Krell Industries KSA-200S, KSA-300S Protection Circuitry, Simple Trouble-Shootingsteps, Operation

Models: KSA-100S KSA-300S KSA-200S

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PROTECTION CIRCUITRY

OPERATION

PROTECTION CIRCUITRY

There are no fuses in the KSA. The amplifier is protected by a series of non-

intrusive,

opto-coupled circuits

that constantly

evaluate

the

amplifier's

operation.

Appropriate

protective

action

exists

for

DC conditions,

short

circuit,

oscillation,

ACpower anomalies,

high ground resistance

and out-of-

phase ground. Collectively,

the

protection

circuitry

is

designed

to avoid

damage to

the amplifier or speakers

caused by other

defective

components,

faulty wiring,

mishandling

of

the

system

or

amplifier

failure.

When the

protection

circuit

is engaged,

the

amplifier

will

shut

off

and short

its output.

The amplifier can be turned on after resolving either the input or output problem.

SIMPLE TROUBLE-SHOOTING STEPS

Follow these steps when trying to resolve the cause of potential amplifier related failure. If the amplifier will not turn on, or stay on:

1.Disconnect all input and output connections. Once this is completed, try turning the amplifier on.

If the amplifier does not come on, check the circuit breaker on the back panel. If the circuit breaker has popped out or appears to be more extended than usual, reset the breaker switch by pressing it back in. If the amplifier still does not come back on, call KRELL.

If the amplifier does not come on and the circuit breaker on the back of the unit seems normal, check the house circuit breaker or fuse for the power outlet associated with the amplifier.

NOTE:When turning the amplifier on and off between cable checks, let the amplifier settle for at least 45 seconds before turning it back on.

2.If the amplifier turns on and appears to work properly again, turn the amplifier off and reconnect the output speaker cables for one channel only.

If the amplifier turns on normally, reconnect the other channel output speaker cables.

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Krell Industries KSA-200S, KSA-300S, KSA-100S manual Protection Circuitry, Simple Trouble-Shootingsteps, Operation