A-9110 - Strange noises can be heard from the unit

Problems may be solved by simply turning the power on/off or disconnecting/connecting the power cord, which is easier than working on the connection, setting and operating procedure. Try the simple measures on both the unit and the connected device. After reconnecting, turn off and on the unit and the connected device. 

• This unit contains a microPC for signal processing and control functions. In very rare situations, severe interference, noise from an external source, or static electricity may cause it to lockup. In the unlikely event that this happens, unplug the power cord from the wall outlet, wait at least 5 seconds, and then plug it back in. 
• We are not responsible for reparations for damages (such as CD rental fees) due to unsuccessful recordings caused by the unit’s malfunction. Before you record important data, make sure that the material will be recorded correctly.

Resetting the unit (this resets the unit settings to the default) 

Resetting the unit to the status at the time of shipment may solve the problem. If the unit is reset, your settings are restored to the default values. Be sure to note down your setting contents before performing the following operations. 

1. While the power is on, press ON/STANDBY while pressing DIRECT.

If you have connected another unit to the same wall outlet as this unit, this noise may be an effect from the other unit.

If the symptoms improve by unplugging the power cord of the other unit, use different wall outlets for this unit and the other unit.