Question about Technics SL-1200 Turntable

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Technics 1200 platter not spinning, judders but won't spin. Powers up ok though - lights all on

Platter not spinning judders but won't spin. Powers up ok though - lights all on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017

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djproaudio
  • 515 Answers

SOURCE: technic 1200 mk2 turntable wont spin

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.

Posted on Nov 02, 2007

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djproaudio
  • 515 Answers

SOURCE: technics dj deck 1200mk2

So the unit powers up still? First and foremost check to make sure there is nothing forcing the platter to not rotate. If the platter is fine, and there is nothing holding it back, then you have a drive issue. More than likely one of the IC's (Integrated Circuits) failed, or it could be one or some of the other resistors which control the drive/platter on this unit.

Unfortunately, this is not an easy fix. You will need to take it to a qualified service center for repair. Make sure you ask the service center if they are familiar with the drive of the Technics SL1200MK2, many service centers are not.

- Optic.
DJ PRO LAB

Posted on Apr 21, 2008

djproaudio
  • 515 Answers

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

Posted on Apr 30, 2008

SOURCE: Technics SL-1600MK2

Tonearm lift is probably a deteriorated belt. Google it, it's pretty common. The platter spinning might be due to a bad control board. You'll probably have to go to a repair shop to diagnose it.

Posted on Oct 27, 2008

  • 476 Answers

SOURCE: The platter on my Technics SL 1200MK2 stopped spinning

If you remove the rubber pad from the top of the platter then you should be able to lift the platter off the servo drives' center shaft,
from memory the unit is not attached just held on by gravity,if the servo magnet is gone the take it in for a service and pay the man for his time,

My first problem on my 1200s was a pitch control issue and easy to fix,with a little cash,never use second hand parts unless you know what you are doing because when they fail on you while playing to a packed dance floor then youll get more of a supprise than you barginned for,

Misterdj

Posted on May 03, 2010

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Technics 1200 fault where both the 33 & 45 buttons remain lit, the platter spins at super speed,start stop button doesn't work and the red light is not on


Did you try to de-assemble and clean the contact of this button with contact cleaner, take care to not shoot on rubber parts if you have near the contact, it would blown up !

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It won't turn


If the platter doesn't spin then check the belt has not fallen off. It will be seen in a hole under the turntable matt.

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Platter not spinning


Is this a belt driven model? If so then just replace the belt. Also check that platter can turn. Sometimes grease or dirt builds up. If you can't turn it by hand then neither can the motor.

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Motor dont work


Is it a belt drive turntable? If it is then either the belt is off or broken.

Jan 16, 2013 | Technics SL-1200 Turntable

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Won't drain and won't spin ,makes a clicking sound


sound as though the drain pump has something hitting the impeller making the clicking noise,and the filter basket next to the pump is blocked by debris and not letting it drain

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1 Answer

Failed (Error code: WCD44-RSI)


Oh I know! Pick me, pick me! (Lol!)


You mean WCD-44-rm5?

Spindle test. Actually finding out if the spindle motor is spinning the Spindle, at the maximum spindle speed in RPM's, the spindle is rated to spin at, (At maximum spin up)
Also a few other quick tests.


!O_O!

Basic construction of your harddrive. IDE (PATA) or SATA;

Inside the harddrive's case are;

1) Platters: They resemble CD or DVD disks, and are usually made of metal, or glass.

The Platters are coated with a magnetic medium. (Ferrous substance. Think Iron )
There may be 3 to 6 Platters, or more, inside the harddrive case. They are coated on both sides with the magnetic medium.

2) Spindle, and Spindle Motor:
The Spindle is part of the Spindle Motor. It is the shaft of the motor.
Comes out of the Spindle Motor, and the Platters are attached to it.

The Spindle Motor is designed to spin the Spindle (Shaft) certain Revolutions Per Minute, when called upon.
The maximum RPM's it will spin is stated for the harddrive unit.

Older harddrives were rated at 5400RPM.
(Slower before the above time period)
Newer harddrives usually spin up to 7200RPM.
Gamer type harddrives may spin 10,000 or 15,000 RPM's.

http://www.behardware.com/articles/727-1/western-digital-velociraptor.html

3) Read/Write Head:
The magnetic medium on the Platters, is arranged by a Read/Write Head.
There is a Read/Write Head above, and below, every Platter inside the Harddrive.

The name indicates what the Read/Write Head does. When the Read portion of the head is activated, it reads what is ON the Platter.
When the Write portion is activated, it writes TO the Platter.

(The magnetic medium is arranged, by the Write portion of the Read/Write Head. It is arranged in a series of 0's and 1's.
0 being OFF, 1 being ON.
This is changed into Machine Language the computer can use )

4) Actuator Arm:
The Read/Write Heads are attached to an Actuator Arm.
The arm swings the heads back, and forth, across the Platter's surface.
(When called upon it can swing the Read/Write Heads back, and forth, at HUNDREDS OF TIMES A SECOND. -> HUNDREDS )

5) The Actuator Arms are attached to an Actuator Motor.

The entire assembly above is encased in a.....case.
It is assembled in a Clean Room. A room that is 99.9 percent dust free. The outfits the assembly technicians have to wear resemble a NASA space suit. They have to walk through an air corridor, and be b-lown off by air jets, before they can enter the Clean Room.

The harddrive's case has a small filter on it. This helps keep the atmosphere inside the harddrive, as it is outside the harddrive, but with NO moisture, NO dust.

On the bottom of the Harddrive case is an electronic circuit board. Controls the hardware inside the harddrive case, and is connected to the motherboard.

The Spindle test is to see;
1) If there is any axial, or horizontal runout. That is to say if the Spindle wobbles, so to speak. If so the Spindle Motor bearings are bad.

[Platters have to stay Dead Level. The Read/Write Head is spaced off of the Platter, by about .00003 of an Inch.
(3 hundred-thousandths)
May be closer my figures could be off,
In comparison an average human hair is .003 of an Inch thick.
(3 Thousandths)

Due to the speed the Platters spin at, and the closeness of the Read/Write head to the Platter, the Read/Write Heads actually float on a cushion of air, when the harddrive is active.

When you hear or read the term 'Head Crash', it means one, or more of the Read/Write Heads, has touched a Platter, (Or Platters), and wiped off some of the magnetic medium ]

2) Spin up speed. How long it takes the Spindle Motor to spin up to the required RPM's. Actually, how long it takes the Spindle Motor to spin up the Platters, to the desired RPM.

Doesn't reach the RPM goal? Spindle Motor bearings are probably bad. (Or a failure in the electronic circuit board, on the bottom of the Harddrive. Doubt it. Usually just fails altogether )

A) http://computer.howstuffworks.com/hard-disk.htm

B) http://www.youtube.com/watch?v=s8-pHHv9LYQ&feature=fvwrel

Point?
The test indicates your harddrive is going bad. I would (Pronto) copy off my personal information. (Disk/s, thumb drive/s, storage on the internet, etc)

Regards,
joecoolvette

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1 Answer

I have a problem with the turntable I just purchased...


Hi, remove the platter and check that the belt has not come off. Cheers john. Styluscity

Nov 12, 2011 | Technics SL-BD20D Turntable

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