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EDP noise help (unsoldering) 2nd try



many thanks to those who have tried surgestions...

ive tried all the ideas and am  sure the noise is definatly edp internals 
related not the ambient conditions/ uk  voltage etc. i need advice from 
anyone who has ever had to take off those damn heat/static covers on the 
blackface unit  that now cover the two main chips that you could get to on 
my beigeface  unit.
any tips of unsoldering, or should i try prising them off or maybe cutting 
them off??
any final words of wisdom

cheers all

Phill



>From: "phill wilson" <blackface@hotmail.co.uk>
>Reply-To: Loopers-Delight@loopers-delight.com
>To: Loopers-Delight@loopers-delight.com
>Subject: EDP noise help (unsoldering)
>Date: Tue, 27 Mar 2007 01:28:04 +0000
>
>Hi all
>
>right, ive gone and been a silly chimp,
>I bought a second edp l( blackfaced echoplex)last month, but have been so 
>so busy ive only just got to the pluggin in stage and.............. 
>aaaarh 
>noise!!!
>hummming noisey noise....
>the humming actually starts as soon as the mains cord is plugged in and 
>is 
>raised to crazy levels as soon as i power on.
>the screen displays correctly  and all seems in order under the hood,and 
>ive tried all the normal fixes. ive got another white face echoplex and 
>have had a noise problem before, and last time i reseated the rams, roms 
>and the lil square chips and that solved it.........went to do that this 
>time and HORROR!!!!!! someones gone and put metal covers over the square 
>chips......so questions
>1.Any idead on the noise cause?
>2. If its what i think it is how do i get those damn covers off?
>3. Why cover the chips?
>
>thanks for any and all input on this, i knowwe go round in circles on 
>this 
>subject and i thought i was ok solving my own probs, bt this has me 
>really 
>bummed out , ve not een used it yet
>
>Phill Wilson
>
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