Kenwood KAC-7202 Car Audio Amplifier Logo

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Anonymous Posted on Oct 07, 2013

I have a kenwood kac-7202 amp, the amp was working great until today, the problem is that the powet light is flickering on and off rapidly until it blows a fuse. the ground is secure, same one ive been using forever. it happened after i had to remove the speakers to repair the box, i already have removed the speakers to check the connections amd they are good, thinking it might be something internal on the amp please help

5 Related Answers

Duncan

Mike Duncan

  • 219 Answers
  • Posted on Apr 02, 2007

SOURCE: amp won't turn on don't know if amp is fried

Very possible that you have a blown power supply in the amp. If you are running a mono amp then there is a very good chance that you have loaded your amp with too low of a speaker impedence and fried the power supply and maybe the output section of the audio area. Hope this helps.

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A

Anonymous

  • Posted on Aug 21, 2007

SOURCE: kenwood kac 859 amp

The amp will reset every time it's turned off. The red light flashing, instead of staying constant is a warning that one of the protection circuits are activated. If the amp is bridged wrong, it can do this. If the load impedance is too low, it can also do this... don't trust the speaker, it it says 4-ohm, it may actually be 3.8-ohm, which could cause a problem if two speakers are wired in parallel. If it's not getting enough power, it will turn off briefly, but will turn back on after a second. A capacitor is not necessary with this, just use 4 gauge cable and have a good battery... make sure the ground is good, that one is commonly ignored.

Anonymous

  • 2 Answers
  • Posted on Dec 01, 2007

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.

A

Anonymous

  • Posted on May 15, 2008

SOURCE: Kenwood KAC-8103D 1000 watt issues

Apparently it won't let me log in. Anyhow... I'm pushing voltage. The light is flashing, not flickering. How can I replace the transistors?

skinnman33

Mark Skinner

  • 79 Answers
  • Posted on Feb 09, 2009

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.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/mark_b53a7494531bf96d

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Check the zener diodes over by the fuses, where the 2 chokes or load coils are. TThere are 3 or 4 Of the diodes, they are zener diodes. I had the same problem and found it to be one bad zener diode. Check my solution out on the 7202, same thing.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/mark_b53a7494531bf96d

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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.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/mark_b53a7494531bf96d

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150/ch into 4 ohms
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Spec Sheet
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Kenwood 7202 Amp that is blowing fuses

If your speakers are wired for an impedance below 4 ohms mono or 2 ohms stereo, that would make it shut off. If you have a speaker wire shorted to ground, it would also cause the amp to go into protection.

 

If the speakers are not the problem, it may be shutting down because the voltage at the amp is dropping too low.

 

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