Dell 1815DN service manual Fax & Phone Problems, No Dial Tone, Defective MF Dial

Troubleshooting

7.4 Fax & Phone Problems

7.4.1 No Dial Tone

•Description While on-hook button is pressed, there is no dial tone.

	Check and Cause		Solution
1.	Check if the telephone line cord is connected to	1.	If the telephone cord is normal but there is no dial tone,
	TEL LINE correctly.		then try to replace the LIU B'd.
2. Check if it makes CLICK sound while OHD key is		2. If you cannot hear the OHD CLICK sound, the OPE
	pressed.		Ass’y may be defective. Try to replace the OPE Ass’y.
3.	Check the connection of HARNESS between the	3.	Check the Speaker connection, and try to replace it.
	LIU and the Main B'd.
4. Check if the SPEAKER is connected correctly.		4.	Lastly, try to replace the Main B'd.

7.4.2 Defective MF DIAL

•Description The MF DIAL is not functioning.

	Check and Cause		Solution
1. Check if the telephone line is connected correctly .		1.	If you cannot catch the OHD CLICK sound, the OPE
			Ass’y may be defective. Try to replace the OPE Ass’y.
2.	Wile the BUTTON KEY is pressed, check to catch	2.	If you can catch a CLICK sound, after checking the
	a CLICK sound.		connection of HARNESS between the LIU and the
			Main PBA, try to replace the HARNESS.
3.	Check the connection of HARNESS between the	3. The problem still persists, then replace the LIU and the
	LIU and the Main PBA.		main B'd in sequence.

Notes:

Product supports the MF DIAL type only.

Service Manual 7-17