#2样品分析步骤：1、检查充电盒连接USB线可以正常充电，但是无法给耳

Step # 2 Sample Analysis: <br>1. Check the USB cable connected to the charging case can be normally charged, but can not be charged to the headphone, measured using a multimeter probes charging case no charging 5v output. <br>2, dismantling charging case, measuring the charging voltage of the battery box 4.0V, the battery voltage is normal, the charging case measured using a multimeter PCBA board boost IC output pin has 5v output, measured in conjunction with the boosting IC output trunk and branch found 3.33V voltage has dropped, an abnormal voltage, the drain member has a branch. <br>3, the ESD tube removal line D4 bit number, the normal charging case can normally be charged to the headphone, the replacement of the tube D4 bit number of ESD, the charging case is still normal. <br>4, the test does not turn on the right headphone earphone found, and no light during charging. <br>5, the quiescent current test board PCBA normal headset, the battery capacity test is normal. Replacement of the normal rechargeable battery and the headset can be used to boot. (Defective battery dimensions have already returned profits help to confirm the analysis is expected to December 17 responses) (see annex battery capacity test)

#2样品分析步骤:<br>1, check the charging case connected USB cable can be normal charging, but can not charge the headset, use the universal meter to measure the charging case charging probe no 5v output.<br>2, disassembling the charging box, measuring the charging case battery voltage of 4.0v, battery voltage is normal, the use of the meter to measure the charging case PCBA board boost IC output foot has 5v output, in the boost IC output trunk and branch of the combination point measurement found that the voltage has dropped to 3.33v, voltage anomalies, branch components leakage.<br>3, remove the line D4 bit number of the ESD tube, the charging box returned to normal, can normally charge the headset, replace the new D4 bit number of the ESD tube, the charging box is still normal.<br>4, test headset found that the right headset does not turn on, and charging when no light.<br>5, test headphone PCBA board static current is normal, battery capacity test is normal. The headset can charge properly and start-up properly after replacing the new battery. (The defective battery has been sent back to Viduli to assist in the confirmation analysis, expected to reply on December 17) (Battery capacity test see annex)

#2. Sample analysis steps:<br>1. Check that the USB cable connected to the charging box can charge normally, but the headset cannot be charged. Use a multimeter to measure that the charging probe of the charging box has no 5V output.<br>2. Disassemble the charging box, measure the battery voltage of the charging box as 4.0V, and the battery voltage is normal. Use a multimeter to measure the 5V output of the boost IC output pin of the PCBA board of the charging box. At the junction of the boost IC output main circuit and the branch circuit, it is found that the voltage has dropped to 3.33v, the voltage is abnormal, and there is component leakage in the branch circuit.<br>3. After unplugging the ESD pipe with D4 digit in the line, the charging box returns to normal, and the headset can be charged normally. After replacing the new ESD pipe with D4 digit, the charging box is still normal.<br>4. The test headset found that the right headset does not turn on, and there is no indicator light when charging.<br>5. The static current and battery capacity of PCBA board are normal. After replacing the new battery, the headset can be charged normally and can be turned on and used normally. (the defective battery has been sent back to viduli for confirmation and analysis, and it is expected to reply on December 17) (see the attachment for battery capacity test)