Question about Technics SA-DX950 Receiver

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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

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  • Anonymous Jun 07, 2008

    tengo un amlificador technics modelo sa-dx950 al prenderlo aparse el codigo f70 si ce pulsa al guna orden aparese off power wiche y de nuevo f70

  • melanto123 Oct 02, 2008

    yes i do have the same problem with unit, it reminds me the older version F16 code. I turn the unit ON and after a few sec. I get F70.

  • bfairchild Dec 23, 2008

    A few minutes after I power on my amplifier it displays an F70 error message and asks me to turn off power. I power down and let it cool off. When I power up again I get the same error message a few minutes later.

  • Anonymous May 14, 2009

    A few minutes after I power on my amplifier it displays an F70 error message and asks me to turn off power. I power down and let it cool off. When I power up again I get the same error message a few minutes later.

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

Posted on Sep 24, 2008

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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...

Posted on Aug 06, 2010

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My dx 850 does this.press the dvd channel 6 button on front of panel.this should light up green.now you can watch dvds use consoles with no sound or power problems.

Posted on Jul 23, 2007

  • rjaduthie Aug 22, 2017

    I have a Technics SA-DX950, which has recently started displaying the F70 Switch Power Off message. At first it was after listening to some audio for a while and would reset when power cycled; now it's on power on, when either A or B speakers are selected (Speakers Off message when neither are selected). However, when you select DVD 6ch as suggested here, before the F70 message appears, the message does not appear and, indeed, you can play audio through the amp with the DVD 6ch Front RL channels. I would still like to fix the main problem with the amp, as I use the other input channels (e.g. phono).

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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...


Hi!

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.

Regards,

Bogdan

Aug 21, 2011 | Technics SA-DX950 Receiver

1 Answer

Technics sa-dx 950. F70 on display. ???


This is a shorthand version of protect. See the link below. If you have more questions, please post them here and I'll respond.

Thanks,
Dan

Link: http://www.fixya.com/support/r5390728-protector_means

Aug 21, 2010 | 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

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.

Dan

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?

Thanks,
Dan

Dec 04, 2008 | Technics SA-DX950 Receiver

2 Answers

Technics sadx750 and says f70 and turn power off


Technics sadx750 and says f70 and turn power off

Feb 27, 2008 | Technics SA-DX750 Receiver

2 Answers

F70


The system has detected a fault in the output section. How much are you asking of the system? Greater than 50%? That will push most systems to their limit in a short period of time...accordianman

Jan 14, 2008 | Technics SA-DX850 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

1 Answer

What is F70???


F70 means Blown Internal Fuse change the internal fuse and that should solve the problem if not you may have to change the output

Oct 30, 2007 | Technics SA-DX750 Receiver

1 Answer

F70 Error on SH-AC300


unit has a blown internal fuse. replace it with exact type of fuse and see what happens. if it blows again, it will need to be returned to a service agent

Sep 25, 2007 | Technics SA-DX950 Receiver

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