14
If the input signal falls below a very low threshold continuously
for 4 hours, the MCU will power down the amp to save
electricity. If an audio signal is detected at any time, the timer
will reset. If the AUTO/OFF switch is set to the OFF position
during the countdown, the timer will reset. During the last
minute before automatic shutdown, the STATUS LED will show
a blink code. If the power button is pressed while this blink
code is displayed, the timer will reset.
DC Offset or Ground Fault
if the MCU detects either of these two conditions during
operation, it will disconnect the headphones and the STATUS
LED will change from white to red. If either condition is an
extreme failure, the MCU will also shut down the amplifier with
the associated blink code. If the either condition is deemed
abnormal, but not extreme, the MCU will attempt to recover
normal operation. If the MCU recovers, it will reconnect
headphones and change the STATUS LED red to white. If it
cannot recover after a determined period of time, it will shut
down the amplifier with the associated blink code.
