Brother DCP-7090 Service Manual page 105

 Error code A000
Image processing was not completed correctly because the number of pixels required for
image processing is insufficient in the scanned second side data.
Step
Incorrect correction data for
1
second side CIS unit
2 Second side CIS unit failure
3 Main PCB failure
 Error code A200
The document scanning position sensor detected that the document length was 90 cm or
more during the one-side scanning.
<User Check>
• Use the paper less than A4 size.
• Remove the jammed document.
Step
Document scanning position
1 actuator caught in some sections
of the machine
Document scanning position
2
sensor failure
3 Main PCB failure
 Error code A300
The document scanning position sensor has not detected the document passing even after
the document has been fed for the specified time.
<User Check>
• Adjust the document guide to suit the document size.
• Remove the jammed document.
Step
Foreign object inside the ADF
1
Document scanning position
2 actuator caught in some sections
of the machine
Connection failure of the
3 document scanning position
sensor harness
Document scanning position
4
sensor failure
5 Main PCB failure
Cause
Cause
Cause
2-65
Remedy
Execute "Set CIS scan area
code 55)".
Replace the second side CIS unit.
Replace the main PCB ASSY.
Remedy
Reattach the document scanning position
actuator.
Replace the ADF unit.
Replace the main PCB ASSY.
Remedy
Remove the foreign objects inside the
ADF.
Reattach the document scanning position
actuator.
Reconnect the document scanning
position sensor harness.
Replace the ADF unit.
Replace the main PCB ASSY.
(Function
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