Lee Sheng-electronics factory Teaches you electric car charger Troubleshooting maintenance solutions for common problems: fuses blow - 1, first carefully review the various components of the circuit board on top of the battery charger supplier, see the appearance of these elements is burned or paste electrolyte overflow, smell - the smell without odor; 2, and then measure the resistance value of power input battery charger wholesale, if less than 20OkΩ, then the back-end local short circuit, then were measured four rectifier diodes positive battery chargers anti-resistance values ??and two current limiting resistor, to see whether a short circuit or burned; 3, and finally measuring whether the normal power supply filter capacitor can charge and discharge, switching power transistor whether the breakdown damage, UC3842 and surrounding components whether the breakdown, burnout. Lee Sheng Electronics Factory teach you the output DC voltage is too low causes: 1: source switching power transistors are usually followed by a small but great power resistance resistor battery charger Which is good, as the overcurrent detection resistor Wu protection. The resistor - as in 0.2 ~ O.8Ω. If the value of resistance change or open welding, poor contact will cause the output voltage is too low. 2: The high-frequency pulse transformer bad, not only causing the output strider pressure decreased, it will result in lack of incentives in order to switch the power transistor switch repeatedly damage. Battery Charger, Battery Charger Jinhua, Sheng Li electronics factory quality assured by Lee Sheng Yongkang Electronics Factory. Road Zhiyuan, temper forward. Lee Sheng Yongkang Electronics Factory (www.ykshengli.net) aims to become and you win symbiosis, strategic partners to move forward, more determined to become the most influential electric car chargers companies, and you leap together to success !