I have fried the PSU for my Portege 3440CT and wonder if i can use a PSU
from something else, because a new one for that exact model cost a small
fortune. Output was 15 v and 2 a, how close to that does it have to be?

--
Lasse Jensen [fafler at g mail dot com]
Linux, the choice of a GNU generation.

"Lasse Jensen" <fafler******.com> wrote in message
news:45478201$0$180$157c6196@dreader1.cybercity.dk
> I have fried the PSU for my Portege 3440CT and wonder if i can use a
> PSU from something else, because a new one for that exact model cost
> a small fortune. Output was 15 v and 2 a, how close to that does it
> have to be?

Just 15vdc and 2 or more amps should do the trick. And make sure the
polarity is correct.

--
Bill

"Lasse Jensen" <fafler******.com> wrote in message
news:45478201$0$180$157c6196@dreader1.cybercity.dk ...
> I have fried the PSU for my Portege 3440CT and wonder if i can use a PSU
> from something else, because a new one for that exact model cost a small
> fortune. Output was 15 v and 2 a, how close to that does it have to be?

It shouldn't be a problem if your soldering skills are up to it - any 15VDC
supply rated at least 2amps should be fine. Are replacement 3440 supplies
that expensive? I found one for my 3480 for about $20 in the UK on eBay :)

--
Alex Quant

~ Reply-To is set to a valid email address ~

~ www.alexquant.net ~

All Toshiba laptops that use 15 volts supplies can take any 15 volt DC
power supply (even non-Toshiba) with the correct connector (and
polarity) and "enough" output current (which may be well below the value
marked, in some cases). All of the Toshiba 15 volt laptops and 15 volt
power supplies use the same connector. Toshiba laptops and adapters
range from 2 amps to 5 amps in rated current capacity. You can buy the
3 amp units on E-Bay for about $5 to $15, plus shipping. Be sure it's a
15-volt model, some Toshiba laptops use other voltages. There are also
3rd party power supplies (Targus, Fellowes and many others), these will
work fine if you watch the voltage, polarity, connector (some are
interchangeable) and current capacity.


Lasse Jensen wrote:
> I have fried the PSU for my Portege 3440CT and wonder if i can use a PSU
> from something else, because a new one for that exact model cost a small
> fortune. Output was 15 v and 2 a, how close to that does it have to be?
>

Alex Quant wrote:

> "Lasse Jensen" <fafler******.com> wrote in message
> news:45478201$0$180$157c6196@dreader1.cybercity.dk ...
>> I have fried the PSU for my Portege 3440CT and wonder if i can use a PSU
>> from something else, because a new one for that exact model cost a small
>> fortune. Output was 15 v and 2 a, how close to that does it have to be?
>
> It shouldn't be a problem if your soldering skills are up to it - any
> 15VDC supply rated at least 2amps should be fine. Are replacement 3440
> supplies that expensive? I found one for my 3480 for about $20 in the UK
> on eBay :)

Including shipping and the fact that the PSU burns out again, when it falls
down between the cushions in the sofa. This is the second one.

But is 16.2 v a no go?

--
Lasse Jensen [fafler at g mail dot com]
Linux, the choice of a GNU generation.

I would use a 16.2 volts supply only briefly and only for an emergency.
You will PROBABLY "get away" with it, but you might damage or even
destroy the laptop.

[Keep in mind, both the laptop and the power supplies have a tolerance.
A 16.2 volt supply that was really putting out 10% more would be
putting out 17.8 volts.]


Lasse Jensen wrote:

> Alex Quant wrote:
>
>
>>"Lasse Jensen" <fafler******.com> wrote in message
>>news:45478201$0$180$157c6196@dreader1.cybercity. dk...
>>
>>>I have fried the PSU for my Portege 3440CT and wonder if i can use a PSU
>>>from something else, because a new one for that exact model cost a small
>>>fortune. Output was 15 v and 2 a, how close to that does it have to be?
>>
>>It shouldn't be a problem if your soldering skills are up to it - any
>>15VDC supply rated at least 2amps should be fine. Are replacement 3440
>>supplies that expensive? I found one for my 3480 for about $20 in the UK
>>on eBay :)
>
>
> Including shipping and the fact that the PSU burns out again, when it falls
> down between the cushions in the sofa. This is the second one.
>
> But is 16.2 v a no go?
>

Barry Watzman wrote:

> I would use a 16.2 volts supply only briefly and only for an emergency.
> You will PROBABLY "get away" with it, but you might damage or even
> destroy the laptop.
>
> [Keep in mind, both the laptop and the power supplies have a tolerance.
> A 16.2 volt supply that was really putting out 10% more would be
> putting out 17.8 volts.]

I'm soldering 2 rectifier in between with a voltage drop of 0.7 volts each.
That should make it 14.8 volts.

--
Lasse Jensen [fafler at g mail dot com]
Linux, the choice of a GNU generation.

"Lasse Jensen" <fafler******.com> wrote in message
news:4547c5c8$0$183$157c6196@dreader1.cybercity.dk
> Barry Watzman wrote:
>
>> I would use a 16.2 volts supply only briefly and only for an
>> emergency. You will PROBABLY "get away" with it, but you might
>> damage or even destroy the laptop.
>>
>> [Keep in mind, both the laptop and the power supplies have a
>> tolerance. A 16.2 volt supply that was really putting out 10% more
>> would be putting out 17.8 volts.]
>
> I'm soldering 2 rectifier in between with a voltage drop of 0.7 volts
> each. That should make it 14.8 volts.

Yes that works, but it will be noisy. Please add some big caps for
filtering, ok? Also check it under load and you might not need one or
two diodes anyway.

--
Bill

It should work, but why? You can buy the Toshiba genuine power supplies
on E-Bay for $5 to $15.


Lasse Jensen wrote:

> Barry Watzman wrote:
>
>
>>I would use a 16.2 volts supply only briefly and only for an emergency.
>> You will PROBABLY "get away" with it, but you might damage or even
>>destroy the laptop.
>>
>>[Keep in mind, both the laptop and the power supplies have a tolerance.
>> A 16.2 volt supply that was really putting out 10% more would be
>>putting out 17.8 volts.]
>
>
> I'm soldering 2 rectifier in between with a voltage drop of 0.7 volts each.
> That should make it 14.8 volts.
>

BillW50 wrote:
> "Lasse Jensen" <fafler******.com> wrote in message
> news:4547c5c8$0$183$157c6196@dreader1.cybercity.dk
>> Barry Watzman wrote:
>>
>>> I would use a 16.2 volts supply only briefly and only for an
>>> emergency. You will PROBABLY "get away" with it, but you might
>>> damage or even destroy the laptop.
>>>
>>> [Keep in mind, both the laptop and the power supplies have a
>>> tolerance. A 16.2 volt supply that was really putting out 10% more
>>> would be putting out 17.8 volts.]
>>
>> I'm soldering 2 rectifier in between with a voltage drop of 0.7 volts
>> each. That should make it 14.8 volts.
>
> Yes that works, but it will be noisy. Please add some big caps for
> filtering, ok? Also check it under load and you might not need one or
> two diodes anyway.

It won't be noisy at all. It's a straight diode drop, it's not like he's
filtering out of the rectifier.

I think it's rather silly, given you can get a replacement supply for
about $35, but the two diodes cost only about 50 cents.

"SMS" <scharf.steven@geemail.com> wrote in message
news:45490dfb$0$88677$742ec2ed@news.sonic.net
> BillW50 wrote:
>> "Lasse Jensen" <fafler******.com> wrote in message
>> news:4547c5c8$0$183$157c6196@dreader1.cybercity.dk
>>> Barry Watzman wrote:
>>>
>>>> I would use a 16.2 volts supply only briefly and only for an
>>>> emergency. You will PROBABLY "get away" with it, but you might
>>>> damage or even destroy the laptop.
>>>>
>>>> [Keep in mind, both the laptop and the power supplies have a
>>>> tolerance. A 16.2 volt supply that was really putting out 10%
>>>> more would be putting out 17.8 volts.]
>>>
>>> I'm soldering 2 rectifier in between with a voltage drop of 0.7
>>> volts each. That should make it 14.8 volts.
>>
>> Yes that works, but it will be noisy. Please add some big caps for
>> filtering, ok? Also check it under load and you might not need one or
>> two diodes anyway.
>
> It won't be noisy at all. It's a straight diode drop, it's not like
> he's filtering out of the rectifier.
>
> I think it's rather silly, given you can get a replacement supply for
> about $35, but the two diodes cost only about 50 cents.

Diodes are not clean though. Well at least zener diodes are very noisy
and regular diodes probably isn't that clean either. Just scope it and
see for yourself.

Yeah a replacement power supply is really the way to go. :)

--
Bill