Why is Sharp Fax Machine speaker howling?
- UuturnerAug 31, 2025
If a loud howling sound occurs when using the speaker on your Sharp Fax Machine, it may be due to feedback. To avoid this, turn off the speaker before replacing the handset.

Why is Sharp Fax Machine speaker howling?
If a loud howling sound occurs when using the speaker on your Sharp Fax Machine, it may be due to feedback. To avoid this, turn off the speaker before replacing the handset.
How to fix poor general print quality on Sharp FO-A660?
To improve general print quality, select a paper appropriate for the thermal transfer printer in your fax. It is recommended to use laser quality paper with a smooth finish. Copier paper can work, but it may produce a lighter print quality.
Why is the copy quality poor on Sharp FO-A660 Fax Machine?
If the copy quality is poor and/or dark vertical lines appear on your Sharp Fax Machine, dirt or material on the scanning glass may be the cause. Clean the scanning glass.
What to do if nothing appears in the display of my Sharp FO-A660 Fax Machine?
If nothing appears in the display, make sure the power cord is properly plugged into a power outlet. Also, connect another electrical appliance to the outlet to see if it has power.
What to do if my Sharp FO-A660 received images are distorted?
If received images are distorted, have the other party try sending the document again, as noise on the telephone line may cause distortion. Also, the print head may be dirty. If the copy or report is also distorted, your fax machine may need service.
What to do if my Sharp Fax Machine power is on, but no reception takes place?
If the power is on, but no reception occurs, make sure that the telephone line cord is plugged into the TEL. LINE socket, and not the TEL. SET socket.
Why does my Sharp FO-A660 say 'OVER HEAT'?
The 'OVER HEAT' message indicates that the print head has overheated. Operation can be continued after it cools. If overheating frequently occurs, try changing the print contrast setting to LIGHT.
What to do if my Sharp Fax Machine won't transmit?
If your Sharp Fax Machine is powered on but not transmitting, ensure the receiving machine has paper and the telephone line cord is plugged into the TEL. LINE socket, not the TEL. SET socket. If the receiving machine is in manual mode without an attendant, reception won't be possible. Check the display for error messages and listen for a dial tone.
Why is dialing not possible on Sharp FO-A660 Fax Machine?
If dialing is not possible on your Sharp Fax Machine, ensure the power cord is properly plugged into a power outlet and that the telephone line is correctly connected to both the TEL. LINE socket and the wall socket. Also, verify that the fax machine is set to the correct dialing mode for your telephone line.
Why are received images distorted on Sharp FO-A660?
If received images are distorted on your Sharp Fax Machine, the issue might be due to noise on the telephone line. Ask the sender to resend the document. Also, the print head could be dirty. Make a copy or print a report; if the copy or report is distorted too, your fax machine may need service.
| Type | Plain Paper Fax |
|---|---|
| Print Technology | Thermal Transfer |
| Display | LCD |
| Memory | 512 KB |
| Paper Size | A4, Letter |
Details for connecting handset, power cord, and telephone line.
Instructions for installing the film roll for printing output.
Guide on how to properly load paper into the tray for printing.
Steps to input personal identification for outgoing faxes.
How to select the mode for receiving faxes and calls.
Guide to record the greeting message for callers.
Steps to enable the answering machine function for receiving calls.
Step-by-step guide for sending faxes manually.
Instructions for storing and using auto-dial numbers.
Transmitting documents stored in the machine's memory.
General guide to resolving common issues.
Solutions for issues related to making calls and sending faxes.
Fixes for issues with receiving faxes and making copies.
Explains display messages and audible alerts.
Steps to remove jammed paper or documents.