Hey guys, recently picked up a WCS94. Fuze 104 3a SB is blowing. This is solenoids 9-16 I believe.

It blows when I turn the machine on after it boots up.

What I've done to debug:

-Plugged in J127, Unplugged J107, powered on : no blow.
-Plugged J107 In, Unplugged J127 : no blow.
-Measured pin 3 of J107 connector, on OHMS -> got OL . (for all pins on that connector)

Whats weird is after I plugged both connectors back in ... no blow for about 5 minutes of game play (blew once stuff started going crazy in the game - final draw - multiball or something), IT didn't just blow, the whole thing shut off. - whereas last night it was blowing as described above.

Any thoughts?

Thank you

Did you see the edit above where the whole machine restarted?

haha, thanks pin guy. I got my info from the pin up in the back box. I know that for a STTNG it's pin 2 of 105 (saw similar issue on STTNG in forums)

Going to look under playfield tonight with fresh eyes.. Unfortunately, I'm out of 3A-SB fuses :/ plenty of 7a /8a /3a fast acting though .. I actually have 3A-FA fuses in F101,2,3 and 5 because I stole their slow blows for testing F104

Oh it should be noted (which is weird..) is with F104 removed, the trough actually loses power .. But that isn't affiliated with J107 pin 2 or F104 at all, but F105 and J107 pin3 in the diagram above..

So in your theory, would it be true for solenoid #9 in test solenoids to blow F104? Because that happend.

And thank you for your help, Jean-Luc.

So, I took the coil paper off sol #6 and it looks like the coil wiring was split and it was sticking out - shorting the 50vdc. I attempted_ to fix it by sand papering the insolation off and soldered it back to the lugs - after which it had conductivity at both pols of the solenoid .. but still blows the fuse. (though the test sol 1 - 8 DO NOT blow the fuse any more.) So I ordered the sol from pinball life. Will let you guys know it that did the job.

Thanks for the contradicting, humor laden advice

Grant

hey Pin_Guy , in theory, if the solenoid itself is causing the short, I should be able to remove the solenoid, and splice the wires (50+vdc) from the lugs together and it shouldn't blow the fuse right? Figured I'd run this by you before I tried it.