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Ah...Another GOOD Find?
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leapinlew:

--- Quote from: FrizzleFried on February 14, 2007, 04:55:29 pm ---Any suggestions on how I may be able to fix this PS as opposed to buying a new one?   $39 for a PS for a cabinet I paid $50 for sort of sucks...but oh well.

--- End quote ---

Thats silly talk. What if I said you could have a working Joust for $89. The fact of the matter is you got a steal - if it cost you another $150 to fix it your still in good shape.
CheffoJeffo:

--- Quote from: FrizzleFried on February 14, 2007, 04:55:29 pm ---Anyone here a Williams Powersupply guru?   What fuse is associated with LED 1?   It seems that is the line to run the PCB,  is that going to be 12vdc?

Any suggestions on how I may be able to fix this PS as opposed to buying a new one?   $39 for a PS for a cabinet I paid $50 for sort of sucks...but oh well.

--- End quote ---

Mike Ranger is the guru, but he doesn't hang out online much anymore and he got rid of all of his Williams stuff (I know because I ended up with it).

LED1 is +5V, I believe (I'm too lazy to go look at mine) .. it should say on the board.

Check your fuses with a multimeter or continuity tester -- visual inspection isn't good enough. Also LEDs do go bad, so you need to use the MM (although it does sound like you are missing +5V).

Also check/clean the fuse holders as they can corrode over time.

Remember that there are reasons why fuses blow, so you need to find the cause or it will continue to blow.

EDIT: Question -- does LED 1 light up with the game boards unplugged from the power supply ?

EDIT2: Check the connectors for possible scorching.

$39 for a reliable, stable power supply ain't a bad deal. And not worrying about blowing your Video, ROM or Sound boards is nice too.

Cheers.
Level42:
How true.....one little thing, you said you tried turning it on with the backdoor open......on a lot of games there's a "safety switch" that turns off the mains as soon as you open the backdoor.....check for that FIRST.....(I fell for it the first time I had a "real" cab as well.....)

A dot on the screen indicates to no deflection horizontal AND vertical on the monitor....
Level42:
bleeehhhhh, I didn't read good enough....you already have some LED's working....forget my posting above....but sometimes the most obvious things are overlooked :D
FrizzleFried:

--- Quote from: Level42 on February 14, 2007, 05:34:23 pm ---How true.....one little thing, you said you tried turning it on with the backdoor open......on a lot of games there's a "safety switch" that turns off the mains as soon as you open the backdoor.....check for that FIRST.....(I fell for it the first time I had a "real" cab as well.....)

A dot on the screen indicates to no deflection horizontal AND vertical on the monitor....

--- End quote ---

Yah,  it has the switch,  which I pulled (of course).   They (the people who sold me the cabinet) said they got a DOT...i get nothing (but if I turn up the screen setting I get an all white screen as I am supposed to get).   I am getting zero power to the PCB...and my marquee isn't lighting up (but that could be a blown bulb...i haven't had a chance to take much anything apart yet.

I found a working Joust powersupply for $15.99...i'd imagine you folks would still recommend the switching PS?

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