CANON iR5000/iR6000 REV.0 JULY 2000 2000 2000 2000 2000COPYRIGHT
©
2000 CANON INC.
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
4-18 T
3.21 The print is blank
Reader unit
1) Does the problem occur only in copy images?
YES: Check the connection of the following PCBs; if normal, replace the
PCB.
1. CCD/AP PCB
2. DC controller PCB
Primary charging assembly
2) Make the following selections in service mode:
COPIER>DISPLAY>DPOT.
(Copier) Are the readings <VDM> ± 6V of the <VDT> ?
(Printer) Are the readings <VDM-P> ± 6V of the <VDT-P> ?
NO:
1. Check the primary charging assembly.
2. Check the HVT PCB.
3. Check the potential sensor and the potential control PCB.
Developing assembly locking unit
3) During printing, is the developing assembly locked against the photo-
sensitive drum?
NO: Check the mechanism of the developing assembly locking unit.
Developing assembly drive assembly
4) During copying, is the developing assembly rotating?
NO: Check the drive system for the developing assembly.
Transfer charging assembly
5) Is the transfer charging assembly fitted fully and securely?
NO: Fit it securely.
6) Is leakage found in the transfer charging assembly?
YES: Check the transfer charging assembly.
NO:
1. Replace the DC controller PCB.
2. Replace the main controller PCB.
Download Free Service Manual at http://printer1.blogspot.com
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