Question about Audio Players & Recorders
A turntables speed can be affected when components deteriorate.
Records sound distorted. In replacing any part, use an exact duplicate
or a substitute that is recommended by the manufacturer.
A turntable platter rotates at 78, 45, or 33 and 1/3 revolutions per minute by direct drive(a drive wheel and rubber rollers) or by belt drive.
. To check the speed, chalk a point on the edge of a record and one on the chassis near the platter. Line them up, and then turn on the record player. Clock how many times the two points meet during 1 minute.
Remove the platter by prying the c-clip from the spindle with needle-nose pliers and lifting the spindle out, then lift the platter from the chassis.
On a direct drive, the drive wheel is held to the chassis by a c-clip that clutches a drive shaft. While grasping the clip with the needle-nose pliers, pry it from the shaft with a small screwdriver. Normal 0 MicrosoftInternetExplorer4 Don't forget the positions of the washers above and below the wheel so that you can replace them correctly.
To replace a belt, remove the turntable platter and wrap a new belt around the pulley and the rim under the turntable platter. Reinstall the platter.
Remember to always use care when servicing anything that uses electricity; always unplug before removing or replacing any part.
Even if your turntables belt is stretched it may need to be replaced because it can have an effect on the quality of the sound. Just these few replacements could turn an old record player into tip top shape.
Most turntable companies provide reasonably good instructions for the proper setup and operation of their products. But sometimes, these instructions are not very clear, or are translated in a peculiar way. Hopefully, this section will remedy some of the questions that come up during turntable setup
For direct drive turntables, place the platter over the spindle and lower into place gently. There is usually a strong magnetic force that will pull the platter into place. Be prepared for that and lower the platter gently into position on the spindle. Now. place the mat on top and this step is complete.
There are 2 kinds of belt drive. dual platter designs and single platter designs. In the dual platter design the 2 parts are the drive or inner platter and the top platter. The drive platter is permanently part of the turntable body. The drive belt runs around this platter and the motor pulley. Install it now if required. Now place the top platter in position, then the top mat and this step is complete.
In a single platter design, there must be a way to contain the belt when installing the platter. If you look under the platter, you will see an inner ring running around the middle third of the platter. The belt should be already installed by the factory there. If not, do it now. The belt will stretch and stay in place. Now, place the platter over the spindle. You should notice a hole in the the top platter. Align this hole over the motor spindle. Now, reach in and pull the belt across to the motor pulley. Now place the top mat and this step is complete.
Standard Mount Style
Some turntables come with the cartridge already mounted. This makes life easy. But if you are changing the cartridge or simply need to mount it, here are the details.
You will need:
Use the self threading plastic slip on nuts, they prevent electrical grounding of the cartridge body to the headshell. This can be a major cause of ground loop hum. Slip the nuts onto the cartridge mounting flange wings.
FIRST, REMOVE THE NEEDLE AND PLACE IT OUT OF THE WAY
Now, hold the cartridge in place against the bottom of the head shell and insert a screw through the top of the head shell and into the self threading nut. Use the screwdriver to start this screw. Once started, insert a screw in the remaining side and start it too. Snug each screw into place a little at a time, until they are just almost home. Leave the cartridge slightly loose so it can move back and forth in the slotted openings.
NOW, INSERT THE NEEDLE, BUT FROM HERE ON BE VERY CAREFUL
Now slip the overhang gauge onto the back of the head shell and use your eyes to sight down the tip of the gauge. Move the cartridge in the slots until the stylus tip is just in line with the end of the gauge. This is the proper location for the cartridge. carefully tighten only one of the screws and re check to see that the overhang is still correct. Now, remove the gauge , and looking a the outline of the cartridge body against the headshell outline, slightly rotate the cartridge body until it is square with the head shell outline. Now tighten the remaining screw and recheck. If all is correct, replace the stylus guard and this step is now complete. If your turntable does not have an overhang guage, you will have to seek out an aftermarket alignment gauge or protractor.
Posted on Jun 30, 2009
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Posted on Jan 02, 2017
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