Brother DP-525CJ - Page 115

REPAIR
Troubleshooting
SERVICE MANUAL
3-52
2) The test connector to be used in the echo-back test is indicated below.
(Output)
(Input)
(Input)
(Output)
(Output)
TXD
RXD
(Input)
(Input)
DSR
CD
CTS
RTS
7
7
8
8
1
1
4
4
6
6
3
3
2
2
DTR
Machine Terminal Test Connector