Question about Technics SA-DX950 Receiver

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Adam's Problem Hi there my name is Adam I have a SA-DX950 All I installed to the back is my computer Cables Red And White, My speakers encluding a floor sub woofer The promblem is when I turn on the unit it shoots back to off and say I over loaded it turn down all Volumes and this time I can Bearly Hear it and when I tujrn it up slowly it dose the same thing Whats Wrong

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Re: Adam's Problem

You have a short circuit occurring in speaker outputs. If you are using the high power inputs of the sub, try disconnecting them first. check polarity of speaker connections to sub also.

Posted on Dec 10, 2007

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I connected a speaker bar directly to my new LG TV. The speakers came with two audio cables ( red & white) and one video cable (yellow). I connected the red & white cables to both devices - red...

You can only get the television to recognize the external audio when connecting to its audio OUTPUT. If it does not say OUTPUT on the television where you've connected the red and white cables between it and the spear bar it is not going to work. You'll have to connect all your devices to the speaker bar with red and white cables and to the television with a yellow or green, blue, and red cable for video.

Aug 29, 2011 | Audio & Video Receivers

2 Answers

I have a Technics SA - DX750 Amp Everytime I turn it on I get an error message F70 and then it requests that I turn the power off. This is all it does now, so sound. How do I solve this issue I have...


The F70 error certainly indicates a blown fuse inside.
The real problem is why the fuse is blown: there are only two possible reasons
1. there is a short circuit on the output (lines or speakers)
2. you have a blown output transistor (and that means some work and skills to replace).

To be sure, please change the fuse with a same rated fuse (buy more than one because it can blow again). Disconnect the speakers and turn the amp on. If the fuse blows again, it is sure something wrong with the output transistors. If the fuse remains ok, then please check all the wiring to the speakers.

Hope it helped.



Aug 21, 2011 | Technics SA-DX950 Receiver

1 Answer

I have a technics reciver SA-DX950 when i tnru on it say F70 on the display

problem is oxidation...Remove and clean the ends of cables with sandpaper slowly...there is slim and flat cable into the reciver (together with five cable)...specially remove it's socket and clean it...

May 09, 2010 | Technics SA-DX950 Receiver

1 Answer

When DVD uses DTS Sound, doesn't use 5.1

The bitstream sent out by the BluRay player is selectable via menus on thedisk. And the player itself may have a menu that allows it. Would need to know more about the source.

Feb 21, 2010 | Technics SA-DX950 Receiver

1 Answer

No, I made sure the "a" and "b" indicators were lit. Have tried it with "a" and "b" separately as well. The right channel went out first followed by the rest.

Found the relay for the front speakers not switching. The relay was soldered to the board so I just rigged the contacts together effectively by-passing the relay. Works great now.

Nov 23, 2009 | Technics SA-DX950 Receiver

1 Answer

Technics SA-DX950 intermitently sounds blown out

There are poor solder connections at the output amp pacs and the voltage regulators. Once these are resoldered the problem should go away. If you can solder, resolder any connections that appear grainy or have rings. If you can not, this should be effectively a labor only repair for any shop that works on audio gear.


Feb 18, 2009 | Technics SA-DX950 Receiver

2 Answers

Technics SA-DX950 has lost digital sound

This may sound like a silly check, but verify that the tape monitor switch is not engaged. What is the quality of the sound when turned up? Is the cound clear or raspy?


Dec 04, 2008 | Technics SA-DX950 Receiver

1 Answer

Technics SA-DX950 surround sound problems

The most likely culprit here is the output protection relay. The contacts are a little corroded and the higher volume "jumps the gap" temporarily "cleaning" the contacts. The relay should be changed. I don't have the manual with me, but the following relays are in the unit. One of them is the speaker relay:

Part # Cost
RSY0054-C $12.63
RSY0040M-0 $ 5.89
K6B2AHA00014 $ 8.14


Nov 12, 2008 | Technics SA-DX950 Receiver

1 Answer

Technics SA-DX950

sounds like the speaker protection relay is operating probably from a dc condition appearing on power amplifiers outputs. probable cause is dry solder joints to the output stages. will need some reworking of the PA stage soldering to fix.

Dec 10, 2007 | Technics SA-DX950 Receiver

3 Answers

Technics SA-DX950

when turn on receiver , after few seconds got message
F70. when wants to do any operation with receiver got message SWITCH POWER OFF

Jun 25, 2007 | Technics SA-DX950 Receiver

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