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

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  • 2 Answers

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Posted on Jan 02, 2017

  • 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

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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1 Answer

What is the main function of a reverse polarity diode, what would happen if it was blown

a diode in reverse polarity could be used e.g. for protecting some circuit against improper polarity of supply. It could be connected in serial - but it is in forward polarity - (disadvantage: voltage drop) or in parallel - reverse polarity - with a fuse in serial to supply. This way is often used with Zener diode - protection against overvoltage in addition. Try to google e.g. "how to protect against improper polarity". For this type of protection could be used special types od diodes - transils - they could be one- or bidirectional. In case of a diode failure, the supplied circuit may not work - it depends on the way of diode connection and type of its failure - short circuit or disconnection. But there is many diode application: try

Apr 24, 2017 | Radio Communications

1 Answer

Whirlpool microwave keeps opening high voltage diode

If you do not have any experience in the repair of microwave ovens do not engage in their repairs because it is one of the most dangerous household appliances and the consequences can be disastrous. According to your description, low voltage circuit (220V or 110V) works well (light, turntable...). Obviously the problem is in a high voltage (HV) circuit which is made up of the magnetron, HV diode (rectifier), HV capacitor and HV fuse or protect diode. Failure is in any of these components in "HV circuit" or sometimes in interlock switch assembly or PC Board.

First, you must be sure which diode is blowed, reactifier or protect diode.

To check magnetron following this procedure:

Discconect the mains supply.
Check that the capacitor is discharged (by resistor 100 ohm / 10W or more).
Discconect the magnetron.
Measure the resistence between the disconnected terminals (should be app. 0.5 ohm).
Measure the resistance between the supply terminals (both) and earth. The resistance should be infinite.



Mar 12, 2015 | Whirlpool MT4155SPS

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.

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 microwave is about 5 yrs old and today it is not cooking anything. It runs, but does not cook. Any suggestions?

Put a quart of watwer in the oven, measure the temp. run it for 4 min and you should get at least 86 degrees differance in temp. If not then the magnatron has failed and needs replaced, or for the money a newer unit is a better deal.

Mar 20, 2011 | GE Microwave Ovens

1 Answer

I have a Pioneer SX1250 receiver it works , but the protect circuit relay kicks off and then back on after a few seconds . I haven't noticed any noises in the audio when it is on and there are no over...

Cool Receiver! I have worked on many of them. Your regulator circuit will need a few zener diodes and possible some caps. It's amazing how good the capacitors are in these though, but the zener diodes fail all the time. I like replacing them all. Larry's Electronics

Apr 22, 2010 | Audio Players & Recorders

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

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