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My studiomaster 1200d power amplifier sounds distorted on channel B but is fine on channel A. I've had the lid off and checked it & swaped all the leads over from channel A to channel B that did'nt work. I then found the problem, there's a square box behind the speckon connectors on the left hand side. Dont know what its called but would like to fix it with spare parts or a new one or a secondhand one. Does anyone have any ideas please? from kieran.

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6 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

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Posted on Jan 02, 2017

SOURCE: Onkyo TX-SV414PRO - Right channel has no audio, left channel works fine.

get a new receiver

Posted on Feb 10, 2008

tech48
  • 624 Answers

SOURCE: Denon AVR-3802 Front Left and Centre channel not working right

I work at an authorized Denon service center and have repaired lots of Denon receivers including this model. So bare with me, and trust that I really do know what I am talking about.

The first thing you need to do is find out if those two speakers may be at fault. You can do it very easy by disconnecting them and connect two of the known good speakers into the channels that the bad sound is coming from and then connect the suspected bad speakers in where those good speakers were connected to.

If the same speakers still sound bad, you know that you have a couple of bad speakers. I think that it is likely that the speakers are OK, but it is a good idea to make sure.

If the sound from the suspected bad channels is now still bad with the two good speakers, you have an internal amplifier problem or you have a problem on the digital board.

For your sake, I hope it is the amplifier that is giving you this problem, if it is, that can be fixed by a good audio technician.

If the problem is the digital board, you may be in for some real headaches. Not that many audio techs are very good at troubleshooting a digital board, its not their fault, it is just a very difficult job.

In either case, it will need to be looked at by a qualified technician.

I hesitate to tell you this, but the problem sounds like a digital board problem. In some rare cases, a technician with excellent soldering skills can reflow a couple if the memory IC's on the digital board and restore proper operation. If the technician is top notch and isolates the problem to a specific IC on the digital board, they can replace that IC and you are good to go.
But in most cases, the technician will not even bother trying to troubleshoot the digital board because it can take hours of troubleshooting, and just order the board if it is available. Most of them are available from Denon, but they are very expensive. Normally the part alone is $200 to $300 and I have seen many times where it takes months to get it.

You can also send it directly to Denon's factory service center and that will get your unit back much quicker. They have direct access to the boards, where-as the authorized service center must order it thru one of the Denon parts distributors and they do not always have them in stock. so you end up waiting for a long time.

If you need to send it to the Denon factory service, let me know and I will email you a return authorization form, this must be faxed or emialed to Denon with the proper information and then they will fax or email it back to you with the RA number which must be written on the outside of the box before shipping it to them.

I hope that this information wasn't to overwhelming, but if you found it helpful a good rating would really be appreciated. It helps to keep the experts on FixYa motivated and willing to answer the questions people have even it the answer is not very good news.
I received an "inappropriate" rating from somebody who just wasn't happy with the truth, and most people never even bother to rate our answers. But that's another whole subject.

let me know if you need more help.

Posted on Jun 22, 2008

welcomejee
  • 10594 Answers

SOURCE: number of inputs

Each CD Player has audio out put amplifier circuit and this output amp remains Mute until it receive signal to out it. While using Y-Connector, when you try to listen one player sound, other goes to Mute as its in Stop position and caused to minimize the out put of other player which is being played. That's why you listen good sound if just one is connected. If you want to connect both players at one amplifier, you need at-least 2 inputs in amplifier and since your Fisher amp has not 2 inputs, so I suggest to buy another amp equipped with 2 or more inputs. Hope this info will help you.

Posted on Aug 17, 2008

  • 2 Answers

SOURCE: Pioneer SX-750 Old School Need Help

Check the speaker wire. Sometimes it can just be loose in the terminals and cause distortion. I have had the problem before.

Cheers!
DellMan94

Posted on Jan 12, 2009

caroldon
  • 17129 Answers

SOURCE: My pioneer vsx-519V-k amp won't turn on. Just

Have you checked within the set, the fuse and if the standby circuit is working. thre could be a failure of this sub votage which is required for the switch on of the main power. If you do not have any standby indication you must check this section, however if you arre getting the standby you would have a failed output or a shorting that is triggering the error amp to swtich off. If you are familiar with the circuits you can check but I would suggest that since you will need more experience to look into the main board for tracing the fault. In such case check for the service centre nearest to the place you are in using a google search for Pioneer - Audio systems- sevice. Helpful I hope. Good day.

Posted on Jul 06, 2010

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Hi,
When you heared or noticed any burnout components,most probably from the regulators/rectifiers/IC's/ voltage limiting dides/ etc,it means you're having a problem on your driver up main outputsection in your circuits ,you have to check steps by step,n most cases,like this HIGH POWER AMPLIFEIRs,its using a high wattage transistor/Mosfet particularly,
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When you noticed your amplifier is having a problem like poping sound/motorboating sounds/burned components and smell/trembling with low freq sound and etc,
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OPTIONS:
In deep repairing and troubleshooting in any electronic equipments, it needs complete diagnostic tools/schematics/techniques,...experience and observation sometimes is required,
IF YOU DONT HAVE IT,ITS BETTER TO BRING YOUR AMPLIFIER IN A SERVICE SHOP,
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