Xerox Phaser 7400

Error Messages and Codes 3-103
Transfer Unit Fan Failure
Applicable Status Code:
Code T40: Transfer Unit Fan Failure
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
■ Transfer Unit Fan, PL5.1.48
■ Motor Driver Board, PL2.1.10
■ Print Engine Map 5 (page 10-8)
■ Print Engine Map 7 (page 10-10)
■ Print Engine Motor Driver Board (2/6) (page 10-32)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Test the Transfer Unit Fan.
Run the Service Diagnostics Belt Fan test.
Does the Fan operate correctly.
Replace the Engine
Control Board
(
page 8-112).
Go to Step 2.
2
Check the Fan connection.
Is BELTFAN on the Motor Driver Board
securely connected?
Go to Step 3. Connect the Fan.
3
Check for +24 V at the Fan connector.
Disconnect the Fan from BELTFAN.
Is there +24 V between BELTFAN-1 <=>
ground?
Replace the Fan
(
page 8-134).
Go to Step 4.
4
Check for +24 V at the POW24 connector.
Disconnect the POW24 Harness from the
Motor Driver Board.
Is there +24 V between POW24-1 <=>
ground?
Replace the Motor
Driver Board
(
page 8-141).
Go to Step 5.
5
Check continuity of the POW24 Harness.
Is the wiring harness conductive?
Replace the LVPS
(
page 8-121)
Replace the
harness.