Power Entry Panel; Master Power Switch/Circuit Breaker; Ac Power Input - Bryston 9B?SST2 Owner's Manual

UNLIT LED ( NO POWER )
The 9B 2 channel LEDs, when unlit, indicate no AC mains power is present at the channel . If all channel
SST
LED indicators are unlit the 9B
indicates blown channel fuses .
N.B. When checking fuses switch off the circuit breaker on the rear panel and unplug the power cord . Use only
the specified 250V 5mm x 20mm fuses . See page 6 for the fuse locations .
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 a 9B
then back to green when the level is reduced ( Flashing Red ) . Momentary clipping can be tolerated, however
it indicates that maximum un-distorted 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 )
The 9B 2 channel has thermal shutdown circuitry to prevent damage due to overheating . Should thermal
SST
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
shutdown indicates steps need to be taken to increase airflow across the channel or channels heat sink . ( Also
see installation section on ventilation ) .
NOTE: 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.

POWER ENTRY PANEL

1.

MASTER POWER SWITCH/CIRCUIT BREAKER.

The 9B 2 uses a magnetic-trip circuit breaker (1) to protect the amplifier . This switch should be 'OFF' when installing
SST
the 9B 2 . When switched 'OFF' all AC power is removed from the amplifier, including standby power . The circuit
SST
breaker is not the day to day power switch and should be switched and left 'ON' after the installation is complete . Use
the front panel power switch (labelled "9B SST
fier . Should the breaker trip, lower or remove the amplifier input signals . Switch the breaker to the 'ON' position . Then
power the unit up normally . The circuit breaker must be 'ON' at all times for the 9B

2. AC POWER INPUT.

This is a high current plug for the power cord receptacle . Check that the voltage rating at the right of the connector
conforms with your locality . With the circuit breaker 'OFF' insert the power cord into the 9B
end to an appropriate AC power outlet .
3. DATA PLATE
Label containing the exact model name, electrical rating, serial number, model revision, date of manufacture (date
2 probably needs only to be powered on . A single LED not lighting possibly
SST
channel is driven into clipping the channel LED will change from green to red
2
SST
2
") or an external control voltage to Power-up or Power-down the ampli-
2
9B FIVE CHANNEL POWER AMPLIFIER
SST
2 to operate.
SST
SST
2 , then plug the other