(Topic ID: 260999)

Centipede Assist Please

By GPS

4 years ago



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  • 7 posts
  • 4 Pinsiders participating
  • Latest reply 4 years ago by GPS
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#1 4 years ago

Hello Fellas
Anyone out there have any experience that they can share regarding the rebuilding of the audio/power supply board?

Specifically, there are three transistors that are affixed to the “top and bottom” of the heat sink. Two of these appear to have the mica insulator while one does not. Should they all be electrically isolated? Don’t want to frick it up rather bullet proof it for another 40 years.

Thanks in advance

G

#2 4 years ago

Wrong forum, head over to klov masters of vids will guide you.
Harley D.

#3 4 years ago

I can look at mine tomorrow for you. Im in bed and my eyes are shot or id do it now for you.

#4 4 years ago

Is your game working as is? if so leave it, there is no point in rebuilding the A/RII if it isnt giving you any issues at this point. When the caps dry out out buy a full rebuild kit on arcadepartsandrepair and do it all at once.

#5 4 years ago

Did some further reading. Went and posted over at KLOV as well and a kind user by the screen name of andrewb responded and suggested that I read some of his posts on this subject as apparently he (andrewb) is well reagrded in this area. So, the bottom line according to andrewb at KLOV is that the main component that does the bulk of the "heavy lifting" on the board is the 2N3022 transistor. This is really the only component that he suggests replacing. Leave everything else alone provided that it is still ok. The bullet proofing seems to be limited to replacing this one transistor which if it goes bad can and probably will damage the game board. Hopefully this is helpful to others

#6 4 years ago

Some do some dont idk why they do appear original.

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#7 4 years ago

Thank you. Appreciate the follow up. I communicated with a guy with the screen name of Andrewb on klov and he advised that the only component that one needs to worry about on these circuit boards is the 2N3055 transistor that is in the middle of the heat sink. Leave all else alone. No need to mess with it. I am good with that. Seems to have a great repuatation on klov. So main transistor replaced and board cleaned up and back together it goes. Thanks again

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