20
Fault Diagnosis LEDs
Factory Default Settings
• 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 microphone.
• Volume In LED 8 will flash red if there is a
fault with the loop (i.e. a broken aerial).
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.
