Question about Technics SL-1210M5G Turntable

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Platter jurk All the lights go out except for the on/off switch and the platter moves to and fro but does not turn, almost like two magnets passing each other, had a problem with the pitch, now go due to new board and pitch, was wondering if that had anything to do with it as was fine up until the pitch went

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Not a pitch issue. This is a drive issue. The drive circuits are located underneath the turntable platter, on the main PCB. They usually go bad, more recently then before, unfortunately.

Not an easy fix, but not an expensive fix either, as the components are relatively cheap. It is time consuming, and if you have someone work on it who doesn't know what they are doing, could run up a nice tab on the repair. So be careful where you take it to. Ask them if they've worked on Drive Issues on 1200s before. If they look at you like, huh? STAY AWAY.

- Davis
DIGITAL ANALOG THERAPY
www.repairnyc.com
www.1200s.com

Posted on Jul 12, 2008

  • technics1200
    technics1200 Aug 22, 2011

    Very good advice. We fix them all the time. Sadly more so on the MK5's then any model.

    Check our site and feel free to send us an email. To lower the cost we only need you to ship us the board.

    www.technics1200s.com

    Cheers!

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Hi having a problem !!


If it has a belt drive, the belt has to be replaced.

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Power is on, turntable won't turn


Hi, sounds like the belt was not refitted when the motor was replaced.
To replace drive belt on a Crosley turntable.
1. Remove the cir-clip holding the platter in place from the base of the centre spindle.
2. Lift the platter off. You may need to use a flat blade or some similar tool to get under the platter in order to lift it up.
3. NA.
4. Place the belt around the platter pulley making sure it is sitting flat without any twists.
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Which hard drives are compatible with aspire e380


Up to a 400GB SATA harddrive.

http://support.acer.com/acerpanam/desktop/0000/Acer/AspireE380/AspireE380sp2.shtml

These are examples of SATA harddrives,

http://www.tigerdirect.com/applications/category/category_slc.asp?CatId=139&name=Serial-ATA-Hard-Drive&

Note* Suggestions

When buying a harddrive it is best to,

1) Look for the right amount in size, but also look for one that has the largest Buffer.

The Buffer is the cache for a harddrive.
The buffer area is a small memory area.
It is the first memory area the device looks for.

The larger the Buffer, the faster the harddrive will be at gathering, or giving information.

2) Spindle Speed:
Normal spindle speed has evolved to 7200 RPM. (Revolutions per Minute)
Older harddrives were 5400 Rpm, and even slower.

There are newer harddrives out with much faster spindle speeds. 10,000 rpm on up.

Unless you are a full time gamer, with wanting to have the fastest computer possible around for gaming, there is no need for a harddrive faster than 7,200Rpm.

[If you are not aware of how an average harddrive's mechanical makeup is constructed;

Inside the harddrive case are Platters. These Platter's resemble CD disks, and are constructed of highly polished metal, or glass.

The Platters rotate on a Spindle. The construction is akin to a record on a phonograph.

There are 3 to 6 Platters, and maybe more with newer harddrives.

EACH Platter has a ReadWrite Head above it, and Below it.

The Read/Write Head does just what the name implies. It reads information off of the Platter, and can write information to the Platter.

Each Read/Write Head is attached to an Arm. The Arm sweeps the ReadWrite Head across the Platter.

When the harddrive is operating at full capacity, the ReadWrite Head can be moving across the Platter, at Hundreds of Times a Second!

The Read/Write Head is located above the Platter at a distance, that is around 1/6th the thickness of an average human hair.

(Approximately .0005, or can be said as 5 ten-thousandths of an inch. An average human hair is .003 thick. {3 thousandths)

Between the distance from the Platter, and the fast movement, there is a cushion of air formed in-between the Read/Write Head, and the Platter.
The Read/Write Head literally floats above the Platter.

The Platters are coated with a magnetic media. In otherwords this media can be magnetized.
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The pattern is a series of 0's and 1's.
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One being On.

More information about harddrives can be found here,

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

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I will give a link to both the 4-pin Peripheral power connector, and the 15-pin SATA power connector in an additional comment.

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1 Answer

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1 Answer

JVC - problem. The turntable does not move,


Most modern day turntables are semi-automatic. You move the tonearm from the rest post
over to the record and the platter will start turning. There is a small microswitch inside
either below the arm base or near. There should be a flat bar connected to the base of the arm
and this will actuate the microswitch. The switch is wired in series to the rotation motor.

Solution: 1. Obviously verify the belt is on. Take off the rubber mat and rotate the platter.
The rotation motor is on the left and it has a small brass spindle. The belt should
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2. Obviously check power.
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2 Answers

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Other than that, try switching out the platters from your other turntable, and see if the problem persists. You need to rule out what it is not, before you can proceed with finding out what is the problem. So if the noise moves to the other turntable, you know the issue is with the platter. If the noise remains on the same turntable, then you can rule out the platter being the culprit, and can isolate the issue to the turntable. I've never heard of this, and I've fixed well over 3000 Technics 1200MK2/MK3/MK5 turntables in the past 10 years. I am also considered THE 1200s MASTER. So, I am not sure what could be causing this noise, other than some foreign matter. If your in the NY metro area, bring it on by, and I'll take a look at it, or give us a call, and I'll try and refer someone locally for you:

http://www.tweakrepair.com

- J

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