Casio CTK-611, Руководство по обслуживанию

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3) Equipment connection/Procedure
Vop voltage setting
Output
Set Voltmeter
TP2
Input
Connection
Input
Point Input
Signal
Adjust
Output
Connection Output
Point
Adjust for
VR410
Voltmeter TP2
Adjust for 4.3 to 4.4 V read-
ing on voltmeter under the
temparature 20 to 25
°
C.
Make fine adjustment accord-
ing to the following instruc-
tion.
51.74
°
LCD
Eye
Watching the LCD at a 51.74
°
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)
VR401
TP2
Item Measuring Instrument
Vop voltage setting Voltmeter
MC-Service