Brother DCP-7090 Service Manual page 61

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<User Check>
• Check that the document is not reversed.
Step
Incorrect white level
1
correction data
First or second side CIS flat
2
cable failure
First or second side CIS unit
3
failure
4 Main PCB failure
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<User Check>
• Install all the latest firmwares.
Step
Incorrect white level
1
correction data
First or second side CIS flat
2
cable failure
First or second side CIS unit
3
failure
4 Main PCB failure
Cause
Execute "Acquire white level data (Function
code 55)".
Replace the first or second side CIS flat
cable.
Replace the first or second side CIS unit.
Replace the main PCB ASSY.
Cause
Execute "Acquire white level data (Function
code 55)".
Replace the first or second side CIS flat
cable.
Replace the first or second side CIS unit.
Replace the main PCB ASSY.
Remedy
Remedy