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(Topic ID: 279517)

Stern Transistor part #


By Spiderpin

5 days ago



Topic Stats

  • 25 posts
  • 7 Pinsiders participating
  • Latest reply 2 days ago by Pin_Guy
  • Topic is favorited by 1 Pinsider

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23C26391-FBA8-433D-8344-AFB71063B917 (resized).png
U15.png
16027021760958785024335280968500 (resized).jpg

#1 5 days ago

My POTC lights stay on light columns J13 for U15. Lamps 03,11,19,27,35,43,51,59,67 and 75. What is the transistor Stern's part # that I'll need to order. Is it STP20N10? Plus is there a diodes that need to be replaced also. Part # to. Thanks.

16027021760958785024335280968500 (resized).jpg
#3 5 days ago
Quoted from LTG:

Check with Stern tech support if this will work - https://www.greatplainselectronics.com/proddetail.asp?prod=IRL540N and the diode.
LTG : )

Thanks I'll do that. I noticed I left off a letter. STP20N10L

#4 5 days ago

U15.png

VN02N maybe ?

#5 5 days ago

I'm going to check transistor with a mm. If it's good could it need to reflow the solder.

Quoted from zaza:

[quoted image]
VN02N maybe ?

I'll look that up as well. Thanks

#6 5 days ago

The row FETs can be replaced with IRL540.
Column drives are the obsolete and hard to find PentaWatt VN02.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info

#7 5 days ago

Those damn VN02N's! No alternate source for them and I missed out on the last time buy for these.... Real buggers to locate.

Easy to tell the difference at a glance:
20N10L / IRL540 FETS have three legs.
VN02N solid state relays have five legs.

You can see both types in the above photo.

#8 5 days ago

Yes it's the five legged one I need.

#9 5 days ago

It looks like U13 has been replaced once.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info

#10 4 days ago

That's too bad - the FETs would have been much cheaper and easier to find.

What you need is the TO-220-5 (5 pin "Pentawatt") package, full part number = VN02N with no suffix. This part number gets you the TO-220-5 package with the proper pin configuration (3 pins bent forwards, two pins straight down).

If you can find part number VN02N(011Y) - that is the horizontal mount version. You can use this but need to bend all the leads to get it to mount properly - royal pain in the butt.

If you can find part number VN02N(012Y) - that is the vertical mount flat lead version. You can also use this but need to bend three of the leads to get it to mount properly.

Do not buy any of the surface mount versions -- VN02NSP-E, VN02NSPTR-E or VN02NPT-E.

#11 4 days ago
Quoted from G-P-E:

Do not buy any of the surface mount versions -- VN02NSP-E, VN02NSPTR-E or VN02NPT-E.

g-p-e I'm sure you have a good reason for this suggestion. Save me the trouble of doing the investigation. Can one of these parts NOT be "hacked" onto the board?
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact ... for board repairs
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#12 4 days ago
Quoted from ChrisHibler:

g-p-e I'm sure you have a good reason for this suggestion. Save me the trouble of doing the investigation. Can one of these parts NOT be "hacked" onto the board?

Likely not worth the trouble to make it work.

Can always take your chances with these:
ebay.com link

#13 4 days ago
Quoted from ChrisHibler:

g-p-e I'm sure you have a good reason for this suggestion. Save me the trouble of doing the investigation. Can one of these parts NOT be "hacked" onto the board?
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact ... for board repairs
http://www.PinWiki.com - The Place to go for Pinball Repair Info

Yep - they can be hacked onto the board but if he wants a direct replacement - those won't fit.
FWIW - Marco Specialties lists them.
Crapshoot with the ebay parts - might work, might not. Those in the link looked legit, hard to say what you will really get, though.

#14 4 days ago
Quoted from ChrisHibler:

It looks like U13 has been replaced once.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info

Yes I noticed (U13) when I was looking at what one needed to be replaced.

#15 4 days ago

A Hail Mary, does POTC use all 8 columns? I’m thinking swap.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info

#17 3 days ago
Quoted from ChrisHibler:

A Hail Mary, does POTC use all 8 columns? I’m thinking swap.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info

I was going to look into that. Read somewhere that someone removed one from their Metallica column and used it. As of now I can't confirm nor deny. Thanks for the tip

I'll go back and look, fat fingers must have typed wrong item number. Thanks for the link

#18 3 days ago

These are more than likely the same part you can buy on ebay...

#19 3 days ago
Quoted from Pin_Guy:

These are more than likely the same part you can buy on ebay...

Maybe, but I trust Marco a lot more than some random overseas eBay merchant to not only sell genuine parts, but also to actually ship them to me, so the price premium is probably worth it for the peace of mind alone.

#20 3 days ago
Quoted from zaza:

[quoted image]
VN02N maybe ?

I was looking for part STP20N10L, not sure why I thought that was it. VN02N is the correct part I need. Looks like Marco for me. Peace of mind. I did find a place on the west coast, but they wanted 10.50 each after I said I want 25. They have over 5000 in stock and they still have over 5000 in stock. Heading to Marco soon and buy 10.

#21 3 days ago

Good choice. Marco will stand behind their parts if there is a problem.

The 5000 listed on west coast, that might be a 'schlock house'. Curious as to who listed the 5000 parts? I can check a few of their tell-tale parts to see if they are listing legit stuff (not that buying 25 at $10.50 was a good deal).

Edit --
Found them. Real Components at www.realcomponents.com.

A quick look through them indicates that they are selling other people's crap with no regard as to legitimacy.
Tens of thousands of parts popping up for hard to find parts - 6800 series, 6500 series, display drivers.
You search for it and they will have 'something' marked with that number that they will sell you.

... just like ebay

#22 3 days ago

It looks like U15 is the issue.
But it could be the upstream buffer. You’d need a logic probe to verify.

In many years of repairing boards, I’ve never seen a VN02 fail.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info

#23 3 days ago

If you probe U9, a 74HCT273, pins 2, 5 and 6 should behave the same in all lamp test under normal operating conditions. A logic probe is best but a DMM will also provide good info. The pitch of the pins on that part is pretty fine. You may need to use a resistor leg scrap to touch only the desired pin. If the part has failed, then pin 6 will behave differently.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
23C26391-FBA8-433D-8344-AFB71063B917 (resized).png

#24 3 days ago
Quoted from G-P-E:

Good choice. Marco will stand behind their parts if there is a problem.
The 5000 listed on west coast, that might be a 'schlock house'. Curious as to who listed the 5000 parts? I can check a few of their tell-tale parts to see if they are listing legit stuff (not that buying 25 at $10.50 was a good deal).
Edit --
Found them. Real Components at www.realcomponents.com.
A quick look through them indicates that they are selling other people's crap with no regard as to legitimacy.
Tens of thousands of parts popping up for hard to find parts - 6800 series, 6500 series, display drivers.
You search for it and they will have 'something' marked with that number that they will sell you.
... just like ebay

Yes that them, Real Compontents. I made a mistake on price, it was worse. $10.50 each for 50 and $12.50 each for 25. Wished I didn't get in touch with them. Received 3 scam phone calls within 30 mins of giving them my phone #.

Quoted from ChrisHibler:

If you probe U9, a 74HCT273, pins 2, 5 and 6 should behave the same in all lamp test under normal operating conditions. A logic probe is best but a DMM will also provide good info. The pitch of the pins on that part is pretty fine. You may need to use a resistor leg scrap to touch only the desired pin. If the part has failed, then pin 6 will behave differently.

Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
[quoted image]

Thanks for all the help. I've got some other project going on and will get back to this on Monday. Thanks again

#25 2 days ago
Quoted from Thermionic:

Maybe, but I trust Marco a lot more than some random overseas eBay merchant to not only sell genuine parts, but also to actually ship them to me, so the price premium is probably worth it for the peace of mind alone.

I completely understand, and don't blame you at all. I automatically assume all parts from China are counterfeit, but if they work I don't care anymore than the company that can legally manufacture them and chooses not to; for all I know the same part I'm getting from China is coming of the exact same assembly line as the "official" ST part did.

I buy parts for a different reason than the average pin owner as I don't buy parts specifically to fix a single failure on a machine, but to repair boards in the long term so I often bulk buy parts. I've had fairly good luck with the parts coming from China and so far I've had only had one bad lot of 10 CPUs that came in with a 100% fail rate and these were rejected and a full refunded was received. In the past, I've purchased lots of CPUs, ASICs, NVRAM, and IR EPROMS that all tested 100% operable when received; I did purchase a lot of ten VN02N that I linked above and will install 2 of them into a 100% operational board for testing when I receive them, if they both work I will assume all 10 are good; if not, I'll reject the whole lot and get a refund.

Side note: I've purchased 1 WPC CPU from Marco and it was DOA, they did ship me a new one for free right away so that was a win...but the cost of the one part with shipping was the same as buying 10 shipped from China.

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