Tools that need to be prepared

Door cover key, cross screwdriver

Replacement steps

1. Disconnect the power supply of the device

2. Open the lower right door of the device

3. Disconnect all lines on the control board

Note: Please take a photo and record before disconnecting the line to avoid connecting the wrong wire during reinstallation

4. Use a Phillips screwdriver to unscrew the fixing screws and remove the control card

5. Before installation, it is necessary to use a Phillips screwdriver to unscrew the fixing screws and remove the casing of the control motherboard.

6. Fix the new control card onto the casing and reconnect all the wiring

Attention: Do not miss the terminal (the following picture is an error demonstration)