Author Topic: Williams World Cup (1978) restoration  (Read 3023 times)

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Offline FirePower

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Re: Williams World Cup (1978) restoration
« Reply #75 on: January 26, 2010, 10:38:02 PM »
Power supply board was missing two diodes hence no 5v. This is being rectified.



That is an absolutely shocking pun.


Transformer still smells. Is this normal? Is there something that should be checked. It is reading a little high in it's voltage. Pumping through 250v. Reading some note that were made reading 29vac as opposed to 25.5vac.

Last issue solenoid is reading way too high 38v dc as opposed to 28v dc. Any suggestions?


Two thoughts;
  • Firstly you have nothing connected up - which is the correct thing to do as the first tests and you would expect the no load voltages to be a bit higher.
  • Secondly the transformer has a facility to allow it to be wired up for low (105 or 210V) input voltage conditions, you need to make sure it's not in this configuration. This is described on the power wiring diagram and  involves making different connections on the transformer.