(Topic ID: 105354)

Meteor Drop Bank Won't Reset


By CUJO

5 years ago



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  • 75 posts
  • 9 Pinsiders participating
  • Latest reply 3 years ago by Quench
  • Topic is favorited by 1 Pinsider

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  • Meteor Stern Electronics, 1979

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19_LOGIC_PROBE_EISTAR.pdf (PDF preview)
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#32 3 years ago
Quoted from CUJO:

Updated: 12/17/15: Pulled the driver board tonight. Q13 which resets Bank 3 ok ..Continuity test good between center pin of Q13 and connector J5-12. Grounded TAB of transistor Q13 to GROUND for 1/2 sec and Bank 3 resets..
So what is this telling me to replace to get this fixed? Is it really U1?

If you grounded the tab of Q13 and that fired the coil that just tells you that the path to the coil is good. It does not mean that Q13 is good. You need to test Q13 with a MM. Set the MM to diode test and see if you get between .4 and .6 between the outside leg and middle leg. It could still be bad even if it tests good. But if it tests bad then you know its bad. So I would replace that before replacing any chips. If replacing Q13 doesn't work then replace U1.

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