5-10 Phaser 8400/8500/8550/8560 Color Printer Service Manual
Print-Quality Troubleshooting
3 Check thermal regulation of the Drum.
Run the Service Diagnostics Drum Thermal
Check test, see
“Temperature Status” on
page 4-47.
Are the Drum thermal values out of the
appropriate range?
Go to Step 4. Go to Step 5.
4 Check the Drum Fan for correct installation
and operation.
Go to Step 5. Replace the
Drum Fan.
5 Check that the Drum Temperature Sensor is
in contact with the Drum.
Clean or replace the Drum Temperature
Sensor.
Did this correct the problem?
Complete. Replace in the
following
order:
■ Drum
Heater Relay
Board
■ Drum
Assembly
■ Electronics
Module
Color is Uneven or Wrong Troubleshooting Procedure (Continued)
Step Questions and Actions
Yes No
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