Converting free play

I am new to this site so I dont know all the slang and terminology. I just purchased my first jukebox. It is a Wurlitzer model 3200. It did not work when I purchased it. I think I have most every thing working. I plays and switches well. There are a couple of slots that want to throw the records.What is the best way to ajust? I dont want to screw up the other slots.
It is set up to play in free play mode. I would like to set back up to coin play ( plan on giving grandkids alowance in quarters. Ha Ha ) not sure where in has been jumpered at. Is there a disadvantage of doing this ?

thanks for the info. Jim

Bluefish,
First--I would advise you to read all of the above posted "informational sticky's"--
Without you having a Service Manual, it's difficult--but I'll give it a try--
The record slots--first one MUST determine WHY,it is doing this--If a side of one slot is bent, or has someone "adjusted" the carrousel backstops( these also can be "just dirty"), or {worst case} are the record lift arm(s?) bending the slot(s) ?
To do this--place the record load lever in the load position. Open upper rear door, ad spin the carrousel, and "listen" for a "clicking" sound. These are the backstops--there are two of them, one on each side. To determine if they have been re-adjusted, look at them--the factory painted them in place at the time of adjustment--they NEVER need to be moved ! (the service manual goes through the adjustment procedure). If un-adjusted, determine if they are, in fact "springing back", with full force--If they have been "oiled", you will need to remove ALL oil --Use a plastic safe-safety solvent ( but do remove all records,just as a precaution !) These must be kept "clean and dry" at all times.
If just a few slots are having this problem, one needs to "reform" the slots--very carefully--this can be done without removing the carrousel--but once again--carefully--play the selections on both sides of any you reform--
If the lift arm ends ( slang: "duckbills") are hitting it--the problem MAY {if you are lucky} lack of proper lubrication--or worse--
As for the free play situation, MOST of the guys set these on free play by turning the spring in the "Playrac" over so that it pulls the credit wheel in the opposite direction, when a selection is made.To determine this, open the Playrac ( this is the unit on the RH side that "flips down", make a selection while observing it. You will see the long coil spring. De-attach it, and re-attach it so it "pulls" the wheel in the other direction when a selection is made. Your "slug rejector" and credit switches, must also be there, and working correctly, to use coins.
HTH, Ron Rich