iPhone 7 Weak WIFI Signal Issue

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Malfunction Phenomenon

iPhone 7 Weak WIFI Signal Issue, this iPhone 7 just can receive several hotspots signal, less than the normal phone.

 

Trouble Shooting

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 In order to exclude possible failure of external accessories, we used a tweezers as an antenna to connect with WIFI antenna buckle (JUAT_RF), but the WIFI signal was still the same. Then we can conclude that the problem was from the motherboard, we checked the motherboard carefully, and we found the relevant area of WIFI circuit had been burned.

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We move the “antenna” to resistor R7704_RF, here we can get many hotspots signal, it means that WIFI module was normal.

Then we moved the tweezer to the resistor R6711_RF, also normal. We continue to move the “antenna” to resistor R6705_RF, signal was abnormal, some hotspots disappeared, we can conclude that the main reason of the issue was PPLXR_RF.

For this issue, normally, we can jump a wire from from JUAT1_RF to R6711_RF. 

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We jumped a wire and test again, problem resolved.

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iPhone 7 Motherboard Repair Course

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REWA Academy

As an enthusiastic educator and expert in mobile technology, REWA Academy has dedicated its career to empowering individuals through technical education. With a keen focus on cellphone repairs, they have developed comprehensive online and offline courses at REWA Academy. Their expertise spans a wide array of areas, including iPhone repair training, phone hardware, software, and advanced troubleshooting techniques. Through their writings, they aim to demystify mobile technology complexities, making it accessible and understandable for both novices and professionals in the field.

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