(Topic ID: 262018)
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Quoted from Jmckune:Grumpy, this isn’t my issue but just making sure I understand, he needs to swap the position of the white wire with the blue/yellow?
There is a couple of things that need to be done here. The diode is rated for 1 amp. I'm sure the flipper fuse that burnt was at least 3 or 4 amps. So the diode will have to be replaced on both coils. I would install the diode cathode side (band) to the lug with the thicker or primary winding. Also install the power wire to this lug too. The middle lug always gets one of the EOS wires. The last lug which has the thinner winding wire or secondary winding gets the other EOS switch wire and the ground wire. If your not sure which wire is which, the ground wire will be the same color as on the flipper switch.
Quoted from GRUMPY:There is a couple of things that need to be done here. The diode is rated for 1 amp. I'm sure the flipper fuse that burnt was at least 3 or 4 amps. So the diode will have to be replaced on both coils.
Since you have 3 system 11 games you need to keep some diodes on hand, if you buy 1n4007 diodes you can use them on coils, switches, lamps and circuit boards.
50 volts goes to the white wire.
EOS switch wire to the middle.
EOS switch wire and wire that goes to the cabinet switch to the left lug.
Quoted from Icebear1372:What else could possibly be going on?
Start from scratch, disconnect the blue/yellow and the grey/yellow wires. Replace the fuse, turn on the power and test for voltage at both wires with a DMM.
Quoted from Icebear1372:Okay. I did that. I disconnected the grey and yellow and the blue and yellow wires from the coils. I then turned on the machine and the fuse popped even with the wires disconnected.
I think when you had the short across the diodes the you damaged the flipper power supply.
You need the test the bridge rectifier on the flipper power supply. I bet that there is a shorted diode in the bridge rectifier.
You are going to need this.
https://www.greatplainselectronics.com/proddetail.asp?prod=GBPC3504W
Quoted from Icebear1372:Do I need to go back through the coils when I replace the bridge?
No, you never sent power to the flippers because the short this time was on the power supply and not the coil.
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