I have a couple WMS video cpu boards that have the "piggy back" add ons to the PCBA slot cpu. The boards were pulled from working WMS 550's. I am changing the games....(using the same number of eproms... XU2,3 17, 18, 30, 31 all 8 megs) in the initial Ram Clear I get a "squeal" and 2 bongs. Clear screen / pick the denom
shows up... but no "click" sound when picking denom etc... Pull out the Ram Clear chip.... put in the XU2.... Restart gives me, again, 2 bongs... I can go to
configure...set that up... and will go into game.... However... I'm getting only partial sounds and the "game play" is slow and has delayed and erratic action and erratic sound. Re-checked eproms / checksum... all OK. I have also tried to put the original game eproms back in the machine and it cleared properly... I came across another WMS that had the "piggy back" boards 4 months ago...and could change out the games with no problems... I'm also not having any problem changing games with the 1.5+ CPU's.
Any ideas ? ? Thanks. cp
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Reply #1 on: 01-06-2010, 18:03:05 »
Check your jumper by the sound chips, position JP3. I'm thinking your old game sound chips may have been 4 megs. There are a few game titles for the 550 that do have 4 meg sound chips
Pokernut
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Reply #6 on: 01-06-2010, 20:23:26 »
According to WMS manual- 2 startup bongs= Bad XU-30 on CPU board. Remedy= Replace with good XU-30, Clear Ram and retest game. Also verify sound jumpers for correct eprom size.
Dan (tacman)
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Reply #7 on: 02-06-2010, 02:24:18 »
Chris, look underneath the Video Adapter (where the monitor cable plugs in) there are either 2 or 4 surface mount ram chips on that board, if 2 that is your problem, if 4 then forget what I said, you can see it without removing, older games like Mon 2 Burn and Who Dunnit don't need much, but the newer games won't work, I see everybody selling any WMS board they can dig out now, but many won't work, they were Poker or early Slot games, I can take some pics and show you if you need me to.
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