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Problem with Samick PM4150 Mixer

Any input causes the red protect light to come on and the amp cycles off. What is the cause of this

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  • Graeme Ross
    Graeme Ross May 11, 2010

    Hi MediMac

    Do you have speakers connected when this occurs?

    regards
    Graeme

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Hi Mike, the protection circuit is operating in the amp. Generally, if you can turn the amp without speakers connected and signal up, then the amp is ok (as determined by the protection feature). If it goes into protection mode, without speakers connected, then you can be sure that the amp has a problem. I know its probably not what you wanted to hear, you may need to get the rig to a repair guy for a better check out of the problem. It would also pay to check your loudspeakers and leads to be sure that a faulty speaker or short circuit has not caused the amp to fail also. Reconnecting a good amp to a faulty shorted load, will make it fail again.... and the cycle continues... at more cost!! Good Luck, and questions you got, feel free to ask away. If you think the advice I have given here is good, a "FixYa" rating would be great:)

regards
Graeme

Posted on Mar 16, 2008

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I have a simalar problem with mine, as soon as i turn it on it pops the fuse. Whats wrong and how to fix

Posted on Jun 21, 2013

Graeme, You were absolutely right. I replaced the cables and it is working fine now. There must have been a short in one of both of the cables, but since replacing them, I can operate all channels just fine.
Thanks for the insight.

Mike

Posted on Mar 16, 2008

Sorry, I did not log in when I posted the response: Yes, the speakers are both connected. I though it might be a short in either one of the speakers or in one of the cables so I disconneceted the left and it happened. Then I disconnected the right and it happened. Just so you know, it is me.
Mike

Posted on Mar 08, 2008

Yes, the speakers are both connected. I though it might be a short in either one of the speakers or in one of the cables so I disconneceted the left and it happened. Then I disconnected the right and it happened.
Any clue? Thanks.
Mike

Posted on Mar 08, 2008

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