Point Pleasant, NJ
Checking the schematics, it looks like both the magnet board and the ripper coil get their 50v supplies from the same source: a violet-yellow wire from J7-pin 3 of the PPB board. Before checking the ripper coil for voltage, I'd first pull out fuse F9 (the fuse for the 50v coil voltage) from the PPB board and check it with your meter. It's a 4 amp slow-blow fuse. Might have blown when the magnets failed or whatever led to the problem.
Since the schematics are kind of hard to follow (in my opinion), i marked the pertinent diagrams to show where I'm getting this info from.
Good luck!
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