Canon Color Bubble Jet BJC-5000 Series, Service Manual

Page: 143 / 161

Part 5: Maintenance
BJC-5000
5-25
<Cause>
• The paper feed operation is executed but the paper
is not fed.
• The paper eject operation is executed but the
paper is not ejected.
<Suspected Parts>
Sheet feeder unit, pick-up roller sensor,
paper end sensor, logic board.
<Corrective Action>
12. Paper Feed
Error/Paper
Jam
Yes
No
Yes
No
Yes
No
Visual check of the
paper feed mechanism
Correct ?
Check the paper feed
operation.
Check the paper feed
operation.
Correct ?
Correct ?
Check the sheet feeder unit.
Yes
Correct ?
Repair/replace
a faulty part(s).
Repair/replace
a faulty part(s)
No
Replace the logic board.
Next
Page
Replace the
sheet feeder unit.
Check/Replace the paper
feeder motor drive
switching section.
During initialization, do the paper feed motor,
pick-up roller, feed roller, eject roller, etc., rotate?
Any abnormal noises?
Is the paper feed motor out of synchronization?
Is the paper fed properly from the sheet feeder
when the pick-up roller rotates?
Remove the sheet feeder unit,
and operate it with your hands
to check. Check any
contamination, wear or
deterioration of the rubber
ring or separation sheet
of the pick-up roller, and
deformation or damage
of a gear, etc.
Check for deformation or damage
of each gear and the slide lock lever,
and removed springs. See
Part 4
“3.4.2 Paper Feed Motor Power Switching
Section” on page 4-29
.
With your eyes, check for paper jams.
Check for gear deformation or damage.