iPhone 6 screen failure repair

iPhone 6 screen failure, black Touch to touch the IC weld dot soldering, the flying line is normal.

iPhone 6 screen failure repair

Failure model: iPhone 6
Phenomenon: The screen is out of order.

Maintenance process:

One iPhone 6, screen touch sometimes works, sometimes it doesn’t.

iPhone 6 screen failure repair
iPhone 6 screen failure repair figure 1.
Measure the 5.1V and 1.8V VCC of 343S0694 when the touch fails.

iPhone 6 screen failure repair

iPhone 6 screen failure repair figure 2.

Measure ±5.7V and 1.8V VCC of BCM5976C1.

iPhone 6 screen failure repair

iPhone 6 screen failure repair figure 3.

After measuring the above conditions are normal, remove BCM5976C1 IC, and when measuring the ground value of PAD,PAD has Inveracious Soldering, and disconnect pin bit of Inveracious Soldering.

IMG_256

iPhone 6 screen failure repair figure 4.

Jump wire again.

IMG_256

iPhone 6 screen failure repair figure 5.

After flying, the touch function is stable.

252;IMG_261

iPhone 6 screen failure repair figure 6.