The Lifter Fails To Move Up (Pickup From Cassette) - Canon iR8500 Service Manual

CHAPTER 6 TROUBLESHOOTING

4.1.82 The lifter fails to move up (pickup from cassette)

Cassette size detecting switch
1) Is the size of the cassette indicated on the message display?
NO:
Latch assembly (cassette)
2) Is the operation for the open button assembly of the cassette nor-
NO:
Spring lever
3) Push up the pickup roller releasing lever with your finger. Does the
NO:
Cassette open/closed sensor
4) When the cassette is inserted, is the voltage at the following connec-
NO:
Lifter motor, DC controller PCB
5) Turn on the main power switch and the control panel power switch.
YES: Remove the lifter motor assembly, and check the gar; if normal,
NO:
6-136
Check the cassette size detecting switch.
mal?
Mount the button assembly properly.
pickup roller move down?
Remove the pickup assembly, and check the spring and the lever.
tors on the DC controller PCB about 5 V?
Cassette 3 (PS40): J515-B5
Cassette 4 (PS45): J517-B5
Check the sensor flag and the wiring; if normal, replace the sensor.
Set the meter range to 30 VDC. Connect the − − − − − meter probe to GND,
and connect the + meter probe to the following jacks. When the cas-
sette is inserted, does the voltage change from about 0 to 24 V?
Cassette 3 (M16): J516-A4
Cassette 4 (M17): J516-B1
replace the motor.
Replace the DC controller PCB.
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001