Need some help on selecting a good cleaning substance for a PCB?

[Paul Schreiber]

Curses to Dr. David Luce for using that crap!!! Really makes my design look bad.

1) For all your cleaning needs: www.caig.com

2) The CA3046s are brobably bad: but they are in sockets (the tempco resistor is UNDER the chip) and
replacements are $2 from Mouser.

Paul Schreiber
King of the MG-1 (but I didn't pick that damn foam)


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From: 	mymoog at ix.netcom.com[SMTP:mymoog at ix.netcom.com]
Sent: 	Monday, February 16, 1998 10:41 PM
To: 	analogue at hyperreal.org; synth-diy at mailhost.bpa.nl
Subject: 	Need some help on selecting a good cleaning substance for a PCB?

I have a moog MG-1 PCB which with a little care may be workable agian. The
current problem is that I need to clean the board up some as the foam
padding used to insulate the controls has rotted into a black crust. Is
there a safe chemical I can use that will help to clean the board without
harming the pot's and switches?

I have a working MG-1 so I can use that as a guide when rebuilding this
one. I fear I am going to need to hack in a 50K filter emph pot however as
no one seems to have them anymore (Slide Type) and the PCB is missing it.

On a side note the working MG-1 acts funny in the OSc tunning sometimes. My
first reaction would be to check the power supply for faults? I would
suspect the MG-1 might be dependent on clean balanced power? Has anyone had
this problem? I was thinking that replacing the Electrolytic Caps and
voltage regulators in the PS might help? Any suggestions on testing the
unit for faults would be appreciated.

David Lee