Casio CTK-573, Руководство по обслуживанию

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3) Equipment connection/Procedure
Vop voltage setting
Watching the LCD at a 36.1
°
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
(TOP VIEW)
Input
Connection Input
Point Input
Signal
Adjust
Output
Connection Output
Point
Adjust for
VR401 Voltmeter TP1-TP2 Adjust for 4.3 ~ 4.4 V reading
on voltmeter under the tem-
perature 20 ~ 25
°
C.
Make fine adjustment accord-
ing to the next instruction.
Output
Set Voltmeter
TP1
TP2
36.1
°
LCD
Eye
Item Measuring Instrument
Vop voltage setting Voltmeter
TP1 (LSI401 Pin33)
TP2 (LSI401 Pin30)