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I have an SU G91 Stereo Amplifier and it keeps overloading and shuts off the sound?

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Have you tried disconnecting all the speakers and inputs and turn it on?
If it still shuts off you have an internal problem, if it stays on, connect one item at a time until it shuts off and that is the problem.

Posted on Jan 18, 2013

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Check if your speaker match your amp, and dont pump it until it hurt, easy on the volume, maybe your amp has an auto-protect circuit that automatically shuts it off when it senses overloading

Posted on May 06, 2010

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1 Answer

How do I hook up a stereo reciver to the technics su-g91


I assume you want to use the SU-G91 as a power amplifier to drive your speakers. If your receiver has connections for inserting an equalizer (may be labeled pre-amp output and power amp input), remove the jumpers between the pre-amp and the power amp, then run cables from the pre-amp to the SU-G91 inputs. You can have an equalizer between the receiver and the integrated amplifier.
If this is not available, use the recording output (for a tape recorder on older receivers). Note that the volume control on the receiver will be bypassed with this connection.

Sep 23, 2012 | Audio Players & Recorders

1 Answer

Over load lite


The SU-G91 uses output IC's ( big black square things mounted on the silver heatsink inside the amplifier ). Once the overload light comes on, the output IC(s) are fried. It will have to go to a repair shop and the output IC's are expensive $80-$100 each !!

Sorry i don't have better news,
Rob

Mar 25, 2012 | Audio Players & Recorders

1 Answer

I have a Technics stereo integrated amplifier SU G75. The cooling fan began making chirping noises then stopped. Now every time I turn the stereo on I get a overload message. Could it be the cooling fan...


It chirped because the bearings were worn out, then it froze up and isn't moving any air. Get it replaced. DO NOT run the unit if it keeps overloading or you will have a bigger problem.

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I have no sound in teh left channel , could be an integrated ?


Hey, The model of the amplifier is SU-G91 Technics.....If you could help......Thank you.

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THe amp has detected a problem and shutdown to prevent further damage. This unit has 2 amp pacs inside and one or both have failed. If you can solder, you can fix this yourself. The main amp pac is an SVI3206 and can be purchased online for about $60.

Keep me posted.
Dan

Oct 17, 2008 | Audio Players & Recorders

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Have you checked the fuse in the unit?

Aug 31, 2008 | Technics SA-AX540 Receiver

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Technics SU-G91 OVERLOAD PROBLEM


I had the same problem. As soon as the volume reached about 24db it would go into overload. I was able to fix it by soldering all the connections on the larger power module. The one connected the the heat sink. When I took it apart there where several solder points that had come loose.

Oct 10, 2007 | Technics SA-AX540 Receiver

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