Charger 8.0mm 5.0mm Adapter 65w for Lenovo Computer

Charger 8.0mm 5.0mm Adapter 65w for Lenovo Computer

• General adapter principle, by the transformer, rectifier, filtering, stabilized voltage and other parts. (1) plug in the power and check whether the LED gives off light; if it does, it means the circuit on the left is normal; if the LED is not bright, it means that the voltage at point I is not available and the circuit on the left is needed.Measure the primary coil of the transformer at both ends of AB to see if there is a resistance of 100-400 ohms. Then measure the primary coil of the transformer at both ends of CD to see if there is a resistance of 5-50 ohms. If the above two parts have an infinite resistance, the transformer is damaged, the general transformer can be changed.

• If it is the fault of the Switching Power Supply, it is usually caused by the breakdown of the starting coil and the damage of the starting drive tube, etc., the replacement method can be used to try to repair it. The overhaul idea is as follows: measure the rectifier diode, whether there is an open or open circuit. Measure the three ends of the switch tube to see if there is an open or broken circuit. Measure whether the coil is broken at each end of the switch transformer. If the diode, the switch tube is damaged, it can be replaced for maintenance. If the transformer is damaged, it is difficult to find a similar replacement.

• Precautions: do not short circuit during maintenance. After welding, pay attention to the insulation. After finding the fault, do not be in a hurry to power up, see if there is a short circuit in the input and output, confirm that there is no short circuit and then power up. Otherwise, the failure will be amplified
  

• Shenzhen Waweis Technology Co., Ltd. is a high-tech enterprise engaged in r&d, production and sales of notebook adapters. Main: switch Power Supply, power adapter, charger, LED power supply and other products professional production and processing. The products have passed UL, CE, FCC, KC, PSE, SAA, GS and other certifications. The products produced by the company have perfect protection function, stable performance, safe and reliable. With professional r & d, production and sales experience, the company has accumulated strong technical advantages and rich market resources in the field of power adapters. The company is now able to provide a full range of alternative adapters for the world's major brands of notebook computers.

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