Casio CTK-541 Service Manual page 11

3) Equipment connection/Procedure
Input Input
Connection Point
Eye
50°
LCD
Vop voltage setting
Set
Output
CP3-CP4
Input Output
Adjust
Signal Connection
VR1
Watching the LCD at a 50° angle to the horizontal, adjust Vop
voltage so that unenergized segments are seen dimly.
— 9 —
Voltmeter
Output
Point
Voltmeter CP3-CP4 Adjust for 3.90 ~ 4.00V read-
ing on voltmeter under the
temparature 20 ~ 25 °C.
Make fine adjustment accord-
ing to the following instruc-
tion.
Adjust for