6
Amplifier and Speaker Protection
The power LED will flash if the following has occurred.
1)
Thermal cutout has been activated.
If the amplifier reaches a temperature liable to cause internal
electronic damage a thermal protection sensor will activate, and
protect the speaker, and alert the user of the fault condition. The unit
should be turned off for at least 30 minutes to allow for complete
cooling. After this period the amplifier should automatically reset and
continue to work normally. If it does not, turn off for more than an hour
before retrying.
If the amplifier is still used, in an over heated condition, because of
sustained high sound levels, the amplifier protection circuit will reset
and set every few minutes, until the volume level is reduced and the
amplifier is allowed to cool down, this could occur when driving high
levels into 4
Ω
speakers.
2)
DC voltage level present on speaker terminals.
If in the event of a major fault occurring in the amplifier, and thus
causing a DC voltage level to be present on the speaker terminals, the
protection circuit will activate, and protect the speaker, and alert the
user of the fault condition.
3)
One of the mains fuses has blown.
If in the event of one of the mains fuses blowing, the protection circuit
will activate, and protect the speaker, and alert the user of the fault
condition.
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