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Kenwood protection function

I have a KAC-8102D amplifier. I set off the protection Function on it and now i can not get it to work, the fuses are all fine, and i tried disconnecting and reconnecting everything with no luck. Is there somthing i need to do inside the amplifier. They need to make a little reset button that you press when the function kicks in :S. any help or suggestions?

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  • Anonymous Sep 27, 2008

    same exact problem on my kenwood KAC 7204 amp...i agree with u 100% about the reset button

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5 Suggested Answers

  • 2 Answers

SOURCE: Middle Button does not work

mine dont work either....................julie

Posted on Mar 16, 2008

SOURCE: VB101PK REV 13, AMP WITH SUBWOOFERS

you may have to much speaker for the amp or one of ur wires could be crossed

Posted on Mar 17, 2008

robotek
  • 1512 Answers

SOURCE: Kenwood Amp blinking Standby indicator light

Hi fuxsiloh.

It sounds like you have eliminated all the things that could generate this symptom that are external to the amp. It is most likely that there is an internal problem that is causing the amp to go to protection mode. A power supply failure(maybe a fuse) is the only really user serviceable part inside the amp. Perhaps check for failed fuses, replacing any that may have blown with exactly the same type. BE SURE TO UNPLUG AT THE WALL FIRST:)

Is the amp still under warranty? If so, then returning it to a Kenwood service center is the shot. If you want to have a go at repairing it, I can talk you through it, but some experience with this sort of thing is very necessary. Good luck

regards
Graeme

Posted on Apr 06, 2008

robotek
  • 1512 Answers

SOURCE: kenwood vr5700 standby blinking light

Hi kerrijon

Oh dear, your budding lil electrician may have gotten out of his depth:).

Shorted speaker wires often result in damage to the amps output stages. The blinking light tells us that the unit has gone into protection mode, preventing damage to the speakers from the amp. It will have what is termed a DC offset condition being generated by the channel; that got shorted. There is no easy fix for this and you have checked the obvious with fuses and removing all speaker wires and checking operation. The unit will have a blown output transistor/array, possibly driver transistors, and fusible resistors, and diodes to that channel. The bias current will also need to be set up again once repairs are completed.

There are no user serviceable parts in a unit like this. With good knowledge of electronics, a multi meter, soldering iron and experience at using all, you could fault find the channel, replace the parts yourself. I should warn you that if descrete components are used, they can be difficult to repair because of the nature of DC coupled linear stages employed. The best option is to take it to a repair man for a quote.

I am happy to try and talk someone through a repair process, but there is a degree of difficulty ascociated with not being able actually work on the amp.

The best solution for you is to get a tech to look at it. This sort of repair work can range from $80-150 depending on the parts used and the time taken to fault find and replace parts. I hope that this helps you. Your appreciation for my time spent to give you this advice is best rewarded with a FixYa.

Cheers

regards
robotek

Posted on Sep 10, 2008

thadrizzle
  • 22 Answers

SOURCE: What is the watts of

It's a 2 channel 75 X 75RMS made in 1988. I repaired the circuit board but I cannot find a a power cable (kenwood part# E-30-2302-05). If anyone has a schematic or a din pin out for that I would love to see it or here from you.

Posted on Sep 22, 2008

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