Charger Model: 3634778 before connecting the power input (1) first make sure the charger is connected rated input voltage and the grid voltage used are the same. (2) charger input power for three-phase four-wire system, where three connected three-phase transmission line (FireWire), yellow and green wire is the ground wire. (3) the charger is connected to the external network through the power cable. To ensure safety, the power required to connect to external networks to install power circuit breaker and insurance, the capacity of the circuit breaker is about 2.5-3 times the rated input current. Charger Model: 3972730 power light is off, the charge indicator does not light. Check the charger input plug and mains have not connected, you can plug the charger input to a normal power outlet to try, such as the situation remains DSE7110, the charger housing open DSE, look at the machine has not been broken fuse , if not broken, first check the power input line is good, after troubleshooting the power input line DSE7320, should check the high pressure area near the circuit board components whether Weld, fuse holder if there is bad phenomenon, focusing Check the transformer T1, transistor V1, V2, etc. Are there Weld phenomenon. Also DSE7310, R5 or R6 is open, can also cause the failure, such as inside the fuse is broken, then do not replace the large tube amp fuse (charger fuse generally 2A), should focus on checking D1-D4, V1 , V2, R4, R7 and D15, D21 for damage, if damaged, can be used the same type of replacement. Please note that the above components are damaged, it may also damage one or two, sometimes also damaged several, one by one to check the maintenance required to energize after replacing these components. DSE5120 | DSE | Dongguan Nan Zhongxin Electrical and Mechanical operation provided by the Dongguan City, South City Zhongxin Electrical and Mechanical Services Department. Dongguan City, South City Zhongxin Electrical and Mechanical Services Department (zhongxin888.net.cn) strong, credible, in Dongguan, Guangdong and other industrial products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the faithful into the brilliant electromechanical and you work for a better future!