Question about Technics SA-DX940

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Overload appears The "overload" appears soon after turning on. Try turning off and back on. no help. Girl friend said she was reaching around the unit when it started doing it. im thinking that she got a couple of speaker wire together. is there a way to reset with out using the reset button on the front. Cause that does not work either.............thanks in advance...........AD

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Try un hooking all the speakers an see if it still does it thats a circuit protection, if it stops hook them back up an should work, if it dont then there may of been a fuse blown to prevent critical damage

Posted on Oct 31, 2008

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1 Answer

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H appears normal and L appears to be defect.
also see page 88 to troubleshoot further Pioneer SX 316 Service Manual

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Power the unit off , Disconnect all the speakers ,power the unit back on and check to see if you get the same message, if so one or all of your speakers could be bad. This message appears when there is too much load on the output IC's,generally causes shutdown. Also try blowing the system out with canned air, And removing anything that prevents the unit from getting enough ventilation.

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Screen displays "overload, switch off power." Have


Hi Laurel,

Overload in other unit protect error code. This will appear once the processor sense a malfunction either on the power supply or on the load (high chance is the output IC). DIY steps are as follow to determine where the fault is : 1. Allow the unit to cool down for an hour. Give proper ventilation and keep away all obstruction from the vent to have a sufficient air flow. 2. Disconnect one at a time the speakers, inputs, from the unit while powering it on.

If the unit back to normal again then you've confirmed that any of the above caused the error code. If #1 is the caused, you have to check also the exhaust fan(if installed), clean it as much as possible, replaced if faulty. If #2 is the caused (speaker) check the wire and speakers for short, (input) check the RCA cord for short or replaced if necessary.

If the above simple fix didn't cure the error code, you can try the next steps if you are an electronicsenthusiast. Now after removing the cover, you have to concentrate first on the power supply board. Look for bulged electrolytic capacitor. Leaky capacitor will affect the regulation of the supply and will trigger the error code. Look for dry joints. Check it also in the pre-amplifier stage, main output board where a big heat sink is located. Next disable the output amplifier stage by disconnecting the supply. If the unit come out, make some re-soldering on the board, spot the cold solder and dry joints and then try to connect again. If the error code appear again, high chance that your output IC is faulty but still to be confirmed. Using the disoldering pump and soldering iron pull-out the output IC from the board then try the unit. If the error code disappear, confirmed that your IC is faulty.After trying the abovesteps-by-steps guide and still the symptoms persist this is the time for you to send it to repair shop. Remember that your unit has a lot of parts and only some basic steps have done, leave the expert to troubleshoot the entire unit.

Hope I helped you.

Have a nice day!

Thanks for using Fixya.

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1 Answer

My denon receiver keeps shutting off around -15 and it just started doing it. I reset it to factory settings and all the speakers are working fine. It isn't hot, it will do it as soon as I turn it on. I am...


try this and see if it work. keep in mind that the audio output is very sensitive unit and it has a built in reset switch which keeping the unit from shorting out. the systems go into reset because of safety precaution overloading the systems. The most important is to make sure you have the correct post connect from the receiver to the speakers, such as Positive to Positive and Negative to Negative. If the post is not hooked into the correct post it will sense the overload and the unit go into reset mode or protection mode. Trace the correct wire to the right post and see if that will rectify the issue.

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1 Answer

Denon avr-1706 receiver just shuts off


This sounds like the amps protector circuit has been activated due to thermal overload. switch it off for an hour or more to let it cool down, make sure your spkrs are connected properly, don't parallel. Try using a fan on the unit to get that heat away. Get a techie friend to give the insides a once over, and clear away any dust that has built up.

hope this is of some help,
Cheers Kimbo.

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1 Answer

Friend turned volume up.. now display/volume died no sound


Sounds like your friend burned out the power amplifier. That would be the only reason none of the channels work. Unless the unit was muted by accident and no one checked the mute function - though I doubt that.

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2 Answers

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Cracked solder joints due to excessive heat cycling. Do not place in a shelf system. Top MUST be open for 1 ft. or better for proper convective cooling effect. Mine suffered same fate but repaired locally.

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1 Answer

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try turning the unit off in standby mode then hold down the enter button and then the power button for about 10m seconds that should reset the unit depending on how new the unit is it sometimes has a digital saftey setting but i doubt that would cause it to do what you are saying

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4 Answers

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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.

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1 Answer

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From the manual, you may have seen this: Switch off the unit, determine and correct the cause, then switch the unit on. Causes include: ?Shorting (bare wires touching) of positive and negative speaker wires. ?Using speakers with an impedance lower than that rated for this unit. ?Straining of the speakers through excessive volume or power. ?Using the unit in a hot environment without proper ventilation.

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