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(Topic ID: 65424)

Genie issue, Pascal board


By adalogue

7 years ago



Topic Stats

  • 10 posts
  • 5 Pinsiders participating
  • Latest reply 4 years ago by adalogue
  • Topic is favorited by 5 Pinsiders

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#8 4 years ago

I had a bad coil in my <coincidentally> Genie blow a transistor in a Pascal board that I put in to test it.
It would come up with an "outhole is stuck on"
In my case: fried either the transistor (Q2) or the transil diode (DTOH) on the PI-1 X4.
Q2 is a BDW93C
DTOH is a transil diode P6KE62A
Newer pascal boards come with spares.
Some diagnostic info I got from Pascal:
to measure a NPN transistor (on the schematics, the arrows run from base to
emitter) :
examples: BDW93C, TIP122, BC547, 2N3055, BD241, TIP31, MPSA13, MPSU45,
2N6043..
- red tip on B, black tip on E : readout 0.5 to 0.7V OK
- red tip on B, black tip on E : readout 0.5 to 0.7V OK
- red tip on C, black tip on E : readout "0" (open circuit) OK

So check those transistors.

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