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Aiwa mx 70 Amp powers on, no blown outputs, the

Aiwa mx 70 Amp powers on, no blown outputs, the speaker relay won't come on. Problem got worse from leaving the unit on for a minute, to 5 minutes or longer before the relay kicks in to now it doesn't kick in at all.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 13 Answers

SOURCE: No output to the speakers from any source

It seems to me that u have an output problem. ckeck the output components (either IC or transistor)and change them. good luck

Posted on Dec 21, 2006

  • 979 Answers

SOURCE: Power on problem

Time for a little repair here. It seems that one or more channels have developed an excessive drain on the supply, and has caused the threshold to trip and shut you down. It's more than likely shop time at this point....accordianman

Posted on Oct 25, 2007

  • 1 Answer

SOURCE: Denon DRA-25/25L Stereo Receiver.

Without looking at the schematics for this particular model, I'd surmise that the click is indeed a speaker protection relay. Generally this is fed by a number of different sense circuits that watch for power amp issues and/or excess speaker current and/or power supply output stability. Although the relays do indeed fail at times, generally it is not the relay that is at fault. If you have a scope and a schematic, you can check the various circuits that feed the relay for the exact cause. If not, you can do some experiments that might help deduce the problem: e.g. do headphones work when speakers do not, does the relay click on when no speakers are connected (or selected), etc. In my experience, it is most often the output transistor(s) in the power amp. But not always ;-)

Posted on Oct 15, 2008

hokuwho
  • 306 Answers

SOURCE: My bose car stereo system

The problem is in the power amplifier section. If you a preamp out connector you can troubleshoot using another power amp between that and the speakers but you may need a schematic to isolate to the components at fault. Bose is worth fixing and if you can remove it yourself you will save money by getting it to a bench technician, even a TV repair shop can fix it. Steve Medley

Posted on Nov 08, 2008

  • 4234 Answers

SOURCE: no audio output - Marantz 2238

This can be as simple as a poor connection somwhere in the voltage regulator circuit or a defective driver transistor or output transistor. In any case, this is a simple repair for any shop that works on vintage receivers. If it is the outputs, that will be the most expensive repair from a parts perspective. The outputs will cost in the $5-$10 range for each one and it could be 2-4 pieces. If you wish to attempt this repair yourself, you will need a multimeter that has a diode checker. Let me know and I'll provide additional details and instructions.

Dan

Posted on Apr 06, 2009

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1 Answer

How do i hook up my Aiwa 90 watt self powered subwoofer to this Onkya A-8037 stereo amp there are only two auxiliary ports in the back and both are used by the stereo.


Your powered subwoofer should have two different pairs of inputs - one is a line input that is connected to a subwoofer output on your amp. The other inputs are those that are directly connected to the existing speaker outputs on your amp.

When you have all working make sure that the sub output is in phase with your other speakers lest you have bass cancellation.

Jun 20, 2015 | Car Audio & Video

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How can i repair amp


Looks like the amplifier output transistors have blown (hence the pop). Quite expensive too repair - I would have a look on eBay for a cheap used but working Kenwood receiver, it would probably work out cheaper.

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My aiwa av-x200 click right off when I turn it on, Im thinking it is a blown fuse or something, anybody fixed any receiver with this problem?


The unit is going into protection mode. There is a fault detected in either the power supply or an overload on the output circuitry. Remove all connections to the amp (ie speakers, dvd players etc etc) Turn the unit on. If it still turns off the problem is internal and should be looked at by a qualified technician.

Feb 09, 2010 | Aiwa AV-X200

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When I turn on my aiwa stereo I hear a clicking noise and it turns off and loses power.


This is an overload protection feature. Check for speaker wires shorted to ground or a blown component.

Sep 20, 2009 | Aiwa AV-X100 Receiver

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I have a pioneer receiver..vs 812....and sound has ceased to come out of it. It comes on....and switches between sources...but there is no signal coming from ANY source


First make sure the speaker A/B switch is on.
If still no sound, dissconect ALL speakers from the rear of amp.
Now turn on amp and listen for the relays to click in.
One relay will click when you press power. A couple of seconds later, the speaker relay will click in.
If it does, you could have blown outputs, bad speaker wiring, faulty speakers.
If it does not, the speaker relay may be faulty.
Hope this helps.

Sep 12, 2009 | Pioneer VSX-D812 Receiver

1 Answer

Power lite is on but nothing happens when power on is pushed


Check your Speaker control button. Most receivers have a small button on the front used to control your choice of Speaker Set A, B, A & B, or NONE. It's possible you have inadvertently pressed the button and set it to where no speaker set is selected. Therefore, no sound.
Another probable cause is that one of your speaker cables may have become dislodged at the back, and if your system has an overload control mechanism, it's preventing sound to come out to avoid damaging your output transistors, your speaker system, or both.
The last (I hope not) possibility is that the volume may have been cranked up too high, that either the output resistors may have blown on your receiver, or your speakers may have given out the ghost due to too high a signal.
Good luck!

Aug 17, 2009 | Aiwa AV-D57 Receiver

1 Answer

Standy mode system wil not turn on


When you connected the speakers, one of the following may have occurred: 1) Crossed the wires (smoked the outputs) 2) Presented too low an impedence load to the amp section (overheated and smoked) There are other possibilities as well, but those are the most common. In any case, try disconnecting hte speakers altogether and trying to turn on the system. If it turns on, then the problem is either the wiring or a bad speaker. If the system stil won't power up completely, then the output section needs to be checked. These units have discrete output transistors that can be checked by a service shop. These are not too expensive but are somewhat unique to Aiwa systems. Figure on $20-$40 for parts. Dan

Jun 15, 2009 | Aiwa Audio Players & Recorders

1 Answer

MPA-101 Amplifier powers on, receives source signal, the fuse is not blown inside, but no sound comes out of the amplifier. The amp is pretty new, doesn't even have dust inside the unit.


Hello, is this a Radio Shack PA amp or Jamo amp? The unit is probably in "Protect" mode. Is this a PA system or a receiver...receivers have a protection circuit that will not let the speaker relay activate if the amplifier output section is shorted and sending voltage towards the speakers...so they won't fry!!The speaker relay should activate within 3 to 5 seconds if your output section is ok.

barneyluc

Oct 13, 2008 | Audio Players & Recorders

1 Answer

Leem m86t power mixer amplifier


probably blew the amps or the pre amp section

Sep 09, 2008 | Car Audio & Video

1 Answer

Power turns off immedietly


Yeppers, when you where changing out those speakers, you shorted them and that in turn blew out the audio output IC inside this unit. This will require you to disassemble the unit, locate the blow output IC abd unsolder it, get a new audio output IC, put some heatsink compound on the back of the new IC, resolder the chip and reasassemble the unit. But before you turn on the unit, double check those speaker wires again to make sure they are not shorted as if they are, even one tiny strand, this unit will blow the IC again. Never work the speaker on any solid state electronic amp when they are plugged in and on. Good Luck

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