Casio CE-6000

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6-8. RS232C port COM1 circuit
The COM1 circuit is as follows:
The COM1 port pin location is as shown below:
6-9. Keyboard selection switch (Not mounted for CE-6000)
The main PCB has the keyboard selection switch to detect the keyboard type.
For the model CE-6000, the switch is not mounted. It is fixed as a stroke key type.
Keyboard selection switch
(Not mounted for CE-6000)
Signal Pin
CD 1
RxD 2
TxD 3
DTR 4
GND 5
DSR 6
RTS 7
CTS 8
CI 9
1 2 3 4
5
6
7
8 9