Pin 4 - is telling me 'A' out optic is working (but I think it should be at. Pin 3 - is telling me 'B' out optic is working - meaning the LED is on and it turned on the output transistor which switched in a ground. Pin 2 - +VB is getting to the board, and looks like it is going to the devices on the board. Pin 1 - is telling me 'C' out optic is working - meaning the LED is on and it turned on the output transistor which switched in a ground. So going by just how the devices work, the schematic and my knowledge of what I think the voltages should look like For My Optics readings at power up and init. I made a few edits to clear up the table and added the signal names in the previous post. I'm thinking bad Harness or board at this point. Hopefullly I provided enough detail to start. Still seeing 10-1, 11-0, 12-0 and white button doesn't do anything.

I guess big question is im not seeing any changes even though I changed the optic board. I put the Multimeter on the 10 pin connection and appears to have voltage on all 6 of the 8 legs. Bought new supposedly functioning optic board and did all the same test. Remove comparator and cycle coin, cardboard, popsicle stick in front of all optics and no changes on any of the opticsĨ.

Test small white credit button and no luck This is the first issue I see the followingġ0-1 correct ( remove the 10 pin connector on optic board, and 10-1 switches to 10-0, no changes on others) Open door and closeâ€¦ 21 disappears, reel cycles one click and 21 code re appearsħ. 13-1, 13-0 flicker as should when door closedĦ. Self test Coin comparator in mode 34, drops in coin return and pull handle green light comes on and coin falls in hopper. Wiggled and removed harness and re attachedĤ. Clean optics, checked for obstructions no issuesģ. History: I have an 86 IGT S+ quarter slot that worked fine and started to get the error 21 coin tilt. Definately need some expert advice at this point. I have researched everything I could before asking for help. Hello I'm new to the forum and need some help.

Clean coin optics igt slot machine