you have a S+ machine. easiest way to check the reels strips for proper alignment is to do the# 4 test . on the mpu housing there is a small white test button, press it until you get a #4 in the coins played window, you will see two numbers in your displays, winner paid is the SS #, credit is the SP #, the spin button should be lit (provided the bulb is good) press it, the reels will advance to the top payout, they should match the glass exactly, the pay out numbers will flash in the display, 1st coin Lowest, then 3rd coin highest. each time you press the spin button the next payout will be displayed, THESE COMBINATIONS MUST MATCH THE GLASS EXACTLY, if you have any difference you should be able to see where the difference is, possibly one position off on one reel or ??.
Hope this helps
Jim