Why does the computer board burn out?

Usually excavators, computer boards and meters are in the thousands of yuan to more than 10000 yuan, and most due to man-made reasons, resulting in the burning of the computer board of excavators. Equipment burned out, it is inevitable heartache. So we need to know the reason why the computer board burned down.

1, the battery pile contact is poor, and the contact surface oxidation, then the computer board CPU and instrument damage probability greatly improved, so usually must pay attention to the battery pile head contact is reliable.

2, the battery wire are connected, this is a very serious mistake, the damage rate is great, light burning wire, heavy burn instrument computer board power supply circuit and CPU circuit, some digging machine on diode, the power is negative reverse words, these will be burnt out basic diode, fuse certainly not spared.

3, throttle motor faults or abnormal operation, use the excavator throttle motor DC motor and stepper motor, if the motor overheating is extremely easy to short circuit board computer throttle control circuit part burned, usually pay more attention to throttle motor assembly machines to keep clean, it will reduce the probability of fault in open power machine; when the throttle motor is pull rod machine, if want to force to move the throttle control lever, it is likely to burn out the machine computer board.

You 4, cold start difficult digging machine, start the machine is connected with the battery 36 volt power supply, this method is often used in old machines, if there is a problem in a computer board control machine is new type operation, easy to burn the total power relay and safety relay, when the two burn caused by short circuit relay the internal coil, on board computer digging machine and instrument also follow to burn.

5, digging machine computer board or instrument of water, this phenomenon is very common, damage is great, especially when the computer board charged internal water, basically to the internal circuit board copper and oxide all burned beyond repair, there is a computer board plug harness water, will cause the fault pin oxidation computer board the phenomenon is bad contact welding pin and circuit board.

6, the maintenance of the master misoperation, many excavator repair master because they do not understand the circuit, when the suspect a electronic component is not working properly, will think of the test circuit with short circuit method is normal, this line short circuit maintenance operation method is the most is not recommended, damage is very large.

These are due to improper operation of the excavator caused by equipment failure, of course, if we use the machines in accordance with the regulations, not disorderly operation, the excavator's computer board is not so easily damaged.