3-82 Phaser 6121MFP Service Manual
Error Messages and Codes
0F51 Waste Toner Failure
It is determined that the LED and photo receiver are faulty through a check made
when a new imaging cartridge is detected.
Initial Actions
Power down and reboot the printer.
Procedure
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Imaging Unit, PL4.0.13
■ Engine Control Board, PL13.0.20
■ Board Locations (page 2-10)
■ Map 1 - Engine Control Board
Plug/Jack Locator (page 10-5)
■ Imaging Wiring (page 10-15)
Troubleshooting Procedure Table
Step Action and Questions Yes No
1 Check the Engine Control Board
connector P/J9.
Is the connector seated properly?
Go to step 2 Reseat the
connector. If
the problem
persists, go to
step 3.
2 Change the Imaging Unit (page 8-6).
Does the problem persist?
Go to step 3. Complete.
3 Replace the Engine Control Board
(page 8-59).
Complete.
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