Re: EDP noise help (unsoldering) 2nd try

["Nic Roozeboom" <nicroozeboom@gmail.com>]

Sorry if I'm treading old ground - I usually skip EDP threads, but:

>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.

that rather smells of plain old trusty ground loop to me. Have you ruled that out? Running the unit stand-alone / away from rack should help determine that.

Good luck,
Nic

On 3/30/07, phill wilson <blackface@hotmail.co.uk> wrote:

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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