Williams World Cup (1978) restoration

[infinite1977]

Homepin I don't want to offend anyone on here so I might not necessarily post who I got it from as it was from another pinball parts seller. I will pm you who I got it from, but that should let everyone else know almost who I got it from hehe, as I was in a hurry for it and could not find it anywhere. Hopefully my mate Jarod is not reading this hehe or he will not come over and help out any more :)

[infinite1977]

Ok got the recifier, but am a little confused as I may have mis read wiring diagrams.

The retifier has + and AC (Top line) and AC - as the bottom two.

I have 1 black cable coming from the J6 plug and 3 cables coming from the back of the transformer. 1 purple and 2 black ones.

Where to from here? Where should the cable from the J6 plug go into? And I am assuming the purple one is significant also.

Cheers

[ddstoys]

The ones from J6 will be your + and -    the ones from your transformer will be the AC 

[ddstoys]

I also have a present here for you george ill post a photo once i find the other one that ive lost 

[FirePower]

Study that wiring diagram.  The plug and the pin number within the plug will tell you where the wire should go (same as what Daniel says) .  Trace out each wire, it will tell you a lot. From the transformer you should only have two spare wires with spade connectors (the sort that fit the bridge) - you'll have four spade terminated wires all up, but two of them are on you existing bridge.  Again have a look at the wiring diagram - can't stress how important / invaluable it is, a picture and a thousand words and all that.  On the one bridge you have in place measure the ac voltage, it'll either be 13 or 25 volts, the other two wires with spades from the transformer will have to be the other ac voltage going to the other bridge.

Also have read of the Marvin WMS repair guide - has a good section on power supply testing.

[infinite1977]

Thanks for that, this is what is confusing me, I actually have three wires with the spade connectors coming from the power supply. I have attached another pic.

The other rectifier has all it's connectors so something is not quite right

[infinite1977]

Sorry about this, but mentioned there should be two from the j6 plug. The other one is going to the capacitor in the picture.

[infinite1977]

I think I found the wiring solution and do get voltage on the board, but I noticed that the large Silver capacitor is leaking from the top and started sparking. does this mean it needs replacing?

[ajlaird]

I think I found the wiring solution and do get voltage on the board, but I noticed that the large Silver capacitor is leaking from the top and started sparking. does this mean it needs replacing?

It probably does now! It is possible that it is an electrolytic capacitor and that the polarity was reversed causing above symptoms.

[infinite1977]

Ok boards have been re conditioned and returned. Machine is ready to be turned on, but just a little hesitant until I get the rectifier issue sorted.

[ddstoys]

Please make sure all the voltages coming from the boards are correct before turning it on with the new boards attached if its not working properly you can cook your boards

[infinite1977]

Yeah I know. Will trying to get someone here to look it over first

[infinite1977]

As I was digging around I found a playfield mylar lying around. I am thinking about putting it on. I take it I just put in on then cut out the wholes etc after woods, is that right?

[MartyJ]

If there is no massive wear on the playfield I'd leave it off.  Its very difficult to put it on with bits cutout and if you end up with a crease it will impact on ball play.  Try to lift it and you will lift paint.

Keep the playfield clean and waxed you should be fine.

[Strangeways]

Yeah I know. Will trying to get someone here to look it over first

Mate - should have the time over this weekend. I'll have a quick look over it for you. Will cost you a couple of coldies