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Sansui A200 amplifier dead right channel

Sansui a2000 integrated stereo amplifier dead right channel, power amplifier IC module is OK.

Posted by Anonymous on

5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

jerryg50
  • 1667 Answers

SOURCE: I have a Sansui AU-717

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.

Posted on Apr 13, 2008

  • 4234 Answers

SOURCE: Blown Channel on an amplifier

Look for low valued resistors that may look ok, but be open. Check the emitter resistors (.22 or .47 ohms). Check the transistors in the driver circuit as well.
Dan

Posted on Jun 06, 2008

  • 21 Answers

SOURCE: sansui au-G90x integrated amplifier connetcted

Dirth control switches and/or dirty/corroded/worn-out speaker relay.

Posted on Sep 03, 2009

  • 4234 Answers

SOURCE: I have a Fisher RS-717 stereo receiver, amplifier.

Yes you can use either A or B without a problem. The restriction is when you have both A & B connected. In that case, the speakers MUST be a minimum of 8 Ohm impedence. Using either A or B, you can use speakers of 4 Ohms impedence.

Dan

Posted on Nov 24, 2009

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Where to find the owners manual for the Sansui QRX 7500A?


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www.hifiengine.com/manual_library/sansui/qrx-7500.shtml
May 21, 2014 - sansui qrx-7500 four channel receiver. Sansui QRX-7500 ... service manual English - honestsoul99. Related Catalogues. HiFi Buyers Guide.

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My repairer just misplaced the ic for stereo integrated amplifier su-v50 class AA. So please help me with the ic number


A search with Google shows no such number. If this is truly a Class A amplifier, in my experience, there are no output ICs. Even so, unless they process both channels in one IC, there would be a complementory IC on the other channel.

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Actually I think you are looking for an STK4204 MK5. I would search google for where to get one, depending where you live.

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Check you have 14 volts on pin 3 of the driver chip for the meter.

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I am thinking of replacing my now very old JVC AX 330 amplifier with a Marantz PM7003 amplifier and want to know if this is a suitable replacement in terms of power output etc.


You, sir, are a rare adherent to stereo-only electronics. Are you replacing it for cause (showing its age)? The PM7003 is only 2 x 70 watts like the JVC but it also has separable preamp/amps so you COULD upgrade or augment the power output with external amps and still control it all locally.

Of course, any current AVR's do that too and bring digital sources and multichannel audio to the mix for as little as the PM7703 may cost.

Jun 23, 2011 | Audio Players & Recorders

1 Answer

Hi my amp left channel does not work. the speaker relee works at both channels and the amp works fine at the right side.it goes not in protect what do u think is wrong ?


It could be a number of things. Try this test first though. Play some music and swing the balance control to the bad channel and turn up the volume all the way if needs be. If you hear any music breaking in the pre-amp is ok. If not it could be dead. Again if you hear faint music it's the power amp that's not working.

Next have a look inside. You should be able to identify the channels by following the wires from the speakers. Remember that stereo amps are just two mono amps joined. So the Right Channel will act as a guide to what the left should look like. Plus if you are any good with a volt meter provide the correct voltage indications. Any burnt/damaged parts on the left and not on the right is an indication of the fault area. If you have no output from the above test pay close attention to those parts on the heat-sink for the affected channel.
Ignore the power supply parts are anything that is on it's own, unless it's an IC with both channels going into it. As they can go faulty on one channel, but not the other sometimes.
If you can't find anything it might be an idea to replace the left output device(s).

May 19, 2011 | NAD 218THX 2-Channel Amplifier

1 Answer

I have the xp 300 and in stereo mode it only works on one channel or the other, not as 2 seperate channels


If you are saying that it only works on say the left channel in stereo mode, but both channels come on in mono, then there's a fault in the amplifier's pre-amp. These days they are an IC, it can be traced by following the input wires to the point on the PC Board and then looking around for an IC with all inputs going in. If you are lucky there might be two! One for each channel. Replace the one on the dead channel. You can test it, either the single IC or both, touching it's pins with an insulated tool while the amp is on. It will buzz on the channel. Stereo amps have two sets of identical parts, except when an IC is involved. But even then that will have two halves (inside it). You just need to touch the pins of the IC, with the tool, but don't short the pins together! You should hear at least 4 buzzers. One at the right input, one at the left input, one each at the left and right output. If you only get the left an right output buzz, plus the good channel input buzz, you know it's the IC that's gone.

Mar 29, 2011 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

One (right) preamp blow! I've located the problem to the right C160 module. When disconnected everything seems fine. Diodes and transistors are apparantly ok measured onboard as are all resistors and...


hi...
transistors are not ok on the C160 module.
replace all the power transistors and emitter resistors for that channel.
www.bdent.com and www.ceitron.com are good for transistors

Sep 30, 2010 | NAD C370 2-Channel Amplifier

1 Answer

On my sonamp 260 when i hook up my cd or tape player to the amp i get no sound from the speakers out but, i get a little sound from the line out


I reckon the line out is for connecting the pre-amp section to a powered amp. Which is why you are hearing the weak signal. In which case it's clear to me that for some reason the power amp section in your Sonance is dead! Since it's a stereo amp it's something that has killed both channels. Like a power-amp IC such as the picture I'm posting below. Or something else that is accross both channels, but not the pre-amp section.
151dab0.jpg

Aug 27, 2010 | Sonance Sonamp 260 MKII 2-Channel...

1 Answer

Volume at 10 produces very low speaker output.!?


It sounds to me that all you are getting is the pre-amp stage of the amp and nothing from the power amp stage. As it is on both channels then it is something that is common to both. This could be something to do with the power supply of the power stage. Or whatever is on the heatsink. It could be that the amp uses a single audio amp IC for both channels. If it does my bet is that it's gone. If it uses two sets of semiconductors for the right & left channel it would be highly unlikely that both channels have gone, but not impossible.

Dec 27, 2009 | Audio Players & Recorders

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