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Kenwood kr-6600 protection circuit diode has failed, any suggestions for a replacement

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5 Suggested Answers

  • 45 Answers

SOURCE: system protect

I would suspect the protection circuit is bad (bad cap). It worked before??
Find what is driving the speaker protection relay. Replace the small electrolytic caps in that section. Small caps are used so that when the power is removed the relay releases quickly. Or DC is present on one or more of the amps before the relay.

Posted on Nov 05, 2007

  • 17 Answers

SOURCE: Kenwood Receiver KR-V127R - left channel not working

Select an input that is not connected, for example select CD with no cables going to the CD input on the backside. Will you then hear equal humming on both channels? If so, the amp stage is ok,
and the problem lies in the signal level circuitry.
Open the cover and use a plastic (insulated) stick to touch suspectible cables and components. When the sound returns, you've found the cause. Resolder or reseat the component/cable/card.
Use the insulated stick, NOT your fingers!

Posted on Jan 01, 2008

  • 3422 Answers

SOURCE: I have a Kenwood KR-V7030

HI,
The protect message means that a problem was detected and that the output speaker connections have been disabled.

Posted on Jun 29, 2008

  • 319 Answers

SOURCE: problem with playing my Kenwood KR-X1000

Unit apparently has problems. Check/replace batteries in remocom

Posted on Aug 14, 2008

  • 222 Answers

SOURCE: kenwood kr 3600 volume potentiometer is faulty

try google and it will give you some local electonic stores

Posted on Jun 08, 2010

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2 Answers

Whats is wrong when reciever kenwood kr v8010 doesn't torn on?


Power supply section circuit should be checked. Start with AC cord, Fuse, Diodes, Output components etc:
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Aug 11, 2014 | Audio Players & Recorders

1 Answer

When i turn on my kenwood kr-v990d it powers up for about 2min then shuts down


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.

Oct 23, 2011 | Kenwood KR-V990D Receiver

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

Kenwood Receiver KR-V127R - left channel not working


Select an input that is not connected, for example select CD with no cables going to the CD input on the backside. Will you then hear equal humming on both channels? If so, the amp stage is ok,
and the problem lies in the signal level circuitry.
Open the cover and use a plastic (insulated) stick to touch suspectible cables and components. When the sound returns, you've found the cause. Resolder or reseat the component/cable/card.
Use the insulated stick, NOT your fingers!

Dec 31, 2007 | Audio Players & Recorders

1 Answer

Problem with playing my Kenwood KR-X1000


Unit apparently has problems. Check/replace batteries in remocom

Nov 19, 2007 | Kenwood KR-X1000

1 Answer

System protect


I would suspect the protection circuit is bad (bad cap). It worked before??
Find what is driving the speaker protection relay. Replace the small electrolytic caps in that section. Small caps are used so that when the power is removed the relay releases quickly. Or DC is present on one or more of the amps before the relay.

Nov 02, 2007 | Audio Players & Recorders

2 Answers

Ppower on then standby problem Kenwood KR-V8060


This fault may be similar to a Harmon Kardon AVR1550 fault I recently encountered. I did all the usual checks e.g. testing for presence of DC on speaker outputs etc. but all seemed fine, then the fault cleared! Next day it re-appeared and attention was (falsely) given to the protection circuits as the amplifier circuits themselves were considered to be in order. The HK uses both voltage and current protection circuits and it was discovered that the current protection circuit was operating. Eventually the fault was found to be one of the 0.39 Ohm 3W metal oxide resistors that had gone high in value on the left hand channel. Of course your amplifiers fault may not be due to this but the reason for going into standby would probably be the same i.e. due to amplifier protection circuits operating. You need to check out all the output devices and those resistors on every channel, even surround ones you may not be using. Hope this helps.

Nov 01, 2007 | Audio Players & Recorders

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

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