Xerox Phaser 8400 Service Manual page 236

Step Questions and Actions
4
1. Ensure the drum fan is correctly installed
and operates correctly.
5 1. Verify the drum temperature sensor is in
contact with the drum.
2. Clean or replace the drum temperature
sensor.
3. Did this correct the problem?
5-10
Yes
Go to Step 5.
Complete.
Phaser 8400/8500/8550 Color Printer
No
Replace the
drum fan.
Replace in the
following order:
■ Drum heater
relay board
■ Drum
assembly
■ Electronics
module