u-Diemnsion proX 2k1d problem

[miqra]

Hello everyone, I appeal to you with my problem with u-dimension prox 2k1d.

1. I bought it used, right after it came to me I installed it to second u-dimension proX 2k1d in link, the problem is, the sound was sometimes without problem but for 90% of time it was with distortion and the woofers randomly vibrated like on 5-2hz etc.. after I unliknked the amps, the bought one amplifier was doing it. I sent it back to man who sell it to me. After a time he wrote me that in the D1820_V51 board is problem but he cant find where is the board to buy. So now I have it back and dont know what to do with it. BTW: the amp i bought was rev1 and the amp i had was rev2: http://www.u-dimension.pl/gfx/katalog/43prox2kv2-4.jpg

2. I searched on this forum for the board, Hifonics XX hercules and SPL dynamics EXT-2000D ( http://amp-performance.de/images/big/dscf0030_80.jpg ) have the same board, any idea where to buy it or should i buy only the
"Perry Babin: Us is likely a TL072. U3 is likely an LM211."

PS: sorry for my bad english

Thank you for your help

 

[Perry Babin]

Those boards have a high failure rate for the 470 ohm resistors and the small pre-driver transistors. The solder connections on all of the transistors on both ends of the board have a high failure rate as well.

Do you have an oscilloscope?

 

[miqra]

Thanks for response, I dont own an oscilloscope. So I can only try to replace parts that you mentioned.

 

[miqra]

BTW: have you schematics for the board?

 

[Perry Babin]

I don't have one for the driver board.

 

[rrae]

Simple question, dont want to start topic because its finished and only missing capacitor.

Amplifier with the same clone baord. Its missing two axial capacitors which are connected between output plus and minus terminals.
Are their value is critical?