Intelligent electric unicycle charger failure how

Power led not bright, charging led also not bright check charger entered power plug and mains have connection good, can will charger entered plug plug to normal of power socket in the try about, as situation still, will charger shell open, observation about machine within fuse have broken, as no broken, first check about power entered line whether good, in excluded power entered line of fault Hou, should check about circuit board Shang high pressure district near of components whether has virtual welding, fuse seat whether has contact bad phenomenon, Focus on T1 transformer, transistor V1, V2, is there a cold solder joint. In addition, R5 or R6 way, can also cause this fault, if the fuse out, you don't replace the ampere fuse (charger fuse 2A), should focus on D1-D4, V1, V2, R4, R7 and D15, D21 for damage, such as damage, replacement of the same type. Note that the element is damaged, it can damage both one and two, may sometimes also damaged several maintenance needs to check, after the replacement of these components to power on.