IGT S+ optics error 21 repair

[@ryancook1274]

I have an igts+ the coins drop straight thru back into the payout tray. The yellow light is flashing what should I check now. Its not reading a code it says insert coin

[@TURBOLANDRAIDER]

Do you still need help with this?

[@jasontaylor1751]

I am fighting a 21 error if you're offering help it would be appreciated.

[@TURBOLANDRAIDER]

@@jasontaylor1751 coin in optics jam. Blow out the optics underneath the comparitor.

[@TURBOLANDRAIDER]

@@jasontaylor1751 been almost 20 years since s plus has been in service, so I'm a little rusty on them, but I'll help if I can.

[@jasontaylor1751]

@@TURBOLANDRAIDER I tried cleaning the optics and it didn't work. I then replaced the optic board and wiring harness and still get the 21 error. I am wondering if the next step would be to replace the comparator however wish I had a better way to troubleshoot than throwing parts at it. When it first happened I could get it to clear intermittently but think it was more coincidence than anything I was really doing. It worked fine and then within a few days of getting the first 21 error it ended up like it is currently.

[@TURBOLANDRAIDER]

In the slot repair world we usually have an identical cabinet next to it, so we can swap parts back and forth. Much easier. Iirc, the comparitor does not communicate with the machine (in an s plus) is just the optics. The comparitor just decides if the inserted coin matches the sample coin. Your optics may be bad, or a bad harness going to them.

[@Starsky8888888]

I am having the exact same problem with that error 21 code. I see in your very last video you were able to fix it. can you tell me what you did? I also pulled both those parts out and cleaned those sensors underneath the first coin box. No luck. Any help will be greatly appreciated!

[@donaldsnith9338]

I have a rocky final-round skill slot machine I want to change it from tokens to quarters can you help me with that