Question about Kenwood KAC-628 Car Audio Amplifier

1 Answer

Kenwood kac 628 red light comes on and no audio output

Red light comes on and no audio output can put a good working amp in my truck and good amp works

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 185 Answers

The red light you describe on your amp, is the protection mode warning light. An amp goes into protect for many reasons. Here's a checklist.

1st check the fuse (s) on your amp and make sure they are not blown.

2nd check the inline fuse next to your car battery (if you have an inline fuse)

3rd, disconnect the speaker wires with amp on, does the light go off?

4th check your ground, this may be ok if you have tried another amp with the same wires.

5th.if none of these turns the protect mode off, it may be an internal fault.

you may have blown transistors and it is a tricky job to repair and costly.

Posted on Jan 30, 2013

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

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.

Posted on Aug 21, 2007

guly
  • 67 Answers

SOURCE: Amp not powering up correctly.

check transistor of the unit 1 or 2 tans. bad use a tester. the unit is overload protected. replace the deffecteve parts

Posted on Sep 19, 2007

  • 1 Answer

SOURCE: KAC-X520 kenwood 1000w amp

try wiggling componites and look for cold solder.

Posted on Jan 17, 2009

  • 5 Answers

SOURCE: Kenwood KAC-8103D Power Amplifier wont turn on

it sounds to me like its burnt.but with some amps the screws that hold it in place have to be screwed into the car chassisfor grounding. be careful not to srewe into hidden wires.

Posted on Apr 15, 2009

housejess
  • 317 Answers

SOURCE: amp lights up, but no power to outputs.

channels mey be burned....does the amp smell like burnt electronics

Posted on Nov 07, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Red light on on amp


take speaker wires off amp if the lit is green then speaker are hooked up wrong or blown.

Mar 29, 2014 | Pioneer GM-5200T Car Audio Amplifier

1 Answer

XBOX 360 composite output works fine. Component


You say the component video is no good? Well this usually happens when it is wired up incorrectly, Ensure you have the right colors in the right jacks at each end, it is real easy to get mixed up... make sure Red goes to Red, Blue to Blue and Green to green, all alongside each other, NO ALSO using Component you MUST also run 2 more cables for the Audio, they are Red & White NOT the Red from the "Other" Video input, BUT the AV Red & White jacks, beside each other on the units. So all in all there are 5 cables taking the Video, 3 R, G, B. + The Audio, R & W.

Mar 02, 2010 | Microsoft Xbox 360 Console

1 Answer

CRATE PA-B6350 no output


The 2 speaker jacks are wired in parallel. If your subs are 4 ohm rated the amp is seeing a 2 ohm load and may be trying to protect itself - hence the red light. I would suggest you unplug 1 of the subs and see if the problem goes away. You may have a problem with one of your subs. This amp is probably not the best choice for such demanding work as it is not fan cooled. Good luck.

Feb 21, 2009 | Onkyo TX-NR905 Receiver

2 Answers

Wont work


I have the same amp I just bought off e-bay not working. It's what I do. I buy amps that don't work then repair them and resale. Anyway mine did the same thing and your problem is shorted output transistors. Find which ones and replace. But, since this is a 1 channel amp you will want to replace all the output transistors. Make sure the replacements are from same manufactuer, same date code/ batch number. It's better to have transistors that are from the same batch cause mixed transistors can have little variations that might cause problems later on. Good luck and let me know. I will help you if you need more help.

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

Feb 04, 2009 | Bazooka EL1500 Car Audio Amplifier

1 Answer

Trouble shooting XM-1652Z Amp


Grab yourself a test light and make sure that not only the 12v red power wire is putting out power but the thin blue or 12 volt turn on wire is also showing power. Then test the ground terminal and make sure u have a good ground. If that doesnt work try checking the amps fuses and check the fuse and connection on the battery. If everything checks out ok and the problem persists then put a small test speaker to the channel outputs and make sure that u are getting noise from those channels if you dont get any noise then u most likely have bad outputs and blown channels, you will need a new amp. Good luck, hope i was good help.

Jan 26, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

2 Answers

Input/output cables


holy confusing....might want to restate that question...ther is no power per se on the output/input....I suppose signal is DC voltage but I don't think thats what you meant. Remote wire has minimal power it is designed to turn the amp on and off with the ignition...check the main power cables red and black usually. Be careful..it can scare ya good....lol Good luck...

Aug 27, 2007 | Pioneer DEH-P680MP CD Player

1 Answer

Amp not putting out sound


This is not a problem that a normal comsumer should try to repair themselves. It's time to take it to a pro. It sounds like you have blown out at least one of your output channels. If you are getting any red light at all then the good news is that the power supply section of the amp is probably still good. About half of all the electronics in your amp is for the power supply section. The other half is for the actual amplifiers of the amp. Good luck, I hope it's not too bad.

Jun 14, 2007 | Alphasonik PMZ12005A Car Audio Amplifier

1 Answer

Pyramid PB681X


You didn't say how long it ran before it quite and I assume the red light you are refering to is the protection circuit engaged light and not the power on light. But from the info you did provide, I'd say that it sounds like you may have blown some of the main output transistors/MOSFET's. If so, it's time for a trip to the repair shop. Sorry, for the bad news. If just turning your car on caused the outputs to fry, then I wouldn't be surprised to find that you have either bridged the speakers wrong or by some means you have put the wrong speaker load on the outputs. Ask someone who knows what they are doing, if you have your speaker loading correct. This person might not be a car stereo installer as sometimes they don't know how to load an amp correctly, especilly when it comes to bridging. Good luck.

Dec 30, 2006 | Pyramid PB681X Car Audio Amplifier

Not finding what you are looking for?
Car Audio & Video Logo

409 people viewed this question

Ask a Question

Usually answered in minutes!

Top Kenwood Car Audio & Video Experts

xxxxxx xxx

Level 3 Expert

5013 Answers

Marvin
Marvin

Level 3 Expert

84619 Answers

Mike Duncan
Mike Duncan

Level 2 Expert

219 Answers

Are you a Kenwood Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...