Duplex Unit Clock Frequency Error - Xerox Paser 7400 Service Manual

Duplex Unit Clock Frequency Error

The clock frequency for the Duplex Unit Control Board CPU is inaccurate.
Applicable Status Code:
Code 931:
The Duplex Unit's CPU clock frequency is inaccurate.
Initial Actions:
Reseat the Duplex Unit.
Cycle the printer's power.
If the problem persists follow the procedure below.
Troubleshooting Reference Table
Applicable Parts
Motor Driver Board
Duplex Unit
Troubleshooting Procedure Table
Step Actions and Questions
1 Check the Duplex Unit connector for
damage.
Is the connector damaged?
2 Check all pins on the DUPLEX Harness for
continuity.
Disconnect the DUPLEX Harness.
Is the DUPLEX Harness conductive?
3
Check all pins of the DRV1 harness for
continuity.
Disconnect the DRV1 ribbon cable.
Is the cable conductive?
3-84
Wiring and Plug/Jack References
Print Engine Map 3 (see Book 1)
Print Engine Map 5 (see Book 1)
Print Engine Motor Driver Board (5/6) (see Book 1)
Print Engine Motor Driver Board (6/6) (see Book 1)
Options Map 4 Duplex Unit Controller Board
Phaser 7400 Color Printer Options Service Manual
Yes
Replace the
connector.
Replace the Duplex
Unit (page 5-122). If
the error persists,
go to Step 3.
Replace the Engine
Control Board (see
Book 1).
No
Go to Step 2.
Replace the
DUPLEX Harness.
Replace the DRV1
Harness.