Printer I/F pin assignment. | |||||
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| Is the correct cable used? | TXD | 2 | pin, |
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| RXD | 3 | pin, |
Yes | No | SSD | 11 | pin, | |
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| DTR | 20 | pin, |
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| Change I/F cable. | DSR | 6 | pin. |
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| Is ALARM LED blinking? |
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No | Yes |
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See tables 6.2 and 6.3 for the troubleshooting.
Make sure of the parameters for RS232C in the menu are correct.
Baud rate
Bit length
Parity
Protocol
Busy signal and its polarity 
Remedied?
No Yes
End
Is + 8V supplied on Driver board?
Yes No
Remove RS232C I/F Board.
Driver Board
20 CN2 1 
••••••••••••••••••••
0V (pin10)
+8V (pin20)
Is the + 8V supplied on the Driver board?
No Yes
Replace RS232C I/F board.
Replace Driver board.
6 – 20
