From: Sonny Hung (sonnyhung_at_gmail.com)
Date: Tue Apr 26 2005 - 08:13:07 PDT
HI Everyone,
I didn't get to ask anyone on list first if anyone had tried to
contact Siemens Directly.
Being a bit jumpy to get my NotePhone fixed I thought I'd give it a shot...
The following is the majority of my email reply from the Siemens Representa=
tive.
<CLIP>
Dear Mr. Hung,
=20
I can confirm the former brandname Notephone is a Trade Mark of Siemens AG =
and=20
belonged to the market segment of telephone sets.
The Notephone(tm) telephone had a docking station for an Apple Newton(r) PD=
A.
=20
However, at this time I cannot pick up any Service Manual or any User
Manual from our
archival that describes this product, which was actual in the 1990's.
So now we have the question if they even have the Service
Manual/Schematics in their archives...
Anyone have any other ideas?
--=20
God bless,
Sonny Hung
the Hung Family
On 4/22/05, Sonny Hung <sonnyhung_at_gmail.com> wrote:
> Hi Everyone,
>=20
> Here is an email I got as a reply for assistance from a Fellow
> Newtonian. (Who has a MP120 speed upgrade on line at his website.)
>=20
> In any case this is his response to my request for assistance.
> I hope someone can explain to me what a optoisolator is and looks like...
>=20
> <FORWARDED MSG>
> Lewin A. R. W. Edwards
> to me
> More options 7:39 pm (2=BD hours ago)
> > The problem this unit has seems to be an issue with all of these
> > models due to their age. The vernacular description is that the
> > electronics that handle the phone registering that it's hung up is not
> > working properly. There are no schematics and we have not been able to
> > find one so no one is able to trouble shoot this.
>=20
> I recall having a very similar problem with a certain breed of modem
> (it was a Zoom Telephonics design). As I recall either a transistor or
> an optoisolator blew. However your description of a heat-related fault
> sounds not entirely consistent with that. I assume there is no relay on
> this design, that it uses solid-state hook switching. I'd start by
> replacing the optoisolator and if that doesn't work, simply start at
> the jack backwards and replace all the semiconductors you can.
>=20
> I'm afraid I'm just too committed on other projects to take a look at
> this in detail, it sounds like a fairly major reverse-engineering
> effort, and frankly right now all my out-of-hours time is 150%
> allocated.
>=20
> --
> Lewin A.R.W. Edwards
> Consulting - http://www.zws.com/
> Personal - http://www.larwe.com/
> Check out my books on embedded engineering!
> <http://www.amazon.com/exec/obidos/ASIN/0750676094/zws-20/>
> <http://www.amazon.com/exec/obidos/ASIN/0750677783/zws-20/>
> <FORWARDED MSG>
> --
> God bless,
>=20
> Sonny Hung
> the Hung Family
>
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