3-114 Phaser 7400 Color Printer Service Manual
Unsupported Duplex Unit ROM
The installed Duplex Unit does not contain the correct firmware.
Applicable Status Code:
Code U34: Unsupported Duplex Unit ROM
Initial Actions:
■ Reseat the Duplex Unit.
■ 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, PL16.1.0
■ Engine Control Board PL1.1.4
■ Options Map 4 Duplex Unit Controller Board
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the following for evidence of fault or
damage:
■ Duplex Connector
Is there any damage?
Replace any
damaged parts.
Go to Step 2.
2
Check that the Duplex Unit is correctly
installed and fully seated.
Go to Step 3. Reseat the Duplex
Unit
3
Check the Duplex Unit version using the
Service Diagnostics General Status menu.
Is the version current?
Replace Engine
Control Board
(
page 8-112), if the
error persists,
replace the
DUPLEX harness.
Replace the
Duplex Unit.
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