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I HAVE A TECHNICS RECEIVER SA-GX470. WHEN I TURN IT ON IT PLAYS OK. AFTER 15,30 OR 60 MINUTES OVERLOAD APPEARS ON THE DISPLAY. THE SPEAKER WIRES AR NOT SHORTED. PLEASE ADVICE

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Hi,

Welcome to Fixya. If you have an Overload Error you need to check the cause of the problem.


1. It can be Too much power. i.e., turning up the volume too far?
2. Speaker impedance too low? (Check the specs on the speakers.) Or maybe a short on one of the speaker wires?
3. Faulty overload protection circuit.
4. Faulty output transistors in one or more channels

Run at a lower level to see if it is just too much drive power into the speakers (loudness). If still have a problem better check the system with a shop or a local tech to look at it.

If you have questions please let me know. Thanks for usin Fixya.

Posted on Mar 15, 2011

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Disconnect the speaker wires at the receiver, turn up the volume, if it goes into protection, it's an internal problem and needs service. If it does not go into protection, re connect one speaker at a time and test. If it shuts down check the speaker itself, if they are as old as the receiver, chances are good that the surrounds on the speakers themselves have disintegrated. Older speakers used foam surrounds, newer ones use rubber or plastic composite material that will not disintegrate. What will happen is dust and moisture will get into the voice coil and cause a short, even though the speaker still plays. Hope this helps. If you need more help or just advice, post a comment, and I'll help if I can

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Disconnect all speaker wires from the back of the receiver and turn it back on. If overload does not turn on, post a comment and I can walk you thru troubleshooting. If it does, your receiver needs to be serviced. Hope this helps

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I have a technics too, and faced the same problem. The solution is very simple just ensure the +ve and -ve wires are connected correctly for each speaker to the amp. Eg. red wire to the red knob and black wire to the black on both ends. sometimes this arises because the wires are of just one color however there will be some marking on the wire to indicate which is +ve and -ve. This took care of the overload problem.

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Please let me know the results of the test above.

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From the manual pg 27....... "The protection circuitry has functioned because the positive and negative speaker connection wires are "shorted," speaker systems with an impedance less than the indicated rated impedance of this unit are used or under severe use, such as loud volume, excessive power and in an excessively hot environment."

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over load means your speakers and its cable----please check it for bad cable or bad speaker------try to insert speaker one by one and test each time to investigate the bad one.--------if every thing is ok and you keep good ventilation around your receiver (no blocking of ventilation holes)and you still have a problem your protection circuit in your receiver needs to be checked by service technician

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