The Copy Is Completely Blank - Canon iR2200 Service Manual

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.21 The copy is completely blank.

Developing assembly
1) Is the developing assembly locked to the photosensitive drum during
copying?
NO:
Developing assembly drive mechanism
2) Is the developing cylinder rotating during copying?
NO:
3) Is the image of the test print (PG>TYPE; 1 through 8) normal?
YES: Go to step 10.
Transfer charging roller
4) Is the transfer charging roller mounted properly?
NO:
5) Is leakage noted on the transfer charging roller?
YES: Check the transfer charging roller.
Transfer high-voltage cord
6) Is the connection of the transfer high-voltage cord normal? Is there elec-
trical continuity in the transfer high-voltage cord? (The resistance of the
transfer high-voltage cord is about 10 kΩ.)
NO:
•
•
DC controller PCB
7) Try replacing the DC controller PCB. Is the problem corrected?
YES: End.
Composite power supply PCB
8) Try replacing the composite power supply PCB. Is the problem cor-
rected?
YES: End.
Power supply (to CCD PCB)
9) Is about 12 VDC present on J602-1 of the CCD PCB? Is about 5 VDC
present on J602-4?
NO:
4-24 T
COPYRIGHT © 2001 CANON INC.
Check the locking mechanism of the developing assembly.
Check the drive mechanism of the developing assembly.
Check the mounting condition.
Connect the cord properly.
Replace the transfer high-voltage cord.
Check the wiring; if normal, replace the reader controller PCB.
2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001