iPhone 6 has no sound and WiFi cannot be used for repaired

Machine model: iPhone 6

Malfunction: the phone has no sound, and WiFi can’t be used

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 1.

Maintenance process: After the test, the coder problem was exactly as described by the customer. After removing the motherboard, it was found to be Previously repaired machine.

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 2.

coder is surrounded by Flux.

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 3.

AUDIO CODEC IC has solder beads on the side, but there is no Flux.

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 4.

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 5.

Capacitor on the side of AUDIO CODEC IC is indispensable. Look at BTB connector on the back under the microscope.

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 6.

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 7.

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 8.

Remove the size coder, make up the missing Capacitor, measure the pin bits of PAD, and find that or so CLK of small coder is broken,AUDIO CODEC IC Diode value is normal.

iPhone 6 has no sound and WiFi cannot be used for repaired Figure 9.

iPhone 6 has no sound and WiFi cannot be used for repaired figure 10.

Jump wire connects pin bits of coder, puts the chip back, and starts the test.

iPhone 6 has no sound and WiFi cannot be used for repaired figure 11.

Here’s the problem. The backlight will not display.

iPhone 6 has no sound and WiFi cannot be used for repaired figure 12.

After measuring short-circuit, the screen of 5.7V Inductor lit up, and went into the system test, the sound problem was perfectly repaired, but the rear camera could not be turned on, and the measuring 2.85V VCC was disconnected.