OPPO Reno6 has no 4G signal after entering water

OPPO Reno6 has no 4G signal after entering water

Machine model: OPPO Reno6

Fault phenomenon: after water damage, there is no 4G signal, but 2G signal.

Fault analysis:water damage machine, first look for corrode, mainly power amplifier and VCC.

Repair process: after dismantling the machine, no trace of corrode was found on the signal part on the front of the main board.

OPPO Reno6 has no 4G signal after entering water Figure 1.

But there are two corrode traces on the back of the motherboard.

OPPO Reno6 has no 4G signal after entering water Figure 2.

power amplifier bottom pin on the left are VCC and corrode.

OPPO Reno6 has no 4G signal after entering water Figure 3.

The upper part is the main VCC, and the lower part is 1.8V. The Capacitor corrode is seriously damaged, and the brush will fall off. The bottom pin diode value is also disconnected.Jump wire is used for power borrowing.

OPPO Reno6 has no 4G signal after entering water Figure 4.

The mobile phone has no 4G signal but 2G signal.

OPPO Reno6 has no 4G signal after entering water Figure 5.

Let’s look at another corrode, which is the power amplifier power supply.

OPPO Reno6 has no 4G signal after entering water Figure 6.

The upper part is the main VCC, and the lower part is 1.8V.corrode drops pin, and diode value ol is used for Jump wire power borrowing.

OPPO Reno6 has no 4G signal after entering water Figure 7.

Start up test again, perfect repair.

OPPO Reno6 has no 4G signal after entering water figure 8.