With this inner part nearly everything is easily accessible. There are two stepper motors:

NMB PM42L-048-FEA8

4 wires

Mitsumi H9601

5 wires, can probably be resoldered to use 4 or 6 wires

There is also an electronics board as well as smaller useful parts like buttons, LEDs, light barriers.

Motorola XC901051FTA

Motorola 34063 (switching voltage regulator)