I managed a Pro Sound Store for over 20 years (from the late 70s to the early years of this century). These three models were on the shelves when I became a sales person at the store that I later managed. Within a year I was promoted to assistant manager and shortly after that my manager's back had issues and he had spinal surgery. By that time the replacement models had arrived and were on the shelves. Customers regularly brought their SL-200s, SL210s, and SL-220s in for belts. Because they took a different belt than their predecessors, I checked model numbers and part numbers with Panasonic Parts to ensure everyone got the proper belts. 

A few years later, there was a major belt maker parts cross-reference with a lot of errors in it, and the info it contained had a belt that contradicts what Panasonic told me when I called to order parts direct, so I know my info is correct. There are many, many major parts dealers that copied the errors in the non-Panasonic parts cross-reference, and even that information was copied as if it was factual. Many major parts places are selling the wrong belts for these specific models, even to this day.

Here is the info I copied from my notes from inventory and my actual customer’s SL-200s, SL-210s, and SL-220s (I never saw an SL-221, perhaps they were not sold in the US). This info is direct from my notes and observations:

I have no notes on the SL-200, I am not sure why, if you have an SL-200 please contact me with the Contact Seller link.

The SL-210 is a fully manual belt drive turntables. Most of the controls are on the outside of the dust cover. On the front left is the speed selector, it has 3 positions: Sliding it to the left selects 33, there is a • in the center (basically off), and sliding it to the right selects 45. DJs of this time appreciated the • in the center, as when this position is selected, the motor is totally disengaged. This allows for scratching, back cueing, and a lot of other techniques. (The later models like the SL-BD models did not have this feature, some DJs still seek the SL-210.) Next to the speed selector are separate pitch controls for 33 and 45 RPMs. The next switch to the right is the Power On/Off button. If the speed selector is set on 33 or 45, the power button starts and stops rotation of the platter. (If your speed selector is set at the • and you put the power on, the platter might rotate slightly at first. This is normal, and there is no concern; not a repair issue.) To the right of the power switch is cue switch, the markings make it self explanatory. Near the back, there is a screw adjustment for the height of the tonearm. If the arm does not raise/lower smoothly, refill the well with hydraulic fluid and it will be smooth once again. Near the tonearm pivot point is an anti-skating device. If you are having issues with your anti-skating device, click contact seller near where it says turntables, etc. (upper right side of this page), I want to help. As it is a fully manual turntable, the user must move the arm to the record and either set it on the vinyl, or lower it with the cue lever. The plater does not begin spinning until the user uses the on/off switch. When the user chooses, the user must raise the arm to stop playing the record. There is no automatic cut off, there is no auto-lift.

The SL-220 is a semi-automatic belt drive turntable. Most of the controls are on the outside of the dust cover. On the far left is the speed selector, it has 3 positions: The far left is 33, there is a • in the center, and 45 is on the far right. DJs of this time appreciated the • in the center, as when this position is selected, the motor is totally disengaged. This allows for scratching, back cueing, and a lot of other techniques. Next to the speed selector are separate pitch controls for 33 and 45 RPMs. The next switch to the far right is says "stop". On the far right there is a cue switch. Move the cue lever up, and the arm raises, move it down and the arm lowers. Near the cue lever is an anti-skating device. If you are having issues with your anti-skating device, click contact seller near where it says turntables, etc. (upper right side of this page), I want to help. As it is a semi-automatic turntable, the user must move the arm to the record and either set it on the vinyl, or lower it with the cue lever. The plater begins spinning as the arm nears the vinyl. When the user chooses, the user hits "stop" to stop playing the record. There is an automatic cut off after the end of the record, the arm lifts and returns home.

The differences in the final letter (A) indicates that the turntable came with a pre-installed cartridge. If you still have a cartridge Technics or Panasonic cartridge that takes an EPS-74STSD, take a picture of your cartridge and old stylus, I still have replacements for this model. None of that has anything to do with the belt or drive system.

The differences in final letters (M, MC, E, X, XAL, XGE, and XGF have to do with the power requirements and type of plug necessary to plug in where the model was originally sold. None of that has anything to do with the belt or drive system.