Motor that turns platter rotating spindle malfunctioning. Affects door opening and closing and cd selection.

Hi Jeff...
The platter on the JVC LA-10 does not come off as most turntable platters do. It is attached to the spindle with a Philips head screw.

Here are the steps:
Remove dust cover from turntable. Unscrew hinges and lift.
00.jpg" alt="Remove dustcover at hinges.">Remove dustcover at hinges.

Secure tonearm to prevent stylus damage.
00.jpg" alt="Secure the tonearm.">Secure the tonearm.

Remove slipmat from platter.
00.jpg" alt="Remove slipmat.">Remove slipmat.

Turn the turntable on its side and remove screws that hold the top to its base. Remove platter by unscrewing the bottom plate from the turntable. The spindle bearing is held in place with a Philips head screw. Loosen it and the platter will separate easily from the spindle.
00.jpg" alt="Separate the spindle from the platter by loosening with a Philips head screwdriver.">Separate the spindle from the platter by loosening with a Philips head screwdriver.

Loop replacement band around the pulley cylinder in the motor. Replace platter and bottom plate. Tighten spindle screw. Test the new belt by turning the platter clockwise two or three rotations. Belt should fit snugly and turn with little resistance.
00.jpg" alt="Test the replacement belt by turning the platter clockwise.">Test the replacement belt by turning the platter clockwise.

Ok! On the main part of the turntable should be a spindle, not the one in the middle! That if you put your finger on will turn. This is the motor. On the underside of the silver dish should be a flange. Place the belt round it and put the platter on the center spindle (the one in the middle). If the platter has a hole in it, grab the belt and pull it, while rotating the platter till you can see the motor spindle. Attach the belt to that. Put the rubber matt on and try it out.
The black piece is for 45's with big holes in them (jukebox ones).
PS if the platter hasn't a hole you will have to put the belt on the motor spindle first and then around the flange (try not to pull the belt to much).
Also some turntables pass the belt via a leaver that lifts the belt up and down for 45 and 33 speeds, others just change the motor speed.

Lift the platter off the turntable. You can identify the motor spindle by using your fingers to turn the round shaft which rotates freely. Remove the rubber mat off the platter. Place the belt around the outside of the drum on the bottom of the platter. From the top of the platter, place your finger in one of the platter holes and tension the belt so it will not fall off or twist. Griping the platter trough the holes while keeping tension on the belt place the platter on the turntable aligning your finger with the belt to the motor spindle. Place the section of the belt on your finger over the motor spindle. Replace the rubber mat on the platter.

Yo wil need to check your belt tension and if it is worn. If so it will need to be replaced. Lift felt on platter and and lift the platter section off the unit by putting your thumb and forefinger through the two large holes and pull upwards.There should not be any special routing for the belt and should go directly onto the spindle motor to your platter. Place the belt around the inside rim of the platter while it is still off the unit. Now replace the platter and move the platter around until you see the spindle motor through one of the holes. Use some tweezers to manouvre the belt onto the spindle motor. On some units you will have to lay the belt out inside the unit, replace the platter and manouvre the belt onto the platter. Hope this helps

1) Remove the platter - just lift up
2) Underneath the platter, you'll see a small lip section
3) Wrap the belt around this lip
4) Put platter back on turntable
5) Rotate platter until you see the motor shaft through the holes on the platter - a brass round looking piece
6) Pinch the belt around the motor shaft.
7) That's it.

- OPTiC
MasterTech
Digital Analog Therapy
Turntable Parts : Turntable Repairs

1) Remove the platter - just lift up
2) Underneath the platter, you'll see a small lip section
3) Wrap the belt around this lip
4) Put platter back on turntable
5) Rotate platter until you see the motor shaft through the holes on the platter - a brass round looking piece
6) Pinch the belt around the motor shaft.
7) That's it.

- OPTiC
MasterTech
Digital Analog Therapy
Turntable Parts : Turntable Repairs

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
be visable through the holes in the platter. If not pull the platter gently up, there will
be some resistance. The belt wraps around a smaller inner ring on the underside
of the platter and the rotation motor spindle. If it is degraded it will be stuck to the
platter or fall apart. Generally there 3 common sizes. ( 21.4 / 23.6 / 25 inch) they
readily available on E-Bay, search term "turntable belt".
2. Obviously check power.
3. Check the microswitch, it should "click", verify with ohm meter.
4. Some turntables have a "cut" or stop function. The arm must return first to rest before
starting again, again the microswitch is the trigger.

Lift the mat from the platter. Lift the platter off the spindle - it just pulls off upwards. Wrap the belt around the sub-platter underneath. If the belt is not stretched, it should stay there by friction as you replace the platter onto the spindle. Rotate the platter by hand until the motor pulley appears through the large hole on the front left hand side, and then gently pull the belt over the pulley, taking care not to twist it as you do so. Replace mat.

In my opinion, spindle plate is pressed and when top cover lowered there is not enough / required gap between optical lens and CD so laser is not being focused to read data properly.
Please hook a flat screwdriver under spindle plate and turn it very carefully so spindle plate pushed upward little bit as shown below picture....hope this will work.

There is really nothing else to it. If the drive belt is in tact, and properly installed, and the spindle motor is rotating properly, your turntable should rotate. There's nothing else that rotates the platter. Just make sure the belt is wrapped around the spindle motor.

- Davis
DIGITAL ANALOG THERAPY
www.repairnyc.com