(Topic ID: 231165)

Transistor # missing on schematics

By topkat

5 years ago



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  • 5 posts
  • 2 Pinsiders participating
  • Latest reply 5 years ago by topkat
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#1 5 years ago

I am replacing a transistor on a blackout.
In the manual it lisits ever transistor numbe except the one I need to replace. My blown one is Q 23. I assumed it followed with all the others Q19,21,25,...etc
I ordered a tip120 that’s 8 amps. The old one says 5..
was it just left off the schematics?

8CC1B5EB-977A-489E-96B7-2281034C8D68 (resized).png8CC1B5EB-977A-489E-96B7-2281034C8D68 (resized).png
#2 5 years ago

Q23 was originally a TIP120, but you should use a TIP102 instead because it's more robust.

#3 5 years ago

Ok thanks
I think i ordered some of those as well

#4 5 years ago

Since you are in the bay area, why not drive over to Jameco Electronics and buy the TIP102 transistors there?

Jameco Electronics
1355 Shoreway Road
Belmont, CA 94002
Phone: 1-800-831-4242
Fax: 1-800-237-6948
Email: [email protected]

Live Agent Phone Hours
Monday - Friday
6:30 am - 5:00 pm PST

Will Call Hours
Monday - Friday
8:00 am - 5:00 pm PST

https://www.jameco.com/z/TIP102-Major-Brands-Transistor-Darlington-NPN-100-Volt-8-Amp-3-Pin-3-Tab-TO-220AB_32977.html

#5 5 years ago

I didn’t even know they are there. Good info for next time
I went online , radio Shack had free shipping over 20$. So I ordered in excess
Thanks for tip

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