Canon iR8500 Service Manual page 537

CHAPTER 6 TROUBLESHOOTING
Vertical path 1 clutch (CL8),
Vertical path 2 clutch (CL9),
Vertical path 3 clutch (CL13),
Vertical path 4 clutch (CL15),
Pre-registration roller clutch (CL5)
5) Open the right upper cover and the right lower cover, and put pa-
NO:
Registration roller drive clutch
6) Is the leading edge of copy paper as far as the registration roller as-
YES: See "4.1.85 The registration roller fails to rotate."
Pickup assembly
7) Open the right upper cover and the right lower cover, and put a
YES: Go to step 9).
Pickup clutch, DC controller PCB
8) Set the meter range to 30 VDC. Connect the meter probes to the fol-
YES: Check the wiring; if normal, replace the faulty clutch.
NO:
Sensor, Pickup assembly
9) Find out which sensor has detected the jam in service mode:
NO:
YES: Remove the pickup assembly, and check the spring.
6-134
per over the cover open/closed sensor, and press the Start key. Do
the vertical path rollers 1, 2, 3, and 4 and the pre-registration roller
rotate?
Check the wiring; if normal, replace the clutch.
sembly?
screwdriver into the door switch. Does the feed/separation roller ro-
tate when the Start key is pressed?
lowing connectors of the DC controller PCB. Does the voltage
change form 24 to 0 V when the Start key is pressed?
Clutch
Cassette
Right deck CL10
CL11
Left deck
CL12
3
CL13
4
Replace the DC controller PCB.
COPIER>I/O>IP. Is the sensor normal?
Check the wiring and the lever; if normal, replace the sensor.
COPYRIGHT© 2001 CANON INC.
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J511-A1 GND
J518-B7 GND
J515-A1 GND
J517-A1 GND
2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001