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ACE conversion 'Triple Hold' arrived today. I've had the back off. Reel strips are loose and brittle, but I've secured them for now. Reel mech is free; control timer responded to cleaning and oiling. Third reel solenoid doesn't always drop; otherwise game starts & stops as expected. No attempt to pay-out yet. The conversion has involved the loss of the credit counter, which is a disappointment. The token acceptor has been modified to take New Penny, but the 3-way (possibly 4-way) cash one seems to be complete and original. It's probably going to need new reel strips, but the cabinet and artwork are good enough to justify it. More later...

There a good scorpion4 schematics here on the mecca available in downloads. You will have to make a donation towards the running of site (£5) to gain access. You can remove the chips or just cut them carfully if you're going to replace. **Beware IC9 with the sticker is a custom chip that has a logic program on it... don't cut that one! We don't have the program to go on those** As a small bit of advice if you want to repair a scorpion4 you'll have a better chance with 2 or 3 lightly damaged ones and repair all together. I've done a few and they seem to have an aggressive watchdog which shuts the boards down and it's engineering level work to fault find what's wrong with them so having a few to compare really helps. The majority do run after repairs and replace components... but then you have other faults like audio and lamp matrix to sort out sometimes too.