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Kenwood amplifer KA-892 . Previously a bare speaker wire touched the outside cabinet and I found the 6amp fuse inside blown.replacment fuses blow as soon as the unit is turned on.Is there something else I should look for.

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6 Suggested Answers

techman
  • 3130 Answers

SOURCE: Protector

If you took all the speakers off the reciver then it still goes into protect, the reciver detects DC on the output lines. That means there is a short in the output stage of the amp. It could be an output device, or a diffencal Transistor. If you can trouble shoot solid state electronics then you should be able to find the faulty, but if not your experienced at electronic repair, am afraid it may cost more then the reciveris worth. Good Luck PS please dont forget to rate this thread

Posted on Oct 23, 2006

  • 6 Answers

SOURCE: denon avr 5800

I can help you solve this problem. However you must describe to me which fuse you have replaced. Is it the fuse on the power line or is it a fuse in the speaker line (which I highly doubt). usually this type of amplifier uses two technologies. One is transistors the second is integrated chips. This is in regard to the output stages. I assumed you speaker cables shorted each other while the volume was set at a high level with music playing. Anyway if you are willing I am able to help.

Posted on Sep 01, 2007

  • 4234 Answers

SOURCE: I have a kenwood KA

Most likely the output transistors are shorted. This causes the output stage to draw too much current and blows the fuses. Expect a parts cost around $20-$40. Add in the local labor rate for the total repair cost.
Dan

Posted on Apr 17, 2008

SOURCE: Kenwood AR 404 burning w/ open flame.

You are literally playing with fire. Obviously the unit is in dire need of service! Please, take unit in for check out by a pro/tech

Posted on Apr 27, 2008

  • 4234 Answers

SOURCE: Kenwood KR-A4070 blowing 5a 125v fuses

I am guessing that the ceramic resistor is close to the output transistors. I would also guess that one or more of the output transistors has shorted. This causes a high current draw that is blowing the fuse. You could also have a power supply problem. The ceramic resistor is a .22ohm dual emitter resistor that is used in the output stage. The transistors located close by are probably shorted and should be replaced. Start there and let us know what happens once the transistors and the resistor are changed.

Dan

Posted on Oct 10, 2008

  • 336 Answers

SOURCE: I have a Pioneer SX-1300 receiver (made about

It will need 2 output transistor replaced. They are attached to the lagre heat sink in the middle of the receiver. Printed on them will be a letter and numbers like A1302 and C3281 the part number will be 2SA1302 and 2S3281 (these are examples) you can find parts online at many sources (I like MCM electronics). This is not a difficult receiver to work on, a bottom panel is removable. The bad pair will be shorted between at least two off the legs.

If you take it in to be repaired $70-$90 would be a fair price.

Posted on Nov 29, 2009

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1 Answer

I have a Kenwood kr-v8010 and all a suddenly one channel is only working just woundering if its a easy fix?


Could be a speaker wiring issue, defective speaker or possibly a speaker protection fuse inside the unit has blown.

1. Check speaker wires for proper connection.
2. Swap left and right speakers to see if the problem follows the speaker.
3. Check for internal speaker fuse that may have blown. PLEASE proceed with caution inside the unit. With the AC cord unplugged there are still high voltages resident inside...BE CAREFUL!!

Oct 31, 2012 | Audio & Video Receivers

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Why does t4al fuse keep blowing?


Fuses blow when there is an overload. The most common cause is a short-circuited semi-conductor device. Frequently found on the large heat sink of the power amp section of the unit. Very often this will have blown due to bad speaker wires. With the two wires touching each other more often than not. Or simply connecting the wrong type of speakers to it.

Oct 13, 2011 | Denon AVR-2309CI 7.1 Channels Receiver

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I have a Technics SA - DX750 Amp Everytime I turn it on I get an error message F70 and then it requests that I turn the power off. This is all it does now, so sound. How do I solve this issue I have...


Hi!

The F70 error certainly indicates a blown fuse inside.
The real problem is why the fuse is blown: there are only two possible reasons
1. there is a short circuit on the output (lines or speakers)
2. you have a blown output transistor (and that means some work and skills to replace).


To be sure, please change the fuse with a same rated fuse (buy more than one because it can blow again). Disconnect the speakers and turn the amp on. If the fuse blows again, it is sure something wrong with the output transistors. If the fuse remains ok, then please check all the wiring to the speakers.

Hope it helped.

Regards,

Bogdan

Aug 21, 2011 | Technics SA-DX950 Receiver

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I think i fried the power supply shorting against the chassis.. is it worth trying to fix it? touched bare speaker wire to chassis while it was on...


What leads you to think you fried the power supply in your unit? While touching the speaker wire to the chassis is never a good thing it should not have fried the power supply. Might have opened a fuse in the speaker circuit. Have you checked all the fuses yet? Try that first and get back to me and make sure the unit is unplugged before you open it up!!!

hardrocko

Feb 05, 2010 | Onkyo TX-8211 Receiver

1 Answer

Protect


Speaker wires are touching in back or the ends are touching inside try cleaning any loose copper threads off the ports and blow them out, also check to see that all the positive and negative wires are properly run and not crossed (+ to + and - to -) if that dosent work you may have blown out the outputs on the receiver, there are a series of odd voltage and amperage glass tube fuses on the inside if this happens forget it the fix costs more than a new one. if you do find the fuses as soon as you replace them they will blow out again in seconds. Notorious for this problem. been there done that.

Nov 28, 2009 | Sony STR-DE335 Receiver

1 Answer

JVC RX-318 keeps blowing fuses


could be several things, speaker wires touching,shorted output transistors, a shorted rectifier diode,bad filter caps in the power supply,those are the most common

Jan 06, 2009 | JVC RX-318 Receiver

1 Answer

Amplifier keeping blowing fuse


This almost always indicates a blown speaker. If you have an ohm meter you can use that to test the impedance on your speakers. After disconnecting the speaker - touch the red lead to one connector and the black lead to the other. If it reads something other than 8ohms that speaker is blown.
If you don't have an ohm meter you can simply disconnect one speaker at a time and run that way until the fuse blows. If the fuse never blows then you've found the suspect speaker.
Sometimes blown speaker can hide by stealth. When cold everything is normal. When things start to heat up from use the failed circuit shorts and blows the fuse on your amp.

Oct 21, 2008 | Denon DRA-375RD Receiver

1 Answer

I have a kenwood KA 1060 amp, and recently changed the fuse on the first PCB board where the mains power lead connects to the unit as the fuse had blown. After doing so and testing it again the fuse has...


Most likely the output transistors are shorted. This causes the output stage to draw too much current and blows the fuses. Expect a parts cost around $20-$40. Add in the local labor rate for the total repair cost.
Dan

Apr 17, 2008 | Audio & Video Receivers

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