Casio QT-8000 Service Manual page 61

JUMPER SETTINGS
7-3-2 COM PORT RI & VOLTAGE SELECTION
JP2 : COM1(PIN9), COM2(PIN9), COM3(PIN9), and COM4(PIN9), RI and 5V/12V Voltage Selection
The selections are as follows:
SELECTION
RI
COM1 5V
12V
COM2 RI
JUMPER
SETTING JUMPER ILLUSTRATION
(Pin Closed)
13-14
3-5
1-3
15-16
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