Document # 720003-0000
December 2015
22
SPILL PROOF / SPILL PROOF CUTS
Service Manual
3 Troubleshooting the Printer
Pin designation of Communication Interfaces
RS-232 (DB-9) receptacle
Pin
Signal Name
Printer I/O
Host I/O
Printer Function
1 AUX_PWR
5V
Output n/a
Aux Power (100mA)
2 RS232_TXD
Output
Input
Data
transmit
3 RS232_RXD
Input
Output Data
receive
4 RS232_CTS
Input
Output Handshaking
5 DGND
Ground Ground Signal Ground/Aux
Ground
6 RS232_RTS
Output
Input
Handshaking
7 RS232_CTS
Input
Output Handshaking
8 RS232_RTS
Output
Input
Handshaking
9
NC or PWR
No connect
No connect
Reserved
Table 7: RS232 receptacle Interface (female)
RS-232 (DB-9) plug
Pin
Signal Name
Printer I/O
Host I/O
Printer Function
1 AUX_PWR
5V
Output n/a
Aux Power (100mA)
2 RS232_RXD
Input
Output Data
receive
3 RS232_TXD
Output
Input
Data
transmit
4 RS232_RTS
Output
Input
Handshaking
5 DGND
Ground Ground Signal Ground/Aux
Ground
6 RS232_CTS
Input
Output Handshaking
7 RS232_RTS
Output
Input
Handshaking
8 RS232_CTS
Input
Output Handshaking
9
NC or PWR
No connect
No connect
Reserved
Table 8: RS232 plug Interface (male)