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(3) Screen-corner Convergence
b
a-d : screen-corner
misconvergence
c
Fix a Permalloy assy corresponding to the misconverged
areas.
a
d
Permalloy assembly
4-3. FOCUS ADJUSTMENT
Focus adjustment should be completed before W/B adjustment.
Focus
Screen
FLYBACK TRANSFORMER (T503)
a
d
b
c
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.
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.
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
and adjust the level with
ance.
5) Set the PICTURE to maximum.
6) Select GDR (WHB 1) and BDR (WHB 2) with
and adjust the level with
ance.
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
is dimly lit.
White
– 27 –
KV-XA25M30A/XA29M30A
Cathode setting voltage:
180 V ± 2 (VDC)...29"
[1]
[3]
[6]
and
for the best white bal-
[1]
[3]
[6]
and
for the best white bal-
[MUTING]
then
[1]
[4]
and
, and adjust SBR (WHB7)
so that the second stripe from the right
second from the right
Black
RM-952
[4]
and
,
[4]
and
,
[0]
.
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