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OPERATION
POWERING UP
With all your connections made, you are ready to listen to your
Boulder 860 Stereo Power Amplifier.
To turn the amplifier on, press the STANDBY button on the front
panel. The amplifier will perform a warm up cycle and the indicator
will alternate between red and amber for 45 seconds. This power up
sequence can be skipped by pressing and holding the STANDBY button
until the indicator turns red; then release and it will start in about five
seconds.
To reduce the inrush of electrical current during power-up, relays
are used to turn on the amplifier in stages. These are under the control
of the supervising microprocessor. During the power up sequence, you
will hear a relay click followed by an additional relay click after two
seconds.
The indicator will then turn and remain amber during normal
operation.
To turn the amplifier off, press the STANDBY button again. The
indicator will continuously change from red to green.
OPERATION