Question about Technics SL-1200MK2 Turntable

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I have a 1200 technic turntable mk2

Hey i was wondering if anyone can help me...i plugged in my turntable and it works i pressed start it was spinning normal then i stoped it and started it again after i changed songs and it spun very very fast not usual and it wasent on 45 or anything ....the pitch controll wouldent slow it down or anything it just spinns ver very very fast....can someone please help me? thanks n advance

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  • Elnino41475 Apr 02, 2008

    It seems that I have a similar problem. The platter spins extremely fast and both 33 & 45 speed indicators are lit. The power knob won't shut it off either... I have to unplug it. I think that the pitch adjustment slider may have gone out, but I'm not sure if that is really the issue. On occassion, after it's been off a while, it will play normally, but after a while, it starts speeding up again. Help!

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The problem is a resistor that isn't regulating the voltage/power to the unit, so it spins out of control when it heats up. Usually R213 is the culprit, but you may have to check other resistors. Sometimes IC201 will short out because of this. It is repairable, however, I would suggest taking it to an authorized service center for help, as it requires testing the various drive circuits on the main board.

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Posted on Apr 10, 2008

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Some times static charge fomr your hands or other things make this happen...don't touch the pole in the middle while speeding it up or slowing it down...if you mixing tracks...either shove the record or touch the edge of the platter...touching the pole send statis from your hands down the pole to the motor and it just takes off...I have been djing for ten years and in the begining it happend to me...

Posted on Apr 07, 2008

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1 Answer

Technic 1200mk2 pitch problems


Check for bad solderings on Q201 and surrounding areas.
Resolder IC101 and IC201. If that doesn't help, Q2 and Q3, both 2SD637R, could be broken. If that doesn't fix it replace the electrolytic capacitors. Cheers john. Styluscity

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Hi there. although my mk2 plays normally,sudenly i cannot hear it. i`ve checked wires and cartridge, what else it could be?


You need to check that the signal is getting to the amp. This can be done by removing the wires off the cartridge for the left and right channels. With the amp on touch the ends of the wires. If you hear a buzz the signal is getting to the amp and the cartridge is dead, but if you hear nothing and if the wiring is as you say good. Then the pre-amp in your amp for the cartridge has failed. This pre-amp will only affect the record deck and no other functions. If it has gone you can trace the wires from the sockets to it. Sometimes it will be on a seperate PC board. It's often a single IC that has failed. If you can replace it yourself be careful with the new one as these are often static sensitive chips.
PS the phono scokets on the amp sometimes buzz if you pull the plugs in & out!

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Try plugging it into a different power point. The problem is with the power supply fluctuating. You can eliminate that with a UPS, here is a link to wiki http://en.wikipedia.org/wiki/Uninterruptible_power_supply

styluscity@gmail.com

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More than likely your RCA cables are going bad, and will need to be replaced. Not the hardest self-repair, but you will need to have some soldering skills. In addition, caution should be taken when taking apart your turntable.

Check out the following videos for self-repair assistance on these wonderful DJ turntables.

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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
www.DJPROLAB.com

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It sounds like the pitch slider needs to be replaced...

Mikey's Hook-up
88-90 North 6th
Brooklyn, NY 11211

Cover insured UPS charges both ways and you will get sorted.

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need to know if it powers up. Does it try to spin, do you hear it trying to spin? More than likely the on/off switch went bad. No, I am not referring to the ON/OFF knob. THere is a switch this engages when turned. The part is S601. You might also want to replace the Start/Stop switch as well. If neither work, then the issue is on the main PC board, and probably IC101, or IC201 with the problem. At this stage, you will have to have a service tech look at your unit.

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