Thunder Laser Nova - How Do I Replace the Drive Shaft Module

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Tel : (86)769 826653 Dongguan City, Guangdong Province, China
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4.7 How do I replace the drive shaft module?
Firstly, disconnect the machine from its power source
Disassembly procedure:
Prepare M3/M4/M5 Allen Wrench
Tips：Loosen in anticlockwise, tighten in clockwise.
1. Loosen two upper screws on the buckle then take out the belt;
2. Unscrew and remove four screws from the blue base;
3. Unfix two screws on coupling
After that, please remove this drive shaft, like below.