I"m currently chasing a low voltage issue affecting the solenoid expander board and ran across this anomaly. I desoldering and removed br1 and I'm about to do away with this extra rectifier and bridge across the cut trace. But it this some fix for a common flaw I don't know about? Should it be left in place? Or is this the cause of my low voltage issue?

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I'm getting 3.8vdc to feature lamps, insufficient to run the solenoid expander board relay. Outhole kicker and upper target reset too weak with buzzing relay. So if I clip the bridge rectifier out and bridge the cut trace.... And replace br1, I should be good?

I wonder if this rectifier board came out of a different machine e without a SEB and worked with this mod, and was swapped into this machine by someone unaware of the problem?

Well, I undid the extra rectifier and restored the connection across the cut trace and I have 7.2 volts now with no load. Nice bright feature lights and the solenoid expander board is working fine. Now on to figuring out some other weird stuff that's going on.