Blower Transistor

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jberg

Blower Transistor

Post by jberg »

So it appears that normgrills.net is down. All the links I have used in the past no longer work. I need to replace my heater blower transistor, normgrills had the correct number, but I cant access it. Does anyone have this number so I can go to my local electronics store and pick up this transistor? Thanks

Jorden
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Brucey
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Post by Brucey »

normgrills is not just down but out in a new direction it seems....

I found this post but I don't know if it is accurate or not

viewtopic.php?t=13292&highlight=blower+transistor

hth

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Post by Brucey »

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nick88highline
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Post by nick88highline »

Here are two pictures of what a new transistor board looks like from BMW:

<img src="http://farm7.static.flickr.com/6193/605 ... 1174_z.jpg" width="640" height="480" alt="IMG_6747">

<img src="http://farm7.static.flickr.com/6067/605 ... c354_z.jpg" width="640" height="426" alt="IMG_6744">

The transistor type is a 2N3771.
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Michael , Denmark

Transistor

Post by Michael , Denmark »

3 US for the transistor.

http://dk.rs-online.com/web/294429.html ... 3771_Broad

Michael from Denmark
Chris Wright

Post by Chris Wright »

Yes, the original transistors are 2N3055 (10A). The replacements are a 2N3771 (15A). Here is the Norm Grills page captured by the Wayback Machine:


http://web.archive.org/web/200803071213 ... sistor.htm
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Post by Brucey »

-good work digging out the archive version of the page there Chris; but.... why don't I see the images when I try and load that page? Am I doing something stupid (again...)?

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Post by Brucey »

BTW all the original picture thumbnails still appear on a Google search of the Normgrills page (normgrills blower transistor), but obviously don't click through properly....

http://www.google.com/images?q=normgril ... art=0&sa=N

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Chris Wright

Post by Chris Wright »

Hmm .... I just tried it again and the pics came up.

Maybe you have to make an original search on the Wayback Machine:

http://www.archive.org/web/web.php with the original link:

http://normgrills.net/bcg/Blower_Transistor.htm
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Post by Brucey »

good idea but still no-go for some reason. how odd......

is it just me then?

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Post by winfred »

i mounted the new speed control to the original board to ease mounting and keep it in the airflow on the last blower job i did

Image
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Chris Wright

Post by Chris Wright »

Brucey wrote:good idea but still no-go for some reason. how odd......

is it just me then?

cheers
You know, I am still on dial-up and have a large cache set on my browser to help download speed. I think I still get the photo's because they are still in the cache !?! (IIRC, I visited this link just a week or so ago).

I "downloaded" the page while the photos were up, now all I have to do if figure the easiest way to turn it into a PDF (I think the Mac will "Print" the page direct to a PDF file).
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Post by Kelowna635 »

Wow, was that ever easy to change....
I now have a fan that blows air at different speeds.
Thanks for the info about the transistor, got one for $3.98.
A bit of a PIA to get it off the board, but a drill, a soldering iron and a rivet gun and it works.... Gota love this forum, saves me so much $$
DIY all the way.... :D
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Chris Wright

Post by Chris Wright »

Anyone know what that black square thing is on the upper left of the back of the transistor mounting plate in the photo?

Image
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Post by Brucey »

Chris,
forgive my stupid question but which part is this? Is it from the control end, identified as 'solid state' on the ETM diagram? Or is it a part that isn't shown at all on the ETM?

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Chris Wright

Post by Chris Wright »

.
Good News .... Normgrills seems to be up and running again, that was a bit of a scare.
Brucey wrote:Chris,
forgive my stupid question but which part is this? Is it from the control end, identified as 'solid state' on the ETM diagram? Or is it a part that isn't shown at all on the ETM?

cheers
It is the backside of the new replacement Heater Blower Transistor plates being supplied, I nicked the photo from nick88highline's post above which has photos of both sides. The ETM just calls it "Heater, Final Stage" but only shows the transistor.

IIRC, a resistor was added across the Base and Emitter pins to run the heater blower at a very low speed like the A/C blower was already set up to do. The originals didn't have it?

I was just wondering what that black thing was that appears to be inline with the base pin? :-k
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Re: Blower Transistor

Post by jt »

I know this is a necro post, but I figured out what the little thing under the black clip is - it's a thermal breaker. It's made by a company named Uchiya and breaks at 110 degree Celsius. In case anyone wants to know...
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Re: Blower Transistor

Post by dlvad »

Hey JT
What’s up in FL, This is a Tedious bit of Soldering. You likely own one these too..
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Re: Blower Transistor

Post by TimU »

The NormGrills page looks like it's permanently gone, but the content and pics are still available via the wayback machine:
https://web.archive.org/web/20080307121 ... sistor.htm

I've would attached a PDF export of the page for posterity, but the forum has a 2MB file size limit ](*,)
PM me if you'd like a copy.

Also, the 2N3xxx series transistors have apparently gone end-of-life from , so it might be worth stocking up on a handful.

The original transistors are 2N3055 (10A).
Suitable replacements are:
2N3773 (15A)
2N3771G (30A)

I just bought a pair of 2N3771G components from https://au.element14.com/search?st=2n3771g for AU$12.28 each for shipping to Australia.
Ebay has heaps of sellers too, but all with unknown shipping times from China.
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Re: Blower Transistor

Post by 86_6series »

Thanks for the Norm Grills link.
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