Good Afternoon Everyone,
I have a GI circuit out on my Shadow, I have continuity from the board to where it makes connection under the playfield, but when I put a meter on it I'm only getting 2 volts. All other GI circuits are working as they should. Anything particular I should be looking out for?
Thanks,
Joe
Thanks Lloyd - so here's what I know: I have 2v ac across that line (wht/vio and vio) at the pins on J121 and at the first lamp in that string of GI. I pulled the board, tested the traces for resistance and continuity on that circuit, no issue. The other GI strings on the same plug (J121) have a solid 6.8V. Leaky transistor maybe?
Quoted from JKirby:Leaky transistor maybe?
Gut feeling is not the transistor.
You have good AC going to the lower left side of the board on each pin ?
You tested traces - how is your through hole continuity doing ?
Just for craps and grins. I'd reflow the solder on the pin for AC to the board for that line and for that line leaving the board.
LTG : )
Check your incoming voltages. Most likely suspect is the big connector coming off the transformer with the yellow wires that leads to J-115. Disconnect and inspect for burnt pins.
Also inspect connector J-115 on driver board. If no burnt pins or connector, measure incoming voltages at J-115. The triacs used in the GI circuits rarely fail.
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Hopkins, MN