Canon iR8500 Service Manual page 543

CHAPTER 6 TROUBLESHOOTING
Vertical path 4 clutch, DC controller PCB
5) Execute the following in service mode. Is the sound of the clutch
NO:
YES: Replace the DC controller PCB.
6-140
(CL15) heard?
COPIER>FUNCTION>PART-CHK>CL15
↓ ↓ ↓ ↓ ↓
OK
↓ ↓ ↓ ↓ ↓
COPIER>FUNCTION>PART-CHK>CL-ON
↓ ↓ ↓ ↓ ↓
OK
Check the wiring; if normal, replace the clutch (CL15)
(J517-A3, -A4 on DC controller PCB).
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001