Question about Sony MHC-NX3AV Shelf System

1 Answer

No radio My Sony started to buzz in Pro-logic mode & now for some reason the radio will not work, any clues? all the wires are in the right place.

Posted by on

  • 1 more comment 
  • omegamen Jun 15, 2008

    Exactly the same problem.... wish I could get it repaired... 15th June 2008

  • surprisingly Nov 19, 2008

    I have the same problem, noticed it yesterday. When I switch on the 5.1 speakers, the buzzing starts. It happens either by using the Pro-Logic mode, or by using the DVD 5.1 mode.

    I opened up the system (warranty is wayyy out of date - bought it in Feb 2000) and found out that the side board was cracked at the point it is screwed to the bottom panel. Now this may or may not cause the problem in my case. It is a small crack and also no routes appear to be broken in the IC. However, it might function as a ground connection and be needed.


  • Anonymous May 03, 2009

    Same problem - buzzing in the rear three channels in any mode where the rear speakers are enabled. Haven't taken it apart yet, but I am handy with a soldering iron, so will try the suggested cap kit.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

HI,
Here is the solution for your problem.
You have to look at the 10volt B+ on the mainboard.
This voltage goes to the tuner en other ic's.
You have to replace the next capacitors:
C921 470/25v, C922 1000/35v, C920 1000/16v, C924 47/16 and
C927 100/16v.
The best to replace them witch 105 degrees capacitors, then the problem don't come back again.

Good luck

Ben Bierhuis
ben@dbinet.nl

Posted on Jan 14, 2009

  • Jose Luis Perez Jun 28, 2013

    Great! It was C921. You're the boss. Thanks a lot.

  • Jose Luis Perez Jun 28, 2013

    Great! It was C921, as you said. You're the boss. Thanks a lot.

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Sony stacking system LBTd505, the sound from the record deck suddenly went very faint. The cd and radio sections are fine. I have tried a new stylus, but no difference. Any ideas?


You have two options. First a faulty cartridge. Or a faulty pre-amp in the main amp.
You can find out if the cartridge (and amp) are playing up. By removing the connectors on the cartridge.
Then with the volume turned up to about half, with your finger, touch each one of the wires one at a time. It will not harm you at all. But you should hear a loud buzz on one wire on the right and a loud buzz on the left on another wire.
The two other wires will either produce a crackle, or a tiny buzz, or nothing at all.
If you do hear a loud buzz on two wires. The cartridge is faulty and needs replacing.
If you hear a slight buzz on them or weak sound. There is either a bad connection between the deck and amp. Or the pre-amp inside the deck which is only used by the record deck so will not effect any other function, is faulty.
You can remove the record deck connections to the amp and again with the amp on half full, touch the inputs with your finger. If you are not hearing a loud hum or buzz, the pre-amp is faulty. If you do the connectors are faulty.

Jun 11, 2016 | Sony Audio Shelf Systems

1 Answer

Bose wave radio CD RCA inputs buzz after a few minutes of playing input from my computer. When I touch the jacks the buzz usually goes away for several more minutes.


i probably wouldnt try souldering them because you have a high chance of melting that wire since it is extremely thin and its usually fiberoptic but you may have something frayed inside the input jack itself like a loose ground or a loose connection i would look their as well. When it comes to music i would throw away the input chords and buy new ones

Jan 11, 2014 | Bose Wave radio/CD remote control -...

1 Answer

Sony hcd-gx470 manual


My Sony Mini MHC-GX470 have been working until a power outage yesterday and now it will start coming on the goes back to standby mode. I can hear it going through the system, starts the radio and immediately goes to STANDBY.
I need HELP!!!!!!!!!!!!!!!!!!!!!!!!

Jan 07, 2012 | Sony MHC-GX555 Mini Hi-Fi System Shelf...

1 Answer

Sony SA-VA10 Shelf System Powered Monitor Speakers. Constant Buzz .. around 1K . .sounds like power supply. Not attenuated by increase in amp volume. Help


Secondly sounds like the power supply filter capacitor has gone bad. Write down the value off the label and purchase one at your local electronics parts place. It will only be two solder leads to unsolder and solder back. But first check the other place for that symptom, an open ground near the input jack going into the amplifier, or broken input wire/plug.

May 19, 2010 | Sony SA-VA10 Shelf System

1 Answer

There is no sound in the left speaker when i play LP's. When i play CD's and the radio both speakers work, but when i play records sound only comes out of the right speaker. What's up with that?


Two possible reasons. First a faulty cartridge. With the amp on the phono setting, lift the arm up and you should see wires coming out of the cartridge. Make a note of how they fit or remove them from it one at a time. With your finger touching each wire, you should hear a buzz on at least two of the wires (one on the left and one on the right). If you do then the cartridge has gone! If you still don't get a buzz on the left, then the cartridge pre-amp has failed. Most likely an IC.

May 06, 2010 | Crosley CR79 CD Shelf System

1 Answer

Sony ICF-CDK50 (under counter kitchen clock radio) just installed, everything works fine except for sporadic intermittent beeping (3 to 5 beeps). Instructions give no clue as to cause or solution.


sorry, I can't shed much light on this problem, but it appears to have been fixed. We played around with setting the time, although it didn't need fixing and with the timer.

Jan 02, 2010 | Sony ICF-CDK50 Under Counter CD...

1 Answer

Saying protect and wot let us use it


This unit will go into protection MODE for a number of reasons It has eight quick blow fuses inside the can to add to the over all protection, I have repaired electronic equipment for years and I have never come across such a well protected system. having said that I am working on a unit now that buzzes and the volume will go up when turning it up or (down) on the unit itself the remote works to turn it up or down. So your trouble take the can apart and make sure the plugs (ribbon wires) are all seated properly then try.
Presuming you have already made sure the speaker wires are in the right places and not crossing from frayed wires.
Seating the wires and cleaning the dust may just fix your troubles.
Any unit that has a fan is doubling as an air filter and there are some transistors and IC’s that will over heat in this system.

Oct 26, 2008 | JVC HX-D7 Shelf System

1 Answer

Buzz from speakers or headphone when CD is played.


This is due to improper insulation of wires or improper isolation of power unit with the rest of the unit.

Thankyou

Feb 10, 2008 | Teac CD-X8 CD Shelf System

2 Answers

"Protect" message


It is most likely an amplifier problem. I had this problem before. It went into "Protect" mode and shut down. When I turned it back on, my left channel speakers made a buzzing noise and did the same thing again. I got it diagnosed at an electronics repair shop and they found that the two STK amplifier IC's were bad. One is about $106 and the second one is about $78. I got it fixed for about $200 and works basically like new again.

Nov 20, 2007 | JVC MX-GT88 CD Shelf System

1 Answer

Have no sound on front and rear speakers...


looking at the front of the unit take the left side pannel and replace the fuses. ive had to do that with mine several times because of the same problem

Sep 10, 2006 | Sharp CD-C460 Shelf System

Not finding what you are looking for?
Sony MHC-NX3AV Shelf System Logo

Related Topics:

215 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Audio Shelf Systems Experts

The Knight
The Knight

Level 3 Expert

68323 Answers

 Grubhead
Grubhead

Level 3 Expert

4590 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Sony Audio Shelf System Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...