Door cover key, cross screwdriver
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
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)