Oki PACEMARK 4410 Service Manual page 210

2.3 Local Test
2.3.1 Circuit test mode
2.3.1.1 Setting
(1) Diagnostic test (set by menu)
(2) Test connector
Connect the test connector shown in Figure B-3-6 to the interface connector
Equivalent to Cannon DB-25P
Figure B-3-6 Test Connector Connection Diagram
2.3.1.2 Function
After the settings outlined in Section 3.3.1.1 are completed and power is turned on, the serial
interface checks the message buffer memory and interface driver/receiver circuit. It then prints
characters.
To start and stop this test, push the SEL switch on the front of the printer.
Details of this test are explained on the next page.
2
TD
3
RD
4
RTS
5
CTS
8
CD
11
SSD
20
DTR
6
DSR
153