Mac SE/30 pincushioning and flicker

[drlegendre .]

It's been years since I've had to do any board-level work on the compact
Macs. But in virtually every one I opened up, there was an issue with that
dang multi-pin power connector, as it leaves the analog board. In almost
all cases, there were cracked solder joints on the board-side of the
connector. Had this in Plus, SE, SE/30 and one Classic IIRC.

Carefully resoldering / reflowing them fixed the issues. It's one of those
things - if you haven't done it yet, do it just for drill - get it out of
the way. If you want to get fresh, solder-suck as much of the old as you
can, and resolder it with SN63/37 material.

That's all I've got. ;-)

On Sat, Apr 2, 2016 at 11:28 AM, Ian Finder <ian.finder at gmail.com> wrote:

> The flicker is gonna likely be aging capacitors on the analog board.
> Ideally you'd replace these.
> For the pincushion I believe there are magnets on the yoke that can be
> adjusted...
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> Sent from Outlook for iPhone
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> On Sat, Apr 2, 2016 at 2:51 AM -0700, "David Griffith" <dave at 661.org>
> wrote:
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> I recapped a Mac SE/30 a few months back and only just now put it back
> together.  After a false start with dirty contacts on the ROM simm and
> resulting irregular vertical bars, the machine is working again.  There
> are no more zipping sounds coming out of the speaker.  Two problems
> remain:
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> 1) There is slight pincushioning along the bottom of the CRT, about a
> third of the way in from the left.
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> 2) The CRT produces a rather noticable and irritating flicker.  I don't
> remember the one-piece Macs flickering like this.
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> I think a cleverly-placed magnet might fix the pincushioning and recapping
> the analogue board would remedy the flicker.  Can I get some thoughts,
> commentary, and suggestions on this?
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> --
> David Griffith
> dave at 661.org
>
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