Calling all Chicago-ans!!! Blown Amp Help!

[snb778 5,000+ posts]

ill fix for that rd //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

no way.. RD didnt blow

I sent you a PM and posted a pic outlineing the modules I told you about in the other PM's...
Looks like blown power supply... Last one I worked on like that (MX3000.1, MX5000.1 essentially the same amp, different power supply FETS, I have worked on both) had blown outputs too... though they didn't smoke, were just bad, was what caused the power supply to go bad was when some of the outputs went bad... May need a whole rebuild if the modules are still good you will be in luck.

you said in the PM that you posted a pic, and you said in the thread that you sent a PM with the pic... but theres no pic, hahah!

 

[dB-r 10+ year member]

Look for the post you linked me to in the PM... the MX3000.1 Guts thread you posted back in October I guess, that's the one you sent me in the link, I posted the pic there.... just scroll down a little it's on this page...

 

[dB-r 10+ year member]

 

[snb778 5,000+ posts]

yea im pretty sure those are good... at least they appear fine

 

[snb778 5,000+ posts]

you saw the other pics I posted on here though right, and saw what was burnt

 

[snb778 5,000+ posts]

grinder, what do you think?

 

[dB-r 10+ year member]

Usually when outputs fail they don't smoke, they just become a dead short and causes the power supply to "overload" because it is now running massive amounts of current into a dead short. You could just need a power supply rebuild, but power supplies in these larger amps usually fail for some other reason than something being "bad" in the power supply itself, not all that likely, outputs run at high voltage and the output FETs have a much lower current rating than the power supply FETs.

Could also be a transformer winding short or one of those modules could have gone bad, but usually that throws the amp into protect, however if an output went bad, the modules might just keep on doing their thing, not triggering the protect circuit and then "poof" there goes your power supply...

 

[snb778 5,000+ posts]

Usually when outputs fail they don't smoke, they just become a dead short and causes the power supply to "overload" because it is now running massive amounts of current into a dead short. You could just need a power supply rebuild, but power supplies in these larger amps usually fail for some other reason than something being "bad" in the power supply itself, not all that likely, outputs run at high voltage and the output FETs have a much lower current rating than the power supply FETs.
Could also be a transformer winding short or one of those modules could have gone bad, but usually that throws the amp into protect, however if an output went bad, the modules might just keep on doing their thing, not triggering the protect circuit and then "poof" there goes your power supply...

ok... but what about all those black things on the side... are all of those repairable? or is it worth it.... cause about 5 of them are pretty burnt, as you can see in the pics...

Edit: you can't see em in the pics you copied... I didnt take the guards off yet in those

 

[brtnboarder3241 5,000+ posts]

no way.. RD didnt blow

i understand i was joking that id fix the amp for the rd..

 

[dB-r 10+ year member]

ok... but what about all those black things on the side... are all of those repairable? or is it worth it.... cause about 5 of them are pretty burnt, as you can see in the pics...
Edit: you can't see em in the pics you copied... I didnt take the guards off yet in those

Yes. Parts = Cheap as hell, less than $1.00 each my cost because I buy by the hundred. Labor + experience in troubleshooting = what is gonna cost you. It's not just a matter of replacing the burned up parts, I could probably dig up 10 threads on here where people tried to replace just the burned parts only to have the amp blow up again on them the first time....

The little black magnet looking thingys are mosfets.... Yes they will all need to be replaced, only way to do it "right".

 

[snb778 5,000+ posts]

i understand i was joking that id fix the amp for the rd..

ok, cause initially i stated it was blown.. so if that were the case, i'd say you have a deal

 

[snb778 5,000+ posts]

Yes. Parts = Cheap as hell, less than $1.00 each my cost because I buy by the hundred. Labor + experience in troubleshooting = what is gonna cost you. It's not just a matter of replacing the burned up parts, I could probably dig up 10 threads on here where people tried to replace just the burned parts only to have the amp blow up again on them the first time....
The little black magnet looking thingys are mosfets.... Yes they will all need to be replaced, only way to do it "right".

ok cool, i just wanted to make sure you saw em....

 

[brtnboarder3241 5,000+ posts]

i personally dont fix them myself (my dad does)

As i have heard Db-r does great work but when i asked a simple question he laughed in my face told me basically not to touch the amp and to send it in and was going to charge 125+shipping both ways on a problem i fixed for less than 16$ myself..

^^^^^

just my experience

 

[dB-r 10+ year member]

Like you said, that was "just your experience"... if it were that simple all the time noone would need an amp repair shop ever, could just do it themselves... Your welcome to try, I'll even help you, but definately don't recommend it...