E020; E025 - Canon iR8500 Service Manual

CHAPTER 6 TROUBLESHOOTING

4.1.13 E020

Toner feedscrew, Toner sensor (TS3)
1) Remove the developing assembly, and detach the top cover of the
YES: Check the toner feedscrew inside the developing assembly for rota-
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2) Make the following selections in service mode:
NO:
Hopper drive clutch (CL1)
3) Check the operation of the hopper motor (M18) in reference to
NO:
YES: Check the following:

4.1.14 E025

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1) Is the toner inside the cartridge uneven?
YES: Rock the cartridge so that the toner inside it is even.
Connector
2) Is the connector (J512) on the DC controller PCB connected
NO:
Drive system, Toner feed motor (M6; inside cartridge)
3) Does the drive mechanism for toner feed inside the cartridge oper-
NO:
YES: Replace the toner feed motor inside the cartridge.
6-100
developing assembly. Is there toner inside the developing assembly?
tion; if normal, replace the toner sensor (TS3).
COPIER>FUNCTION>PART-CHK; then, check the operation of
the hopper drive clutch (CL1). Does the clutch operate normally?
Check the connection; if normal, replace the clutch.
'MTR'. Does the motor operate normally?
Check the connection; if normal, replace the motor.
• Magnet roller inside the hopper for rotation
• Area between hopper and inside the developing assembly for
toner clogging
firmly?
Connect it firmly.
ate smoothly?
Correct the mechanism.
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001