Silverball Mania
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Quoted from vectorman:but when I probe the output connections on J4-1 and J4-2
How much resistance do you measure between ground and each of the individual pins:
J4-1 =
J4-2 =
J4-3 =
J4-4 =
And how much resistance do you measure between:
U11 pin 13 to J4 pin 1 =
U11 pin 12 to J4 pin 2 =
U11 pin 11 to J4 pin 3 =
U11 pin 10 to J4 pin 4 =
Quoted from vectorman:J4-1 = These all fluxuate between 1.5Mohm and 3.0Mohm. Every time I check one of them I get some random reading in this range
J4-2 =
J4-3 =
J4-4 =
Were these measurements taken with the MPU board on the bench or in the game? If it was on the bench, then please plug the MPU board into the game and redo the measurements. Also take the measurements by swapping the meter leads around - you might get different results. Of course the machine needs to be off while doing all this and make sure all connectors are hooked up.
Quoted from vectorman:And how much resistance do you measure between:
U11 pin 13 to J4 pin 1 =472 ohm
U11 pin 12 to J4 pin 2 =465 ohm
U11 pin 11 to J4 pin 3 =472 ohm
U11 pin 10 to J4 pin 4 =470 ohm
These look right.
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Birmingham, AL