Keyboard Selection Switch - Casio TK-6500 Service Manual

The COM2 port pin location is as shown below:
COM2 port
Signal Pin
NC 1
RxD 2
TxD 3
DTR 4
GND 5
DSR 6
RTS 7
CTS 8
VCC(+5V) 9

6-11. Keyboard selection switch

The main PCB has the keyboard selection switch to detect the keyboard type.
For the model TK-6500, set the switch to " F" position for the stroke key type.
Signal Pin
NC 1
RxD 2
TxD 3
DTR 4
GND 5
DSR 6
RTS 7
CTS 8
NC 9
Keyboard selection switch
Set to " F" position.
- 18 -
1 2 3 4
6 8 9
7
5