Fax & Phone Problems; No Dial Tone; Defective Mf Dial - Xerox Phaser 3300 Servce Manual

Fax & Phone Problems

No Dial Tone

Defective MF DIAL

Phaser 3300MFP Service Manual
While Manual Dial button is pressed, there is no dial tone.
Check and Cause
1. Check if the telephone line cord is
connected to TEL LINE correctly.
2. Check if the Manual Dial button makes
CLICK sound when pressed.
3. Check the connection of HARNESS
between the LIU and the Control Board.
4. Check if the SPEAKER is connected
correctly.
The MF DIAL is not functioning.
Check and Cause
1. Check if the telephone line is
connected correctly.
2. While the Manual Dial button is
pressed, listen for a CLICK sound.
3. Check the connection of HARNESS
between the LIU and the Control Board.
Note
Product supports the MF DIAL type only.
General Troubleshooting
Solution
1. If the telephone cord is normal but
there is no dial tone, then try to replace
the LIU B'd.
2. If you cannot hear the Manual Dial
CLICK sound, the Control Panel
Assembly may be defective. Try replacing
the Control Panel Assembly.
3. Check the Speaker connection, and try
to replace it.
4. Lastly, try to replace the Control Board.
Solution
1. If you cannot hear the Manual Dial
CLICK sound, the Control Panel
Assembly may be defective. Try replacing
the Control Panel Assembly.
2. If you can hear a CLICK sound, after
checking the connection of HARNESS
between the LIU and the Control Board,
replace the HARNESS.
3. If the problem persists, replace first
the LIU, then the Control Board.
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