(Topic ID: 180997)

Rectifier Bally paragon

By StratDoc

7 years ago


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  • 210 posts
  • 7 Pinsiders participating
  • Latest reply 7 years ago by Quench
  • Topic is favorited by 10 Pinsiders

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#69 7 years ago
Quoted from StratDoc:

Yes, tp5 registers correctly.

and this comment --

I have voltage a c23 and c24. Nothing on the other side of q20. It is a brand new transistor and continuity checks out okay and it does not test that is is shorted to the heat sink.

These both suggest 12V coming into board but not getting to Q20. No voltage on either side of Q20 --> broken trace or no connection to Vin pin of Q20.
I believe this is where Mk1Mod0 was going with posts #64 - 66.

#75 7 years ago

Q21, Q22 and Q23 are part of the high voltage circuit. Ignore those until you get the +5V running.

Q20 -- only thing that will work there is a variation of a 323 type TO-3 package regulator. Q20 is actually an integrated circuit, not a transistor.

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