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Troubleshooting
No Power
Step Check point Result value Defect point
1 Confirm the defect symptom - -
2
* * Analyse reasons of No-Power using the
Power & Current test jig Power test mode.
PASS
Battery, Battery terminal,
Physical Key
Leakage Current fail Go to the step 2.1
Power On Current fail Go to the step 3
2.1
Check the Resistance between JIG Power
V_Battery / VPH_PWR/ V_BAT and Ground.
(C4009,C4083)
Normal (Over dozens of KΩ)
Go to the step 5
Abnormal Capacitors for ESD protection
3 It’s possible to enter the download mode?
Y e s Go to the step 3.1
No Go to the step4
3.1 Check if it’s rooted.
Rooted OOW
Normal S/W update
4 Try to do the boot recovery.
Pass Go to the step 3
Fail Go to the step 5
5 Check the voltage of L4012
L4012, L4009 = 5V Go to the step 6
If not the correct value Replace the U4003
6 Check the voltage of C4035(=PMIC Output)
C4035 = 2.1V Go to the step 7
If not the correct value Replace the U4001
** Usage guide of the Power & Current test jig has been uploaded at GSPN. (Power & Current Tester_Rev4_141226.pdf)
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