(023-100 intentionally excluded)

103 Communication Loop-back Test (Single Loop)

1Remove the interface cable from the printer.

2Check to make sure the four DIP switches on the signal interface board have been pulled toward the printer’s back cover. Close the back cover.

3Install the RS-232C and RS-422 loop-back connectors, found in the tool kit mounted inside the right printer cover.

If you do not have loop-back connectors, jumper the connections as outlined in Table 5-24,“RS-232 Loopback Connections” and Table 5-25,“RS-422 Loopback Connec- tions” .

Table 5-24. RS-232 Loopback Connections

RS-232 Loopback Connection Reference

pin 2

pin 4

pin 8

pin 17

pin 3

pin 5

pin 20

pin 24

Table 5-25. RS-422 Loopback Connections RS-232 Loopback Connection Reference

pin 2

pin 9

pin 7

pin 14

pin 4

pin 11

pin 6

pin 13

4Go to: 103

5Press: READY to run the test.

6If an error code appears, check the “Error Code/TAG Cross-Reference” on page 2-3to determine which TAG to follow.

7If no error is detected, the test exits automatically.

8Press: STOP to exit, if an error is detected. (For some errors, you may have to power- on-reset the printer.)

9Remove the wrap connectors.

10Reinstall the interface cable.

Diagnostic Tests

5-21

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HP C30 manual Communication Loop-back Test Single Loop