Question about Technics SA-AX540 Receiver

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I have a technics su g91 amplifier and speakers a and b will not work and i believe that it has to do something with the "over load" icon being lit up.  I was wondering what that specific icon represented and what i can do to fix it?

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  • Anonymous Nov 18, 2007

    su-g91 - how do I connect the speakers?

  • stanstan Nov 21, 2007

    i have the same problem. as soon as i turn it on the overload light comes on without anything even hooked up to it.

  • froggy989 Mar 13, 2008

    I also have an SU-G91 unit with the mentioned overload problem. my unit has been on the shelf for some time ( was not able to get two of the chassis screws out) and I decided to try opening. I hasd hoped to fine a fuse inside but the speakers do not seem to be fused. also looking for schematics thanks

  • ECTS Apr 08, 2008

    It takes about 10 secs untill the overload light comes on. fan doesn't take in any voltage but the fan DOES work. Theres probably a problem within the output part of the crkt

  • playfrogie Jul 28, 2008

    I also have an overload problem,It was on an the overload lamp came on .I may of missed what to do,only thing I read was something to do wiyh the fan.Do I have to bring it in for repair or may be cheaper to replace.ANY HELP?????


  • Anonymous Aug 12, 2008

    I have a technics su-g91 speakers A and B will not work "overload" light comes on. Follow "troubleshooting guide". Disconnect all speakers, "overload" light come on. Is it fixable.

  • Anonymous Nov 01, 2008

    I have the same problem, and I have unhook everthing and i still have the light. pleas help me solve this problem. Michael

  • loufromutah Apr 27, 2009

    Yes I had the same problem. I took it to a really good shop in town here and they said $200. So I paid. It hurt but what kind of Amp can you buy for $200. It was one of the IC's in my case. The heat sink
    paste was melted out and brown and a little white (original color).
    I have heard of a lot of guys by-passing the delayed fan (until about half throttle) and wiring it direct. The only fault I ever found with Technics is it runs to hot.
    They need plenty of air to keep them cool.

  • robert hayes May 11, 2010

    i have the same problem but my amp's LED display also doesnt work and my over load light come on with what ever i turn on weather it be my cd player or fm stereo etc.i am curious to know can i fix it my self or how much will it cost me to have it done?

  • Anonymous Mar 31, 2014

    Ik ben op zoek naar een volumepotmeter van Technics Amp su-8080 of een vervanger.



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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.

Posted on Dec 01, 2007

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Most of the time you should check the fan.that can cause it to go into protect when volume turned up

Posted on Nov 15, 2012

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I have a technics GX 650 model. 3 years ago i put it inside my cabinet for the same reason that whenever i turned it on it stays in overload conditon. so this morning March 5, 2012 i try to dissamble the whole unit and cleaned it form dust by using paint brush and electric fan. i found the solution by just cleaning the unit fan circuitry its copper foil contacts and it works again. this unit is 19 years old already and back into its old form. so the only the circuit in the fan had a problem i thought it was the power ic.

Posted on Mar 05, 2012

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OVERLOAD means that input signal level is too high. Can you be more specific? From which source you play music when OVERLOAD icon appears?

Posted on Oct 11, 2007

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1 Answer

I have a Technics SU-G91 amp that is stuck in overload even with no input. I have tried giving it a quick blast of air to dust and still nothing. All help is appreciated!!

Your Technics unit will remain in the overload (protect mode) state until component failures have been corrected. The output stages and/or associated components may have failed.

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User manual for technics su-g91

Check the Technics website, or Panasonic, as Technics was made by Panasonic.

Dec 14, 2014 | Technics Audio Players & Recorders

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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.

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I have a Technics SU-G91 amp when I turn it on the over load light lights up and I cannot get any sound from the main speakers

Disconnect the speakers and see how that works out. It's trying to tell you it senses overcurrent or a short on the output.

May 02, 2010 | Audio Players & Recorders

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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.

Apr 08, 2009 | Technics SA-EX320 Receiver

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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.

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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