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(Topic ID: 235212)

Trying to understand this old transistor repair

By ktownhero

5 years ago


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  • 11 posts
  • 8 Pinsiders participating
  • Latest reply 5 years ago by 2manypins
  • No one calls this topic a favorite

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#1 5 years ago
OP
 
SQL

ktownhero

Inactive member

6y 37,050 453 4

I'm in the midst of restoring my first machine: a System 11 JOKERZ!. The board has some old repairs that I would like to clean up. Im not entirely clear on what is going on with this transistor. I would appreciate any input on the proper way to clean this up nicely. It looks like the middle lead is attaching to a trace on the back and the other two are attaching to traces on the front.

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#2 5 years ago
 
RUS

russdx

Pinside member

8y 60,800 2,084 5

looks like the original pads have blown out or been accidentally removed in previous repair. They have simply scratched off some solder resist and soldered directly to the trace hehe.

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#3 5 years ago
 
ACE

pinzrfun

Pinside+ Frequent

US Belleville, MI

11y 90,300 4,304 20

if its still working, i wouldn't touch it.....

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#4 5 years ago
OP
 
SQL

ktownhero

Inactive member

6y 37,050 453 4

It just kinda looks like shit and if I resell this I don't like the idea of leaving it like that.

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#5 5 years ago
 
EDE

pinball_ric

Pinside+ Frequent

US Cedar Park, TX

6y 58,550 565 16

Since the pads are gone there's nothing you can do to make that not look like shit. I'd leave it alone if it's working.

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#6 5 years ago
 
NYB

BethlehemBill

Pinside member

10y 35,050 29

Here's my Jokerz Q31. Yours looks pretty good!

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#7 5 years ago
 
NYB

BethlehemBill

Pinside member

10y 35,050 29

And here is the fix!

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#8 5 years ago
 
GPE

G-P-E

GPE

US Omaha, NE

13y 76,800 2,778 4

EEEEEEEK!

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#9 5 years ago
OP
 
SQL

ktownhero

Inactive member

6y 37,050 453 4

Quoted from BethlehemBill:

Here's my Jokerz Q31. Yours looks pretty good!
[quoted image]

Wow, that's crazy. Is there something up specifically with Q31?

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#10 5 years ago
 
ERW

chuckwurt

Pincinnati

10y 193K 31,330 16 13

I agree. If it works, leave it.

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#11 5 years ago
 
KSN

2manypins

Pinside+ Addict

US Hanover, VA

12y 80,800 2,002 7

Quoted from BethlehemBill:

Here's my Jokerz Q31. Yours looks pretty good!
[quoted image]

That is too funny! Thanks for the laugh this sunday morning. Glad both of your machines are still working.

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