¶ 1.5 Main Board
1. Disconnect the main power. Remove the 4 screws on back cover by knob wrench and remove the back cover
2. The main board is located on the right side. Take several photos before your operation.
3. Disconnect all the cables, remove the 4 screws at 4 corners, and take the main board off. (Cut some cable ties as needed to make unplugging easier).
4. If the main board is going to be replaced, remove the 2 motor driving PCBs from main board (Figure 1.5 - 2), and install them onto the new one.
5. Each cable to main board has a label indicates which slot it should go to. Follow these labels and your photo to recover all the cables.
6. After the replacement, turn the machine on and test all the features.