3 ] Auto Document Feeder (Adf) Malfunction (For Models With Adf) - Brother DCP375CW Service Manual

[ 3 ] Auto document feeder (ADF) malfunction (For models with ADF)

An ADF failure may occur not only due to machine malfunction but also to the user's actions.
Problems due to the user's actions
Check
Document guides
Inside the ADF
Problems due to machine malfunction
Check
ADF
Document front sensor
Document rear sensor
ADF motor
Main PCB
Possible causes
The document guides are not positioned
to match the width of document(s)
loaded.
- Foreign materials have found their
way into ADF.
- The size of the document loaded is
smaller than the specified size.
Possible causes
The spring plates of the ADF parts are
deformed.
The ADF parts are deformed or worn.
- The document front sensor is
defective.
- The document front sensor actuator is
deformed.
- The document rear sensor is defective.
- The document rear sensor actuator is
deformed.
The ADF motor does not rotate.
The motor driver IC is defective.
4-47
Problems that may result
Documents will skew.
Foreign materials can hinder
document feeding.
The document will jam inside the
ADF.
Problems that may result
A document will stop halfway
through feeding.
Two or more sheets of documents
will be fed through at once.
No document will be drawn in or
recognized by the machine.
Even placing a document in the
ADF cannot switch to "ADF
scanning."
A document will stop halfway
through feeding or will not be
recognized by the machine.
No document will be drawn in.
No document will be drawn in.
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