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I hate to hear folks wholesale swapping caps when a game is performing fine. I really hate repairing what we’re nice boards before someone ripped all the through holes removing the OEM snapcaps.
Not advised. This isn’t a CRT monitor.
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Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://www.PinWiki.com - The new place for pinball repair info
Quoted from Risingjay1:I just know from experience that gear that is almost 30 years old typically need a refreshing. I by NO means am an expert with pins so I will take your advice. Thanks for the replies.
We hear that often. Electrolytics do have a life expectancy. It's a matter of how critical that 100% peak performance from the cap is. On WPC-089 power/driver boards, the only caps that are really critical are C4 (100uf/25v) and C5 (15000uf/35V). Both of these caps are in the 5VDC power circuit and have been indicted for "reset" issues. I also routinely change C2 (100uf/25V) which is in the regulated 12V circuit. It sometimes leaks, takes out the traces, and 12VR is lost.
Caps C6/C7 for example, are in the lamp matrix power circuit, both 15,000uf caps. They serve the same purpose as the 30,000uf cap systems of old used. No one =ever= changes/changed that cap. It wasn't necessary then and it's not necessary now.
My apologies if you're experienced with PCB work and especially removing snap caps. I just see too many boards that become completely hacked by newbies. Pinball...where "if it ain't broken, don't fix it" is 100% valid.
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Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info
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Chesterfield, MO