There's something wrong with the charger, how to check

There's something wrong with the charger, how to check a lot of people reflect the charger just bought soon appear a series of problems? These problems are really 'there is a problem? The following are some common sense, 'problem is solved after understanding ~, charging power supply indicator, charging indicator light orange, first of all, please check the charger output plug plug and battery pack is ever stuck tight. If sure no problem, can check the battery box above the fuse tube is open circuit or fuse holder has a loose contact undesirable phenomenon. In addition, some models to turn on the battery lock to charge. If the above failure are ruled out, consider whether the charger output line open circuit, can use multimeter voltage blocking ( 200 v block) Measure the charger no-load output voltage, should be 41 - 44V（ With 36 v battery by different charger is different) , if not, may be the charger output line open circuit, and open the charger in the output thread, troubleshooting. Note: when replacing the charger output line, it is important to note that the original machine is negative don't answer the reverse. Second, the power indicator light is not bright, charging indicator light is not bright check input power plug connected to the mains have good charger, the charger can be input plug to normal power socket test, such as the situation remains, open the charger shell, observe the fuse in a plane had broken, if not broken, first check the power input lines are in good condition, after rule out the failure of the power input line, should check whether there is near the high of components on printed circuit boards welding, if there is a poor contact fuse holder, key check transformer T1, triode, V1 and V2, whether there is a virtual welding phenomenon. In addition, R5 or R6 open, also can cause this problem, such as fuse has broken inside the machine, don't change big ampere fuse tube ( The fuse tube charger, as a general rule, be 2 a) Check D1 -, should focus on D4, V1, V2, R4, R7 and D15, D21 is damaged, if there are any damage, can use the same type of replacement. Please note that the element damage, may damage to one or two at the same time, may sometimes damaged several at the same time, the maintenance need to examine, to replace these components to electricity. Three, severe fever, and even have flashing deformed phenomenon this is the main part of the user is often caused by loose some components with onboard malfunction. Main show is: using C18 loose when virtual welding, will cause the V1, V2 abnormal working status, quantity of heat is very big, serious when the charger shell deformation, circuit board burned, cause the damage of V1, V2, C18 to welding can be good, check the V1, V2, R4, R7. If still cannot be ruled out fault, need to check whether there is an open circuit in the D15, D21, in addition, some manufacturers the output of the rectifier tube adopts a double diode, one of the open and caused the failure, sometimes the failure in V1, V2 only damage. To inspect and replace at the same time. Four, calorific value and accompanied by abnormal sound fault cause is the output stage damping resistance capacity R31, C17 damage caused by. In addition, C12 open or virtual welding can also cause the failure. Fifth, work there are abnormal noise, not filling into electric examination circuit boards C8 for virtual welding or damage, general change of C8 can solve. 6 you have abnormal noise, work, and charging of the indicator light is dark and shine the cause of the problem is the IC1 damage, must be careful when replacement, printed circuit board copper foil is not to be damaged, replace the normal, need to adjust the R28 make the charger output voltage in the range of normal work.