Service Guide 51
No fuser roll installed message when it is
1. Ensure that the fuser roll is correctly installed.
2. Check the fuser’s connection and wiring.
3. Check the wiring harness leading to the fuser power connector.
4. Replace the fuser.
5. Replace the engine control board.
Front door open when it is closed
1. Inspect that the front door’s interlock for damage.
2. Inspect the cartridge selector/eject unit interlock mechanism for damage.
3. Inspect the front door cartridge selector/eject unit interlock mechanism. Ensure
that when the interlock is actuated by the cartridge selector/eject unit being
closed, the interlock switch, mounted on the toner cartridge drive unit, closes
(with an audible click).
4. Replace the interlock switch.
5. Replace the power supply.
6. Replace the engine control board.
Left-side door open message when it is not
The procedure for troubleshooting this problem applies to the Lower Tray Assembly
as well.
1. Is the left door open switch, located in the lower-left back corner of the printer,
properly in place?
2. Does closing the left door actuate the left door open switch?
3. Is the left door properly in place? Replace the door if it does not operate
correctly.
4. Is the left door open switch’s wiring harnesses properly connected to the engine
control board (CN3 – 24V interrupt)? In the case of the Lower Tray Assembly, is
the printer properly seated onto the Lower Tray Assembly with good electrical
connection. Try reseating the printer. Check the lower feeder’s wiring harness
to the engine control board at connector CN19.
5. Replace the left door open switch.
6. Replace the engine control board.
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General