Question about Audio & Video Receivers

1 Answer

Lil help i have a kenwood kr-a4080. when i frist got it start to heat up really hot on the one side cloest to the dials (on the top) so i put a cooling fan on it to keep it cool that worked for a bit then one day it just wouldn't stay on. push the power button u here a click screen come on then click goes on flashing stand by. so i open it up n obereved two resitors blackend (r161, r163, 230 ohm each) and black areas on the board in Q23 and Q25. Replaced resistors with 270ohms and turn it on did same thing as before but it did turn on for sec then both resistors blew n went back to the way it was before, does ne one know whats wrong with it and how to fix it ?????

Posted by on

  • trevor mitchell Mar 27, 2008

    it was just used for audio from the digital box cause the speaker in the tv don't work so we never cranked it or nething like that, never had a problem audio wise i have custom 5 way speakers,

    driver circuit where are they located on the board n how do i test to see if they blown ???

  • trevor mitchell Mar 27, 2008

    is there a way i can do it my self, i just need to know what parts i need to fix, if u need to see the area i can take a snap shot, i got lost of parts i can use and i good with a soldering iron

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 4,234 Answers

I would guess that the speaker(s) on that side have a problem and have caused the amp to work too hard. That resulted in that channel failing. The resistors are probably feeder resistors and are smoking because too much current is being drawn. The output transistors on that side are shorted and need to be replaced. It is possible that the driver circuit also has failed. This unit needs service. If a unit really heats up under normal conditions (relatively low volume levels), there is a problem that requires service.
Dan

Posted on Mar 26, 2008

  • ABRsvcs Mar 27, 2008

    Without seeing this on a bench, I can only speculate about the possible problem areas. It is possible that the "front end" of the system is passing some DC voltage to the amp section. A little of this won't be a problem, but too much can be hazardous. Also,. there could be defective parts that are causing some oscillation at high frequencies (too high to hear) and that will put a significant load on the amp without harming the speakers. (The speaker internal crossover will shunt these to ground.) This repair should be fairly straightforward for a service shop. Expect a cost of $20-$50 for parts plus the local labor rate.

    Dan

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Kenwood kr-720 service manual


Hi Vanpost941,
You can download the manual in pdf by clicking here. or here.

Hope this helps.Thanks!
Please rate this answer.

Nov 24, 2011 | Audio & Video Receivers

2 Answers

Can the Kenwood KR-4600 connect to an ipod?


Hi,yes you can connect Kenwood KR-4600 to an ipod.


Instruction..

You will need an coolken_9.jpgRCA cable .


Connect the RCA (red and black to the input of the Kenwood KR-4600...You have options of inputs to use..

Either input at the back of the Kenwood KR-4600,or tape A and tape B..which ever you wan to use..

After connecting the red and black RCA to Kenwood KR-4600, then connect the other jack end to the ipod, and go the front of the Kenwood KR-4600 to activate the input selection knob to the desired input being selected at the back of the Kenwood KR-4600..

And don't forget to turn on the volume of the Kenwood KR-4600 and also the iPod volume..

And after that your done..

Good luck to you..

Aug 10, 2011 | Kenwood Audio & Video Receivers

1 Answer

Kenwood kr-v888d after "ON", through 3sec.


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.

May 18, 2011 | Kenwood KR-V5580

1 Answer

I have a Kenwood KR - V6080 receiver. I need to look at a manual.


The manual is available at retrevo: http://www.retrevo.com/support/Kenwood-KR-V6080-Receivers-manual/id/479bh942/t/2/ . You will need to enter a code to download the PDF.

I hope this helps.

Cindy Wells

Apr 30, 2011 | Kenwood Audio & Video Receivers

1 Answer

My problem is i not can connect the speaker


Refer to the manual(s). Your unnamed speaker(s) may have special requirements (or not). Either way, the manuals are very helpful and a good place to start.

Register and download the manual for free at retrevo.com


http://www.retrevo.com/support/Kenwood-KR-X1000-Receivers-manual/id/479dj792/t/2/

Mar 24, 2011 | Kenwood KR-X1000

2 Answers

My kenwood amplifier suddenly off when i turn the volume high?


You need to make sure you ohms are correct if there too low this will happen to protect the amp.

Dec 03, 2008 | Kenwood KR-V7080 Receiver

1 Answer

Have a kenwood KR-V990D and can't seem to bring the volume up


kenwood has always showed negative numbers 00 is as high as it will go

Jan 06, 2008 | Kenwood KR-V990D Receiver

1 Answer

Problem with playing my Kenwood KR-X1000


Unit apparently has problems. Check/replace batteries in remocom

Nov 19, 2007 | Kenwood KR-X1000

2 Answers

KR-X1000 Power Problems


Sorry, no freebies from what I see online. But, when you power up, does it play before it shuts down? This will help me formulate a better answer for you...accordianman

Oct 25, 2007 | Kenwood KR-X1000

Not finding what you are looking for?
Audio & Video Receivers Logo

Related Topics:

57 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio & Video Receivers Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68352 Answers

yadayada
yadayada

Level 3 Expert

61168 Answers

Are you an Audio and Video Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...