This is too weird. Buying a new battery for my meter tomorrow to rule that out. Will post here if any measurements change.
Thank you to all who have tried to help so far!
Thank you to all who have tried to help so far!
Pinball info
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Williams system 11C Power board. Help needed.
- Thread starter Cai Remrod
- Start date
OK, so there is a ground issue - if there is no voltage between TP2 and ground it probably isn't the cause of your issues. Would be good to fix that though. Can you measure the voltage drop across the BR leads when on? Do you have an oscilloscope? Don't get where the missing 12 V go. Assume you don't have another board you could test with?
No scope or other board. :-(
Measure BR. Do you mean on + and - legs?
Have not taken off 1 leg on C9 yet. And would it be an idea to disconnect - leg on BR and see if the output is stable?
Measure BR. Do you mean on + and - legs?
Have not taken off 1 leg on C9 yet. And would it be an idea to disconnect - leg on BR and see if the output is stable?
+/- to both AC legs AC/DC. C9 is the only thing which could pull it down otherwise.
it’s deffo c9 unless your board has a short somewhere. are you really sure c9 is ok and wired up the right way. ? post a pic
Ok. Will get on it tomorrow. Have just got home and want to sit down with a cold beer and watch Brazil playing now. Been a long day.
Did you manage to find a solution for this?
No. Havent been out in the garage. got a really bad cold and cant face working on the machine atm. Getting a load of hassle from the wife as the agreement of buying another car(convertible for the summer) was that I clear out the garage of some machines so the car can be stored there during winter. Hopefully I will be better by the weekend but chances of having cleared the garage by christmas looks remote. Merry christmas to me.
(Well, at least I got my convertible as an early christmas present, win! 
)Its been down for around 9 months and having looked at it again, I have no strength to carry on. So I thought I see if anyone here want the machine, as is. Cosmetically its very good, with only 1 centre plastic broken. Its a diamond plate playfield so no wear except a little around the vuk. Its got. Brand new display board installed. Comes with original manual and keys. £700 takes it away. Let me know if interested.
