Troubleshooting For Fax/Phone Problems; Fax Cannot Be Sent - Brother DCP-7090 Service Manual

4.13 Troubleshooting for FAX/Phone Problems

4.13.1Fax cannot be sent

<User Check>
• Check that the line cord is inserted into the socket correctly.
• Check that the dial function setting (tone/pulse) is correct.
• Check that the fax document is set in the ADF correctly.
• Check that the number to be dialed is saved correctly in the telephone directory.
• Check that the receiver's machine works normally or the function you want to perform is
equipped with the receiver's machine.
• Move the machine to the other place to check whether there is any noise source near the
machine.
• Replace the telephone line.
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Cause
Connection failure of the
modem flat cable
Connection failure of the CIS
flat cable
Connection failure of the
panel flat cable
Connection failure of the
touch panel flat cable
Connection failure of the key
PCB flat cable
Connection failure of the ADF
document detection sensor
PCB harness
Document detection actuator
coming off
First or second side CIS flat
cable failure
First or second side CIS unit
failure
ADF drive gear failure
Document scanner unit failure
Panel PCB failure
Key PCB failure
Modem PCB failure
Main PCB failure
Reconnect the modem flat cable.
Reconnect the CIS flat cable.
Reconnect the panel flat cable.
Reconnect the touch panel flat cable.
Reconnect the key PCB flat cable.
Reconnect the ADF document detection
sensor PCB harness.
Reattach the document detection actuator.
Replace the first or second side CIS flat
cable.
Replace the first or second side CIS unit.
Replace the ADF unit.
Replace the document scanner unit.
Replace the panel PCB ASSY.
Replace the key PCB ASSY.
Replace the modem PCB ASSY.
Replace the main PCB ASSY.
2-113
Remedy
Confidential