Question about Amplifiers & Preamps

1 Answer

Power amp one side went out protrction stays on

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 38 Answers

Protection comes on when DC voltage is present on centre rail. Replace defective components to resolove this issue. Protection prevents DC travelling through speakers and destroying them.

Posted on Mar 03, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My amp was blinking while it was working then it went off.Now it doesn't power up..Crown Xti 4000


Power supply likely failed. Electrolytics are the primary culprit.
It should have a switchmode power supply, so it is lmost likely the 5 volt section failed.

Sep 17, 2012 | Crown XTi 4000 Amplifier

1 Answer

I have a crown 802 amp,,, lastnight set up to play got everything going playing music threw it and then,,,,10 min later it sounded like someone pulled the power on there ,,went over to kick it back on and...


Hello
surely there is some short circuit inside you amp, which causes heavy current flow, when you switch On it now. The main cause of this type of fault is with shorted audio output section inside the printed circuit baord. will have any shorted Integrated circuit [IC] or power transistor or MOSFET.
Your amp need service. Never switch in ON, until the fault has been rectified, as it may cause more component to be get damged.
Get it serviced by any expereienced service technician, as this work is skilled one, must have thorough knoledge in electronics, all tools to do the work, ability to loacate the faulty component etc. If you have all these, inform me. I'm happy to assist you further. The more you need is patience and concentration. OK.

Feb 05, 2012 | Crown XLS 802 D Amplifier

1 Answer

The red protect light went on the amp is not working. Is there a fuse that has blown?


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as a root cause for intermittent shutdown.

Apr 18, 2011 | Crest Audio CA 6 Amplifier

1 Answer

Got an Alesis RA-150 off eBay to replace my RA-100, which worked great but I wanted more power. Was travelling when it arrived and my time to respond back to Seller has expired. With right channel set to...


it may be an open input side coupling capacitor in the feedback circuit around the power amp. if the amp has a limiter in it it may be stuck. here is the service manual, in any case.

http://forum.vegalab.ru/attachment.php?attachmentid=75690&d=1265371278

Dec 03, 2010 | Alesis RA-150 Amplifier

1 Answer

How do i bi amp sx 1250 to get both channels of each side to work together


you are actually not bi-amping the unit, you are bridging the amp. this really only works as long as all channels produce equal power. next the bad news is that typically home stereo amps are not wired internally to bridge channels.

bi-amping a speaker refers to connecting on channel to the highs and on channel to the lows. the receiver would need to be be able to process the outputs via a crossover network to split the frequency range in half so the appropriate frequencies went to the correct speaker.

Sep 21, 2009 | Sunfire Theater Grand Amplifier

1 Answer

What does parallel mean on my marathon 3050 power amp?


parallel mean that you connect speakers wire together to amp(positive side with positive side and negative side with negative side)in this situation you got less resistance from speakers and more current.
i mean more sound level.

Apr 11, 2009 | Marathon DJ-2000 Amplifier

1 Answer

SONY TA-N77ES POWERS ON BUT PROTECTION LIGHT STAYS


dry joints are common in sony (and others), needs a tech repair\visit

Apr 05, 2009 | Amplifiers & Preamps

1 Answer

Bose SA-3 Amp / Blown Fuse


The problem is not the transformer. You now have shorted output transistors at the very least. By corssing the wires you presented a zero(0) ohm impedence load to the output section. It quickly went into overload. Before the fuses had a chance to open up, the outputs fried. This unit will require new output transistors and perhaps the previous driver circuit will require parts as well. Figure on $20-$50 in parts plus hte local labor rate for the repair.

Dan

Sep 25, 2008 | Bose Lifestyle SA-3 2-Channel Amplifier

Not finding what you are looking for?
Amplifiers & Preamps Logo

Related Topics:

62 people viewed this question

Ask a Question

Usually answered in minutes!

Top Amplifiers & Preamps Experts

 Grubhead
Grubhead

Level 3 Expert

4590 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68323 Answers

Are you an Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...