Troubleshooting Of Fax Functions; Fax Can't Send It - Brother DCP-L8400CDN Service Manual

4.13 Troubleshooting of FAX Functions

4.13.1 FAX can't send it

< User Check >
- Check whether the line cord is correctly inserted into the socket.
- Check whether the dialing function setting (tone/pulse) is correct.
- Check whether the FAX document is correctly loaded on the ADF.
Step
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Cause
Connection failure of the
modem PCB flat cable
Connection failure of the
panel PCB harness
Connection failure of the
touch panel flat cable
Connection failure of the ADF
cover/document detection
sensor PCB harness
Coming off of document
detection actuator
Coming off of ADF cover
actuator
Disconnection of line cord
ADF cover/document
detection sensor failure
ADF motor failure
First side or second side CIS
unit failure
ADF drive gear damaged
Failure of paper feed section
of document scanner unit
Panel PCB failure
Touch panel failure
Key PCB failure
Modem PCB failure
Main PCB failure
Reconnect the modem PCB flat cable.
Reconnect the panel PCB harness.
Reconnect the touch panel flat cable.
Reconnect the ADF cover/document
detection sensor PCB harness.
Re-assemble the document detection
actuator.
Re-assemble the ADF cover actuator.
Replace the line cord.
Replace the ADF cover/document detection
sensor PCB ASSY.
Replace the ADF motor.
Replace the First side or second side CIS
unit.
Replace the ADF unit.
Replace the document scanner unit.
Replace the panel PCB unit.
Replace the touch panel ASSY.
Replace the panel cover ASSY.
Replace the modem PCB ASSY.
Replace the main PCB ASSY.
2-131
Remedy
Confidential