(Topic ID: 67245)

Stellar Wars freezes when a quarter is added


By Red97

6 years ago



Topic Stats

  • 13 posts
  • 5 Pinsiders participating
  • Latest reply 6 years ago by ChrisHibler
  • No one calls this topic a favorite

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#1 6 years ago

I've got a 77 Williams Stellar Wars, when powered on it goes into attract mood fine. As soon as I add a quarter all lights and score boards freeze and it doesn't show any credits have been added and it wont start a game. once I cycle the power switch everything is normal again until I add a quarter again. anyone have any ideas??

#3 6 years ago

Why don't you have it on free play

#4 6 years ago

thanks for the link, guess ive got some soldering ahead of me.

I like the feel of putting quarters in so all my games are quarter ran.....
I did try free play mode, about half way though the first ball the solenoid fuse blew

#5 6 years ago

Go through Vid's guide... I just got a Stellar up and running (except for strange issue with 5 bank target that I am still working on)...

#6 6 years ago

I'd start by entering switch test, just to see if it will properly react to =any= switches.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#7 6 years ago

Got it to run finally with quarters. But as soon as the lower left bumper is activated the transistor fails and the bumper stays down and the transistor that runs it gets very hot 400 degrees (I checked it). then once the ball drains and the table resets the solenoid fuse blows. ill check into it more tomorrow and run some tests

#8 6 years ago

The pops are "special solenoids" in this vintage WMS game.
Compare the coil resistance to other pop coils.
You don't need to remove the diode...but you should pull the solenoid fuse.

Next up is the TIP-122 (TIP-102 equivalent), and the upstream 74xx circuitry that drives it.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#9 6 years ago

in my schematic its a tip-120, and it goes bad (shorts across all 3 pins of the tip120) after the bumper is fired. I've replaced it twice now.

#10 6 years ago

The diode on the coil is probably open if it blew out the transistor again. Replace coil mounted diode and double check polarity. Wire it like all the other coils are in the game for consistency. Check the coil's resistance too against other similar coils.

#11 6 years ago
Quoted from Red97:

in my schematic its a tip-120

TIP-102/120/121/122 are all interchangeable in a pinball machine.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#12 6 years ago

It was indeed the diode on the coil. thanks for the help guys

#13 6 years ago

Thanks for posting the resolution. We all learn...
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

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