3 Turn off the printer and unplug the power cord.

•Remove fuse FH2, which is mounted to the signal interface board, and check for continuity.

Is there continuity?

No: Install a new fuse and retest. If the fuse is okay, turn to TAG 002: Check & Problem Resolution . If the new fuse fails, replace the signal interface board or attachment option and install a new fuse, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

4 Disconnect the interface cable from the printer.

•Disconnect any attachment option.

•Install the RS-232C and RS-422 wrap connectors.

•Run diagnostic test 103.

Did the diagnostic test run properly?

No: Continue.

Yes: Go to #11 in this TAG.

5 Turn the printer off and unplug the power cord.

•Inspect J/P71 (RS-232C), J/P72 (RS-422), and J/P74 for connector body cracks or damaged pins.

Is there a problem with the connectors or pins?

No: Go to #7 in this TAG.

Yes: Continue.

6 Replace the signal interface board.

•Run diagnostic test 103.

Did the diagnostic test run properly?

No: Continue.

Yes: The signal interface board was at fault. Turn to TAG 002: Check & Problem Resolution.

7 Open the back cover and install an interlock by-pass tool.

•Power-on-reset the printer.

•Check J/P32-10 for +12 Vdc.

Is the voltage +12 Vdc?

No: Repair or replace the connectors or wiring from P8-6 to P32-10, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

8 Check J/P32-3 for -12 Vdc.

Is the voltage -12 Vdc?

No: Continue.

Yes: Replace the signal interface board, then turn to TAG 002: Check & Problem Resolution. If this does not resolve the problem, replace the IGS board, then turn to TAG 002: Check & Problem Resolution.

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Troubleshooting Analysis Guide (TAGs)