TRANSFORMER (T503)
Screen
Focus
2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 5-1: ADJUSTMENTS
WITH COMMANDER).
2) Input white raster signal.
3) Set the PICTURE to minimum.
4) Select GCT (WHB 4) and BCT (WHB 5) with
[1]
and
[4]
,
and adjust the level with
[3]
and
[6]
for the best white bal-
ance.
5) Set the PICTURE to maximum.
6) Select GDR (WHB 1) and BDR (WHB 2) with
[1]
and
[4]
,
and adjust the level with
[3]
and
[6]
for the best white bal-
ance.
7) Write into the memory by pressing
[MUTING]
then
[0]
.
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
[1]
and
[4]
, and adjust SBR (WHB7)
level with
[3]
and
[6]
so that the second stripe from the right
is dimly lit.
4-4. 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.
White
second from the right
Black
Cathode setting voltage:
180 V ± 2 (VDC)...29"