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Protect on a-97 amplifier (kenwood) - Audio Players & Recorders

Posted by djevansy on

  • 3 more comments 
  • djevansy Aug 30, 2008

    how do i get the IC changed an if you could would You be able to tell me what this is

  • stuandlou Sep 25, 2008

    my amp flashes protect and then switches off after a short while does anybody have a diagram to allow me to repair this fault ???

  • mike00dj Oct 30, 2008

    i have the exact same problem... kenwood a-97 amp and when its turned on it goes into "protect" mode...

    ive read a lot of replys saying get the IC change and try different things, all of which i have done, except for change the IC

    will this be expensive or am i better off just getting a new amp/system

    thanks for your help

  • jose84 Dec 03, 2008

    'protect' on a97

  • Anonymous Mar 29, 2009

    what is the "audio amplifier IC" as i get this problem also tho i was told by the original owners they had to press somthing down for few seconds then it works?? 

    ninoninixion @hot mail. com



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The audio amplifier IC are damaged and need to be replaced.

Posted on Aug 16, 2008


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Hi I have a Kenwood HI FI System with an amp that says protect can you help,Thankyou

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My 1800 watt kenwood keeps goin into protect mode as soon as i turn it on.. why?

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What shall do if my kenwood show me protect?

Hello. It could be helpful if you would give us the exact model number of the Kenwood product you have. Kenwood has made many products over the years. While it's unlikely, your Kenwood product could be the subject of a recall or repair for this problem.

If it is not, please start out by checking your speaker wiring. If you have a short or bad connection, this can cause the amplifier in your Kenwood product to shut down as a way of protecting itself.

Check your speakers as well. Make sure all of them work. Also check the impedance printed on the back of each speaker. Compare it to the ratings printed in the Kenwood manual.

If none of this helps, and you do not find a problem, your Kenwood product may require repair. "Protect" is how the microcontroller inside the receiver is trying to tell you that something is wrong and if the unit did not shut down, further damage could result.

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Protect on a-97 amplifier (kenwood)

The 'protect' is there to protect the main circuit board.
It is normally set off by the output stage going faulty and drawing too much power. The output stage is either made up of 4 large transistors or one very large Integrated Circuit. Either or will be attached to a big bit of aluminium, might be painted black and have fins or just raw aluminium. I've never heard of any system with a protection bypass. Be a bit like having a car where you can switch the brakes off with a button!
What happens if you disconnect all the speakers and any aux outputs?
If it stays on then the problem is with what you have attached to it.

Mar 29, 2009 | Audio Players & Recorders

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My kenwood a97 hi fi amp has gone into protect mode a resistor is broken how do i get a diagram to identify the type i need

in my a-97 amplifier was the chip stk350-030 broken. I replaced it and it works again. The stk350-030 you'll find in the middle. Open the hood and cut the bottom (sound weird but its true)

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Kenwood Midi M-97/M Switch power on and after a few seconds i get a protect message appear on A-97 amplifier and it blocks use of the system. -Paul

this is prob because of a wrong connection between speakers connections + to + - to - check all speaker wires are correct with no shorting out between + & -


May 15, 2008 | Audio Players & Recorders

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