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This TT was given to me by a friend. The platter makes a slight noise as it turns. (bearing?) I don't have the manual and can't see how the platter comes off. It is a Pioneer PL-112D. (I put this post in Vintage on purpose). I know the deck is not worth anything but I just like to see this old stuff work properly. Thanks for any help.
I got the platter off by grasping thru the finger holes and tapping the spindle as suggested. After removing the bushing and spindle assembly, I could see that some foreign material (dirt?) had entered the bushing and I could feel a rough spot. I cleaned the shaft with scotchbrite and added a bit of polishing compound to the bushing. I chucked the spindle in my drill and worked it in and out of the bushing. (This sounds pretty brutal but I was very careful and patient). After a careful cleanup, I added a couple drops of light oil to the bushing. The rough spot was completely gone. I reassembled the TT and tested it with Mr. Acker Bilk -- "Stranger on the Shore" (one of my all time favourites). The TT is now quiet and sounds great. Thank to all who posted and helped me out! --David
We have some service info for the PL12D at the links below. This shows platter and center shaft assembly detail and may help you with the PL112D.
I used to own a similar model and had the same scraping problem. After you lift the platter off, check to see if the lip around the bearing has three screws. If so, you can remove those screws to pull out the bearing assembly. The bottom of the assembly unscrews like a jar lid, and inside you'll find a plastic "button," which is what the bottom of the spindle rides on as it turns (I think this is called the "thrust plate" in turntable parlance). Mine was split in half, probably the result of someone dropping or mishandling the table at some point in its life. The split caused the spindle to ride lower than it should, which caused the table to scrape. It also caused obvious speed problems, since the spindle couldn't rotate smoothly.
My solution was to just get rid of the table, but if your problem is similar and you have some time it might be possible to find a replacement button or a worthy substitute. I've heard other TT owners say you can often get a local machine shop to make inexpensive replacements out of teflon, which is probably a much better material than the original.
A quick check in the Vinyl Asylum (my other hangout here) shows that the PL 112 is a belt drive unit. Since belts have to be replaced, removing the platter is generally dirt simple. Here's the procedure I would follow:
1. Remove the record mat from the table. It should just lift off, unless the rubber has deteriorated and stuck to the platter, in which case it will have to be carefully peeled off.
2. You should see 2 or more holes/ports in the platter. These are there to both allow access to the belt and to allow you to lift the platter off. Slowly rotate the platter clockwise until you can see where the belt goes over the motor pulley. Using a small screwdriver, lift the belt off the pulley, trying not to stretch it unduly.
3. Examine the area around the spindle. On many tables, the platter just sits in place, but in others (Dual and Garrard come to mind) a c-clip or other device is used to lock the platter in place. If you see such a device, remove it as gently as possible.
4. Place your fingers in the platter's holes, try to lift it off. You may want to put your thumbs on the spindle and push down simultaneously, as platters tend to settle into place. With any luck at all, it will pop off. Inspect the underneath of the platter and the deck for any lablels, parts, etc. that may be floating around and causing noise.
5. Use a foam swab and a drop or 4 of alcohol to clean out any dried/congealed oil from around the spindle. Repeat until the swab comes out clean. Give it a shot of compressed air to evaporate any remaining alcohol. Put 1-3 drops of Radio Shack Teflon oil onto the bearing surface. You might also want to do the same thing to the motor shaft - if you can get at it.
6. Gently wash the belt with Dawn. Pat off excess water and let air dry. If the belt looks bad or was stretched out, skip this and go buy a replacement.
7. Place the platter back in place without the belt. Gently spin the platter and listen to see if the scraping noise is gone. If so, remove the platter, replace the belt, usually the belt will fit around an inner ridge of the platter, put the platter back, gently stretch the belt over the motor pulley.
8. Replace any retaining devices and the rubber mat, and you are done. I had a Technics SLBD 20 that tended to scrape if the platter settled too firmly (or of I pressed too hard on the Discwasher). So about once a week, I'd just lift it to free it up.
If interested, this site has the SERVICE manual available, but doesn't say if its the original, or a scanned COPY of the original.
PIONEER .. PL-112D .. TURNTABLE .. SER ... $20.00
I've replaced a belt and stylus on this table. Its not worth what I've spent on it already. Does anyone know how to remove the platter before I permanently file it away?
lift it up with your fingers through the holes in the platter while gently tapping the spindle top with the handle of a small screwdriver or some other similar device. Usually the reason the platter is hard to remove is just that it is too far down on the spindle shaft or the shaft is a bit dirty (tarnished or oxidized) and the platter is stuck. A bit of a tap on the spindle top should do the job.
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