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My technics keep telling me overload. how can i fix it?

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There are only 2 things you can do as the end user.

1. is to disconnect the speakers and see if it turns on without the overload error. If it does, you may just have a bad speaker or speaker wires that are shorted together.

2. Unplug the unit from the wall and wait about 2 or 3 hours before plugging it back in. This will reset the microprocessor and if the micro has any minor software glitches, it will clear them.

The most likely problem is that one of the output amp IC's is shorted and it is going into protect mode.

Another possibility is that the solder connections on the amp board are bad. These Technics receivers are very well known for that.

If the first 2 suggestions do not help, you should take it in to a repair center to have it looked at by a professional unless you are have some very good soldering skills, and have a multimeter to check some voltages.

I hope this helps,

Posted on Jun 22, 2008

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dunnbiker
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SOURCE: My Technics SA-AX540 AV Control

Heat?


Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.


Check for loose speaker connections as a root cause for intermittent shutdown.

Posted on Feb 21, 2011

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