Working on a DB project--my first EM. Playfield switches are working, but there are problems with some score reels not going back to 0 and there is no GI at all. Looking at the paper tags, a friend with EM experience measured voltages at the fuses right next to the transformer and found these puzzles:

Top fused line should be 6V, but meter reads 31.4V
Next fused line down should be 6V, but meter reads 31.5V
Next fused line down should be 24V, but meter reads 12.3V
Bottom fused line is line voltage (110V), and meter reads correctly

Any ideas that would explain the above voltages, and would they have anything to do with the GI issues?

Thanks for the replies! Back to the drawing board soon!

We have GI! Cleaned and adjusted the lock relay, bending a suspicious switch to ensure better contact, and GI came on. Still some troubleshooting, but this is a big move forward. Next step--clean and inspect every switch. Proper testing showed the transformer is just fine. Thanks to Howardr and Newmanjtn for the extremely helpful replies!