[computer plate damage cause big disclosure] excavator instrument computer board solution guide
There are often driver friends saying that the instrument computer board of the excavator is too bad to work well. Why in the end the excavator's instrument computer board is so easy to be bad, today we will talk about the six reasons for the damage of the excavator computer board, and the solution to the failure of the computer board of the excavator instrument.
An inlet of a excavator or a computer board
If it is inflow when the computer board is charged, the inner circuit board copper foil will be completely burned, oxidized and unable to be repaired. In addition, the computer board plug line will lead to the needle oxidation of the computer board, thus causing the bad contact between the pin and the welding point of the circuit board.
Malfunction or abnormal operation of the throttle motor
The motor overheating short circuit is very easy to cause the computer board oil throttle control circuit part burned, so we should pay attention to keep the throttle motor clean and clean, reduce the probability of failure; in addition, when the excavator in the power supply, the throttle motor connecting rod is not moving, if take a hard force to pull the valve motor connecting rod, it is possible. It will also cause the computer board to burn out.
Contact defect and contact surface oxidation
The electrical system on the excavator is the same as the electrical appliances in the family. The poor contact of the fuse can easily cause the bulb to burn out. The bad contact of the head of the battery wire and the oxidation of the contact surface will lead to a great increase in the damage probability of the computer board and the instrument, so the contact of the pile head of the battery is very important.
Wire connection counter
This is not a small problem, the battery line is light to burn the melting wire, the weight is burned out the power circuit of the computer board instrument and CPU, and some of the excavator lines have diodes.
When it is difficult to start the excavator in cold weather, add the 36 volt power supply to start the machine. If it is operated on a new machine with a computer board controlled machine, it is possible to cause problems. It is easy to burn out the total power relay and safety relay, cause the internal coil short circuit, and the computer board and instrument on the excavator will also burn out. That's right.
Artificial misoperation
Many people suspect that when an electronic part is not working properly, the short circuit method will be used to test whether the circuit is normal or not. This method is very harmful and is not recommended.
In this case, we understand the six major reasons for the damage of the excavator computer board. In view of the reasons for the six major failures, we can avoid the failure as much as possible.
