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Internal protections – Marsh Sound Design A-200 Stereo Power Amplifier User Manual

Page 12

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Marsh

12

1.

OVER-CURRENT PROTECTION

The MSD-A200S will go into protect mode and cut off the

main power supply to protect the amplifier and speakers.

This usually happens when the speaker terminals or wires

are accidentally shorted together.

2.

DC-FAULT PROTECTION

The MSD-A200S will go into protect mode when it detects

DC voltage at the speaker output. This is caused by a DC

voltage leak from the pre-amplifier outputs or by an

internal fault that gives a DC voltage leak at the speaker

output.

When in the above mentioned protect mode, the unit will shut down to prevent damage to itself or the

speakers. If this occurs, wait about 3 seconds for the unit to reset and turn itself on again.

If protect mode continues, turn the unit off and contact our service department.

3.

OVERHEAT PROTECTION

If the temperature of the output transistors exceed 76

degrees C, the MSD-A200S will shut itself down. It will

not restart automatically. Wait 5 to 10 minutes to let the

unit cool down, and then press the POWER button to turn

it back on.

Internal Protections