IPhone 6 common mobile phone troubleshooting tips
Time: 2018-08-31 Reads: 369 Edit: Admin
Methods/steps
1. If the heating power supply current of the iphone 6 hard disk does not start up, remove the C0617 capacitor next to the hard disk;
2: the clamping power of iphone 6 does not leak, and the trigger is set at about 1.4a, which is usually A short circuit of hard disk 3.0v power supply;2
3. The most common non-charging method is the virtual welding of charging IC U1401.3
4: after the iphone 6 falls, no handset, no phone, no ring tone, automatically and hands-free. Solution: first add welding or reset ring tone amplification IC U1601; second, check the main audio working conditions.Replanting or replacement as appropriate;4
5: feed water startup current around 100MA needs to be replaced by power source IC U1201. If current is at 70MA, audio and display IC are not considered online.5
6: mobile payment NFC U5301_RF virtual welding leads to the dead machine being restarted, adding welding or replanting this IC(the machine that has been dropped) will lead to a 99% error.6
7: the virtual welding of audio U0900 will lead to white apple, and then the audio IC can be replanted (the machine that has fallen).7
8: the WIFI chip of iphone 6 is a low-temperature chip. It is suggested to use a brand new one for replacement. It is easier to damage the chip when it is removed.8
9: the American V version iphone 6 phone card cannot be connected to the Internet. It must be wiped off the iphone and activated with data traffic when installing the telecom card.9
10. If the temperature of iphone 6 is too high, the battery should be first considered, followed by the temperature detection circuit (4 groups) and power supply.10
The loss of 16.5V of fingerprint interface will lead to the error reporting of 53, which needs to be replaced by fingerprint IC. (fingerprint 3.0v power supply is directly from the power supply, and 3.0v without 1.8v can be removed from the fly line, and the power supply can be replaced directly without 3.0v.
12: power leakage current around 2000-300ma occurs when power leakage occurs and large short circuit is generally U1501 showing power source IC damage, which can only be solved by replacement. Welding and replanting are not possible (the chip itself is damaged);12
13: the charging current is about 800MA. The short circuit of the positive voltage of the main power supply will burn out the flash IC U1602 and the display power IC U1501.13
14: when the iphone6 is changed separately, the CPU will report an error by swiping the phone 53. An error in the WIFI bottom will cause an error 10.14
15: antenna switch U_ASM_RF: above is my 4 capacitors, the resistance value of which is very low. It is only 6 ohms.15
16: the current on the iphone6 single board is normal, and the button screen does not display the peripheral inductance damage of J2019 display interface (measure the lamp control resistance first to quickly determine the fault point);16
17: iphone6 touch can not be used if the replacement of U2401 and U2402 does not solve the problem, it is CPU virtual welding (first check whether the touch is positive or negative 5.7v and 5.1v power supply, and the condition is satisfied when considering the black screen touch again white touch);