All of the controlled lamps on my Medusa suddenly stay on during a game - or at least most of the game. They are slightly dimmer when one and increase in brightness when activated. I know that usually when control lamps stays on it is usually a bad SCR, but would all of the SCRs go bad at the same time? Also, while in game sometimes all of the non-activated controlled lamps will go off and the game plays normal for a while, then all the controlled lamps come back on.
Thanks
Quoted from StratDoc:All of the controlled lamps on my Medusa suddenly stay on during a game - or at least most of the game. They are slightly dimmer when one and increase in brightness when activated. I know that usually when control lamps stays on it is usually a bad SCR, but would all of the SCRs go bad at the same time? Also, while in game sometimes all of the non-activated controlled lamps will go off and the game plays normal for a while, then all the controlled lamps come back on.
Thanks
It could happen if someone shorted solenoid voltage to a specific line of lamps. I've seen a fair share of blown lamp diodes on Bally games. I've also seen someone use a PNP transistor instead of a NPN (or vise versa) and it caused all kinds of weirdness in the circuit.
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Chattanooga, TN