BDY29 datasheet BDY29 component BDY29 integrated circuit BDY29 schematic BDY29 application note DY29 Y29 29 BDY2 BDY BD. BDY29 from Solitron Devices, Inc.. Find the PDF Datasheet, Specifications and Distributor Information. Part, BDY Category. Description, HIGH Power HIGH Current Transistor. Company, ETC. Datasheet, Download BDY29 datasheet. Cross ref. Similar parts: .

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FerrariChat – The world’s largest Ferrari community. Aug 25, Switzerland Full Name: Good day since last Summer, and only of a sudden, the fan blower speed control in the center consolle of datasehet TR just work on an on and off basis. It is impossible to regulate the fan speed. Nothing happens until the speed knob is virtually 1 mm from the end of its stroke.

At this point the blower work basically at full speed. Now the garage tell me is the fan motor which need to be changed.

Since this is a dash out job, and before entering into this new adventure, is there any way datsheet check if the problem could not be datashet the potentiometer speed regulator??

Tks for datashheet help on this matter Gianni. Steve Magnusson F1 World Champ. Jan 11, 17, Texas Full Name: Jul 8, Toronto Full Name: Loose screw on my power transistor board adtasheet mine with exact same symptom.

Aug 16, Sydney Full Name: If fan works on high it is definately not your fan motor! It will be the transistor sits in a heat sink that is riveted inside the air outlet duct below your radio. You can access this by carefully sliding a thin piece of plastic under the vent to push two tabs that release the vent- it then pulls out. Take off the trim panel to allow access for small drill or dremel to drill out rivets that hold the unit in the vent.

BDY29 datasheet & applicatoin notes – Datasheet Archive

I found 2NG or equivalent will work well. Mar 21, 2, New Jersey Full Name: ChairmanMay 19, I have been wanting to do mine for a long time now. I like having fan speed adjustments eventhough it will probably blow out again. Robbie, you should be able to order on line from any good electronics supplier. If you simply search BDY29 it will bdy9 up with Adtasheet sheets etc but I found it was not available so got an equvalent product.

Looks like have some work to do over the week end. ChairmanMay 20, I replace mine with 2n E made by On semiconductor also says Mexico Bm The hard part is finding a company that will sell you only one. Also ask for a heat sink for it that fits over the top. I put one on mine and I have had no trouble for 2 yrs here in AZ.

Dennis Try this datasheef http: If you want to chat about how to change it out, Pm me and will exchange phone s Dennis. Obviously the datashdet transistor was, in fact, good. Now bdy299 question, could it be the potentiometer on the tunnel? Any other idea where to look whilst the car is apart?

Well, at least yours worked properly for a short whille with a new fuse.


Have, in the meantime, removed the dash to fix the usual leather shrink, and removed the potentiometer. My fuse is good, so it cannot be the cause.

Noticed that the potentiometer used is welded into a small board circuit with few components. Wonder is bdj29 went bad there. Btw, the potentiometer in my car, has a datashert once fully turned counterclockwise. Is this normal or is it a sign it has been already replaced in the past?

Any advice how to test if the potentiometer is doing its job properly? There are six wires coming out the black box Unfortunately, there are two different TR AC units and three different TR speed controls and the wiring bdy9 a little different — and your report of having 6 wires on the fan speed control unit makes me think that you have the early type maybe with the built-in 1A fuse.

(PDF) BDY29 Datasheet download

What they all do have in common is that all three are based on the “common emitter” principle for the variable speed operation — i.

What I would do is: If 1 is OK, connect an ammeter into the wire going to the base terminal. If you have no current in this wire, that is a bad sign for the speed control unit — but also make sure that you have checked that the small 1A fuse if so equipped daatasheet the fan speed control unit is OK.

Otherwise, if you do some searches on terms like “base emitter” or “power transistor”, and you should get some prior threads like this: Tks Kerry and Steve.

Steve indeed my TR is an 87 model so quite an early one. And, yes, the fuse is 1 A and is mounted on the small box containing the speed control. Will try as you suggested, however, it will take datssheet time since, as said, the entire dash and central console are out of the car at present. Just for my piece of mind, is it normal that sped control knob has a switch integrated?

Your help is always much appreciated.

BDY29 Datasheet

Hola’ just a short update. It seems the problem is the potentiometer, or better say, one half of it. The poti is a double one with switch. Having removed it from the small circuit board and measure it, it seems that one half is doing a proper job whilst the other half is not. Now the bad news, whilst it seems difficult enough to get a double one with switch,there is no indication of the impedence on the Poti nor if it is linear or logaritmic type Hi since was asked by user Melvok abt fixing of the potentiometer, have revisited this post.

First of all had to removed the control panel on the center console, well, actually have removed the entire dash and the console ‘whilst i was in there’ as Shamile would say Then i removed the entire fan control unit. There are different control units for the TR and, unfortunately i was not able to get a used unit to match my car.


Decided, then, to dismantel the entire unit. After having open the black box, have unsoldered the potentiometer from the small circuit board and could measure datazheet impedence on each half and spotted that the lower half had no impedence at all.


I did separate the lower half from the upper by straightening the bended metal tab on the cover. I could then gain access to the heart of the potentiometer, the trimmer. The total measured impedence between the left and the right pins of the working half gave me Kohm. I could find a double potentiometer of Kohm at the local electronic shop for few dollar. Since this one had a different shape than the original and no switch, took it also apart to gain access to the trimmer itself.

The second pic below shows the trimmer removed from the original unit with no impedence at all and the third pic the trimmer removed from the new unit. Pic number four shows the old and new trimmer togheter right new, left old. The shape is not oct the same but, with datqsheet bit of work, the new trimmer can be fit in the old body. Re-installed it on the board and the entire control unit back on the panel.

Whilst in there, and altought it was not the cause of the fan not working, have replaced the power transistor and, as a precautional measure, added a cooling fin to it pic 5.

After having redone the front dash cover usual leather issuehave reinstalled the all dash and center console and the fun control unit works just fine. Have not tested the car on the road since we have temp as low as minus 22 C at the moment, but am sure it will work fine when summer comes again.

Melvok F1 World Champ. Jul datasheeet, 11, Amersfoort, Datasehet. Gianni, perfect description so Can you please post info on the donor new part Any pics on this: Sorry Mel dtasheet pics available. Anyhow is very simple and easy to figure out. The original potentiometer is double with a switch to turn the system on and off on the lower end. Each half is actully a stand alone unit. The rotation shaft on the upper half, continue till the bottom of the case with a pin into which the the shaft of the lower half will insert.

The housing of the lower half have 4 small metal tab which will enter into the upper case. By bending these tabs the two half will become an unit. The new one is simply a double linear potentiometer of Kohm impedence. Visually they look very similar, althought the new one had no switch and was a little bit shorter.

That is way i decided to maintain the original housing and just change the ‘heart’i. They are OMP racing seat with 4 point harness. Have them in the car since 8 years. They are getting covered in black Connolly leather to match the rest of the interior as we speak.

They look good also in red! You must log in or sign up to post here. Share This Page Tweet.