The Lifter Fails To Move Up - Canon iR8500 Servise Manual

CHAPTER 6 TROUBLESHOOTING

4.1.75 The lifter fails to move up

Gear lever
1) Remove the deck, and move the lifter by hand. Does it move
NO:
Spring lever
2) Push up the pickup roller releasing lever with your finger. Does the
NO:
Deck open/closed sensor
3) Slide in the deck. Is the voltage of the following connector on the
NO:
Deck limit sensor
4) Check the voltage of the following connectors on the DC controller
NO:
Lifter motor, DC controller PCB
5) Turn on the main power switch and the control panel power switch.
YES: Replace the deck liter motor.
NO:
6-136
smoothly?
Remove the pickup assembly, and check the gears and the levers.
pickup roller move down?
Remove the pickup assembly, and check the spring and the lever.
DC controller PCB about 5 V?
Right deck (PS24): J511-B5
Left deck (PS33): J518-B2
Check the sensor flag and the wiring; if normal, replace the sensor.
PCB. Is it about 0 V?
Right deck (PS23): J511-B8
Left deck (PS34)
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 the + probe to the connector of the DC controller PCB. When
the deck is slid in, does the voltage change from about 0 to 24 V?
Right deck (M13): J514-A4
Left deck (M14):
Replace the DC controller PCB.
COPYRIGHT© 2001 CANON INC.
J518-A5
J514-B1
2000 2000 2000 2000 CANON iR8500 REV.0 MAR. 2001