Schoolcraft, MI
Same thing happened on my DW, it was C26 though.
https://pinside.com/pinball/forum/topic/dr-who-audio-board-cap-exploded
I replaced all the tantalum caps on the board, and all has been well.
-Brian
(Topic ID: 215046)
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Doctor Who
Bally, 1992
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Quoted from PinPilot:Ok, now I'm a bit confused. It appears that audio board connector J501 brings in 20VAC through pin 1, with a trace that leads directly to the tantalum cap that exploded. My confusion is on the fact that it is my understanding that you never use polarized caps in an AC circuit, only "NP" or non-polarized. But the specs on the tant cap in the manual doesn't have an NP in the specs, making me think its just a normal polarized cap.
Looking at Dumbass's picture, it appears there is a small "+" sign on the right side of the blown cap. This would indicate polarized.
Brian, what exact cap did you buy to do the repair? Can you post a link?
I will try to remember to check exactly what I ordered when I get home from work and let you know. I am pretty sure I ordered tantalum caps from either Mouser or Digi-Key of the specs as the original or slightly upgraded.
-Brian
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