Stardust
Williams, 1971Re: Williams Stardust. When reading the schematic is the position of the components on the schematic the actual order in the game, or are they grouped for convenience?
There is a short in the 24 volt circuit and I want to cut between some coils to isolate where it is.
Quoted from redrock:Re: Williams Stardust. When reading the schematic is the position of the components on the schematic the actual order in the game, or are they grouped for convenience?
There is a short in the 24 volt circuit and I want to cut between some coils to isolate where it is.
Some short finding tips:
First use a circuit breaker instead of fuses to save money.
Disconnect the back box and playfield. Turn the machine on and try to start. If the breaker breaks it's on the bottom board.
Then the back box is connected and repeat
Then the playfield
Once you have it isolated go through the coils and check the resistance. A 0 or super low resistance is a good indicator which to remove from the circuit.
Common bad coils: coin lockout, lock coil, game over relay
Good luck
Quoted from Cheddar:If the breaker breaks it's on the playfield
I know you know better, Cheddar but
redrock might not.
Cheddar meant to say "... it's on the bottom board."
Quoted from Cheddar:use a circuit breaker instead of fuses to save money
http://www.pinwiki.com/wiki/index.php?title=EM_Repair#Electrical_short_troubleshooting_Fuse_helper
Best thing to do is go through the pinrepair stuff, and value the stuff on pinwiki. Isolation as others have said is helpful, but ultimately if you are doing a flip you don't need to do more than fix and play. The more you play, the more the EM will come together. However, if you are doing a full restoration, you need to and ultimately must go over every single item in the game which takes ~40 hours total with PF strip and wax. Its fun, a full week, 7 AM to 3 PM each day for a solid week. You will then not only learn what you must, but also have a game (in most cases) that works, and works right. What isn't right will be obvious and you will live with it or you won't, and order parts from the butt rapers in the business. GL in all things.
Thanks for all your help. I have a circuit breaker instead of the fuse, and have checked all the coils and they are OK. I have isolated the playfield as the issue.
Still, does anybody know about the schematic order of coils; is it reflective of the actual positions?
Quoted from HowardR:I know you know better, cheddar but redrock might not.
cheddar meant to say "... it's on the bottom board."http://www.pinwiki.com/wiki/index.php?title=EM_Repair#Electrical_short_troubleshooting_Fuse_helper
Doh! Thanks for the correction!
Edited the original post. Thanks
Quoted from redrock:Thanks for all your help. I have a circuit breaker instead of the fuse, and have checked all the coils and they are OK. I have isolated the playfield as the issue.
Still, does anybody know about the schematic order of coils; is it reflective of the actual positions?
No it's not. Sometimes similar items are grouped together i.e. score reels or machines with DC slings and bumpers. Otherwise they do whatever makes the schematic easiest to draw.
This may answer your question (wiring diagram vs logic diagram) around 31:15 minutes in ...
https://www.pinballnews.com/shows/expo2007/steveyates.mp3
as well as this...
https://pinside.com/pinball/forum/topic/reading-schematics-how-i-learned-maybe-it-will-help-others
There are other recordings online about reading EM pinball schematics as well.
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