Huawei's glory X10 can be charged when it is turned off, but not when it is turned on

Huawei’s glory X10 can be charged when it is turned off, but not when it is turned on.

Follow the foot of CC1, we will measure the foot corresponding to the small board seat, and then find out if there is a ground diode connected to it on the small board.

After that, because the blind test was mixed up, the diodes of both cc channels were simply removed. Boot test, perfect repair.

Model: Huawei Glory X10

Fault phenomenon: it can be charged when turned off, but not when turned on.

Fault analysis: This kind of fault is mostly caused by the damage of dp dm data circuit, cc1, cc2 accessory identification circuit and accessory identification chip.

Maintenance process:

Received a glory X10, which can be charged when it is turned off and plugged in, but it can’t be charged when it is unplugged and plugged in after it is turned on.

Huawei’s glory X10 can be charged when it is turned off, but not when it is turned on. Maintenance Figure 1

Huawei’s glory X10 can be charged when it is turned off, but not when it is turned on. Maintenance Figure 2

Measure the resistance values of dp, dm, cc1 and cc2 first, and they are all normal.

Huawei’s glory X10 can be charged when it is turned off, but not when it is turned on. Figure 3

When the charger is turned off, cc1 and cc2 are all about 1V. When the charger is turned on, cc1 and cc2 are all about 1V. When the charger is unplugged and then plugged in, there is no charging sign. At this time, cc1 actually has 5v voltage.

Huawei’s glory X10 can be charged when it is turned off, but not when it is turned on. Figure 4

However, the cc1 channel only has a current limiting resistor R2609 and a charging ic U2601.

Huawei’s glory X10 can be charged when it is turned off, but not when it is turned on. Maintenance Figure 5

At this time, we don’t need to change the resistors and chips in a hurry, because only when the charging cable is plugged and unplugged after startup will the abnormal voltage come out, and no protective diode is found in cc1 channel, so we look to the small board.

Huawei’s glory X10 can be charged when it is turned off, but not when it is turned on. Figure 6

Huawei’s glory X10 can be charged when it is turned off, but not when it is turned on. Figure 7

Follow the foot of CC1, we will measure the foot corresponding to the small board seat, and then find out if there is a ground diode connected to it on the small board.

After that, because the blind test was mixed up, the diodes of both cc channels were simply removed.