Williams World Cup (1978) restoration

[ddstoys]

You should still be seeing voltages on the board the missing rectifier will be for the coil voltage from memory.

  Here is the photo i can email you the full sized one if you like 

[infinite1977]

Yeah I dont seem to get anything on my Multi meter on the 5v.

I might get you to email me that full size pic if you can. The colors on my machine a little different also, but I will try and follow the wires. I actually found the wiring diagrams also so I will try and use them as a guide.

[FirePower]

You might need the rectifier ground to get the 5V section up and running, depends on how the board is wired.

1. Measure the voltage on pins 10 and 11 on 3J1, the 12 pin plug (meter set to ac). You should get 18V ac between these.  Do you?

2. If this is so now measure voltage on fuse F5, (meter set to dc, red lead on fuse, black lead on negative lead of the large 12,000uF cap) should be 11V dc. Doyou?

3. If you get these, measure between 3J5-6 and neg lead on capacitor in step 2. Should get 5V dc. Do you?

Let us know the answers.

Out of interest can you use the meter to measure a battery, say car or mobile phone, voltage? This will test the meter and your use of it.

[infinite1977]

I will do the test Dave. This is literally the first time I am using a multi meter hence why I have asked for people to dumb it down for me:P

[infinite1977]

You might need the rectifier ground to get the 5V section up and running, depends on how the board is wired.

1. Measure the voltage on pins 10 and 11 on 3J1, the 12 pin plug (meter set to ac). You should get 18V ac between these.  Do you?

2. If this is so now measure voltage on fuse F5, (meter set to dc, red lead on fuse, black lead on negative lead of the large 12,000uF cap) should be 11V dc. Doyou?

3. If you get these, measure between 3J5-6 and neg lead on capacitor in step 2. Should get 5V dc. Do you?

Let us know the answers.

Dave , do you want me to turn the machine on and measure the pins on the plug?

Out of interest can you use the meter to measure a battery, say car or mobile phone, voltage? This will test the meter and your use of it.

[infinite1977]

P.S tested meter on a AA battery and got 1.6v so the meter works

[infinite1977]

Ok big day yesterday. Stripped play field with a fellow member, cleaned cabinet and soaked posts in warm water and windex as suggest by Daniel. Parts cleaned up a treat and the play field came up ok after one application of Novus. Will give it another going over today. Also sprayed the back glass with Tripple thick to stop flaking and that has worked a treat also. (Thanks Nino). Here are some pics, more to come.

[infinite1977]

some more pics

[infinite1977]

Some more pics:)

[MartyJ]

Awesome work.  That playfield and cabinet has come up a treat!  Well done 

[infinite1977]

Finally starting to take shape. I cant take all the credit, I have had help
 

[MartyJ]

Finally starting to take shape. I cant take all the credit, I have had help
 

Nino is an excellent person to learn from.  But on your next pin, you'll be doing more and more by yourself.  Everyone starts out like this!

[FirePower]

I should have said this first, but make sure that the pin is on a circuit with a rcd / earth leakage protection.  This is pretty good advise for any of us who fiddle inside pins.  If the house doesn't have them in the switchboard get a portable plug in one to protect yourself.  They cost next to nothing and may save your life, particularly if your not entirely sure of what you're touching.  Seriously there is enough voltage within the cabinet to kill, so please take this warning and advice very seriously.

Good to hear the meter and you are working.

You can probably get the meter probes into the 3P1 plug from the back with it still plugged in. If not remove it from the board and then measure.

After I wrote this stuff yesterday I was thinking that since you are going to need a new bridge rectifier you may as well buy it and install it now. They can be bought at Jaycar part ZR1324 for $5.95. Look at the one you've got and see how it is wired up. The one pin that is set out of alignment to the others, with the nick on the bridge corner, is the positive; it will go to the psu board via 3P1. The two pins on either side of the positive are the ac in from the transformer and the other terminal is the negative to plug 3P2.

The playfield is looking really good.

[ddstoys]

Looking good George thats coming up great. 

[Homepin]

It looks excellent! Where did you get the triple thick from? I need to do my Winner glass.