Huawei P20 No 4G Si...
 

[Sticky] Huawei P20 No 4G Signal Repair  

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Hassan Al-sayed Ali
(@hassan4arab)
Member Admin
Joined: 2 weeks ago
Posts: 45
05/01/2020 7:20 am  

Exclusive on the Global Mobile Forum :Mobile1tech.net

Huawei P20 No 4G Signal Repair

 

Mobile phone failure: no 4g signal, sometimes

no 2g signal due to water entering

The disassemble found that there is a signal-related chip on the

charging connector small board that is a bit corroded and reloaded.The

appearance of the motherboard was not found to have obvious corrosion marks.

When observed under the microscope, it was found that there was a small Shielding cover on the back of the Amplifier (RF PMU) , and the shield was removed. It was found that the resistance of the Amplifier VCC (RF PMU) was severely corroded at one end,and the resistance was short. Repair it.

image

image

حصرياً على منتدى الجوال العالمي Mobile1Tech.net إصلاح مشكلة شبكة ال4G لهاتف هواوي P20

سبب المشكلة : وقوع الهاتف بالماء 

خطوات الحل :بعد فك الجهاز لاحظنا وجود أكسدة في المنطقة التي تحتوي آيسي تغذية دارة الشبكة RF PMU

وعلى جانب الايسي  هنالك دارة عليها حماية معدنية نقوم بفك الحماية المعدنية بواسطة الكاوي

نلاحظ وجود ملف التغذية الخارج من RF PMU لتغذية مكبرات طاقة الإشارة وكان هذا الملف تالفاً

فقط نقوم بعمل جمبر للملف ويتم الحل 

 

 

 


Quote
Alaa
 Alaa
(@alaajaber)
Eminent Member
Joined: 2 weeks ago
Posts: 27
08/01/2020 9:21 pm  

Very Good


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