No.
Definition
Symptom Possible Cause
The ADF continues to send the FGATE
signal for more than 60 seconds after the
ADF starts scanning.
• Defective ADF connector
• Defective SBU board
901 B
Mechanical total counter error
The polling module does not detect the
mechanical total counter.
• Defective mechanical total counter
• Defective BICU
• Loose connection
903 B
Engine total counter error
The checksum of the total counter is not
correct.
• Defective NVRAM on the BICU
954 B
Printer application program error
The printer application program does not
become ready when the printer
application program is necessary.
• Defective application program
955 B
Image transfer error
The BICU requests the controller to
transfer image data; but the controller
does not become ready.
• Defective application program
964 B
Status error (laser optics housing unit)
The optics-housing unit does not become
ready within 17 seconds after a request.
• Defective software
980 B
Controller-engine inconsistency
The controller is incompatible with the
engine.
One of the following controllers is installed
to the basic model:
• The controller of the MFP model
• The controller of the copier/facsimile
model
• The controller of the printer/scanner/
copier model
4. Troubleshooting
114
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