Brother DCP-7090 Service Manual page 107

 Error code A700
Color parameter in the ROM does not match the first side or second side CIS.
Error code A900
A scanning error occurred while processing the scanned image.
Step
Incorrect correction data for first
1
side or second side CIS unit
2 Damaged first side CIS flat cable
Damaged second side CIS flat
3
cable
4 First side CIS unit failure
5 Second side CIS unit failure
6 Main PCB failure
 Error code AC00
When scanning the fax, white or black correction data for the second side CIS was not within
the correct range (first time).
Step
Incorrect correction data for
1
second side CIS unit
Dirt on the white tape on the
2
second side document hold
Damaged second side CIS flat
3
cable
4 Second side CIS unit failure
5 White tape failure
6 Main PCB failure
 Error code AD00
Image processing cannot be completed correctly because the number of pixels required for
image processing is insufficient in the scanned first side data.
Step
Incorrect correction data for first
1
side CIS unit
Connection failure of the first
2
side CIS flat cable
3 First side CIS unit failure
4 White tape failure
5 Main PCB failure
Cause
Cause
Cause
2-67
Remedy
Execute "Set CIS scan area
code 55)".
Replace the first side CIS flat cable.
Replace the second side CIS flat cable.
Replace the first side CIS unit.
Replace the second side CIS unit.
Replace the main PCB ASSY.
Remedy
Execute "Acquire white level data
(Function code 55)".
Clean the white tape on the second side
document hold.
Replace the second side CIS flat cable.
Replace the second side CIS unit.
Replace the ADF unit.
Replace the main PCB ASSY.
Remedy
Execute "Set CIS scan area
code 55)".
Reconnect the first side CIS flat cable.
Replace the first side CIS unit.
Replace the document scanner unit.
Replace the main PCB ASSY.
(Function
(Function
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