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
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