Fax And Phone Problems; No Dial Tone; Defective Mf Dial - Xerox WorkCentre PE120 Service Manual

7.4 Fax and Phone Problems

7.4.1 No Dial Tone

Description: There is no dial tone when the On-Hook dial button is pressed
Possible Cause
1. The telephone line cord is incorrectly connected.
2. The speaker may not be operating correctly.
3. The harness between the LIU and main board may be
defective.

7.4.2 Defective MF Dial

Description: The MF DIAL is not working.
Possible Cause
1. Check that the telephone line cord supplied with the set
is connected to TEL LINE correctly.
2. Listen for a CLICK sound when the key is pressed.
3. Check the connection of the HARNESS between the LIU
and the main board.
4. Check that the SPEAKER is connected correctly.
a. Check the connection setup.
b. Listen for a CLICK sound when the OHD
key is pressed. If you don't hear a CLICK,
the control panel needs to be replaced.
c. Use the Tech Mode "Modem Test" to verify
the speaker and amplifier are working.
d. Check the LIU to main board wiring, replace
if defective.
e. Replace the main board.
a. If the telephone cord is OK but there is no
dial tone, try plugging a normal telephone
into the wall socket. If this is OK then
replace the LIU.
b. Listen for a CLICK sound when the OHD
key is pressed. If you don't hear a CLICK,
the control panel needs to be replaced.
c. Check the Speaker connection and the
harness between the LIU and the main
board, replace as necessary.
d. Use the Tech mode "Modem Test" to check
that the speaker and amplifier are working
e. Replace the LIU
f. Replace the main board.
Service Manual
Sequence of Repair Actions
Sequence of Repair Actions
Troubleshooting
7-15