Re: The Lisa - It Works the Way You Do from Toby Thain on 2018-04-21 (lisalist1)

From: Toby Thain <toby_at_email.domain.hidden>
Date: Sat, 21 Apr 2018 22:15:29 -0400

On 2018-04-21 9:26 PM, Ray Arachelian wrote:
> ...

>> 2. This is what happens when you move it to the right-hand side of the
>> screen: https://photos.app.goo.gl/hnTu1ZCieGDHYTs22
>>

> Oh yeah, you're right. I did notice a bit of rock and roll on my actual
> Lisas and like you thought that it must be the power supply - but I too
> recapped mine a few years ago. James helped with that. :)
>
> Perhaps it's some sort of beam reflection or deflection issue. Or maybe
> it's the alternating 50% gray pattern in the scrollbar? Or maybe the
> electro magnets that aim the electrons lose some of their accuracy at
> the right edge for some reason, possibly the gun is still turned on and
> painting the rightmost pixel when on the horizontal retrace back to the
> left happens? Maybe they needed to add a bit of extra padding on the
> sides to prevent it? Wonder if this also happens on old B&W toaster Macs?

It does not. Those displays are rock solid, there are no analog or timing issues.

Probably a slightly more modern design.

--Toby

> ...

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Received on 2018-04-21 22:24:48