Canon Troubleshooting Image Malfunctions for IR 3300 Copier

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.21The copy is completely blank.

Developing assembly

1)Is the developing assembly locked to the photosensitive drum during copying?

NO: Check the locking mechanism of the developing assembly.

Developing assembly drive mechanism

2) Is the developing cylinder rotating during copying?

NO: Check the drive mechanism of the developing assembly.

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: Check the mounting condition.

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:

•Connect the cord properly.

•Replace the transfer high-voltage cord.

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: Check the wiring; if normal, replace the reader controller PCB.

4-24 T COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001