Samsung galaxy Not 2 GT-N7100 Power On Not Working Solution

Samsung galaxy Not 2 GT-7100 Power On Not Working Solution Schematic,Circuit,Diagram

Samsung galaxy Not 2 GT-N7100 Power On Not Working Solution Step By Step

Step1

Cell-phone can`t power on.

Step 2

Check the Battery Voltage.

Is it more than 3.4V?

Charging the battery by TA.

If its voltage level is extremely low(under 3.0V),

Change the battery.

Step 3

Power-on the phone and check

the power-on sound

or motor biration.

Sound or Biration is ok?

Change the FRONT-OCTA LCD ASSY

Step 4

Check the HDC601

Change the HDC601(Power-key)

And retry to the power-on operation.

Step 5

Check the U500 output voltage

(C552 = 1.1V, C550 = 1.0V,

C549 = 1.0V, C547 = 1.0V)

If the output voltage is not satisfied with normal

condition, Change the U501.

※ Each voltage will be changed from 0.9V to

1.3V during booting.

Step 6

Check the U500 output signal

(AP_PS_HOLD(TP) > 1.8V)

If the output voltage is not satisfied with normal.

condition, Change the U500.

※ Each voltage level has ±10% margin.

Step 7

Check the Clock OSC500(C506)

Is that frequency 32Khz?

Change the OSC500.

If OSC400 does not still work, Change the U501

This problem is internal oscillator of U501.

※ Test condition (Oscilloscope setting)

: 20.0us.div (time division)

Step 8

check the initial operation

Step 9

END

Unofficial Support Site For This Phone By welcome Zone Haldwani 

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