Contacta STS-A31H Setup Manual - Page 5

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Symptom

There is no power

detected through

amplifier (and there is

power at the socket).

Amplifier goes into

feedback.

Unit does not go into

power saving mode.

Factory Default Settings

To return to the factory default settings:

Unplug the power supply and then reconnect it.

2. Press the On/Off button and Volume In (-) button together, then release.

3. The Volume In LED bar will have all LEDs illuminated, while the Volume

Out LED bar will display the firmware revision number in a fixed pattern

of LEDs. This indicates that default settings have been restored.

If the amplifier detects an error in its' settings memory it will restore itself to

factory default settings.

Our Window Intercom System amplifiers are pre-set to provide the

recommended output for most environments. Should you need to adjust

the Volume, Ducking or Hearing Loop levels outside of the pre-set amplifier

parameters, you can do this by entering Engineers Mode (see pages 6 & 7).

Troubleshooting

Possible Fault

1) Power jack not plugged in or

faulty.

2) Plug fuse has blown.

3) Faulty power supply unit.

4) Faulty amplifier.

1) Internal volume gain set to high.

2) Microphone positioned too close

to speaker.

1) Ambient noise in area is too high.

Action

1) Check power jack is firmly plugged in.

2) Replace fuse, but if it blows again

contact your supplier.

3) Replace the power supply unit.

4) Replace amplifier.

1) Access the amplifier engineers mode to

adjust the internal settings.

2) Move the microphone to a location

further from the speaker.

1) Switch off any air con systems, desktop

fans and or computers to reduce ambient

noise.