34 Chapter 1 Troubleshooting control panel messages EN
50.7 FUSER ERROR
(continued)
4 If the error persists, Observe the drive shaft of M1 while powering
on the printer. If this shaft DOES NOT rotate, your failure is related
to the motor drive circuitry. Referring to the printer’s wiring
diagram, verify that connectors J102 and J106 of the feed PCB are
firmly seated. If the error still persists, replace the fusing motor and
the feed PCB in sequence.
5 If the shaft rotates (both forward and reverse), and the 50.7 fuser
error appears, the cause of the error is related to the motion
feedback circuitry. Remove the fusing assembly and verify the
sensor flag is in good condition and functional. Verify the connector
at sensor PS6 is firmly seated. Clean the sensor of dust and debris.
If the error persists replace sensor PS6
51 LASER ERROR (4500)
-or-
51.X PRINTER ERROR (4550)
Indicates a beam detect error or laser failure.
1 Turn the printer off and on to reset the printer.
2 Verify connectors J1102 on the laser driver PCB and J1008 on the
DC controller are seated properly.
3 Verify connectors J551 on the beam detect PCB and J1006 on the
DC controller are seated properly.
4 Replace the laser/scanner unit.
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