Casio CTK-631 Service Manual

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3) Equipment connection/Procedure
Vop voltage setting
Output
Set Voltmeter
TP1-TP2
Input
Connection
Input
Point
Input
Signal
Adjust
Output
Connection
Output
Point
Adjust for
VR501 Voltmeter TP1-TP2 Adjust for 4.2 to 4.3 V read-
ing on voltmeter under the
temparature 20 to 25 °C.
Make fine adjustment accord-
ing to the following instruc-
tion.
1Watching the LCD at 32.52° angle to the horizontal, adjust Vop
voltage so that unenergized segments are seen dimly.
2Watching the LCD at 62.23° (upper limit) angle, check to see the
segments completely.
32.52°
62.23°
LCD
Eye
Eye
(upper limit)

Casio CTK-631 Specifications

General

Brand	Casio
Model	CTK-631
Category	Electronic Keyboard
Language	English