RE: VIC-II Sync & Luma signal

I pulled the 7709 intact. I don't have enough faith in my diagnosis
skills to clip the pins to remove DIL ic's just in case I get it wrong.
I'll put the original back in the socket and see if I still have the
healing aura about me. :-)


-----Original Message-----
From: owner-cbm-hackers@musoftware.de
[mailto:owner-cbm-hackers@musoftware.de] On Behalf Of Gerrit Heitsch
Sent: Montag, 4. Februar 2013 16:47
To: cbm-hackers@musoftware.de
Subject: Re: VIC-II Sync & Luma signal

On 02/03/2013 10:58 PM, Rob Clarke wrote:

> Well, after replacing the modulator, the machine runs again but after
a
> few minutes the characters started breaking up. I suspected the
74ls258,
> which was in fact a MOS 7709, which I hadn't spotted before. Spookily,
> it corrects itself if I bring my finger within a cm or so of the chip.
> Take my finger away, characters break up again. Replaced it and voila
-
> 100%!

Ok, I never had that kind of failure before. You should have left it in 
place and show others how you can fix a Computer by just getting near
it. ;)

  Gerrit



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