Casio CTK-401, Руководство по обслуживанию

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3) Equipment connection/Procedure
Vop voltage setting
Input
Connection Input
Point Input
Signal
Adjust
Output
Connection Output
Point
Adjust for
VR1 Voltmeter V5
Adjust for 4.3
±
0.1 V reading
on voltmeter.
Make fine adjustment accord-
ing to the next instruction.
53.5
°
LCD
Eye
Watching the LCD at a 53.5
°
angle to the horizontal, adjust Vop
voltage so that unenergized segments are seen dimly.
ADJUSTMENT
MAIN PCB
1) Items to be adjusted:
2) Adjustment and Test Point Locations
(TOP VIEW)
Item Measuring Instrument
Vop voltage setting Voltmeter
Test point
Output
Set Voltmeter
V5