Hello Pinside Folks!

I'll try to keep this basic. Been rebuilding parts of my JP and recently the right lower flipper was getting twitchy and intermittent. Figured I might as well replace the coil, it looked old and unwound a bit. Throw the new coil on and it blew up the flipper board. Ended up replacing R4 (toast) and R3 and D1 which were "blackened". Without the right coil in I plugged it all back in and it works. I did find that either a fuse was blown already (or blew in this process) and that several of the fuses on the flipper board were the wrong rating. I replaced them all with new 3A slo-blo and fuse F1 blows as soon as the game powers up.

I did find the info here: http://www.pinrepair.com/de/index3.htm#factory about the wire shorting on the upper right flipper. I did a cursory search and didn't see anything wrong. Any troubleshooting steps I can take to track down the issue? Now I am assuming the coil was not really bad or going bad but maybe a short is what caused the flipper issues and is what is blowing the fuse now?

Any help is appreciated!

Thank you very much!

I posted some specific pics here: http://groups.google.com/group/rec.games.pinball/browse_thread/thread/688d6745c7be7cf5/5fdb3b232e4f748b#5fdb3b232e4f748b

Should be the last post and I'm pretty sure I followed the proper alignment. Possibly originally I had it backwards, hard to say now, so that could be what caused the issue.

Would you mind expanding on the specifics of a few items:

- I assume the "4093" chips are the 3 black microchip looking items with a 4093 in the number on top? Can you tell me how I know if those are bad or what to replace them with specifically (link to part)?

- What would be the procedure for checking the diodes and transistors? Do I need to unsolder all of them to manually test with my DMM?

- I read a bit about testing transistors but don't know exactly what to look for. Not sure what "type" of transistor it is and which legs are which.

- Are the rectifiers the items with the heat syncs on them? How would I check those?

Thanks!!

Quick update... found out that the TIP36C transistor was dead too. On order, that might be the whole issue.