jumper on WMS Defender PS - should that be there?

vintagegamer

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I'm guessing no..

But if it IS supposed to be there, the end on the right side of the pic isn't attached. The location of that pic is near 4J1 on the Williams PS board.

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I'd wondered that- so I should resolder that connection on the right side I assume?

If this is being used in a cocktail table, then yes. IIRC, this only affects the voltage for coin door or start lights.
Also check the manual and make sure you're using the correct lamps in your cocktail.
 
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Well I resoldered this jumper today and the lights went out again after a short period of time so I guess I am going to wait until the Bob Roberts kit arrives to see if it resolves any of the fuse blow-light out issues. :(
 
I would've thought the lights were powered off the isolation transformer, not the power supply. interesting.
 
I would've thought the lights were powered off the isolation transformer, not the power supply. interesting.

They are.......the 6 volt (approximate) tap exits the transformer, enters the power supply board, goes through a fuse, then the resistor/jumper in question, exits the power supply board, and heads to it's destination.

My guess to the OP......you've got a bad header/connector issue.....or a (or a couple) crappy lamp sockets causing a short.

Edward
 
They are.......the 6 volt (approximate) tap exits the transformer, enters the power supply board, goes through a fuse, then the resistor/jumper in question, exits the power supply board, and heads to it's destination.

My guess to the OP......you've got a bad header/connector issue.....or a (or a couple) crappy lamp sockets causing a short.

Edward

Yes, I don't think anything in his kit will help this except maybe the replacement connectors pins. Unless his kit includes new headers, which are really terrible on the Williams PS (round and thin) and should be upgraded.
 
They are.......the 6 volt (approximate) tap exits the transformer, enters the power supply board, goes through a fuse, then the resistor/jumper in question, exits the power supply board, and heads to it's destination.

My guess to the OP......you've got a bad header/connector issue.....or a (or a couple) crappy lamp sockets causing a short.

Edward

Has this voltage been measured with and without the jumper?

Just a thought
 
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