Document Feeding Problems; No Feeding; Double Feeding - Brother DCP-9010CN Service Manual

10. DOCUMENT FEEDING PROBLEMS

Problems related to document feeding are end user recoverable if following the User Check
items. If the same problem occurs again, follow each procedure in the order of the number
described in the Step column in the tables below.

10.1 No Feeding

<User Check>
- Check if the document is inserted correctly to the depths.
- Check whether the document is 35 or less sheets.
- Check if the ADF cover is closed.
Step
1 Document front
actuator catching
on some position
2 Document front
sensor harness
connection failure
3 ADF motor harness
connection failure
4 Document front
sensor malfunction
5 Paper feed roller
failure
6 ADF motor failure
7 Main PCB failure

10.2 Double Feeding

<User Check>
- Check whether the document does not use the paper which is thinner than the specification.
Step
1 Separation roller
failure
2 Separation rubber
worn out
Cause
Does the document front
actuator move smoothly?
Is the harness of the
document front sensor
connected securely
Is the harness of the
ADF motor connected
securely?
Does the document front
sensor move smoothly?
(Check it following the
procedure described in
"Maintenance mode
Is the paper feed roller
rotating although the
ADF motor is rotating?
Is the problem solved
after replacing the ADF
motor?
Is the problem solved
after replacing the main
PCB?
Cause
Is the surface of the
separation roller worn
out?
Is the surface of the
separation rubber worn
out?
3-100
Check
Result
No
No
No
No
32")
Yes
Yes
Yes
Check
Result
Yes
Yes
Remedy
Re-assembly the
document front actuator
Reconnected the
harness of the
document front sensor.
Reconnected the
harness of the ADF
motor.
Replace the ADF
sensor PCB ASSY.
Replace the paper feed
roller ASSY.
Replace the ADF motor.
Replace the main PCB.
Remedy
Replace the separation
roller shaft ASSY.
Replace the separation
rubber.
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