Canon iR5000 Service Manual page 638

Laser unit, DC controller PCB
3) Try replacing the laser unit. Is the problem corrected?
YES: End.
NO:
4.1.14 E100
BD PCB
1) Try replacing the BD PCB. Is the problem corrected?
YES: End.
Laser output
2) Try replacing the laser unit. Is the problem corrected?
YES: End.
Laser scanner unit, DC controller PCB
3) Try replacing the laser unit. Is the problem corrected?
YES: End.
NO:
4.1.15 E110
Connectors
1) Is the connector (J116) on the DC controller PCB connected se-
NO:
Connector
2) Open the manual feed cover, and remove the developing assembly
NO:
Laser scanner unit, DC controller PCB
3) Try replacing the laser scanner unit. Is the problem corrected?
YES: End.
NO:
4.1.16 E121
Foreign object
1) Is there a foreign object that hinders the rotation of the fan in the
YES: Remove the foreign object.
COPYRIGHT © 2000 CANON INC.
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Check the wiring; if normal, replace the DC controller PCB.
Check the wiring; if normal, replace the DC controller PCB.
curely?
Connect the connector securely.
locking plate. Is the relay connector (5-pin) behind the laser scan-
ner plate connected securely? (Do NOT detach the lid of the laser
scanner unit.)
Connect it securely.
Check the wiring; if normal, replace the DC controller PCB.
rotating mechanism of the controller cooling fan?
2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000
4-25 T