iPhone 6s Plus has no signal repair

iPhone 6s Plus has no signal repair

Machine model: iPhone 6s Plus
Malfunction: There is no signal on the phone.

iPhone 6s Plus has no signal repair Figure 1.

Fault analysis: there is no signal in the mobile phone, so it is necessary to distinguish whether there is no signal received or no signal transmitted. Problems with chips connected by RFFE bus will also be caused.
Maintenance process:no serviecs is displayed by card insertion detection, and operators are available. Operators can be found manually.

iPhone 6s Plus has no signal repair Figure 2.

Then the problem may be that in the launching part, the mainboard was found to have been repaired after disassembling.

iPhone 6s Plus has no signal repair Figure 3.

First, eliminate the problem of U_WTR_RF RF IC chip, and the replacement failure remains the same. The replacement of 2G power amplifier is still the same. When you see that there is a mobile diversity receiving UDIVA_RF chip in your home, you can directly replace it.

iPhone 6s Plus has no signal repair Figure 4.

Test, startup signal is back to normal, call is normal, function is normal, and maintenance is over.

iPhone 6s Plus has no signal repair Figure 5.

iPhone 6s Plus has no signal repair Figure 6.

The fault is that the mobile phone has no signal due to the damage of the diversity receiving UDIVA_RF chip.