In article <brelh2$2hdn1$(E-Mail Removed)>, "Herbert Nagler"
<(E-Mail Removed)> wrote:
> Sorry to hear about your experience.
> I have a P-Touch 2420 PC sitting next to my desktop and I absolutely love it
> ( no batteries). Reading about your trouble, I examined my Brother adaptor,
> which came with it (A40914A - Output 9.5VDC, 1.4A). Looking at the pinout
> diagram, it suggests, that the centre pin is negative (unusual). I just
> wonder, if your Radio Shack adaptor is centre pin positive. That would be an
> honest mistake to make, because most appliances of this kind nowadays have a
> positive.ctr.pin. Maybe you can return it, if that's the case.
> Just a thought.....but thanks for your info, tell us how you went.
>
> Good luck
> H.N.
> ------------------------------
I'm careful about stuff like that. You have to rotate the adaptaplug 180
degrees and plug it in, to get negative center. I check with a meter before
plugging something like that in, as a mistake would lead to instant
destruction. The P-Touch still works, it just cost me more to get it
there than I would have liked. If Brother had printed 9V 1.2A on the side
of the chassis, I wouldn't be posting here right now.
Paul
>
>
> Paul wrote:
> > I figured I'd post this here, as I don't know of a place
> > where this would be more on topic. I wasted a few bucks
> > figuring this out, so some other people might benefit
> > from my bad luck.
> >
> > I picked up a Brother PT-1750 label maker. It takes
> > six AA batteries (9 volts worth). When I got to the cash
> > with my purchase, the cashier said it has an optional adapter,
> > something I wasn't expecting to have to purchase. I took a
> > pass on the official adapter and headed to Radio Shack.
> >
> > The Brother has printed in the manual and on the side of the
> > chassis, that is uses 7V 1.2 amps for the adapter. I bought
> > a 7V 2.1 amp adapter from Radio Shack (the extra current
> > capacity means it can easily handle a 1.2 amp load). It didn't
> > work. The display lit up but after two seconds, the unit switched
> > off.
> >
> > So, I ended up buying the official AD-30 7V 1.2Amp adapter,
> > for $40 Canadian. I took it home and got out my voltmeter.
> > With no load, the adapter puts out 9.4 volts. What this means
> > is, the adapter is an old style _unregulated_ adapter. When
> > zero current is flowing, it puts out 9.4 volts (roughly the
> > same voltage as the batteries would). When you draw 1.2 amps,
> > it puts out 7 volts. Almost all Radio Shack adapters now, are
> > tightly regulated. My 7V Radio Shack adapter puts out 7.03 volts
> > at no load and also when drawing 1.55 amps.
> >
> > So, what happens is, the P-Touch checks to see if the adapter
> > provides 9V before starting up the heavy current consuming
> > parts of the unit. My Radio Shack purchase looked "weak" to it,
> > so it didn't start.
> >
> > While I haven't done this experiment, you might also have better
> > luck if you connect a 9VDC regulated supply to the unit, because
> > at least then it will stay powered on. The 9VDC regulated supply
> > would look exactly like a set of batteries.
> >
> > Hope this helps somebody, and saves them buying the wrong adapter.
> >
> > Paul
|
Similar Threads
