Brother MFC-9130CW Service Manual page 158

■ All black
Step
1 White level calibration data
failure
2 Firmware inconsistency
3 First side or second side CIS
unit failure
4 Main PCB failure
Cause
Perform the acquisition of white level data.
(Function code
Refer to
firmware, Panel firmware, Main Firmware)" in
Chapter 4
firmware.
Replace the first side or second side CIS
unit.
Replace the main PCB ASSY.
2-119
Remedy
55)
"1.1 Installing the Firmware (Sub
and install the latest main
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