Question about Technics SA-DX750 Receiver

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Technics sadx750 and says f70 and turn power off

A failure is f 70 and turn power off

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  • xXGreenSXx Mar 13, 2008

    I have the same problem. The first time it happened is when i split my RCA's to two sources. So I removed the splitter and hooked the RCA's up directly and the problem stopped. It has been a week since that happened and now its back. I checked all my RCA's for shorts or misconects and they were all Fine. I even tried removing all my RCA's and the problem still exsists. Please Help.

  • poopol Jul 17, 2008

    it started of with overload then IC601 and IC651 was replaced worked fine for a few weeks then started with F70 turn off power first occasionally now shortly after switch on

  • Anonymous Mar 05, 2009

    TENGO UN SINTO AMPLIFI. CUANDO LO ENCIENDO DICE F70 Y DESPUES TURN POWER OFF Y LOS FUSIBLES ESTAN BIEN, LAS SALIDAS Y LA FUENTE TAMBIEN Y NO SE POR DONDE TRABAJARLA. SI ALGUIEN ME PUEDE DAR ALGUN CONSEJO, LES AGRADEZCO. MI EMAIL JOLQUIM034@HOTMAIL.COM ME PUEDEN AVISAR LO MAS PRONTO. GRACIAS.

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Technics sadx750 and says f70 and turn power off

Posted on May 27, 2008

  • Gcia May 27, 2008

    a failure is f 70 and turn power off

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Hi
1>try this .
the DSP board cable check it if it is loose or defected .
2> check the supply voltage on the DSP board .
Good luck
Hope this helps

Posted on May 27, 2016

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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

F 70 APPEARS ON THE DISPLAY


Page 24:

"Turn the unit off, disconnect the AC power suplly cord, then reconnect and turn the unit on. Consult you dealer if "F 70" remains in the display.

http://service.us.panasonic.com/OPERMANPDF/SADX750.PDF'

Support: 1-800-211-PANA (7262)
http://www2.panasonic.com/consumer-electronics/support/Contact-Us.4

Jan 14, 2011 | Technics SA-DX750 Receiver

3 Answers

Problem with Technics SA-DX850


SA-DX750 (sister Model to SA-DX850). Showing error code F70, after a few minutes running. Checking the power rails revealed +5VA and +5VD, on the Digital Circuit Board 'A', dropping to about 2V, when fault occured. F5, T1A, on the Sub-Transformer Circuit 'M', was subject to occasional blowing. The problem was traced to an intermittent break, in the printed circuit board conductor, in the vicinity of Q1702 (+5VD regulator) collector, on the Digital Circuit Board 'A'.. Repairing this cured the problem. Note that removing F5 (above), or disconnecting CN702, CN1000A or CN904B, on the Digital Circuit board 'A', also causes this error code to be displayed. Failure of the audio output ICs, IC651 & IC801, is apparently the usual reason for this error code being dsiplayed, but it is worth checking the power rails viz. +/- 25V (Fuses F3 & F4, T6.3A, on Sub-Transformer Circuit 'M') +/- 55V, +/- 14V etc.

Aug 11, 2009 | Technics SA-DX850 Receiver

1 Answer

F70 on my reciever


Most likley it is in need of repair. I suspect the output IC. Check for bad solder connections on the IC and voltage regulators.
Remove the speakers and see if it still happens (it probably will).

Feb 11, 2009 | Technics SA-DX940

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

Could anybody tell me what F70 means ?


You must have air flow through this unit!...accordianman

Dec 04, 2007 | Technics SA-DX850 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

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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