Brother MFC-9340CDW - A Communication Error Occurs

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Confidential
4.13.4 A communication error occurs
<User Check>
- Check whether the source of noise is around the machine.
Step Cause Remedy
1 Modem PCB harness
connection failure
Check the modem PCB harness connection
and reconnect it.
2 Modem PCB failure Replace the modem PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.