good place to buy this transistor?

jimbodeanny

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U5000: good place to buy this transistor?

I've got a wells 25" U5000 (no pincushion board) that I recently recapped. I've got everything dialed in, but it still has a slight bowing (hourglass) to it. It's pretty minor, and I could live with it, but I figure I might as well tackle this pincushion issue while I'm at it.

Upon a little searching, I found this thread that appeared to cover my exact issue (http://forums.arcade-museum.com/showthread.php?t=119758&highlight=u5000+pincushion)

So I'm thinking I'll try replacing the Q710 transistor and seeing if that fixes my issue. According to the U5000 manual, it lists it as "BDX53A SGS NPN DAR". Is this something I can find at Radioshack or can someone direct me to where I can buy this transistor?

Also, while I'm replacing this transistor, is there any other parts I should replace while I'm at it?

Thanks!

-Jim
 
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Ok so I did a bit of research, and the BDX53A is a pretty obsolete part. However, Fairchild Semiconductor recommends the BDX53B as a replacement part, which seems to be in stock at Mouser, at least (http://www.mouser.com/ProductDetail...=tZUCD5p2VWomNzZ/8SGOIrUiP50PHGYbWGjfmqKtj6Y=).

Datasheet:
http://www.datasheetcatalog.org/datasheet/PowerInnovations/mXturyr.pdf

It seems to me that the BDX53B is just an updated version of the BDX53A, as I can't see any difference between the two. Maybe someone else can confirm this?
 
Thanks for the replies.

I'm working on a mouser cart list for parts right now. I've added a couple transistors for Q710, with the hopes of it solving my slight pincushion (hourglass) issue -- like it did for Cadillacman. Are there any other transistors, resistors or parts that I should also try? I figure I might as well order some more small parts from mouser while I'm at.

I'm thinking maybe Q709, R751, and R752? Any suggestions?
 
NTE has a cross reference for BDX53A -- NTE263. See if you have a electronics supplier local that carries it. Nope.. Radio Shack doesn't.
 
You might as well load up on caps for monitors and audio sections of game boards while you are at it.

RJ
 
WHile you are at it, you may want to consider doing the updates. WHen all else fails, take a walk to kens corner lol..

http://home.comcast.net/~mtpacifico/_kenskorner/files/WG U2000 - U5000 Service Kits.pdf


I would at least do the horizontal output update, at a bare minimum reflowing that transistor and cutting back the plastic.


ebay and China can be your friend from time to time, but you have to wait wait wait for shipping.

http://www.ebay.com/itm/10pcs-BDX54...527?pt=LH_DefaultDomain_0&hash=item2c636fd947

http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=bdx53&_sacat=0
 
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WHile you are at it, you may want to consider doing the updates. WHen all else fails, take a walk to kens corner lol..

http://home.comcast.net/~mtpacifico/_kenskorner/files/WG U2000 - U5000 Service Kits.pdf


I would at least do the horizontal output update, at a bare minimum reflowing that transistor and cutting back the plastic.


ebay and China can be your friend from time to time, but you have to wait wait wait for shipping.

http://www.ebay.com/itm/10pcs-BDX54...527?pt=LH_DefaultDomain_0&hash=item2c636fd947

http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=bdx53&_sacat=0

Ordered a bunch of resistors and transistors from Mouser and yesterday and received the shipping notification. I'm going to be replacing Q709, Q710, Q703 and a few of the local resistors in the area.

I'll probably check out Q705 and trim the plastic and reflow the solder as well.

The pincushion bowing issue isn't a huge issue or very noticeable unless there's a grid displayed and even then it's fairly slight. But I'd like to hammer it out if I can. I figure I already capped it, so I may as well replace a few possibly problematic resistors/transistors.
 
Look at L103 too, all of mine were burnt or gone on the 5 U5000 chassis's I own.
I found one very close at mouser with a much higher current rating, hopefully won't burn again. Haven't tried it, but if the monitor can work with a dead short installed, one with a slightly different inductance should work.

As the rest said, go through the update instructions, make sure heatsinks are on the transistors as specified. Mouser also sells them too.
 
L103 pics, old and new (not installed yet)

516d5084.jpg


01efa8d3.jpg
 
OH BALLS!! man, those char!! But why??? due to bad caps i would assume? I see that alot in flatscrene tvs when the caps get high esr somehow it stresses the coil.
 
WHile you are at it, you may want to consider doing the updates. WHen all else fails, take a walk to kens corner lol..

http://home.comcast.net/~mtpacifico/_kenskorner/files/WG U2000 - U5000 Service Kits.pdf


I would at least do the horizontal output update, at a bare minimum reflowing that transistor and cutting back the plastic.


ebay and China can be your friend from time to time, but you have to wait wait wait for shipping.

http://www.ebay.com/itm/10pcs-BDX54...527?pt=LH_DefaultDomain_0&hash=item2c636fd947

http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=bdx53&_sacat=0


Yeah, I ordered a bunch of resistors and transistors from Mouser and they should be arriving tomorrow. I'm going to be replacing Q709, Q710, Q703 and a few of the local resistors in the area. I'll probably check out Q705 and trim the plastic and reflow the solder as well. I don't recall seeing anything burnt on the board (such as L103), but I'll look it over again.

Again, the pincushion bowing issue isn't a huge issue or very noticeable unless there's a grid displayed and even then it's fairly slight. But I'd like to hammer it out if I can. I figure I already capped it, so I may as well replace a few possibly problematic resistors/transistors. Right now the monitor works well (other than the slight pincushion issue.) In fact, all of the adjustments work well (width, height, position, etc.) Since this is the 25" version, I don't have a remote pincushion board, otherwise I'd try that.

I'm hoping that replacing these transistors/resistors will do the job. If not, I can live with it. I don't see a reason for doing all of the updates since it doesn't have any other issues that the upgrades are supposed to fix - although I haven't checked closely to see if the power or vertical sweet upgrades have been done.
 
I don't see a reason for doing all of the updates since it doesn't have any other issues that the upgrades are supposed to fix - although I haven't checked closely to see if the power or vertical sweet upgrades have been done.

Keep in mind, the "updates" are reliability fixes, not necessarily to fix a current condition. Make sure the plastic is trimmed under the one transistor and appropriate heat sinks are added. It's all preventative, but I also think many U5000's have already been completed.
 
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