Question about Kenwood KAC-7202 Car Audio Amplifier

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Red light only!!!

Recently re-installed my 7202 kenwood. everything was working fine when disconnected from my old suburban, and when i installed it in my new suburban (exactly the same way as before) i get red indicator light on the amp. the fan and the red light are the only things that work. double and triple checked to make sure everything was wired in correctly, and still no changes. why is my amp immediately going into protect mode and what can i do to remedy this? someone please help, i am DYING to make this work.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Kenwood 7202 Amp that is blowing fuses

i had the same problem ! that amp is underated!
it should have 2 / 40 amp fuses i had to direct wire the fuse!
not a smart thing to do but it never shut off again and i havent
had any problems at all i put a 60 amp fuse at battery!
melted 1 wire that was two small ! its banging 2 / 12inch solo barics and sounds great hits deep. again not smart BUT it works.

Posted on Dec 01, 2007

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  • 77 Answers

SOURCE: Kenwood KAC-7202 wont turn on

I have found the problem to my Kenwood KAC-7202. The amps fan was the only thing that would come on thats it. So I started checkin zener diodes cause all transistors checked out fine. So I remember readinf about a guy that had same problem and took it to a shop and they said it was some diodes. Well, thats what I was thinkin or the transformer. It turned out that 1 zener diode was no good, diode D9 1ss133. I took a zener out of an old vcr I use for parts and put it in and the fan came on as usual then the red light. Then I hooked my mp3 player to the rca input and hooked up some speakers and it works great. Hope this helps you other guys with the same problem. Check your zener diodes with a digital volt meter, if you get any measurement other than the reverse impedance which will read between 600 and 1200 ohms some lower or higher and then reverse the leads on your meter and if you get any reading it's no good and the reading will be 0-50 cause mine read 047 ohms.

Posted on Feb 09, 2009

ProsunPal
  • 60 Answers

SOURCE: KAC-7202 will not put out sound. Put in other amp works.

When you switch on the amp did the main amp ic produce heat. If does not change the main amp ic.

Posted on Feb 14, 2009

  • 16 Answers

SOURCE: Not powering up

is the REM wire from the unit hooked up to the amp?

Posted on Aug 20, 2009

gregs_rockin
  • 274 Answers

SOURCE: my kenwood amp 7202 shows its working but i get no sound

Your IC,S Are shot in it.

Posted on Oct 20, 2012

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KAC-7202 Major feedback after a few minutes of running.


you might try unplugging the wires from the sub, turn it back on with the wires disconnected- if the noise comes back the amp is probably bad - if the noise doesn'tcome back -turn your head unit off and reconnect the sub- if the noise comes then your sub's voice coil could be shorted- if the noise comes back you should try a different speaker to compare- if the noise still there with the test speaker your problem is definately the amp.
If these suggestions don't help please e-mail me at Merle840@aol.com i will be glad to help. Please give me a good rating if i have been able to help you M. MERLE

Oct 12, 2008 | Kenwood KAC-7202 Car Audio Amplifier

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Nope it's not a high-to-low level converter problem, it's most likely a problem with one of two things. 1) either you've blown the output stage in the amplifier, or 2) you've hooked up your subs wrong and your amp is seeing to low of an impedance. The amp is supposed to be 1ohm stable, but we had the same problem. When the indicator light goes red it means that the amp has gone into protection mode, now you have to figure out why. If something in the amp goes bad or just disconnects from the board it will cause power protection mode. If you fry something on the board because you are running the amp to hard or at the wrong impedance it will go into thermal protection mode, however there's no simple way to figure out which has happened.

Have you tried hooking up some different subs to see if the problem remains? try this. If the problem no longer happens then you know it's your subs, if it does still happen then you'll know it's an internal problem.

Years ago I had a Kenwood KAC-821; long story short, I melted the main power wire right off of the board, everytime I turned the system up the amp would shut down.

Take you amp to an authorized dealer and have them bench test it for you.

Let me know what you find out.

Jul 14, 2008 | Kenwood KAC-7202 Car Audio Amplifier

3 Answers

Kenwood KAC-7202 wont turn on


I have found the problem to my Kenwood KAC-7202. The amps fan was the only thing that would come on thats it. So I started checkin zener diodes cause all transistors checked out fine. So I remember readinf about a guy that had same problem and took it to a shop and they said it was some diodes. Well, thats what I was thinkin or the transformer. It turned out that 1 zener diode was no good, diode D9 1ss133. I took a zener out of an old vcr I use for parts and put it in and the fan came on as usual then the red light. Then I hooked my mp3 player to the rca input and hooked up some speakers and it works great. Hope this helps you other guys with the same problem. Check your zener diodes with a digital volt meter, if you get any measurement other than the reverse impedance which will read between 600 and 1200 ohms some lower or higher and then reverse the leads on your meter and if you get any reading it's no good and the reading will be 0-50 cause mine read 047 ohms.

Feb 09, 2008 | Kenwood KAC-7202 Car Audio Amplifier

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Exchange the amp it is going into Protect. But your sub may be causing this problem if it is shorted. Make sure your subs are wired to at least a 4 ohms. Only a shop can tell you for certain if your sub is shorted or not. But if you are smelling smoke then that amp is already toast.

Jun 26, 2007 | Kenwood KAC-7202 Car Audio Amplifier

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