Shadow, The
Bally, 1994You're currently viewing posts by Pinsider Catch86.
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Quoted from SealClubber:The switch is activating fine by the mechanism and is showing continuity when not activated so I guess it is a Normally closed?
Wait. It's normally closed? That doesn't sound right. According to the Switch Matrix it should be open?
Ok so to clarify it in my head, with power off and you measurure resistance across the switch you have an open(infinite resistance) and when you press the target brick wall drop down target it measures a short(0 to a couple of ohms). Is that correct? If it is, did you replace U1 and U3 on the opto board?
Also, whenever replacing the lm339 I put a socket in. You could also see how the opto board works when you engage a different "working switch" to see how the output changes from 3v to a low.
Quoted from SealClubber:With the probes on the switch lugs. One on the diode leg, one on the leg with diode and white wire, I get .3ohms when open and then 45ohms when closed. If I put the probes on the center leg with green wire, and one on the wire &diode leg, I get about 1.9Million Ohms when open and about 1.7Millon ohms when closed.
Sorry, I can't visualize this. Can you take a pic maybe? Also, you could use another switch as a comparison such as the "battle drop down" switch? Measure that the same way as the other switch. Do they measure the same way?
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Thornton, CO