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Technics receiver SD-S936 has no sound at all. This happened once about a year ago and now it is completly out. I see the fan in the rear is not turning. Is there an internal fuse? This system was new 1995. Thanks

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4 Suggested Answers

  • 336 Answers

SOURCE: receiver says power overload, turn system off

It probably needs soldering of the voltage regulators and/or output IC.
I think that model has an access panel on the bottom (it may need to be cut out then rotated and screwed back on when done).
If it doesn't have the panel the main circuit board needs to be taken out to access them.
The regulators and output IC are mounted on the main heat sink. a little soldering and it should be good as new.

Posted on Feb 17, 2009

  • 583 Answers

SOURCE: Problem with subwoofer and one off the speakers.

just check if the wires are cut off somewhere or the internal connections loseened up.check this out.

Posted on Mar 13, 2009

  • 4 Answers

SOURCE: Technics Receiver SA-DX940 subwoofer

I think this unit requires a powered sub-woofer.

Posted on Feb 10, 2010

dunnbiker
  • 8546 Answers

SOURCE: Hi there, I have a

Of course it can be repaired, but not by us and maybe not economically. Take it to a tech.

Try disconnecting the speakers and a new fuse. Maybe it's just a speaker shorted. Low probability.

Posted on Jan 09, 2011

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1 Answer

What causes the sound to cut for a few seconds?


Hi i just would to know if you did try to connect your TV by HDMI to test if your optical output of your reciever/amplifier have some problem. In second time yes maybe you can have an overheating problem, just take a look at your grid and maybe a clean-up will be necessary. I don't think your amplifier have a fan.
Don't hesitate to contact me here in this post. have a nice day.

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Ahh technics. Technics always had overheating problems, trust me. Every since they started, their amps would get so hot they would hurt to touch. The reason the fan is not coming on seams to be something inside the circuit board. I'm sure that technics could fix this. If the fan works out of the receiver, then it must not be the fan. ;P

I would maybe get a computer fan, and just put it on top of the receiver and turn it on, or send it in for fixing. Also, do you have to crank the volume to get the speakers to play at your volume, and does the impeadence match the receiver. Because you may be pushing the receiver too hard.

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1 Answer

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I'm not sure what entry will be emailed to you, so I have repeated the "solution" from the other entry below. Please only update one.

Thanks,
Dan

Initial entry:

There could be a number of reasons for this. It woyld help if you could indicate what resistors you changed. The circuit designation should be marked on the PC board. Please post those here and I'll look further and provide some possible solutions.

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1 Answer

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Please update the initial posting and continue the diagnosis there. The initial response is repeated below.

Thanks,
Dan

Initial response:

There could be a number of reasons for this. It woyld help if you could indicate what resistors you changed. The circuit designation should be marked on the PC board. Please post those here and I'll look further and provide some possible solutions.

Thanks,
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1 Answer

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There could be a number of reasons for this. It woyld help if you could indicate what resistors you changed. The circuit designation should be marked on the PC board. Please post those here and I'll look further and provide some possible solutions.

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2 Answers

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1 Answer

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i hade the same problem with the same unit and fixed it my self.
turns out the chip that is screwed to the heat sink was blown, and the resister that controles the fan burnt as well.all i did is ,get a datasheet of the unit and toke if apart went to the parts store and bought what was needed. the chip that is screwed to the heat sink has a part number on it whitch if you cant find the same can be switched with equivilant chip (find a datasheet of chip).
then my fan would not run ,i notesed that the risister was shot , the resister is color code witch means the resisters values. its a prety big job since the reciever has to be almost completely taken apart but very worth while .its ben workin like new for about 4 years since the repair with no problems or isues. hope this helps ad good luke.

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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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Most of these problems are rooted in a failed power amp module.
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1 Answer

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