2-3.4. Screen Corner Convergence; 2-3.5. Dynamic Convergence Adjustments; Focus Adjustment; Screen (G2) - Sony TRINITRON KV-42DRC700 Service Manual

2-3.4. SCREEN-CORNER CONVERGENCE
Preparation:
• Input a cross hatch pattern signal.
1. Affi x a permalloy assembly corresponding to the misconverged areas.
b
d
2-3.5. DYNAMIC CONVERGENCE
ADJUSTMENTS
Set dynamic convergence using the following service mode adjustment
data.
CXA8070AP
NO. Register Function Data Length Initial Data
1 YBWU VCA9
2 YBWL VCA10
3 RSAP DC-AMP1
4 RUBW VCA5
5 RLBW VCA6
6 LSAP DC-AMP2
7 LUBW VCA10
8 LLBW VCA2
1. YBWU (Upper Y-BOW)
B R B R
2. YBWL (Bottom BOW)
B R B R
3. RSAP (Right AMP)
R B
4. RUBW (Right Side Upper C-BOW)
B R
a
a b
a-d: screen-corner
misconvergence
c d
c
0-63 31
0-63 31
0-63 31
0-63 31
0-63 31
0-63 31
0-63 31
0-63 31
5. RLBW (Right Side Bottom C-BOW)
6. LSAP (Left AMP)
B R
7. LUBW (Left Side Upper C-BOW)
B R
8. LLBW (Left Side Bottom C-BOW)
B R

2-4. FOCUS ADJUSTMENT

1. Input a dot signal.
2. Set Video Mode to STANDARD.
3. Adjust focus VR counter-clockwise to confi rm that the dot's shape is
centered.
4. Input a HP monoscope signal.
5. Confi rm center focus with focus VR.
FOCUS

2-5. SCREEN (G2)

1. Input a monoscope pattern (NTSC).
2. Set to service mode and adjust as follows:
CXA2150P-2
NO. Disp.
0 ALBK
3. Adjust RV9002 on the C Board so that the voltage on red, green and
blue cathodes is 175 ± 2 VDC.
4. Adjust the hotizontal line at the top of the screen so it is cut off.
Note: Never set ALBK to 1 when external power supply is connected
to cathode.
— 13 —
R B
DOT SHAPE:
Item Avg.
ALL_BLK 0
KV-42DRC700