This article helps identify which Encoder the Color Change motor uses on the Melco machine.
To see the Encoder, you will need to remove the Color Change Drive Left Cover PN: 33094-02, also known as Clam Shell Cover with screws PN: 010170-40 (Long) and 010170-10 (Short):
Below are example pictures of the three Encoder types:
New encoder
Old encoder
No encoder
If you need to replace the color change motor, you will need additional technical assistance to confirm which Part Number is needed for Color Change Motor Replacement information. Here are the available Melco Technical Support options.