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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I have panasonic sa he7. My problem is error f70 overload.There was a electrical failure in my speaker. After that reciever showed f70 overload error. Fuse is not the original one. After that every ti


You may have a speaker connected that the amplifier cannot drive. Your receiver is compatible with speakers with 6-8ohm rating, however, even though your speakers may be operating within that range they may also have low sensitivity.
With the receiver turned off, disconnect the power cord for a few minutes, reconnect and then power it back on. And while you're behind the unit, that would be the convenient moment to inspect your speaker terminals...check for cracks, evidence of arcing and any stray pieces of strand wire that can touch the chassis or other terminals. If any of those conditions exist then that can a root cause of the problem and will have to be repaired.
You must also ensure that all of the chassis vents are not blocked and the unit does not have another device on top of it that also generates heat as well. In any event, keep it cool.
After that, enter into your speaker setup menu and adjust your crossover to a higher point for whichever speaker you had the failure. This will help control the overload condition, if in fact, it is being caused by your amplifier ability to drive your current speakers.

If after all of the above is performed and the condition still exists, try speakers with compatible ohm rating but higher sensitivity.

Dec 05, 2014 | Panasonic SA-HE7 Receiver

2 Answers

Its showing F70 error on display. Only workd on DVD mode, when i turn it on any other mode it just shows F70, switch power off. All fuses are ok, no any visibly damaged components


The fuse is a part of the problem it is for safety measures
the problem is in between the power supply regulators, capacitors and power amplifier circuit board.
usually a regulator or an output transistor can cause this error.
hope this helps.


its-showing-f70-error-display-only-hsr1hry0r110iqa53bzttpz3-5-0.jpg

Aug 08, 2014 | Panasonic SA-HE70 Receiver

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

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