Sheet Feeder - Canon QY8-1360-000 Service Manual

BJC-7100

4. Sheet Feeder

Error
Beeper: 8 times
ERROR indicator: Blinks 5 times
<Measure>
Turn on power again.
Visually check operation
of sheet feeder drive.
Does error recur?
Yes
Check operation
of sheet feeder unit.
OK?
Yes
Check platen paper
feed motor drive
transmission gear.
OK?
Yes
Replace logic board.
• Faulty pickup roller
sensor
• Faulty MPU
• Faulty PCB
soldering/conductivity
<Cause>
Sheet feeder not initialized during printer initialization.
<Suspected parts>
• Check the movements of the parts (gears, etc.) inside the sheet
feeder.
No
Turn the power on and
off several times, and quit
if the error does not recur.
• Remove the sheet feeder unit and manually rotate the drive gears
to check that the pickup roller, etc., operates correctly and smoothly.
No
Service/replace
faulty parts.
• Visually check the appearance and operation of the paper feed
rollers and power switching gears, which transmit the power of
the paper feed motor.
• Simultaneously check the operation of the purge unit's slide lock
lever, which locks the power switching unit.
No
Service/replace
faulty parts.
5-19
Part 5: Maintenance
Sheet feeder unit, pickup roller,
sheet feeder drive gear,
paper feed motor drive transmission
gear, slide lock lever, logic board