Excavator Computer Board Failure Analysis

I believe that the friends who started the excavator have encountered the failure of the computer board. Today we will analyze the cause of the failure of the excavator computer board.

1. Excavator instrument or computer board water

If the internal water enters the computer board during charging, basically the copper foil of the internal circuit board will be completely burnt and oxidized and cannot be repaired; in addition, the plug wire harness of the computer board will enter the water, causing the pins of the computer board to oxidize, resulting in pins. Poor contact with solder joints on the board.

2. Throttle motor failure or abnormal operation

Motor overheating and short circuit can easily cause the computer panel throttle control circuit to burn out. Therefore, it is necessary to pay attention to keeping the throttling motor clean and clean, reducing the possibility of failure. In addition, when the excavator is energized, the throttle motor linkage is pulled. If you pull the throttle motor connecting rod hard, it may cause the computer board to burn out.

3. Poor contact of battery wire pile head, oxidation of contact surface

The electrical system on the excavator is the same as the household appliance. Poor contact of the fuse can easily cause the bulb to burn out. Poor contact between the battery stub and oxidation of the contact surface can greatly increase the possibility of damage to the computer board and the instrument, so it is also important to ensure that the battery head contacts.

4. Battery line reverse

This is not a small problem. If the battery cable is connected to the lamp, the fuse will burn out and the power circuit and CPU of the computer board will burn out. Some excavators have diodes on their pipes. If the power supplies are reversed, they are basically the same. The diode will also burn out.

5. Manual misoperation

When many people suspect that electronic components are not working properly, a short circuit method is used to test whether the line is normal. This method is very harmful and is not recommended.