Safer Charging

1: Burn or blow up safely

First look at the 300-volt rectifier bridge, diodes, switching tubes and large filter capacitors. It may cause safe burning and blackening, or it may be caused by a problem with the anti-interference circuit.

Special attention: due to the failure of the switch tube, the power control chip and the current detection resistor are usually burned out. The thermistor is also very simple and safe to burn out.

Common faults and repairs of the charger/power adapter are here. Otherwise, you should pay attention to the daily maintenance and maintenance of the charger/power adapter to reduce the occurrence of failures and effectively expand the scope of use. life.

2: The safety tube is normal and has no output voltage

The safety tube is normal, and there is no output voltage to indicate that the switching power supply is not running or under maintenance. The step is to check the start voltage value of the start pin of the power control chip. If there is no starting voltage or the starting voltage is too low, please check the external components of the starting pin and the starting resistance for leakage.