Quote:
Originally Posted by rrflorida
The u102 transistor (circled in red) measures 7.3k Ohms middle to right leg, and 100 Ohms middle to left leg.
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Good find.
But left leg is the input, so 100 Ohms is not necessarily a problem.
That said, see what voltage is coming to the left leg of U102 (with respect to ground) and what voltage it is outputting on its right leg (again, with respect to ground).
Also, could you please tell us what part number is written on U102?