Canon iR8500 - E012; E013

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
CHAPTER 6 TROUBLESHOOTING
6-97
4.1.8 E012
Relay PCB, Drum motor (M0)
1) Turn on the power stitch, and check to see that all covers are closed.
Is the voltage between J1721-9 and -10 on the relay PCB 38 V?
NO: Check the connection of the cable to the relay PCB; if normal, re-
place the relay PCB.
DC controller PCB
2) When the Start key is pressed, does the voltage between J512-B10
(+) and J512-B8 (–) on the DC controller PCB change from 0 to 5
V?
NO: Check the cable connection to the DC controller PCB; if normal,
replace the DC controller PCB.
Connector
3) Are the connectors J601 and J602 on the drum motor connected
firmly?
NO: Connect the connectors.
YES: Replace the drum motor.
4.1.9 E013
Waste toner feedscrew (locking)
1) Does the waste toner feedscrew drive gear push the waste toner
feedscrew lock detecting switch (MSW2)?
NO: It is likely that the feedscrew inside the waste toner pipe is pre-
vented from rotating. Remove the waste toner pipe, and try turning
the screw by hand. If it turns easily, mount it back again and see if
the problem is corrected. Otherwise, replace the waste toner pipe,
and remove the cause.
MSW2, DC controller PCB
2) Make the following selections in service mode: COPIER>I/O>DC-
CON>. Is bit 6 of P003 ‘0’ (toner clogging)?
YES: Replace MSW2.
NO: Replace the DC controller PCB.