Question about Technics SL-1200 Turntable

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Pitch is not working correctly

Hi,

when i low the pitch some times it changed the speed slowly then sometimes fast.... and same for increasing the pitch.... I don't know is the problem

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I took the the platter off the turntable and discovered it is cheap molded plastic. I was experiencing significant amounts of wow and flutter which was more noticable in the mid range frequencies. It rendered the whole thing useless. My solution was to increase the mass of the platter (thus increasing it's angular momentum) by layering Plastacine inside the molded inside base. The more you use the less the wow and flutter will be. My old turntable's platter weighed the same as the whole USB turntable! Also make sure that the drive belt is free from grease - I did find a wee bit.

Posted on Sep 01, 2012

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A) "dirty" main power switch, comes from sparking when power switch has been used a lot (happens also with some CD/DVD players - makes them loose some power - consequently, focus and/or spindle will not work properly). Try cleaning it up or replacing it (bypassing it will tell you if the switch is really the problem).

b) bad contact on the speed control slider (try moving it while slightly pressing it downwards, see if there is any change, if there is, have it cleaned up or replaced)

c) a problem with electronic speed control, possibly a loose solder connection or a bad capacitor somewhere in the speed control circuitry. If the circuit has fuses in it check if they are all ok. I once had a problem with a turntable that had a fuse "partially" blown (people were using the turntable a lot for "scratching" which overheated the fuse but hadn't blown it out, yet it changed in resistance from zero ohms to a few hundred ohms - the turntable began to **** and the speed was changing).

d) none of the above, it could be something else that i can't think of right now

hope ya get it workin'

regards

3rq8 (Triarcuate)

Posted on Jul 14, 2009

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