[NTLK] MAX1771 replacement part

Christian Burk omahane at gmail.com
Mon Oct 16 03:43:10 PDT 2023

Hi, Frank,
These are some great shots. Thank you, too, for the advice. I just picked
up a Dremel and flux paste to make it easier. Having looked at the board
for a while, it appears that the MAX1771 component is under the ROM board.

I have highlighted the component I believe needs to be replaced from a
zoomed image captured from yours:

Does that look right to you?


On Fri, Oct 13, 2023 at 4:15 PM NewtonTalk <newtontalk at pda-soft.de> wrote:

> > My concern is that I don't want to cannibalize the MAX1771 replacement
> part from my working Newton 2000
> > to put into my Newton 2100 which is doing the start-up chime shuffle.
> Does
> anyone have a parts board with
> > a spare piece that I could use?
> As others on the list have already pointed out, this item is still
> available
> out there and it isn't even very expensive. I have never bought one,
> though,
> because I have more than enough organ donor boards. If you can't or don't
> want to get a new one, shoot me a mail off-list. We'll certainly manage to
> work something out.
> Be aware that this part is not only used on Newton 2x00 mainboards. It's
> also in the eMate and I think in at least some 1x0 models.
> I've just rigged up a zip file containing high resolution scans of
> OMP/MP100, MP120, MP130, MP2x00 and eMate mainboards. They should allow you
> figure out where these components live in the different models. As of half
> a
> minute ago, this file is available here:
> <https://www.pda-soft.de/common/img/hardware/MainboardScansAllModels.zip>
> I currently do not have the time to do this, but if someone would take the
> trouble to mark these components with an arrow and send the pictures to
> Grant, they'd make a nice addition to our Newton FAQ. Or send them my way
> (preferred), and I'll host them and let Grant know where they are.
> If, as you say, you aren't a professional when it comes to soldering, do
> not
> try to unsolder the component in one piece. Use a Dremel tool or a very
> pointed wire cutter to cut the pins where they enter the chip. Then remove
> the chip. Now you can unsolder the pins separately, which is much safer.
> Use
> soldering wick to remove the tin from the soldering pads. Cover all pads
> with flux, put the chip on, align it, hold it down with a screwdriver and
> solder an edge pin. If the chip is still aligned OK, solder the edge pin
> opposite. Then solder the rest.
> A hot air gun CAN make this easier, but it can also remove half of the
> mainboard's components within a second if you aren't experienced enough.
> Good luck!
> Frank
> -- Newton software and hardware at http://www.pda-soft.de
> ----------------------------------------------------------------------
> http://newtontalk.net
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