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Old 26th June 2004, 07:25 PM   #1
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Unhappy Samick SMP-4000


I have a Samick SMP-4000 which someone lent me to have a look at, they'd given it on extended loan to a band they used to play in and it came back trashed.

When I first powered it up I got signal through the left channel only, heavily distorted, and after about 3 seconds it stopped and the red "Protect" led came on. Whenever I turn the amp on now the led just stays on and there's no response from the amp.

I've looked round the internet and can't find a manual for this amp, there doesn't seem to be anything on the Samick site about it. Does anyone have a manual, know what's up with it, or even know what the Protect led means on this amp?

Cheers, Tom.
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Old 26th June 2004, 08:03 PM   #2
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Sorry but I do not have the manual for this amp, however as to my earlier knowledge with Samick amps, you got a problem in the output stage (which I recall seems to be a common problem), resulting in DC on the output.

Try disconnect the output devices and power it up again and do a few meassurements around the driver stage..............
Free Schematic and Service Manual downloads, Spare time company (just for fun):
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Old 4th April 2009, 12:39 AM   #3
PMik is offline PMik  United States
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sure you have the schematics
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