Lenovo FRU 13n2950 or 2951 fan spec

[Mr.E]

I need to replace a fan on the 13n2950 cpu cooler but I have no source
of the fan specs as to a replacement. It does use onboard fan speed
modulation so the current needs to be close.
Thanks
--
Mr.E

[Jeff Liebermann]

You can buy the fan and heat sink assembly from many vendors:
<https://www.google.com/#q=13n2950>
<https://www.google.com/#q=13n2951>
I'll assume that the label on the fan has no useful info or is
missing. You can measure the case size with a ruler. The fan power
is probably 12V and you can measure the maximum current by just
applying 12V to the red and black wires and measuring the current with
an ammeter, leaving the white wire unconnected. However, there's the
problem of whether the third wire supplies tachometer feedback (i.e.
speed info), or some kind of pulse width sensing. You should be able
to determine that with an oscilloscope. Then, you get to sift through
data sheets trying to find a suitable match. Unless you need a fair
quantity of fans, I suspect that you will find it easier and cheaper
to just buy the assembly:
<http://www.ebay.com/sch/i.html?_nkw=13n2950>
<http://www.ebay.com/sch/i.html?_nkw=13n2951>
<https://www.amazon.com/Genuine-IBM-Thinkcenter-Desktop-Heatsink/dp/B00MFW7H5C>


--
Jeff Liebermann je...@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

[~misfit~]

Once upon a time on usenet Mr.E wrote:
> On Sun, 12 Jun 2016 11:51:50 -0400, Mr.E <Mr...@totally.invalid> wrote:
>

> The fan on a 13n2951 is a Matsushita 2806KL-04W-B89.
>
> 12 Volt - 650 ma with a 42 cfm at 38dba rating.
>
> Dimensions are 70 x 70 x 15 mm and the third wire is a tach lead.

I've never known a ThinkPad fan to *not* be 5v before. I guess you learn
something every day.
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)

[Mr.E]

On Thu, 16 Jun 2016 20:46:54 +1200, "~misfit~"
<shaun.at...@gmail.com> wrote:

>Once upon a time on usenet Mr.E wrote:
>> On Sun, 12 Jun 2016 11:51:50 -0400, Mr.E <Mr...@totally.invalid> wrote:
>>
>>> I need to replace a fan on the 13n2950 cpu cooler but I have no
>>> source of the fan specs as to a replacement. It does use onboard fan
>>> speed modulation so the current needs to be close.
>>
>> The fan on a 13n2951 is a Matsushita 2806KL-04W-B89.
>>
>> 12 Volt - 650 ma with a 42 cfm at 38dba rating.
>>
>> Dimensions are 70 x 70 x 15 mm and the third wire is a tach lead.
>
>I've never known a ThinkPad fan to *not* be 5v before. I guess you learn
>something every day.

The FRU 13N2590 is a desktop FRU. The thinkpad group was "fishing" for a
knowledgeable repair person for Lenovo.
--
Mr.E

[~misfit~]

Once upon a time on usenet Mr.E wrote:
> On Thu, 16 Jun 2016 20:46:54 +1200, "~misfit~"
> <shaun.at...@gmail.com> wrote:
>> Once upon a time on usenet Mr.E wrote:
>>> On Sun, 12 Jun 2016 11:51:50 -0400, Mr.E <Mr...@totally.invalid>
>>> wrote:
>>>
>>>> I need to replace a fan on the 13n2950 cpu cooler but I have no
>>>> source of the fan specs as to a replacement. It does use onboard
>>>> fan speed modulation so the current needs to be close.
>>>
>>> The fan on a 13n2951 is a Matsushita 2806KL-04W-B89.
>>>
>>> 12 Volt - 650 ma with a 42 cfm at 38dba rating.
>>>
>>> Dimensions are 70 x 70 x 15 mm and the third wire is a tach lead.
>>
>> I've never known a ThinkPad fan to *not* be 5v before. I guess you
>> learn something every day.
>
> The FRU 13N2590 is a desktop FRU. The thinkpad group was "fishing"
> for a knowledgeable repair person for Lenovo.

Ahh, ok. I guess if I'd looked at the fan size I would have maybe noticed.
However the "12 Volt" thing jumped out at me first.

w/r/t desktop fans I just match physical size, number (and function) of
wires and rated current draw or volume of air moved. Sometimes only a few of
the preceeding. ;)