WMS 550 percentage chip

[kayjay]

I have several games for the WMS 550 that I would like to change the percentage on to make them more fun to play. I see the percentages in the configuration setup, but to change them, I'm supposed to have a chip that's installed on the CPU.  1. Does anyone know of a source for this chip? I have scoured eBay and googled under "percentage Chip" and "Odds chip" and "payout chip", for the past week and can't find one.  2. Where, exactly, does this chip install? I have read some old posts on this site that reference the XU10 slot, but I can't find that slot marked on my 1.5 board?  3. Do these chips work on all games using the 1.5 board?

[rickhunter]

XU10 is used in Monopoly top box games.  The XU 27 is where the chip goes.  Here's a post I wrote on how to change the percentage on these machines.  The chips is expensive and hard to find nowadays.  Blueridge had some for sale not too long ago, don't know if he has any left, but expect to pay >$150 for them if you can find one.  I paid around $200 for mine several years ago.

http://newlifegames.net/nlg/index.php?topic=123.msg521#msg521

Image credit to blueridge .