Gorgar
Williams, 1979You're currently viewing posts by Pinsider pb456.
Click here to go back to viewing the entire thread.
I have this exact same issue - double flippers mid game causing reset, can start new game with start button (it's in free play). Have updated PSU per Vid1900 bulletproofing doc. I will check my 5V. I will also check the diodes on the coils for my flippers.
Rottendog MPU327 MPU board by the way. Has worked really well for a long time.
Any other advice?
Thanks for this post Yoko2una
Quoted from frunch:It sounds like the 5v DC is getting too low, as zacaj mentioned above. I found another thread for a Williams system 4 game (very similar to system 6, used in Gorgar)...relevant comment:
I found what was causing the mpu reset. 5.05 volts was coming out of the power supply. We measured the voltage at the pin connector on the power supply and it was lower. We measured it at several places on the mpu and it was as low as 4.74 volts. We re-soldered the connections on the back of the power supply for the 5 volt connector. The voltage improved. We did the same on the mpu and now it is getting 4.96 volts and works perfectly.
Here's the thread that post came from: https://pinside.com/pinball/forum/topic/williams-system-4-5-volt-low#post-4593333
Where would I get new connectors for the PSU? I have a Rottendog MPU327 so I will check but unlikely the connectors there are bad. I have an original PSU that I reworked via VID1900's post. Also of course did the 8A 250V fuses on the bridge rectifiers.
Quoted from PoBoyPinball:Recap your power supply. I just had this same issue William system 6 game. Recaped the power supply and all is good.
That's been done. Capacitors, diodes, resistors, I think even a transistor or two per Vid1900's guide.
Quoted from cody_chunn:This is what fixed mine
https://pinside.com/pinball/forum/topic/gorgar-resets-wboth-flippers
Thanks for that! Did you put the 8A fuses inbetween the inputs on your bridge rectifiers as suggested by the bulletproofing doc?
Quoted from cody_chunn:I don't think I got around to doing it on GG, but I did on the WC.
https://images.pinside.com/f/2b/f2bf4989ef47dfe95a402231211f1020eb59bde4/resized/large/f2bf4989ef47dfe95a402231211f1020eb59bde4.jpg
Looks like I got the same fuse holders as you. I've done my Blackout and Black Knight like that, have yet to do the others. Hope this will keep them for another fourty years!
You're currently viewing posts by Pinsider pb456.
Click here to go back to viewing the entire thread.
Wanna join the discussion? Please sign in to reply to this topic.
Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!
This page was printed from https://pinside.com/pinball/forum/topic/gorgar-need-help-double-flip-reset?tu=pb456 and we tried optimising it for printing. Some page elements may have been deliberately hidden.
Scan the QR code on the left to jump to the URL this document was printed from.
Anchorage, AK
