Question about Technics SA-DX750 Receiver

1 Answer

What causes the sound to cut for a few seconds?

After approximately 80 minutes of watching TV (regardless of the source), my Technics audio receiver will have moments of "mute" of approximately 3 seconds, at regular but increasing intervals (more and more frequents). It starts at once every minute or so, and increases to once every 15-20 seconds. All my devides are plugged in my TV via HDMI, and my TV is connected to my receiver via an optic cable. If I leave the TV speakers on, they keep going when my receiver stops, to the problem is either in the cable or the receiver. Since the problem is agravating after some time, I'm thiking overheating. Defective fan, maybe? Thanks!

Posted by on

  • Thomas Belanger
    Thomas Belanger Nov 24, 2014

    I've tried multiple combinations of inputs and speakers, and the problem keeps happening, unless I remove the casing of the amplifier. I guess we are really looking at an overheating problem. 2 things I'm wondering now: the instruction manual of my amp (a 1050 btw) says the fan will only start when high output is requested. It doesn't start, but how can I know if the fan is defective, or if the amp hasn't reached its "venting point"? Also, I've been told that overheating is likely caused by a bad weld. Is there a way to spot a bad weld? Thanks for your help.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 88 Answers

Hi i just would to know if you did try to connect your TV by HDMI to test if your optical output of your reciever/amplifier have some problem. In second time yes maybe you can have an overheating problem, just take a look at your grid and maybe a clean-up will be necessary. I don't think your amplifier have a fan.
Don't hesitate to contact me here in this post. have a nice day.

Posted on Nov 11, 2014

Testimonial: "Hi Fabrice. Thanks for your answer. Did you mean "optical input"? My cable terminal and PS4 are connected to my TV via HDMI, and my TV is connected to the amplifier's input via optical cable. So you suggest connecting straight from the cable terminal to the amplifier via HDMI? The fact that the problem only occurs after approximately 80 minutes, and then repeats itself, made me think it couldn't be a cable problem. I don't know that I cable can get "tired" - stop working after a long use. I might not have selected the exact same model of Technics amplifier, althought it does look the same, but my amp does have a fan. It's attached to the rear left side. I can see the paddles/blades and they don't seem to be turning."

  • 4 more comments 
  • Sserpentio
    Sserpentio Nov 11, 2014

    Ok I didn't the problem is the optical cable but the optical bloc inside your amplifier, it's why you have to try an another way like the HDMI port.

  • Sserpentio
    Sserpentio Nov 11, 2014

    And i forgot something else if your fan doesn't turn it's probably a overheating problem. So you have to open your amplifier if you seem to do it and check the power in the input of your fan. If the power come in so you have to replace this fan. If you wouldn't open your amplifier you have to go to a repairshop. So if you want more with me don't hesitate, have a nice day.

  • Thomas Belanger
    Thomas Belanger Nov 11, 2014

    I'll look at these possibilities tonight. Maybe the fan only kicks in when volume is higher than a certain level, I'll check that too.

  • Thomas Belanger
    Thomas Belanger Nov 11, 2014

    Could it be that the speakers I use are a bad match for the amp, and the amp "cuts off" as a protection? I'm pretty sure I checked that they were a match impedence-wise, but maybe there's something else I overlooked. Do you think I should test it with different speakers?

  • Sserpentio
    Sserpentio Nov 11, 2014

    I don't think about e real problem with your speakers. the overload protection should be start earlier than 80mn

  • Thomas Belanger
    Thomas Belanger Nov 24, 2014

    OK so I've tried multiple combinations of inputs and speakers, and the problem happens with every one of them, unless I remove the casing of the amplifier. I guess I'm really looking at overheating... I've checked the manual of my amp (which is a 1050 btw, not a 750) and it says the fan will only run if the amp has to provide a really high output. Now I haven't seen it start so far, so I'm wondering if it is defective, or if the amp has not reached it's output level. Is there a way I can verify this? Also, is there a way I can have it work full time? I've been told overheating is likely to be caused by a bad weld. Is there a way to spot a bad weld that would cause overheating? Thanks for your help.

×

4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 4234 Answers

SOURCE: Technics SA-DX930. I ran digital optical cable

If the only thing not working is the optical input, it is possible that the optical converter is defective. Without seeing the actual unit and testing the IC, I can't say for sure. If you have test equipment, let me know and we will attempt to track this down.

Dan

Posted on Mar 03, 2009

  • 2 Answers

SOURCE: digital optical output for technics 5.1 surround sound receiver

I went to the HDTV plasma manual. It stated the only way the digital optical audio output would work (from this TV) was to go to the menu, select audio and turn off the TV speakers. Basically, it had nothing to do with the technics receiver.

Posted on Sep 17, 2009

Testimonial: "worked like a champ!"

  • 1 Answer

SOURCE: Sir, I have a technics

its heating up just place a fan on to of reciever blowing in

Posted on Nov 04, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Pioneer VSX-1027-K receiver sound cuts out for a second or two a few times a minute. Just started happening with no new connections added to the receiver.


This is not a firmware problem. It is an HDMI cable problem. Disconnect everything and only connect one source at a time and see if that takes care of your problem. Try different combinations of inputs and cables with only one device. If you find that works then you have a bad jack or a bad cable. You wont always lose your signal totally with a bad cable.

May 16, 2016 | Pioneer Audio Players & Recorders

1 Answer

I CANNOT GET MY SONY TV #KD-34XBR960 TO PLAY THROUGH THIS RECEIVER.


TV's don't play through receivers. TV sound might. If it comes from a Cable Box, connect the Cable Box digital audio to the receiver as you would any other high-end audio device; and the Cable Box's standard analog audio to the TV for those times you don't need the Technics audio capabilites (like watching news).

Have you looked at the manuals?

Apr 03, 2011 | Technics SA-DX750 Receiver

1 Answer

No tv sound through reciever's speakers. How do I hook up?


TV is not customarily a sound source. It is a video destination. Get your TV-related audio to the receiver from the same places the TV gets it - each source device's audio outputs.

Feb 06, 2010 | Technics SA-DX750 Receiver

1 Answer

Digital optical output for technics 5.1 surround sound receiver


I went to the HDTV plasma manual. It stated the only way the digital optical audio output would work (from this TV) was to go to the menu, select audio and turn off the TV speakers. Basically, it had nothing to do with the technics receiver.

Sep 16, 2009 | Technics SA-DX930 Receiver

1 Answer

My onkyo txsr806 is giving me problems. it is connected via hdmi but the volume goes in and out??? it makes no difference if i am watching tv or dvd.


I briefly had sound from this receiver but it failed and has now been submitted for warranty repair. Your receiver may be failing similarly. I could not get sound from the front channel speakers regardless of the source after the failure.

Dec 02, 2008 | Onkyo Audio Players & Recorders

1 Answer

Onkyo TX-SR805 - surround sound problem


The speaker impedance is not the problem.

Apr 09, 2017 | Onkyo TX-SR803 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

No audio coming from my receiver


my speakers call creative on my computer wont work they use to,i hear sound but not audible

Aug 12, 2007 | Onkyo TX-NR1000 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

Not finding what you are looking for?
Technics SA-DX750 Receiver Logo

99 people viewed this question

Ask a Question

Usually answered in minutes!

Top Technics Audio Players & Recorders Experts

 Grubhead
Grubhead

Level 3 Expert

5047 Answers

T-Comtech Repairs
T-Comtech Repairs

Level 2 Expert

417 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

Are you a Technics Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...