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What Are The Frequent Failures Of The Quick Chargers?

Edit:Shenzhen Keyuantai Industry Co.,Ltd      Date:Sep 07, 2017

What are the frequent failures of the Quick Chargers?
To these failures, how can I solve, please look down:
        First, the power indicator light when charging, charging indicator orange
First check the Quick Chargers output plug and the battery compartment charging plug is not tightened. If there is no problem, check the fuse box above the fuse box is open or the fuse holder has loose contact bad phenomenon. In addition, some models to open the battery lock before charging. If the above failures are ruled out, consider whether the Quick Chargers output line is open, can be used multimeter voltage block (200V block) to measure the Quick Chargers no-load output voltage, should be 41-44V (with 36V battery due to Quick Chargers different Different), if not, may be Quick Chargers output line open, and the Quick Chargers to open, for an output line, you can troubleshoot. Note: In the replacement of Quick Chargers output line, be sure to pay attention to the positive and negative of the original machine do not reverse.
       Second, the output voltage is high
The output voltage is high (greater than 50V), the cause of the failure is C15 short circuit or R26 open circuit, the specific judgment can be measured IC1 IC "1" pin voltage.
Note: After replacing R26, adjust R28 to keep the Quick Chargers output voltage normal.
        Third, the power indicator does not light, charging light is not bright
Check the Quick Chargers input power plug and the utility power is not connected, you can quickly plug the input plug into the normal power outlet try, as the case remains, the Quick Chargers shell open, observe the machine fuse there is no Off, if not broken, first check the power input line is good, in the exclusion of power input line fault, you should check the circuit board near the high voltage area of the components are Weld, the fuse seat is not bad, Check whether the transformer T1, transistor V1, V2, etc. Weld phenomenon. In addition, R5 or R6 open circuit, but also cause the failure, such as the machine fuse has been broken, then do not replace the large amps fuse tube (Quick Chargers fuse tube is generally 2A), should focus on check D1-D4, V1 , V2, R4, R7 and D15, D21 for damage, if damaged, the same type of replacement can be used. Please note that the above components may be damaged at the same time one or two damage, and sometimes may damage several at the same time, maintenance need to check one by one, replace these components before powering.
        Four, Quick Chargers serious fever, and even shell shelling deformation phenomenon
This is mainly part of the user often carry the parts caused by loose parts caused by the failure. Mainly as follows: C18 loose Weld, will cause V1, V2 working state is not normal, Quick Chargers great heat, serious when the rapid charger shell deformation, circuit board char, lead to V1, V2 damage can be re-welded C18, Check V1, V2, R4, R7. If you still can not troubleshoot, you need to check D15, D21 whether there is an open circuit, in addition, some manufacturers output rectifier with a double diode, Quick Chargers one of which also caused the failure of the road, and sometimes the failure will cause V1, V2 One is damaged. Need to be checked and replaced at the same time.
        Five, Quick Chargers large heat and accompanied by abnormal sound
The cause of the fault is due to damage to the output stage vibration suppression resistance R31, C17. In addition, C12 open or Weld can also cause the above failure.
        Six, the work of abnormal sound, Quick Chargers into the electricity
Check whether the circuit board C8 Weld or damaged, the general replacement C8 can be resolved.
        7, the work of abnormal sound, power indicator and charging indicator light and flashing
The cause of the malfunction is IC1 damage, be careful when replacing, do not damage the printed circuit board copper foil, replace the normal, the need to adjust the R28 to make the Quick Chargers output voltage within the normal working range.
        Eight, the output voltage is normal, but the charging current is very small
Check R30, R11, R13 whether the contact is bad or damaged, such as the normal replacement IC1 can be troubleshooting.

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