Sunday, January 22, 2017
How to repair dead phone has shorting
How to repair dead phone has shorting
What is Shorthing
Dead Case with Shorting
We will learn about shorting this theory is not according to the electronics here we will try to understand how we will deal a mobile phone that comes in shorted position. The main problem due to shorting is often seen is Dead case and some time it drain the battery and also we face a problem that the phone turns on only with charger and if we unplug the charger phone goes to switch off.
How to test with Multimeter
We will first put your multimeter in continuity mode and we have to leads (prob) one is Red called positive (+ve) prob and another black is negative (-ve) .
In Above shown pic we have a battery connector have three terminal in most of the mobiles we will get the three terminals first is (-ve) second is BSI called Battery Signal Indicator and last one is (-ve).
Now we go through checking of a mobiles PCB we will place red prob at +ve terminal and black prob to the -ve terminal and our multimeter is set on continuity mode we can use a meter that have a buzzer inbuilt and set it to buzzer mode now the display of multimeter will show 0 we will hear the sound of beep that mean the PCB is short but we will confirm this with reverse testing now place the black prob on -ve and red prob on -ve again we will hear the same beep sound from multimeter and we will see the 0 on multimeter display now it is clear the phone PCB is shorted.
In next post we will learn about leakage then after we will go through rectification process.
You may also like to read our Chapter One
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