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Flippers.com 
Allied Leisure Industries (ALI) pinball games - Troubleshooting and Information (as of July 4, 2008 ) ALI manufactured a number of pinball games all based on one MPU (Central Computer) board as shown below (MPU Version 2). The MPU was powered by a single +5VDC power supply usually located on the bottom of the cabinet. (see below), and you want to make sure it does produce 5VDC (+/- 0.25VDC) at the MPU. You can measure the 5VDC at the filter capacitor mounted on the lower left side of the MPU board (just below the three plastic plugs Green/White/Red on the far lower right of the MPU). The pinball games made using this MPU (the features - lights, switches and coils - were re-arranged by ALI to change the rules for each game) include: DISCO 79 (c/t), EROS ONE (c/t), HEARTS & SPADES (c/t), HOE DOWN (u/r), ROY CLARK/THE ENTERTAINER (c/t), STAR SHOOTER (c/t), TAKE FIVE (c/t), THUNDERBOLT (u/r), and GETAWAY (u/r). u/r = standard upright pinball. c/t = cocktail style pinball. And now new fuse holders...
You can use an ALI 4 player board in a two player cocktail - the cabinet has a jumper to tell the board to be in either two or four player mode. There are two versions of the ALI single board MPUs. The first version is recognizable by a collection of resistors along the bottom edge by the middle edge connector. These are 'keep-alive' resistors that are supposed to reduce the failure rate of the light bulbs. These resistors and the extra connector were dropped after game serial #282674. The first version MPU with the extra resistors also has an extra active (but unused) connector on the upper left edge of the MPU and that connector and the keep-alive resistors show up only on the revsion 1 MPU schematic. In both revisions of the MPU the three 6530's are the same three part numbers, however these 6530s (-09(IC5) , -10(IC6), and -11(IC3)) have to be in their correct sockets or the board can not work!. I am again working on replacements for these - have the design worked out, now am going to run off the circuit board to test. Should have results by the summer...note that the Bally Home Model Pinball games did NOT use the 6530 and this will NOT work for them. That will have to be a separate project - unlikely that I will attempt it as the payback is even worse than the time invested in the replacement 6530 RAM/ROM/I-O/Timer project. Note that 6520 is identitcal to 6820 or 6821 and can be replaced with either, although the 6821 is the more stable upgrade from the 6820. We service the ALI MPUs, (both versions). If you wish for us to take over please wrap the board in antistatic bubble wrap, then ship in a sturdy cardboard box according to the following instructions: When sending us your circuit board please get a Customs Declaration Form at the Post Office (or when you do this on-line) and write on it "Circuit Board(s) for Repair" in the comment field to avoid taxes/duties... Please include a cover letter outlining both the problem and what you would like us to do & your email address, phone number, etc. Ship to: John's Jukes Ltd. 2343 Main St., Vancouver, BC Canada V5T 3C9
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