Easy way to understand Light section | All mobile light problem fix

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Inside the display battery connector are 3 points of light. One is anode and one is cathode and the third point is pm out. The anode is the plus point and the cathode is the minus point. Pm out is the line of the signal.

Where A is written in the diagram, it will mean anode and where K is written it will mean cathode.

The signal line is sometimes also written lcd_cabc in the diagram.

A plus always has one line, a minus has more than one line, and a signal always has only one line. So if you can see more lines of the light section inside the display connector, then one of them will be plus and one will be signal and the rest of the lines will be all negative lines i.e. cathode lines.

Main trick = which is a plus point for lighting the final light, which is formed after the entire light section is completed, it passes through the doid and more voltage is generated there.

So suppose if the display connector for the light in the motherboard is bad or the connector inside the folder is bad, then you can open the display and put a jumper wire on the direct diode and put it on the plus point of the light of the display, this will also light up the light inside the display And proper work will be done.

which is a plus point for lighting the final light, which is formed after the entire light section is completed, it passes through the doid and more voltage is generated there.

So suppose if the display connector for the light in the motherboard is bad or the connector inside the folder is bad, then you can open the display and put a jumper wire on the direct diode and put it on the plus point of the light of the display, this will also light up the light inside the display And proper work will be done.

What are the things you need to check when the light goes off?

The VPH_PWR line is required to run the light section which comes from the power IC. To check this line, first of all you have to connect the battery and do not turn on the phone.

After that, wherever the VPH line is going, you have to check the voltage there, as much as your battery is charged, you will get the same voltage on the VPH line.

If the same voltage is coming on both sides of the coil, then the coil is correct and if the SAME voltage of the VPH line is not coming on both sides of the coil, then the coil has to be changed.

MAIN POINT = If your phone is off then at that time the plus point of the display connector should draw as much voltage as is present inside your battery.

when the phone is turned on, the boost voltage should come at the plus point of the display connector, which will be more than 10 volts. This condition is absolutely right for the phone, if you do not get this condition then it means there is a problem in the light section.

The way to check all the lines of the – key inside the display connector is that you have to put the multimeter on continuity mode and all the lines of minus have to be checked with the continuity mode of the multimeter if it is giving a beat So the line is correct and if the beef is not serving then the line is bad.

To check this, you need a diagram, in the diagram you will know that the minus lines in the display connector are going to which components, you can attach the multimeter wire to those components with the help of continuity mode. You can check the line.

The signal line sometimes comes from the display connector, sometimes from the CPUC and sometimes from the power IC. The way to check this is that you have to turn on the phone first, then after keeping the multimeter in voltage mode, check the voltage on this line, if 1.8 volts is coming on this line then this signal line is absolutely correct. And if there is no voltage coming on this line then the signal line is not correct.

So the final thing is that if you want to fix the light section then it is very easy to fix the light section but if you do not have a diagram then this task will be very difficult for you so use diagram to fix the light section Sure do it.