Xerox Phaser 7400

3-156 Phaser 7400 Color Printer Service Manual
Duplex Unit Flash Memory Failure
Applicable Status Code:
Code 246: Hardware failure with Duplex Unit Flash Memory.
Initial Actions:
■ Cycle the printer's power.
■ If the problem persists follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Duplex Unit
■ Motor Driver Board, PL2.1.10
■ Print Engine Map 5 (page 10-8)
■ Print Engine Motor Driver Board (5/6) (page 10-35)
■ Options Map 4 Duplex Unit Controller Board
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the Duplex Unit connector for
damage.
Is the connector damaged?
Replace the
connector.
Replace the
Duplex Unit. If the
error persists, go
to Step
2.
2
Check all pins on the DUPLEX Harness for
continuity.
Disconnect the DUPLEX Harness.
Is the DUPLEX Harness conductive?
Replace the Motor
Driver Board
(
page 8-141). If the
error persists, go to
Step 3.
Replace the
DUPLEX Harness.
3
Check all pins of the DRV1 harness for
continuity.
Disconnect the DRV1 ribbon cable.
Is the cable conductive?
Replace the Engine
Control Board
(
page 8-112).
Replace the DRV1
Harness.