Honor play 3 mobile phone no booting repair

Honor play 3 mobile phone no booting repair

Machine model: Honor Play3
Malfunction: mobile phone no booting, press the power-on key to indicate that there is no electricity, but the battery VCC is normal, and it can be turned on by turning on the current.

Honor play 3 mobile phone no booting repair figure 1.

Fault analysis: This kind of fault and the fault of Xiaomi starting up with an empty battery sign are all battery VCC detection problems. Besides battery id and battery temperature detection pin,VCC detection circuit for battery positive electrode and Huawei mobile phone battery negative electrode detection circuit are also available.
Maintenance process: Since DC power supply can be turned on and Won’t Turn On is the battery, the battery id and temperature detection are ruled out. According to Boardview, it can be seen that the positive electrode of the battery is connected to the main power supply.

Honor play 3 mobile phone no booting repair figure 2.

Measure that Capacitor next to the power supply and the positive electrode of battery BTB connector have been OL.

Honor play 3 mobile phone no booting repair figure 3.

Measure Capacitor Diode value is normal on Related circuit next to the power supply.

Honor play 3 mobile phone no booting repair figure 4.

Directly from Capacitor Jump wire to the detection point above battery BTB connector.
Maintenance result: boot test, perfect repair.

Honor play 3 mobile phone no booting repair figure 5.