Canon BJC-3000 Series, Service Manual

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<Cause> The home position cannot be detected by the home
position sensor.
<Suspected Parts> Home position sensor, carriage motor, paper
feed motor, control board, carriage ribbon
cable, carriage board, DC cable
<Measures>
Part 4: Troubleshooting BJC-3000
4-6
Visual check
Yes
No
Correct?
Replace the carriage
motor
Visual check of the
carriage unit operation
Repair/replace faulty
parts
Yes
No
OK?
Yes
No
OK?
Power on with the cover
opened
Carriage motor check
CN402
Pin No. 1-3
2-4
Measuring points Normal Reading
Approx. 3.3
Next
Page
Go to
Page 4-8
(1)
Check for paper jams, wear/deterioration/dislocation of the
carriage belt, deformation of the carriage guide frame, scratching/
bending of the guide shaft, etc.
Move the carriage manually and check that it moves smoothly
and there is no abnormal noise or there is no major damage on
the carriage ribbon cable.
Check for the proper operation of the carriage unit, and that
no part is out of sync.
Disconnect the carriage motor cable from
the control board to check.
1
4
6. Home Position
Error