| **Reel Slots** Gaming Machines > IGT S and S-plus Reel Games |
| Pressing Button to Add Credits For Free Play on S-Plus Machines |
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| Pitts256:
I've checked into it. I traced it back to the CPU board, it's labeled "IR DET M+ (SERV/CHG) S" on the schematic. The plug is a live input to the CPU and I'm assuming it is for an input device mounted in the place of the SERV/CHG switch. Sending pulses from the plug to the CPU did nothing. |
| LuckyDog:
--- Quote from: Pitts256 on April 23, 2024, 06:00:20 AM ---How are the projects going? --- End quote --- Life also has me distracted from working on this. Not enough hours in the day!! Still plan to put this together when I have a chance. Does anybody out there have one of these already assembled and working they'd like to part with?? |
| twinfire:
--- Quote from: Pitts256 on April 24, 2024, 06:51:41 PM ---I've checked into it. I traced it back to the CPU board, it's labeled "IR DET M+ (SERV/CHG) S" on the schematic. The plug is a live input to the CPU and I'm assuming it is for an input device mounted in the place of the SERV/CHG switch. Sending pulses from the plug to the CPU did nothing. --- End quote --- Pitts256, I’m surprised you got nothing from sending the pulses. The only thing I can think of is you didn’t have the correct chip in place when you did the test? According to member ersk3 at the time of his post (March 09, 2017) either chip SP585 or SP1168 were the only chips he was aware of that would accept the 50ms pulses that convert to credits. Now it seems as of (2021) ersk3 has listed these chips: SP585, SP618, SP655, SP667, SP674, SP714, SP 742, SP765, SP876, SP1041, SP1138 & SP1168 as being compatible to work with the 50ms pulses. These chips are found in the list here, you will however have to download the list: https://newlifegames.com/nlg/index.php?topic=33460.msg177252#msg177252. ONLY the chips identified with (Yes) in column “NRI coin acceptor according to PSR” are the likely candidates that will work. Notice that SP585/SP1168 are among the list & are the ones that ersk3 experimented with and were found to work. NOTE that SP1137 (Montana chip) is not listed. I’m guessing your test was conducted with the SP1137 chip as this would be a logical choice not knowing about the SP chips for external coin acceptor (NRI) that administrator knagl mentioned here: https://newlifegames.com/nlg/index.php?topic=15051.msg80738#msg80738 How are the pulses to be delivered to the purple & green wire, not sure I understand exactly how this should be done? Maybe you could elaborate? |
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