| Electronics > Beginners |
| FMMT597 transistor not working |
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| Zero999:
Dough, I wanted him to figure out the correct places for the collector and emitter connections. |
| CJay:
Ooops.... |O 'Left as an exercise for the reader' |
| Chris Hasler:
Didn't realise that the schematic would be wrong as its a rework of a through hole board to smd. So the next question is how did it work on the last 2 board revisions? I will have to work out if the boards are salvageable. |
| Zero999:
One possibility is the footprints for the transistors, on the previous board revisions, had their collector and emitter connections reversed, so it worked. |
| CJay:
--- Quote from: Hero999 on July 13, 2018, 01:50:40 pm ---One possibility is the footprints for the transistors, on the previous board revisions, had their collector and emitter connections reversed, so it worked. --- End quote --- Or if the last boards were through hole the transistors might just have been fitted bass ackwards and the schematic has never been correct... |
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