Phaser 3300MFP Service Manual 4-13
General Troubleshooting
Fax & Phone Problems
No Dial Tone
While Manual Dial button is pressed, there is no dial tone.
Defective MF DIAL
The MF DIAL is not functioning.
Product supports the MF DIAL type only.
Check and Cause Solution
1. Check if the telephone line cord is
connected to TEL LINE correctly.
1. If the telephone cord is normal but
there is no dial tone, then try to replace
the LIU B'd.
2. Check if the Manual Dial button makes
CLICK sound when pressed.
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 connection of HARNESS
between the LIU and the Control Board.
3. Check the Speaker connection, and try
to replace it.
4. Check if the SPEAKER is connected
correctly.
4. Lastly, try to replace the Control Board.
Check and Cause Solution
1. Check if the telephone line is
connected correctly.
2. While the Manual Dial button is
pressed, listen for a CLICK sound.
1. 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 connection of HARNESS
between the LIU and the Control Board.
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.