Question about Technics Audio Players & Recorders
Here's some information for you. Since your unit is a SL1210MK2, it may be harder to determine the age of the unit:
It is possible to tell the year (and the month) when the SL-1200 was manufactured from the serial number on the back or bottom of the turntable. SL-1200 serial numbers are in two different formats, depending on the date of manufacture. It isn't exactly possible to determine the decade in which the SL-1200 in question was manufactured, as the serial number contains only the last digit of the year. If the year digit is 8, the turntable may have been manufactured in 1978, 1988 or 1998. If the year digit is 0, the turntable may have been manufactured in 1980, 1990 or 2000. One rule of thumb is that old-format serial numbers belong to SL-1200s manufactured during the 1970s and 1980s, while new-format serial numbers belong to SL-1200s manufactured during the 1990s and beyond.
Old-format serial number: NHOJF20765 (SL-1200 manufactured 1982)
The first digit shows the year when the SL-1200 was manufactured. These serial numbers contain no indication of the month of manufacture. It should be noted that serial numbers in this format contain no letters following digits.
New-format serial number: GE4FB001154 (SL-1200 manufactured June 2004)
The first digit shows the year when the SL-1200 was manufactured, while the month of manufacture is indicated by the letter following it. Months are coded as letters between A and L inclusive; A indicates January, B indicates February, and so on.
In addition to the above, all the SL-1200MK2s from the 70's and early 80's have a 4 inch diameter plate where the RCA and ground wires enter the chassis in the rubber base of the unit. The later models have a smaller hole through which the wires enter the unit.
TWEAK A/V LAB
Posted on Apr 10, 2008
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
Posted on Apr 30, 2008
SOURCE: technic sl-dz1200
I had the same problem. Replacing the sensor is not gonna help. it is a focus problem. I had to fold a small piece of paper and put it under the sensor to raise it up alittle then you screw it in. The size of the paper you will have to figure out for yourself, but it will help u fix your problem
Posted on Apr 08, 2009
PULLon it harder!!!! Its a *****! It will come up and off! Also do it evenly when you pull...there is a magnet under the platter. Dont break it! PULL evenly!
Posted on Apr 28, 2010
You will have to lift off the cloth on the platter section to expose two rather large holes in the plattr. Insert your thumb and forefinger, and pull up.
Posted on Jul 13, 2010
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