Canon iR8500 Servise Manual page 408

Manual tray feeding clutch (CL18)
6) Execute the following in service mode. Is the sound of the clutch
NO:
Multifeeder pickup latch solenoid (SL6)
7) Execute the following in service mode. Does the multifeeder pickup
NO:
DC controller PCB
8) Try replacing the DC controller PCB. Is the problem corrected?
YES: End.
COPYRIGHT© 2001 CANON INC.
(CL18) heard?
COPIER>FUNCTION>PART-CHK>CL16
↓ ↓ ↓ ↓ ↓
OK
↓ ↓ ↓ ↓ ↓
COPIER>FUNCTION>PART-CHK>CL-ON
↓ ↓ ↓ ↓ ↓
OK
Check the wiring; if normal, replace the clutch (CL18).
(J513-A6, -A7 on DC controller PCB)
roller move up/down?
COPIER>FUNCTION>PART-CHK>SL5 (up)
COPIER>FUNCTION>PART-CHK>SL6 (down)
↓ ↓ ↓ ↓ ↓
OK
↓ ↓ ↓ ↓ ↓
COPIER>FUNCTION>PART-CHK>LS-ON
↓ ↓ ↓ ↓ ↓
OK
Check the wiring and the link; if normal, replace the solenoid
(SL6). (J510-10, -11, -12 on controller PCB)
2000 2000 2000 2000
CHAPTER 6 TROUBLESHOOTING
CANON iR8500 REV.0 MAR. 2001
6-139