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14 —
KV-32S42/32S66/32V42/35S42/35S66/35V42
3-4. SCREEN (G2)
1.
Input dot pattern from the pattern generator.
2.
Set the PICTURE and BRIGHT controls at normal.
3.
Adjust S BRT, G CUT, B CUT in service mode with an oscillo-
scope so that voltages on the red, green, and blue cathodes are
170Vdc ± 2.0Vdc for 35" and 180Vdc ± 2.0Vdc for 32".
4.
Observe the screen and adjust SCREEN (G2) VR
to obtain the faintly visible background of dot signal.
pedestal
GND
170Vdc
170 V dc/ 180 V dc
3-5. WHITE BALANCE ADJUSTMENTS
NO.
Disp.
Item
Avg/32"
Avg/35"
16
GDRV
Green Drive
33
45
17
BDRV
Blue Drive
33
45
18
GCUT
Green Cut-off
3
6
19
BCUT
Blue Cut-off
2
6
23
SBRT
Sub Bright
14
10
1.
Input an entire white signal.
2.
Set to Service adjustment Mode.
3.
Set DCOL to "0"
4.
Set the PICTURE and BRIGHT to minimum.
5.
Adjust with SBRT if necessary.
6.
Select GCUT and BCUT with
1
and
4
.
7.
Adjust with
3
and
6
for the best white balance.
8.
Set the PICTURE and BRIGHT to maximum.
9.
Select GDRV and BDRV with
1
and
4
.
10. Adjust with
3
and
6
for the best white balance.
11. Reset DCOL to "1".
12. Write into the memory by pressing
then
**.
Dynamic Convergence Adjustment
Before starting, perform Horizontal and Vertical
Static Convergence Adjustment.
1.
Slightly loosen deflection yoke screw.
2.
Remove deflection yoke spacers.
3.
Move the deflection yoke for best convergence as
shown below:
B G R
B
G
R
B
G
R
R
G
B
R G B
B
R G B B G R
B G R
B
G
R
B
G
R
B
4.
Tighten the deflection yoke screw.
5.
Install the deflection yoke spacers.
Screen-corner Convergence
Affix a permalloy assembly corresponding to the misconverged
areas:
a
b
c
d
b
a
d
c
a-d : screen-corner
misconvergence
3-3. FOCUS
Adjust FOCUS control for best picture.
Focus
Screen (G2)
