New S+ Owner, need a little advice

[Crash0]

I recently purchased an IGT S+ Double Dollar Machine.  SP 1271 and SS 3233 chips. With help from the forums I have been able to her up and running for the most part.
I replaced Battery, JP reset switch, and bypassed door optics by using a toggle switch that I mounted just below JP reset.
I plan on moving power switch to top of machine behind the lights.
A couple of questions on Coin comparator and Bill Validator

1st: I have a DBV 145 SS 6031 B022.
It is powering up and cycling when machine turns on, but won't accept bills. Will the Set 15 chip work on this?

2nd: The coin comparator. Not sure what kind I have, but seems to be a little different than the kind most found in these forums.
        1: don't know voltage has Yellow, Black, and Purple wires
        2: what kind it is only thing I can find is sticker with GN(L, maybe)(V or W)0012. Part of sticker is worn away.
            The unit is fine and works, but looking to replace with newer one that will handle more denominations, in case I want to switch later.
            As soon as I can figure out how to attach pictures I will.