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Technics stereo integrated amplifier su-g91

I have one and all it does is have this saying overload!!! what can i do to fix this problem for once and for all??? please help me.................thanks alot... hope to hear from you all real soon........

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  • tjnodes Sep 09, 2008

    Technics SA-GX290 Displaing OVERLOAD SHUTDOWN. I have tested both Power Modules, Power transistors, Resistors and completely traced and tested all component's along the OVER LOAD Protection trac form connector CN903. Everything test good and their are no hot spots on the board or components. This connector connect's to the front control panel behind the Disply. Thier does'nt appear to be any seconday power past the fist stage relay. Any help would be greatly appreciated. Tom

  • firebird9976 Oct 21, 2008

    I have the Technics av control receiver sa-dx750. It is old but just recently ran into the problem of it shutting down. I can get about 2 hours out of it then it shuts down and shows an error message F70. Having to do with the power supply. How do I fix it??

  • touch4in1
    touch4in1 Oct 15, 2012

    there is a short in the conection in the front panel re flow all points you will not see the break it will be hair line hidden and it expands when it gets warm causing the unit to short i have repaired 4 total so far this year alone all same issue some times i could not even find it testing it either due to the unit was cool and not being pushed hard enough to make it short

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I had the same problem with the over load kicking in and shuting down the sound i the opened the unit to see. all the fuses where good and where.when i put it back together i then noticed that when i turned up the volume the rear fan did not work after palying with it some how started working and sound was as good as new and did not cut off. its been working fine since then

Posted on Jul 16, 2008

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It sound like you have burt the output stage, for some reason, u have over driven the speakers witch blew the output ic's, or have shorted output. To check if you have shorted output unplug the speaker's and try again to see if the mesage goes away, if it doesn't open the top cover to see if you can see if there is burt resistor's or fuses, if so replace them, then try again without speakers connected, never put the volume to max, why ?????? I just don't get it. Leave the volume to 1 or 10% capacity to try thing's or with earphones this is alway's to me the best way, if for some reason it keep's burning fuses, then it is ether the power supply depending witch fuse blow's or the output amp stage, most likely if is the output amp, the two big ic's you see, check on googles with the part # on them this will tell you what they or.

Hope this helps

Bob the builder.

Posted on Feb 08, 2008

  • robert landry Feb 08, 2008

    Hi, Also check for cold solder joint on the ouput, I also seen this problem on panasonic, it seem to be a common problem with them.

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Hello ive got a diffrent problem ive got a technics hifi and when u put it onto aux it says txe-rvc and cd is dc its all the wrong way around what can i do thanks

Posted on Aug 29, 2009

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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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Sorry i don't have better news,
Rob

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Keep me posted.
Dan

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