[NTLK] Error with Sony power adapter SCP-114

[Morgan Aldridge]

There is a well-documented history regarding the fragility of the
MessagePad & eMate hardware having _very_ strict power requirements, as
Pawel has described. There are some details in the Newton FAQ, including
your new suggestion of the Sony adapters:

<https://newtonfaq.com/newton-faq-hardware.html#IIB7>

Pawel is correct that anything more than 7.5V is extremely risky for the
Newton power circuitry and because many devices are more forgiving with
fluctuations, third party adapters are prone — if not likely — to
temporarily spike above 7.5V.

For  some of the technical details, see the "Power Adapter Designer's
Guide" which is archived on UNNA:

<http://www.unna.org/unna/apple/documentation/n2platform/n2-padg.pdf>

Morgan

On Sun, Jul 20, 2025 at 12:12 SonyTEL via NewtonTalk <
newtontalk at newtontalk.net> wrote:

>
> A voltage measurement (7.5V) cannot be taken when the device is empty...
> But when it is connected to the device, i.e. the Newton ;-)
>
> In my opinion, Sony had no intention of blowing up its PlayStation One
> consoles...
>
>  BrUnO
>
>
> > Le 20 juil. 2025 à 16:25, Pawel Piotrowski <newton at indigi.co.uk> a
> écrit :
> >
> > Yes, can be a problem if power adapter deliver higher voltage than 7.5V.
> Many power adapters do that and they deliver more than nominal without any
> load. And that what Newton does not like. And that can even break the
> Newton.
> >
> > The fact that the nameplate shows 7.5V does not guarantee that the
> multimeter will not show a higher voltage when you do not connect the power
> supply to any power receiver.
> >
> >
> > Cheers,
> > Pawel
> >
> >> On 20 Jul 2025, at 14:41, SonyTEL via NewtonTalk <
> newtontalk at newtontalk.net> wrote:
> >>
> >>
> >> There is no error...
> >>
> >> The voltage is 7.5V.
> >> The current CAN deliver up to 2A.
> >>
> >> If the Newton requires 0.5A, for example, it will only consume 0.5A...
> >> If the Newton requires 1.2A, for example, it will only consume 1.2A...
> >>
> >> As this Sony power supply CAN deliver up to 2A, it will generate less
> heat in all cases! And as a result, it will last longer...
> >>
> >> Nothing but advantages!!!  Positive ones ;-)
> >>
> >> BrUnO
> >>
> >>
> >>> Le 20 juil. 2025 à 15:22, Pawel Piotrowski <newton at indigi.co.uk
> <mailto:newton at indigi.co.uk>> a écrit :
> >>>
> >>>
> >>>
> >>>> On 19 Jul 2025, at 14:33, Fabrice Braun <f at fabricebraun.de> wrote:
> >>>>
> >>>> As it was recommended in this list, I bought a (used) Sony SCPH-114
> power adapter (European/German version) for my eMate.
> >>>>
> >>>> But now, when I start my eMate I get this error message:
> >>>>
> >>>> „POWER The adapter is providing too much power. The battery cannot be
> charged with this adapter.“
> >>>>
> >>>> Does anyone know, what’s wrong? The orange light on the meat is on.
> >>>>
> >>>> Fabrice
> >>>
> >>>
> >>> Hi Fabrice!
> >>>
> >>> I would check if that Sony adapter does not exceed 7.5V (check with
> any multimeter). If the voltage is even more higher than 7.5V, you have
> your problem.
> >>>
> >>> The original Apple power adapter for Newton has 7.5V, 1.2A, so the
> voltage is fine, and the 2A on your Sony shouldn’t be a problem. The only
> problem (I guess) may be voltage higher than 7.5V.
> >>>
> >>>
> >>>
> >>> Best regards,
> >>> Pawel Piotrowski
> >>>
> >>> Worldwide Apple Newton Users Map: http://user-map.applenewton.co.uk <
> http://user-map.applenewton.co.uk/> <http://user-map.applenewton.co.uk/>
> >>>
> >>> NPDS Server: http://newton1.applenewton.co.uk:8079 <
> http://newton1.applenewton.co.uk:8079/> (powered by Newton 2100)
> >>> NPDS Tracker Server: http://tracker.applenewton.co.uk:3680 <
> http://tracker.applenewton.co.uk:3680/> <
> http://tracker.applenewton.co.uk:3680/> (powered by Raspberry Pi)
> >>>
> >>> Facebook: https://www.facebook.com/applenewtonfan/
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> >>
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