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Confidential
2-84
4.9.3 A communications error occurs
User Check
- Change the "compatibility" of the function menu to see if the error is cleared.
- Check that there is no noise source around this machine body.
Step
Cause
Solution
1
MJ PCB harness connection
failure
Reconnect the MJ PCB harness.
2
MJ PCB defective
Replace the MJ PCB ASSY.
3
Main PCB defective
Replace the main PCB ASSY.
Summary of Contents for MFC-J6920DW
Page 123: ...3 3 Confidential 2 PACKING ...
Page 146: ...3 26 Confidential 3 Set the protective part Protective part ...
Page 308: ...5 37 Confidential pfadj2 Pattern ...
Page 315: ...5 44 Confidential Margin Check Pattern ...
Page 362: ...App 3 8 Confidential When the following screen appears click Close to close the screen ...