First things first, I presume you know that there's four pitch rings around the edge of the platter; one per RPM. So only one should be static when viewed by the synchronised light.
Second, there is a pitch fine tune control on top of the strobe light. Is that centralised? Presuming that you've checked the basics first, then it's time to look at maintenance issues, then faults/repairs.
If you're lucky then it could be something as simple as the motor spindle needing a couple of drops of oil. If the deck is from a very dusty environment then it may even need the motor spindle cleaning of accumulated dust and crud.
Anything beyond this is drag due to a bent spindle.
SOURCE: technics 1200sl pitch control
There seems to be 2 issues with this unit. Usually when the platter speeds up very quickly, one of the IC (integrated circuits) are faulty and needs to be replaced. However, I've never seen the 33/45 lights come on in addition. So, perhaps the issue started with faulty 33/45 switches, and it then caused a short to one of the IC's.
This will have to be professionally serviced, as it is not an easy fix. There are various circuits on the main board which control the drive, so it's a matter of diagnosing which is the culprit. The 33/45 switches will also need to be tested/replaced.
- TERMiNAL OPTiC
www.DJPROLAB.com
SOURCE: technic's 1210M5G problem with the pitch slowing
Sounds like your pitch control is about to go bad. I would suggest replacing it. The part can be purchased HERE.
- TERMiNAL OPTiC
www.DJPROLAB.com
SOURCE: Numark TTX1 Turntable Problem-Platter stops
This is a drive issue. Unfortunately the TTX direct drive system isn't the greatest. It's good, but it's no Technics 1200. The only way to 'fix' this issue is to have a professional look at main circuit board to see if there are any components which are burned, or damaged in any way.
Hope this helps some.
- OPTiC.
Digital Analog Therapy
www.djprolab.com
SOURCE: Pitch and Strobes
There is nothing wrong with your turntables. The Strobe dots are only a guide to give you an idea of the speed your platter is rotating. Nothing more, nothing less. The pitch control decal is not 100% accurate, it is simply a guide to tell you where the 6% position lies, 3.3%, etc.
As long as the quartz lock function works, and the large middle strobes are nice and solid, and do not move, your fine.
You can check out these videos for more insight into these wonderful turntables:
http://www.DJPROLAB.com
- Optic
Digital Analog Therapy
www.repairny.com
www.1200s.com
SOURCE: Can't remove platter after removing lock washer
It should just lift off, but might be a little stiff.
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