Turntable Motor Replacement – All Versions
Caution - Please review the following items before beginning.
- The mechanism of the CDM PRO module consists of delicate optical, mechanical and electrical components; therefore, proper handling measures have to be taken.
- To avoid damage to the laser by Electro Static Discharges (ESD), service technicians should be grounded during handling.
- Excessive mechanical force on any part should be avoided.
- Storage in dusty, high temperature and high humidity environments should be avoided.
- Never touch the lens with your finger. Avoid spoiling the lens with grease from the mechanical parts.
- Always work in a clean & safe environment.
- The optical pick-up unit (OPU) has been carefully adjusted during manufacturing. Handle this part with great care. Do not disassemble. Do not readjust.
- Always use the proper tools to handle the unit.
- Fast heating up (e.g. by bringing the mechanism from a cold place into a warm and humid room) can result in moisture condensing on the lens, thus influencing the playability for a certain time. Before checking performance, the mechanism should stabilize to climatic conditions for at least 4 hours.
WARNING: INVISIBLE LASER RADIATION. AVOID DIRECT EXPOSURE TO THE LASER BEAM. THE LASER BEAM CAN DAMAGE THE HUMAN EYE.
Using the soldering iron with a small tip and desoldering pump, unsolder the flex-foil cable from the turntable motor. To prevent damage to the foil cable, do not apply excessive heat to the contacts. With a small screwdriver lift the cable to make sure it has been successfully desoldered.
Turn over the player and remove the 4 No. 6 torx screws holding the black plastic cover.
Insert two small screwdrivers under the hub of the turntable motor. Each one from opposite direction. Start lifting the hub with both screwdrivers at the same time so you do not bend the shaft of the motor. After the removal of the hub, pay close attention to the magnet that is located to the side of the shaft of the motor. Make sure the magnet did not come loose or is missing. If it came loose, reattach it with a small drop of Loctite Super Glue.
Remove the two screws holding the motor with T6 and remove the motor from the player.
Pay a close attention to the replacement motor. The replacement motor comes with a shorter shaft than the original motor you have just removed; therefore a small modification is necessary for a correct operation. Also on the back of the motor you will notice a red dot (sometimes blue or other color). This is a DC motor and therefore polarization of the terminals is important. The red dot should be positioned toward the inside of the module. Install the new replacement motor using the original torx screws and resolder the flex-foil cable.
Position the 0.02″ shim or feeler gauge on the top of the module next to the motor to create a space between the turntable and the chassis of the module. The spacing is extremely critical, to ensure that the optical assembly can find focus. It is also important that the turntable not touch the chassis. It is important to get the shim ready now, because after you apply the super glue to the turntable you will have only a few seconds before the glue dries.
Apply a small drop of the super glue into the center of the turntable. As you see in the photograph, use only super glue in a gel form. This will prevent “run off” of the glue and you will have a precise control for the application.
Push the turntable (with glue applied) onto the shaft of the motor all the way down until it contacts the shim. The glue dries quickly. Remove the shim and check to make sure the turntable sits correctly and does not touch the chassis of the module. This is not a permanent bond. The glue only helps to create an additional bond so that the turntable will not move during the operation. The shaft on the original motor was longer with a larger surface area with more friction so the turntable did not need any additional bond to remain in the correct position.
Reassemble the black plastic cover removed in Step 2.