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Fault Diagnosis LEDs

Factory Default Settings

To return the amplifier the factory default settings:

1. 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.

•

Volume In LED 8 will stay red if there is a

fault with the staff microphone.

•

Volume Out LED 8 will stay red if there is a

fault with the customer/visitor microphone.

•

Volume In LED 8 will flash red if there is a

fault with the loop (e.g. a broken aerial).