Front Panel; Power Switch; Led Indicators - Bryston 3BSST2 Owner's Manual

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. POWER SWITCH

The front panel label
power to the SoftStart circuitry. Note that the rear circuit breaker must be on for the amplifier to power-up.
2. L·E·D INDICATORS
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Each SST channel has a LED indicator to monitor the following conditions:
U - indicates channel has no power.
nlit
R - indicates channel is muted (power-up)
ed
G - indicates channel operation is normal.
Reen
F R - indicates channel clipping.
lashinG ed
O - indicates channel thermal shutdown.
RanGe
POWER UP SEQUENCE
After pushing the power switch ( in the picture above), each channel LED will turn from unlit to red (mute).
When the power supplies have stabilized the channel will come out of mute and the LED will change to green
(normal operation).
UNLIT L E D ( No power )
· ·
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The SST channel LED when unlit indicates no A/C mains power is present at the channel. If both channel LED
indicators are unlit the amplifier probably needs only to be powered on.
CLIPPING ( flashing red )
Clipping occurs when the channel output level no longer can follow the level increase at the input (Over driven
input condition). When an SST
then back to green when the level is reduced ( Flashing Red ). Momentary clipping can be tolerated, however
it indicates that maximum undistorted power has been surpassed and potential speaker damage may result
if overload conditions persist. Any amplifier that is constantly operated into clipping indicates a more powerful
amplifier is needed for that application.
THERMAL SHUTDOWN ( orange )
Each channel has thermal shutdown circuitry to prevent damage due to overheating. Should thermal shutdown
occur, the channel will mute, and the channel LED will turn orange indicating this condition. When the channel
has cooled to a safe operating condition the channel will return to normal operation. Persistent Thermal shut-
down indicates steps need to be taken to increase airflow across the channel or channels heat sink. ( Also see
installation section on ventilation ).
N.B. In some markets the LED indicators, which are normally red/green, may be red/blue instead. When red/blue
LEDs are supplied green is replaced with blue and orange is replaced with magenta in the above descriptions.

FRONT PANEL

is a push-on/push-off type push-button power switch used to apply or remove a/c line
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channel is driven into clipping the channel LED will change from green to red
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
