Xerox 3300MFP Service Manual - Page 105

Fax & Phone Problems General Troubleshooting No Dial Tone While Manual Dial button is pressed, there is no dial tone. 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 3. Check the Speaker connection, and try between the LIU and the Control Board. to replace it. 4. Check if the SPEAKER is connected correctly. 4. Lastly, try to replace the Control Board. Defective MF DIAL 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. 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. Note Product supports the MF DIAL type only. Phaser 3300MFP Service Manual 4-13