Xerox Phaser 7400

3-112 Phaser 7400 Color Printer Service Manual
Fuser Fan Failure
The Fuser Fan rotation signal indicates that the fan is no longer operational.
Applicable Status Code:
Code U32: Fuser Fan Failure
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Fuser Fan, PL2.1.111
■ IDFAN harness, PL5.1.31
■ Engine Control Board, PL1.1.4
■ Print Engine Map 7 (page 10-10)
■ Print Engine Map 8 (page 10-11)
■ Print Engine Imaging Unit Sensor Board (page 10-41)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the following for evidence of fault or
damage:
■ Fuser Fan
■ P/J250
■ FSRFAN Harness
Is there any damage?
Replace any
damaged parts.
Go to Step 2.
2
Check the Fan connection.
Is P/J250 on the printer frame securely
connected?
Go to Step 3. Connect the Fan.
3
Check for +24 V at the Fan connector.
Disconnect the P/J250.
Is there +24 V between J250-1 <=>
ground?
Replace the Fuser
Fan (
page 8-149).
Go to Step 4.
4
Check for +24 V at the IDFAN connector.
Disconnect IDFAN from the Imaging Unit
Sensor Board.
Is there +24 V between IDFAN-7 <=>
ground?
Go to Step 5. Go to Step 6.
5
Check continuity of the FSRFAN Harness.
Disconnect IDFAN and P/J250.
Is the wiring harness conductive?
Replace the Fuser
Fan (
page 8-149).
Replace the
harness.
6
Check continuity of the CTG1 Harness.
Is the wiring harness conductive?
Replace the Engine
Control Board
(
page 8-112)
Replace the
harness.