E012; E013 - Canon iR8500 Servise Manual

4.1.8 E012

Relay PCB, Drum motor (M0)
1) Turn on the power stitch, and check to see that all doors are closed.
NO:
DC controller PCB
2) When the Start key is pressed, does the voltage between J512-B10
NO:
Connector
3) Are the connectors J601 and J602 on the drum motor connected
NO:
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
NO:
MSW2, DC controller PCB
2) Make the following selections in service mode: COPIER>I/O>DC-
YES: Replace MSW2.
NO:
COPYRIGHT© 2001 CANON INC.
Is the voltage between J1721-9 and -10 on the relay PCB 38 V?
Check the connection of the cable to the relay PCB; if normal, re-
place the relay PCB.
(+) and J512-B8 (–) on the DC controller PCB change from 0 to 5
V?
Check the cable connection to the DC controller PCB; if normal,
replace the DC controller PCB.
firmly?
Connect the connectors.
feedscrew lock detecting switch (MSW2)?
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.
CON>. Is bit 6 of P003 '0' (toner clogging)?
Replace the DC controller PCB.
2000 2000 2000 2000
CHAPTER 6 TROUBLESHOOTING
CANON iR8500 REV.0 MAR. 2001
6-99