Xerox PHASER 6121MFP - Fuser Failure and 0503 Thermistor Failure

Phaser 6121MFP Service Manual 3-79
Error Messages and Codes
0500 Fuser Failure and 0503 Thermistor Failure
The thermistor does not detect the specified temperature and the warm-up cycle
is not completed even after the lapse of a given period of time.
Initial Actions
Power down and reboot the printer.
Procedure
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Fuser, PL4.0.13
■ Engine Control Board, PL13.0.20
■ Power Supply, PL13.0.17
■ Board Locations (page 2-10)
■ Map 1 - Engine Control Board
Plug/Jack Locator (page 10-5)
■ Power Supply Wiring (page 10-17)
Troubleshooting Procedure Table
Step Action and Questions Yes No
1 Check that the Fuser is installed
correctly and reseat it.
Does the problem persist?
Go to step 2 Complete.
2 Change the Fuser (page 8-9), and then
turn the printer on, open the top cover,
and press the following keys in this
order: 2 > 6 > 2 > 3 > 7. Turn the printer
off and then back on.
Does the problem persist?
Go to step 3. Complete.
3 Replace the Engine Control Board
(page 8-59).
Does the problem persist?
Go to step 4. Complete.
4 Replace the Power Supply (page 8-72). Complete.