Kicker said they don't hand out schematics anymore....
I need to repair this amp and I know that I need to replace all of the irf3205's but I'm not sure if anything else is damaged. anyone have a schematic or experience with this particular model??
I need to repair this amp and I know that I need to replace all of the irf3205's but I'm not sure if anything else is damaged. anyone have a schematic or experience with this particular model??
check out perry's site
check out perrys site on basic caraudio amplifier repair it will probably help you out. go to the homepage and scroll through the topics and it will tell you how to troubleshoot them with you meter you can click on the link above in the post he sent you it should give you a little insight of what you are getting yourself into and whether you will be happier sending it to someone to fix or doing it yourself
if all else fails use a hammer and ductape. just kidding
check out perrys site on basic caraudio amplifier repair it will probably help you out. go to the homepage and scroll through the topics and it will tell you how to troubleshoot them with you meter you can click on the link above in the post he sent you it should give you a little insight of what you are getting yourself into and whether you will be happier sending it to someone to fix or doing it yourself
if all else fails use a hammer and ductape. just kiddingHow do I determine the tolerance and size (aside from actually measuring) for the resistors, they're surface mount type 100ohm (marked 101).
If they only have 3 digits, they are 5% tolerance.
The power supply gate resistors in the ZX750.1 are 1206s.
The power supply gate resistors in the ZX750.1 are 1206s.
great, you've been very helpful...hopefully I wont have any other questions. I'll update this thread as necessary.
I read in another thread where you stated that you can't use the 3205s with the 100 ohm gate resistors. Did I misunderstand your context? They are all 100 ohms in this 750.1 and they are original parts.
In most cases, there is insufficient deadtime to safely allow the use of 100 ohm gate resistors and 3205s. If this amp used the 100 ohm resistors and the 3205s originally, it likely has additional deadtime built into the circuit. This may also have been marginally safe in the kicker amps. If I remember correctly, in all of the kicker amps that I've seen that used the 3205s, there were 47 ohm resistors. They may have tried using the 3205s initially with the 100 ohm resistors and then reduced the value due to reliability issues.
Qo5 and Q11 seem fine... they don't read shorted or open. But I wanted to find out what they are and I can't find any info on them, they are marked as6 . I think they are kec but I don't know. Any help would be great, thanks again.
Great, thanks Perry, I saw in another post that you recommend replacing those with a mmbta56. Is there any unusual method for testing these, like I said, they didn't measure shorted or open and visually they look perfect.
They're a standard PNP transistor so testing is straighforward.
I use MMBTA56s as replacements but you don't need to replace them if they're not damaged.
I use MMBTA56s as replacements but you don't need to replace them if they're not damaged.
there is a small (roughly 1/4" x 1/4" or a little less) metal, square two legged component on the same rail as the irf 3205's that I was curious about. It looks like it may have a resistor symbol below it on the board (can't really tell through the soot). I can't find any part info on it, do you know what this is and how I can identify it. since its right next to all the burnt 3205's I thought it may have suffered some damage as well.
It sounds like a thermistor. Unless the legs are broken, it's likely OK. They rarely fail.
You need to clean the soot off of the board. Acetone works very well. Use cotton swabs or a toothbrush that's not made of transparent plastic (they melt). Do it outside where there's plenty of ventilation.
You need to clean the soot off of the board. Acetone works very well. Use cotton swabs or a toothbrush that's not made of transparent plastic (they melt). Do it outside where there's plenty of ventilation.
Thats what I thought I just wasn't sure if I should be concerned with it , I was waiting to clean the board until I get the damaged components out which hopefully will be very soon. thanks again
I use about a 1" paint brush if it blew soot under other things and made a big mess, the brush will get around and in most things. I pour a little acetone on the brush and keep the board tilted up, works great for larger messes. Yes I do that outside only. Usually I can get it clean without pulling any parts, though I often take the bad transistors out first. If you are careful applying just enough to the brush you don't have much runoff. Also shows if there is any other damage or burnt board/parts you could not see in the mess, so I like to do that right away.
Also have a larger paint brush I use dry for dust and bugs, etc.
Also have a larger paint brush I use dry for dust and bugs, etc.
Kicker schematics
There are some Kicker schematics in the automotive section at www.schematicsforfree.mattsoft.net
There are some Kicker schematics in the automotive section at www.schematicsforfree.mattsoft.net
Hello Perry, this thread is a bit old but I am hoping you are still active on this forum,
I have a kicker zx750.1 on my bench now, all the FETs on one side were blown,
beyond even needing a meter to identify their problem, I replaced all of them and didnt find any other parts shorted or outside of their normal characteristics, except for Q 05 & 11. both are open completely, one has a hole blown in it which leaves only the last two numbers, I am pretty sure they are the same "ASG49". My problem is even after scouring the net and all my favorite sites that usually cough up in short order every necessary detail, I can find no info whatsoever on this part number. I tried a56 in place of ASG and several variation in case I am not seeing them correctly, but nothing brings up any info at all!
There is another unit on the board, but its surface mount and I dont have the tools to remove it in a fashion it is likely to be reusable to test the amount of gain. Since pretty much the best tool I have for this is a pair of pliers heated with a torch to remove them.
You wouldnt happen to know the specs on this transistor or a equivalent part number?
Also this unit also has 100 ohm gate resistors, non of them are damaged,
in further observation since your last post in this forum, have you confirmed these should be changed to 47 ohms? (my natural tendency is to think the FETs are getting plenty signal already since they clearly experienced an over load condition)
One thing I found odd is despite all these parts being in short condition, it didnt blow the fuses, apparently 80amps is too high a fuse value, or perhaps their supply was unable to provide that much current.
Thank you very much for any info you can provide.
Troy