— 12 —
3) Equipment connection/Procedure
Vop voltage setting
Output
Set
Voltmeter
TP2
Input
Connection
Input
Point
Input
Signal
Adjust
Output
Connection
Output
Point
Adjust for
VR501
Voltmeter
TP2
Adjust for 4.4
±
0.1 V reading
on voltmeter.
Make fine adjustment accord-
ing to the next instruction.
Watching the LCD at a 37.40
°
angle to the horizontal, adjust Vop
voltage so that unenergized segments are seen dimly.
ADJUSTMENT
DISPLAY PCB
1) Items to be adjusted:
2) Adjustment and Test Point Locations
(BOTTOM VIEW)
37.40
°
LCD
Eye
m
e
t
I
t
n
e
m
u
r
t
s
n
I
g
n
i
r
u
s
a
e
M
g
n
i
t
t
e
s
e
g
a
t
l
o
v
p
o
V
r
e
t
e
m
t
l
o
V
TP2 (top side)
VR501
Summary of Contents for WK-1200
Page 16: ...15 SCHEMATIC DIAGRAMS Main PCB JCM730 MA1M 8 7 2 3 1 4 6 5...
Page 17: ...16 Sub PCB JCM730 MA2M 10 9...
Page 18: ...17 Console PCBs JCM730 CN1M CN2M CN3M CN4M...
Page 19: ...18 LCD Driver PCB JCM730 LCD1M...
Page 20: ...19 Keyboard PCBs JCM731T KY1M KY2M KY3M...
Page 25: ...8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 Japan Telephone 03 3347 4926 MA0700571A...
