Elf needs food badly...Help w/High Speed

BIGMAC76

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Got a High Speed that needs mucho worko. Current problems I'm having is that the 3rd top flipper isn't working. When I got it no flippers were working, replaced a fuse and got the bottom flippers working. But the 3rd top flipper still isn't working. Here's what I've done:

Reinstalled the Coil that somehow feel down (either during transport or prior?) all the parts seem to work mechanically
Checked all other fuses
DMM continuity seems fine
Reflowed solder joints on coil base and on the button switches
Checked switches - all seem to make good contact

My last ditch is to replace the coil but it's not really showing any burn marks and the flipper works maybe like 4 taps every random 10-20 games and stops working again.

Any help is appreciated. Also if anyone has any plastics for this game, let me know, need about 3-4 random plastics or individual scans?
 
cool will report back, crossing me fingers, thanks.

UPDATE - Yeap seems to be the diode, now need to look up where to get these things, nevermind looks like the shack carries these bad boys, will be buying a few.

Think this may have been the reason for blown fuse?
 
Last edited:
Make sure you put the banded side of the diode to the power side! It might have been replaced before and put in wrong so put the ground on the ground wire *running threw the cab* and touch the red wire to each lead *one at a time* to see which is actually ground and which is the power.

I'm unsure if it can blow a fuse, but I guess it could. The diode is cheap, but I would also test transistor that drives that coil to make sure its not bad/missing.
 
cool will do, yeah I was reading some other posts on RPG about diodes on Williams, seems I'm not the only person having these issues. searched/researched around without the word diode and I never got a hit. thanks again, hopefully I'll have the 3rd flipper working tomorrow.
 
actually don't think it's the diode either now, replaced it and still getting similar readings as before, thinking it may be the connection with the coil itself. the copper/red wiring might not have a good connection? plus now I think i shorted out the right side of the GI lights from being newbish when trying to do something else. i feel like the other guy with the I suck at pinball repair thread. still very green at this and sometimes feel like throwing in the towel. jedi patience...
 
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