Home Position - Canon BJC-3000 Service Manual

Part 4: Troubleshooting

6. Home Position

Error
<Measures>
Visual check
OK?
Yes
Power on with the cover
opened
Visual check of the
carriage unit operation
OK?
Yes
Next
Page
<Cause> The home position cannot be detected by the home
position sensor.
<Suspected Parts> Home position sensor, carriage motor, paper
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.
No
Repair/replace faulty
parts
Check for the proper operation of the carriage unit, and that
no part is out of sync.
No
Carriage motor check
Disconnect the carriage motor cable from
the control board to check.
Correct?
Yes
Go to
Page 4-8
(1)
4-6
feed motor, control board, carriage ribbon
cable, carriage board, DC cable
Measuring points Normal Reading
1-3
CN402
Approx. 3.3
2-4
Pin No.
No
Replace the carriage
motor
BJC-3000
1
4