Re: [NTLK] Battery power woes

From: Johannes Wolf (
Date: Mon Jun 27 2005 - 08:35:18 PDT

Hi Matthew,

to come to the battery issue first:
I would strongly recommend to check the CONTACTS to the battery pack.
It might also be the case that the contact pressure is too low.
How comes the battery pack out if you relaease it?
There are two more contacts on top of the battery compartment (Newton laying
upside down)that might need to be realigned...

Regarding the transformer: this is for sure the transformer of a dc/dc
The top is not plastic but ferrite and it is not only the top but also the
bottom - this is considered to be a ferromagnetic core.
The two halfs of the core are glued together, but sitting quiet loose on the
transformer coil.
As long as the two ferrite parts are glued together everything should be
fine (from an electrical point of view)


> -----Original Message-----
> From:
> []On Behalf Of Matthew Reidsma
> Sent: Saturday, June 25, 2005 12:57 AM
> To:
> Subject: [NTLK] Battery power woes

> Greetings Newtoneers,

> I've been having some difficulty of late with my trusty sidekick, my
> MP2100 (non-upgraded). It seems that there is a poor connection
> somewhere in the battery circuitry on the board, as randomly my Newt
> will die and immediately revive itself, claiming that "the battery was
> dead." The battery, however, is never dead, since it revives itself
> without being plugged into AC power. It also happens regardless of
> whether I am using the pack or the AA sled. So, having 10 years of
> board level repair under my belt (although dusty from 2 years of grad
> school in medieval history), I tore my trusty Newt apart, for about the
> 6,345th time since we met. It was like coming home.

> Anyway, nostalgia aside, I have not succeeded in spotting any cold or
> cracked solder joints, and was going to touch up the main connectors to
> be safe when I noticed something peculiar on the card-slot side of the
> board: T2, the wee little Transformer (marked 06A-4002 DEL9727B) has an
> *extremely* loose and wobbly plastic cover (which displays the part
> number). While I am unsure what function this transformer plays in the
> circuitry, and the cover seems plastic and thus is not likely directly
> causing problems, I was a bit concerned about what might cause this to
> come so loose. It is possible, of course, that it could have been this
> loose for years, and that I never noticed it. Perhaps everyone has a
> very loose T2 cover. (That's a good name for a band.) Anyway, I can
> move the cover up about 1/8 of an inch (or ~30mm for you metric types).
> I can also move it a bit back and forth.

> For clarity's sake, here is a photo of the little bugger:


> Any ideas?

> -Matthew Reidsma
> Boston, MA U.S.A.

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