Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default Lenovo FRU 13n2950 or 2951 fan spec

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
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Default Lenovo FRU 13n2950 or 2951 fan spec

On Sun, 12 Jun 2016 11:51:50 -0400, Mr.E 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.
Thanks


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


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Skype: JeffLiebermann AE6KS 831-336-2558
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Default Lenovo FRU 13n2950 or 2951 fan spec (Found)

Once upon a time on usenet Mr.E wrote:
On Sun, 12 Jun 2016 11:51:50 -0400, Mr.E 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 Matsu****a 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)


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Default Lenovo FRU 13n2950 or 2951 fan spec (Found)

On Thu, 16 Jun 2016 20:46:54 +1200, "~misfit~"
wrote:

Once upon a time on usenet Mr.E wrote:
On Sun, 12 Jun 2016 11:51:50 -0400, Mr.E 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 Matsu****a 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
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Default Lenovo FRU 13n2950 or 2951 fan spec (Found)

Once upon a time on usenet Mr.E wrote:
On Thu, 16 Jun 2016 20:46:54 +1200, "~misfit~"
wrote:
Once upon a time on usenet Mr.E wrote:
On Sun, 12 Jun 2016 11:51:50 -0400, Mr.E
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 Matsu****a 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.
--
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)


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