Troubleshooting For Fax Problems; Fax Cannot Be Sent - Brother DCP-7080 Service Manual

4.13 Troubleshooting for Fax Problems

4.13.1 Fax 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 handset curled cord is inserted into the socket correctly.
- Check that the handset is placed on the handset holder 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.
Step
Connection failure of modem flat
1
cable
Connection failure of CIS flat cable Reconnect the CIS flat cable.
2
Connection failure of panel harness Reconnect the panel harness.
3
Connection failure of touch panel flat
4
cable (For models with touch panel)
Connection failure of key PCB flat
5
cable (For models with touch panel)
Connection failure of ADF cover/
6 document detection sensor PCB
harness
Connection failure of hook harness
7
(For models with handset)
Document detection actuator
8
coming off
ADF cover actuator coming off
9
Hook actuator coming off
10
(For models with handset)
Line cord breakage
11
Hook switch PCB failure
12
(For models with handset)
ADF cover/document detection
13
sensor PCB failure
ADF motor failure
14
First or second side CIS unit failure Replace the first or second side CIS unit.
15
ADF drive gear failure
16
Document scanner unit failure
17
Panel PCB failure
18
Touch panel failure
19
(For models with touch panel)
Key PCB failure
20
(For models with touch panel)
Modem PCB failure
21
Main PCB failure
22
Cause
Reconnect the modem flat cable.
Reconnect the touch panel flat cable.
Reconnect the key PCB flat cable.
Reconnect the ADF cover/document
detection sensor PCB harness.
Reconnect the hook harness.
Reattach the document detection actuator.
Reattach the ADF cover actuator.
Reattach the hook actuator.
Replace the line cord.
Replace the hook switch PCB ASSY.
Replace the ADF cover/document detection
sensor PCB ASSY.
Replace the ADF motor.
Replace the ADF unit.
Replace the document scanner unit.
Replace the panel PCB ASSY.
Replace the touch panel ASSY.
Replace the panel unit.
Replace the modem PCB ASSY.
Replace the main PCB ASSY.
2-94
Remedy
Confidential