Question about Technics Audio & Video Receivers

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SAAX7 Technics stereo receiver stops broadcasting after 20-30 min

My thought is that the fan is not working and the unit overheats. Should the fan immediately go on when the receiver is turned on? In my case the fan does not. Ron

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Ron- The fan does not turn on when the receiver is first powered on, it will run when the amplifiers begin to run HOT, they are kinda controlled by a thermo switch, if the fan does not turn on usually the receiver will shut down and display a OVERLOAD message in the display panel. My advise is to keep the unit well ventailated with plenty of breathing space around the top vent closure, this will allow air flow when loud volume output is used. Also use the rated ohm speakers with the SA-AX7,

Posted on Jan 26, 2009

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1 Answer

Fan quit working. Is it likely the board, or the fan? Currently have a Radio Shack fan mounted; it's 120v, plugged into the AUX power on the back of the unit. It's noisy, otherwise unit works and runs...


Hi, Have got and still use a Technics SA-GX910 Dolby Amp. It had an overheating problem too due to Air temp and power drain etc and the internal fan only engaged at certain volume level. Overheating was overcome by adding another internal fan.
Your unit however might need a bit more of a fix-me-up or throw it away

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My Technics stereo system ...the display screen shows nothing


The question is, do you hear any sound? Is just the display off or is the entire unit shutdown? Can you tell?

These displays are known to develope poor solder connections at the power input and ground pins. If you can solder, open up the unit (unplugged of course) and examine the pins for the display. This will be on the PC board attached to the front panel. The pins at either end of a long line of pins will be the power and ground pins. Reasolder those pins, taking care not to short the pins together and try the unit once done. If that does not resolve the problem (assuming it is just a display problem), update this with as many details as you can about the behavior of the unit and we'll look further.

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Sound just stopped all of a sudden .....unplugged it for 30 secs still did not work....fan was on but it felt a little hot on top


Power amp output IC have an overheat. Cool it down and restart at
low volume. Send your e-mail if this did solve your problem.

Sep 25, 2009 | Technics SA-DA8 Receiver

1 Answer

Volume control blew out


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.

Mar 14, 2009 | Technics Audio & Video Receivers

2 Answers

Hi there .......my sa gx303P stereo amplifier/tuner technics ...the cooling fan for the power amplifier works only on a somewhat strong signal .....if you play soft music at low volume the cooling fan...


These units are designed to only run the fan when necessary. If the unit is overheating, there is a problem in the detection circuit. This is a relatively inexpensive repair. If you are getting overheating when running at a low volume, it suggests that the speakers are not matched to the amp. In other words, the amp is expecting an 8 ohm load and is being presented a lower ohm load. This makes the amp work harder and generates more heat. Check the speaker wires and make sure that they are not frayed or crossing in any manner. Also, verify that the rating of the speakers is correct.

Update this with what you find.

Thanks,
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Dec 02, 2008 | Technics Audio & Video Receivers

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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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Most of these problems are rooted in a failed power amp module.
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Ratnesh, I have this same receiver and the fan only comes on at certain volume levels. Unfortunately I now live in an apartment and can very rarely listen to it that loud. I had the same problem for a little while until I thought about moving the receiver to the lowest shelf with nothing on top of it. This seems to have worked so far although it does still get quite warm. Good luck!

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