How to check the power adapt

Many people have reported that the power adapter just bought soon after the emergence of some problems? These problems are really "problematic"? The following charger manufacturers to introduce a few common sense, understand the "problem" will be solved.

A, charging power indicator light, charging indicator orange

First of all, please check the charger output plug and the battery box charging plug is not tight. If you are sure that there is no problem, you can check whether the fuse tube above the battery box is open circuit or the fuse holder has a loose contact phenomenon. In addition, some models have to open the battery lock before charging. If the above faults are ruled out, consider whether the charger output line is open circuit, use a multimeter voltage block (200V block) to measure the no-load output voltage of the power supply, should be 41-44V (with 36V batteries due to the different chargers are different), such as no words, it may be the output line of the charger is open-circuit, and open the charger to change the output line, you can rule out the problem. Note: When replacing the charger output cable, be sure not to reverse the positive and negative poles of the original machine.

Second, the power indicator does not light up, the charging indicator does not light up

Check the power adapter input power plug and the utility is not connected, the charger input plug to a normal power outlet to try, such as the situation remains, the charger shell open, observe the machine fuse is not broken, such as not broken, first check whether the power input line is good, in the exclusion of the failure of the power input line, you should check the board near the high-voltage area of the components whether there is a false welding, fuse holder whether there is contact, the fuse block is not a good idea. Welding, fuse block whether there is poor contact phenomenon, focus on checking the transformer T1, transistor V1, V2, etc. whether there is a phenomenon of false welding. In addition, the open circuit of R5 or R6 will also cause the above failure. If the fuse in the machine has been blown, never replace the fuse tube with large amperage (the fuse tube of the charger is generally 2A), and you should focus on checking whether D1-D4, V1, V2, R4, R7, and D15, D21 are damaged, and if they are damaged, they can be replaced with the same type. Please note that when the above components are damaged, one or two of them may be damaged at the same time, and sometimes several of them may be damaged at the same time. It is necessary to check and replace these components one by one before energizing the power supply during maintenance.

Third, serious heat, and even shell burned deformation phenomenon

This is mainly part of the user often carry with the car caused by some components loose caused by the fault. Mainly manifested as: C18 loose soldering, will cause V1, V2 working condition is not normal, the heat is very large, serious charger shell deformation, circuit board burnt, resulting in V1, V2 damage, C18 can be re-welded, check V1, V2, R4, R7. If you still can not rule out the problem, it is necessary to check the D15, D21 in an open-circuit, and in addition, some manufacturers of the output rectifier tube In addition, some manufacturers of output rectifier tube using a double diode, one of the open-circuit also caused by the above failure, sometimes the failure will cause V1, V2 in a damage. Need to check and replace at the same time.

Fourth, the heat is large and accompanied by abnormal sound

The cause of the failure is the output stage damping capacitor R31, C17 damage. In addition, C12 open-circuit or false welding will also cause the above failure.

Fifth, the work of anomalous sound, charging into the power

Check the circuit board C8 whether there is a false weld or damage, general replacement of C8 can be solved.

Six, work with an abnormal sound, power indicator and charging indicator light dark and flashing

The cause of the failure is IC1 damage, be careful when replacing, do not damage the copper foil of the printed circuit board, replace the normal, need to adjust R28 so that the power adapter output voltage in the normal operating range.

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