[self study course of mobile phone maintenance] the whole process of domestic vivo X20 rear camera maintenance without taking pictures
Li Xuepeng 2021-06-09 14:50:06

Share a peer maintenance case Domestic machine VIVO X20 The rear camera doesn't take photos, the whole process of maintenance

Vivo x20 The machine fell heavily and the rear camera didn't take pictures , It's normal , When switching , The display camera is damaged . My colleagues sent me , Change the screen by yourself , Send us the main board fault .

Take off and observe , The motherboard is seriously deformed , Take off the camera , Measure the resistance of the interface , It is found that there is a resistance value too large , A zero resistance value . Look at it through the bitmap , Find out , These two feet go straight through CPU.

[ Mobile phone maintenance self-study course ] Domestic machine VIVO X20 The rear camera doesn't take photos, the whole process of maintenance


Direct degumming , It's gone CPU, Under a microscope , Nine drops . Fly line , Green oil solidifies , reinstall CPU, The test fault remains the same , Then measure the resistance of the foot , One resistance is too high .

[ Mobile phone maintenance self-study course ] Domestic machine VIVO X20 The rear camera doesn't take photos, the whole process of maintenance


Take it down again CPU, measurement CPU Corresponding to the resistance value of the foot position , Find out 700 many ( Diode measurement ) Basically normal . No more power on , The current is fixed 80 Ma .

The second time CPU It doesn't work ,CPU Close to the hard disk , Flip the hard drive and reload it , electric current 140-30-50.

then CPU And the hard disk , electric current 10-50-60.

[ Mobile phone maintenance self-study course ] Domestic machine VIVO X20 The rear camera doesn't take photos, the whole process of maintenance


Because both power supplies are in CPU Back , Next, remove both power supplies . Install the main power supply first PM660, 30-40-50, And then they put on PM660A Small power supply , electric current 30-40-50-70; Then install CPU, Hard disk . Testing, troubleshooting , We'll pack it up and send it away .

[ Mobile phone maintenance self-study course ] Domestic machine VIVO X20 The rear camera doesn't take photos, the whole process of maintenance


reflection :

Manual work is not good , I can't stand many twists and turns , Maintenance requires perseverance , No fear of failure . No more , Experience and skill is to improve in making mistakes . It is also very important to report the risk of a fallen machine to the customer . Welcome friends to share their own maintenance cases and experience .

Learning with you for life , This is brother Yang. He says maintenance . Welcome to pay attention to us , Share with each other .

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