Re: Lisa 2 Repair

On the subject of keyboard pads, a member of our New Zealand VCF recently made his own. I know the method is already somewhere on the web but he wrote it up quite well.
http://www.classic-computers.org.nz/forums/viewtopic.php?f=11&t=1241

Tez

On Tue, Dec 24, 2013 at 7:06 AM, James MacPhail <gg__at_email.domain.hidden>wrote:

>
> There are a few potentiometers at the top of the video board. It is common
> for these to develop poor contact and cause the video to jitter, roll, etc.
> The sideways jitter is probably related to the "width" or "hor phase" pot.
>
> Often it is enough to move the problem potentiometer slightly to obtain a
> good display. Otherwise, replace the potentiometer(s).
>
> Beware of the high voltage and implosion risk hazards of working around
> the CRT.
>
>
> Also, my lisa sometimes has a flickering screen (like it looks like it's
>> jittery off to the sides, if that makes sense). I was told this is fixed by
>> a vertical hold adjustment; is that correct?
>>
>
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