Canon BJC6500 Service Manual - Page 78

Replace the Drive, Drive Swiching Unit

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Part 4: TROUBLESHOOTING From previous page Paper End Sensor Paper End Sensor Paper BJC-6500 ASF Feed Path Check the paper end sensor's arm Using paper, check the arm for smooth motion, deformation, or damage. OK? Yes No Replace the sensor arm Paper sensor check Measurement points Sensor Normal value J8 Pin No. 3 Open Low level (paper detected) C l o s e High level (no paper detected) With the printer switched ON, check actuation of the paper end sensor's arm using paper. OK? Yes No Replace the control board Visually check the Drive Swiching Unit Check for displaced gears, missing teeth, and damaged/bent parts. OK? Yes No Replace the Drive Swiching Unit ASF gear position adjustment See Part 2: 2.4.5 How to adjust the ASF gear positon (page 2-14). END 4-14

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Part 4: TROUBLESHOOTING
BJC-6500
4-14
From
previous
page
Check the paper
end sensor's arm
Using paper, check the arm for smooth
motion, deformation, or damage.
Paper sensor check
With the printer switched ON, check actuation of the
paper end sensor's arm using paper.
J8
Pin No. 3
Measurement points
Replace the sensor
arm
Visually check the
Drive Swiching Unit
Replace the Drive
Swiching Unit
ASF gear position
adjustment
Replace the control
board
Open
Close
Sensor
Low level (paper detected)
High level (no paper detected)
Normal value
See
Part 2: 2.4.5 How to adjust the ASF gear positon
(page 2-14).
Yes
No
OK?
Yes
No
OK?
Yes
No
OK?
END
ASF Feed Path
Paper End Sensor
Paper End Sensor
Paper
Check for displaced gears, missing teeth, and
damaged/bent parts.