Question about Audio Players & Recorders

Open Question

The amplifier, when turned on, works for about 20-30 seconds and produces sound in the connected speakers on both channels (A and B), with the volume controls fully turned clockwise. I only tried with low input signal from mixing desk After this, enters in protect mode, and only the A channel protec LED on front pannel will light up, and will produce no more sound in the connected speakers on both channels I've downloaded the service repair manual from Yorkville website and it shows that it has 4 MJ15022 4 MJ15023 output transistors on each channel in the output stage Is it an output stage transistor failure? Might the failure be on both channels? Thanks in advande for anyone who can give a clue.

Posted by on

Ad

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

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

Ad

SOURCE: Output volume has dropped in right channel

dear sir,pls check the HT voltage fuse, LTsupplay also and out put stage,and volume controle,

Posted on Feb 01, 2007

Ad
Grubhead
  • 5126 Answers

SOURCE: Muffled/bad sound on 1 channel of Marantz PM4400 amplifier

Go directly to the main amp, follow the leads from the speaker terminals. And you should find something on an heatsink. If there are two transistors see if they are running hotter than the other channel. If you see any damage to them (compare with good channel) replace both!
If all you see is a black box with pins coming out of it you need to replace that. They sometimes have the letters STK on them.
Replace both types with the letters and numbers of the same type. IE 2SC 1220 or STK 589.

Posted on Feb 16, 2009

petraman7
  • 1175 Answers

SOURCE: Proton 520 Integrated Amplifier with quiet left channel

Hi...
Flush all the switches and controls with De-Oxit D5 or better.
Then get back to me.
Thanks

Posted on Mar 01, 2009

  • 4234 Answers

SOURCE: i have a yamaha amplifier in here for repairs, the

Measure DC to ground on the output transistors to check for any offset. The protect circuit is the least likely to be the problem. Post the readings here and I'll guide you from there.

Dan

Posted on Mar 11, 2009

  • 4234 Answers

SOURCE: Peavey 8.5c amplifier. One channel dead. In

FIrst of all, in bridge mode there is only one channel. The "bridge" means that you combine the two channels together to get a single more powerful amp. The swollen part is probably nothing. Sometimes the plastic caps cup like that. Unless there is a specific problem with the amp, don't worry about it. Try placing the amp into stereo mode and testing each channel. If both work, there is no problem with the amp. If for some reason you need repalcement capactors, contact Peavey directly. They supply replacement parts.

Dan

Posted on Mar 19, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Very week sound


Definitely need more info - such as type of amplifier or receiver, how many speakers you are running, whether the subwoofer is powered or not.
As a simple test procedure: Disconnect all speakers and plug in a pair of headphones. Get a strong audio signal? Good, move on. No signal or week signal, you have an amplifier issue before the audio even gets to the speakers.
Next: Disconnect all speakers, turn the volume down, and connect one speaker to the left output channel. Slowly increase the volume. If that works, do the same on the right channel. Everything OK? You're putting out enough gain on both channels. Sometimes one channel goes bad. You can still listen to your sound in mono moder, or drive two speakers from the single working output. Not stereo, but dual mono. Move on.
Connect left and right speakers but not the subwoofer. Repeat the test. Whatever is left is probably the problem. If the subwoofer is powered, check the power supply or incoming voltage. If the other speakers are driven off the subwoofer or powered from there, that's likely the problem.

Jul 31, 2015 | Audio Players & Recorders

1 Answer

The center chanel port does not produce sound and sparks when i plug the wires into the jack. all other chanels work except the center.


It seems that the center channel has DC voltage at the output terminals, center channel amplifier is blown and you need to bring the receiver into a repair shop. You can use a voltmeter to check DC at speaker terminals, all channels should have 0 volts when no input signal applied (or volume control set to minimum).
Do not connect your speaker you can damage it.

Jan 09, 2011 | Audio Players & Recorders

2 Answers

Onkyo TX-DS696 receiver center channel not working


Can you say explicitly that the Center Channel speaker is defined as something other than NONE?

And how does dialog sound? If it sounds ok you're routing it to the front speakers. This is from the manual...

"For ideal Surround effects, all speakers should be installed. If a
center speaker or subwoofer is not connected, the sound from the unused channel is properly distributed to the connected speakers in order to produce the best Surround sound possible."

Apr 10, 2010 | Audio Players & Recorders

1 Answer

Only get sound out of right side both a and b


Good day sir, Hi, your Philips receiver trouble can be any of the ff:
  1. your receiver left fuse is blown, check if it has a user fuse at the back. or
  2. your main IC amplifier for the left channel is bad. you need to replace that IC, but check first the wiring of the speakers.
  3. Check your receiver left speakers if it is producing a soft hum, to do this turn down the right channel, or adjusting the balance knob to the left, or simply remove the speaker connection of the right channel. place your ears on the left speaker as you adjust the volume up and down, do you hear a soft hum that goes up and down also? If yes the problem is on the source section before main amplification, usually the pre-amplifier stage, If you hear no hum at all. problem with the main left amplifier. The main amplifier is usually a single IC for both left and right channel, OR one IC amplifier for the left and one for the right, in both cases, replace the bad IC.

Jan 21, 2010 | Philips Audio Players & Recorders

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

1 Answer

Suddenly, amplifier stopped giving out sound. Controls and display seem to work fine. If it is blown fuse, where is it & how can i replace it?


Does it stop on both channels? It sounds to me like the safety circuit is activating. This usually happens when either the volume is too high, or the speaker load is too great (i.e. usually loads less than 4 ohms will do this) or, the amplifier has an internal short causing the amplifier's output stage to become un-balanced. Does the sound come out nice and clearly through both channels? How long does the receiver play before the sound stops? How loud are you playing the music when it stops like this? If the sound is reasonably clear through both channels at regular volume, then there is probably nothing at all wrong with the receiver's output circuits. If the amplifier is being played at regular volume or even lower volume for quite a while and then quits, perhaps the receiver is getting too hot and it's thermal sensors are activating the protection circuit. Make sure that when you operate the receiver, that there aren't things laying on top of it blocking the unit from venting and cooling properly. Make sure it has plenty of breathing room - amplifiers (most of them anyway) are inherently subject to producing heat. If the amplifier only quits when played at high volume, well then that's probably the problem - it's probably not meant to deliver such power that you're asking it to - especially if you're driving a heavy load such as 4 ohms or less. If you're running several speakers on this unit, try scaling back to just two speakers for now, and make sure these are 8 ohm speakers. Play the unit for a while and see how it does.

Oct 24, 2009 | Aiwa AV-DV95 Receiver

1 Answer

Hi I have got a sony TAFE 370 amplifier which does not produce any output, i have tried different input devices and also checked speaker wiring and the speaker selection is on i used it a day ago and all...


If you can't hear any sound from the headphone output, and by sound I mean a hum with the volume turned up, then the amp has either got a faulty internal power supply or the main amp has failed. Try looking inside to see if any fuse has blown. Also look around to see if you can see or smell anything has blown.

Sep 24, 2009 | Sony TA-FE370 2-Channel Amplifier

1 Answer

I have a kenwood kac-8452 4 channel amp that makes the speakers pulse after the volume gets turned up to 10. I also have a kenwood amp doing the same thing with my subs. any ideas?


Its not pulsing, its called clipping. The sound is being clipped due the amp being pushed past is power capacity and distorting the signal. This will damage your speakers very quickly. No amp should be turned more then 3/4 up. If its not loud enough you need to purchase a larger amp or be comfortable with the wattage it produces at 3/4 volume. You may also have speaker wires touching/crossed causing th issue.

Sep 10, 2009 | Kenwood KAC-8452 Car Audio Amplifier

1 Answer

P4500 yamaha amp


first check your input cable-disconnect it and check if the problem finished---you will have a problem in input(cable or device)-start with another cable then your input device.
if the problem still check your out put cables(speakers cables)for short circuit or touch the bare wire with amplifier body.-try to clean volume controls with spray contact cleaner---confirm good connection in amplifier rear and in speakers rear.

Aug 25, 2008 | Yamaha P4500 Power Amplifier 2-Channel

1 Answer

Gem Sound XP-350 both channels failed


Speaker fuses are generally fast-blow styles 250 volt glass
If an amp shuts down, with speakers connected, it sounds like one of the power supply lines does NOT like what it's "seeing" . Probably output transistors bad ( or module)

Take it to a tech.

Scott out.

Dec 02, 2007 | NAD C350 2-Channel Amplifier

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

Related Topics:

67 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

102366 Answers

 Grubhead
Grubhead

Level 3 Expert

5126 Answers

The Knight
The Knight

Level 3 Expert

74251 Answers

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

Answer questions

Manuals & User Guides

Loading...