Thermistor Failure, 0510 Fuser Failure, And 0520 Fuser Failure - Xerox Phaser 6121MFP Service Manual

Error Messages and Codes

0502 Thermistor Failure, 0510 Fuser Failure, and 0520 Fuser Failure

Initial Actions
Procedure
3-80
0502 Thermistor Failure The temperature detected by the thermistor does not
reach an expected level after the warm-up cycle starts.
0510 Fuser Failure The temperature detected by the thermistor remains lower
than expected for a given period of time or longer.
0520 Fuser Failure The temperature detected by the thermistor remains higher
than expected for a given period of time or longer.
Power down and reboot the printer.
Troubleshooting Reference Table
Applicable Parts
Fuser, PL4.0.13
Engine Control Board, PL13.0.20
Power Supply, PL13.0.17
Troubleshooting Procedure Table
Step Action and Questions
1 Check that the Fuser is installed
correctly.
Does the problem persist?
2 Check the Engine Control Board
connectors P/J2, P/J3, and P/J6.
Are the connectors seated properly?
3 Check the Low Voltage Power Supply
connectors CN3, CN5, and CN7.
Are the connectors seated properly?
4
Replace the Fuser (8-9).
Does the problem persist?
5 Replace the Engine Control Board
(page 8-59).
Does the problem persist?
6
Replace the Power Supply (page 8-72).
Wiring and Plug/Jack References
Board Locations (page 2-10)
Map 1 - Engine Control Board
Plug/Jack Locator (page 10-5)
Power Supply Wiring (page 10-17)
Yes No
Go to step 2. Complete.
Go to step 3 Reseat the
connectors. If
the problem
persists, go to
step 3.
Go to step 4. Reseat the
connectors. If
the problem
persists, go to
step 4.
Go to step 5. Complete.
Go to step 6. Complete.
Complete.
Phaser 6121MFP Service Manual