HHHHelp my For A3000DB!!!!

[bass master]

To whom it may concern ; respectfully,
I have to mention that I own an amplifier POWERACOUSTICK-A3000DB.
One day when I was working , one of the capacitor’s related to feeding source faced a problem.
Then I changed all the capacitor’s. After this event,my amplifier is not functioning well , in fact,it cann’t do well whith different frequencies.
Its ability & quality has been decreased very much.
If I get a bout 30 or 40 Volt from this amplifier, it can protect.
I tested the output with Osciloscope.The result was this: the lines were steady an soft, and above the normal position.
;But it must be like heart beats and changes continuo usly.
Of course,I have to mention that,after 4 or 5 days,when I run it,there is no problem & it acts well;but again after a few seconds it comes back to the problem.
I can say its well functioning is quite by chance.
More over my sub is MOFO-15.
Now please do a favor and if possible guide me about the points below: bassmaster.1900@yahoo.com
1-A drawing of amplifier (including the details related) & (map amplifier) & (service manual) or (repair menual)
2-Where is the cause of such problem?
What should I do?
In advance,I send the best regards and thanks.
Thanks a lot.
Awaiting your prompt reflection.

normal amp:
4shared.com - online file sharing and storage - download Ociloscop2.mp4?

my amp(problem):
4shared.com - online file sharing and storage - download Ociloscop1.mp4?

[bass master]

normal amp:
4shared.com - online file sharing and storage - download Ociloscop2.mp4

my amp(problem):
4shared.com - online file sharing and storage - download Ociloscop1.mp4

[bass master]

i need manuals for this model...can anyone tell me where I can find them?

[Dimon74]

I can give you simular schematic from Lanzar.The only differnce is,your amp have 16 power suplly fets and 10 output stage

[bass master]

I need service manual schematics poweracoustik A3000DB !
thanks

[Whortless]

Originally Posted by bass master

To whom it may concern ; respectfully,
I have to mention that I own an amplifier POWERACOUSTICK-A3000DB.
One day when I was working , one of the capacitor’s related to feeding source faced a problem.
Then I changed all the capacitor’s. After this event,my amplifier is not functioning well , in fact,it cann’t do well whith different frequencies.
Its ability & quality has been decreased very much.

Hi Bass Master,

I do not have shematics or something else of the mentioned amp. But, I can say some; I am sure you replaced the caps with same rating but, the ESR values of new caps are can be high. But, if it would so it can not work properly anytime. The other problem can be the un-clean board from solder paste residue. Therefore I suggest you to clean the board with isopropanol(named IPA) or something like this then try again. Sure, residual solder paste make some big errors on high frequency circuits. If there is no other errror your circuit should work.

Best wishes