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little mistake on my ms-2125

Posted: Sat May 19, 2012 2:18 pm
by unbreakabledancer777
Hi,

Today I have clean my pcb but at one time I have touch one kind of " orange gain screw" and it turn for 1 millimeter, I think it's a kind of adjustment but I'm not sure, can someone help me on this?

I want to hit my head on the wall this is stupid of my part I know it :?

this is a photo of this screw:

Image

Re: little mistake on my ms-2125

Posted: Sat May 19, 2012 5:48 pm
by trickyricky
Thats to adjust the bias. You'll have to check the emitter's voltage and adjust it according to spec.

It looks like you have two bad caps (C213 & C119) according to the pics. Or their just "sun burned" and might be perfectly fine.

Re: little mistake on my ms-2125

Posted: Sun May 20, 2012 1:12 am
by unbreakabledancer777
I think their "sun burned", the amplifier works good

Re: little mistake on my ms-2125

Posted: Tue May 22, 2012 6:33 am
by stipud
Not a good idea to touch those. If you can put it back where it was before, you should be alright, but I wouldn't risk running the amp otherwise.

Re: little mistake on my ms-2125

Posted: Tue May 22, 2012 6:42 am
by joerg
A little recommendation from someone that recapped and cleaned one or two of those: "Always mark those with nail colour or tippex before u start cleaning the amp" :wink: