The restoration of a 1980's Williams Defender arcade machine
Archive for October, 2013
![](https://www.thedefenderproject.com/wp-content/uploads/2013/10/2012-04-15-14.00.06-64x64.jpg)
Power Supply Rebuild: Installing a new 230V Power Filter, Varistor and Fuse
Oct 28th
So I did this part of the power supply rebuild a while ago, but never really documented “how” I did it, so thought adding this would be informative to complete the loop on what you need to do. Here’s the existing power filter and varistor as it arrived from the US: Power Filter = grey…
![](https://www.thedefenderproject.com/wp-content/uploads/2013/10/DefenderLightWorking-64x64.jpg)
Converting the Neon marquee light for UK voltages
Oct 27th
So it turns out that not only are the US Williams machines of course rigged for 110V, but also the 110V they use has a different Hertz cycle from the 230V we use in the UK. UK 230V runs at 50Hz and the US 110V runs at 60Hz, so even with our Transformer doing the…
![](https://www.thedefenderproject.com/wp-content/uploads/2013/10/2012-04-30-18.09.51-64x64.jpg)
Power Supply Rebuild: converting the wiring harness for 240v rather than 110v
Oct 27th
I forgot to document the key part of the conversion process of taking a US Williams machine and converting it from 110V to 240V is that a jumper wire in the wiring harness needs to be moved and another removed to supply difference voltages to the transformer. Below is the default US wiring of the…
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