Question about Audio Players & Recorders

2 Answers

SANSUI AMP AU-D11-II

TOOK THIS TO A LOCAL TEC. AND WAS TOLD THAT THE PROTECTOR CIRCUIT WAS BAD AND THAT IT WAS A FACTORY FIX.. WHEN TURNED ON THE LIGHT COMES ON AND THEN BLINKS RAPIDLY BUT THE SYSTEM DOES NOT START. I KNOW THE UNIT USE TO CLICK WHEN THE LIGHT WENT OUT. COULD THE SWITCHES BE BAD OR IS IT THE CIRCUIT PRIOR TO THE SWITCHES. I HAVE A SCHMETIC OF THE AMP BUT IT WON'T TROBLE SHOOT. ANY HELP WOULD BE APPRICIATED. THANKS DG

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

The D11 is a complex amp in its circuitry. It employs Sansui's x-balanced system. You need to clean the output relays and check the offset and bias (a multi-step process that is not possible without the service manual).

Posted on Dec 14, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 4,234 Answers

It is possible, but nlikely that the protection circuit is bad. More common are shorted output transistors or defective driver stage transistors. This should not be a difficult repair for anyone familiar with audio amps. Unsolder/remove Q22 and Q23 and measure the voltages at each of the 3 pads per transistor and post them here.

Thanks,
Dan

Posted on Nov 05, 2008

1 Suggested Answer

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Where can i buy a power transformer for Sansui 3900z ?


Let me guess...you took it somewhere for repair, and they told you it had a bad transformer and they couldn't fix it (after they took your money). Sansui began life as a transformer company, and unless something really silly was done (like replacing the stock fuse, which is probably 3 or 4A with a 15A fuse of something). I might mention that 'some' units sold for various locations have a thermal fuse installed internally to the transformer. I dunno if your model has this or not. I mention all of this because often times the phrase 'it has a bad transformer' is lame techspeak for 'I don't wanna fool with this thing'. If it blows the mains fuse on power up, then the most likely fault is that it has blown power transistors at the output of the amplifier. If it 'really' has an open primary winding in the power transformer, then it may well have a thermal fuse that has opened. Gary Brown in Orono, ME has fixed a few transformers for me with this issue. Google can help you find him.

Dec 24, 2014 | Sansui 3900z Stereo Receiver

1 Answer

Flash 8 times


When it flashes 8 times it is indicating a possible Audio Protector circuit fault. this circuit is located on the "AU" board. You will probably have to purchase a new AU Board if you were to attempt to fix it yourself!
Good Luck!
Rich Lilja

Dec 19, 2013 | Sony KDL-46XBR4 46 in. LCD Television

1 Answer

Au sansui d607x


If the speaker protection is activated then this would indicate that either a dc voltage is appearing across the speakers or a short circuit on one or more speaker cables. Since you are able to get normal sound through the headphone function the former is less likely and you should check for a possible shorting speaker cable. Another possible cause for the symptoms can be dry joints on the speaker protection relays.
regards from Vintie

Oct 28, 2013 | AKG Hearo 999 AudioSphere II Amplifier

1 Answer

Fuse blew and replaced, now sounds bad, what happened?


Fuse is blown because you may have bad DC to DC converter circuit (step up circuit from 12vdc to provide +-/- 30~40vdc) that supplys the power amp section. I can be that the output stage of the amp shorted out and it took out the DC to DC converter circuit.

Oct 31, 2009 | Infinity BassLink II Car Subwoofer

1 Answer

After power outage timer light is flashing and tv wont come on surge protector is ok


We had a similar problem with our Toshiba. It turned out to be that the mercury bulb was toast. Open the owner's manual & look in the Troubleshooting section. The blinking for us was indicitive of a bad bulb. Sure enough, we took it out & it was obviously cooked. Don't buy from a local store, buy it online. You'll save between $30-100 & our "cheaper" bulb has been working for 2 years. Hope this helps!

Sep 27, 2009 | Mitsubishi WS-65869 65" Rear Projection...

1 Answer

Tec patio II--convert from propane to NG


You'll need part #P2CKLP-NT Now all you have to do is find yourself a local TEC dealer

Jul 21, 2008 | Tec Patio II Grill

1 Answer

I have a Sansui AU-717 Integrated Amplifier that needs some work done on it. Is there a Sansui service center in Washington State that can work on this?


This company is not like they used to be. You can try the links below to see if you can find authorized service for your set.

Sansui:
http://www.sansui-india.com/

http://www.classicsansui.net/


Historic information about Sansui:
http://en.wikipedia.org/wiki/Sansui


I would personaly suggest to find a service center or a very good local tech who can do audio amplifier and reciever service.


Jerry G.

Apr 13, 2008 | Audio Players & Recorders

3 Answers

Sansui AU 3900 vintage 1974


Try rick at stereomanuals.com
The shutdown would be from a voltage supply in the power amp seeing too heavy a load and "shutting down" so that the amp doesnt Fry

Feb 28, 2008 | Audio Players & Recorders

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

933 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

100311 Answers

 Grubhead
Grubhead

Level 3 Expert

4706 Answers

The Knight
The Knight

Level 3 Expert

71095 Answers

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

Answer questions

Manuals & User Guides

Loading...