9.
Flow Chart of Troubleshooting
9-1
9-1. Power On
Check the Battery Voltage
is more than 3.4V
' Power On ' does not work
Change the Battery
END
No
Yes
U201PIN57(PS_HOLD)
= 2.6V?
Check the PMU related to PS_HOLD
No
Yes
Check the Clock at
OSC600=32KHZ
Resolder X1
No
Yes
C628(VREG_MSMC) =1.375V?
Check the PMIC
No
Yes
C626(VREG_MSME) = 1.8V?
C622(VREG_MSMP) = 2.6V?
C620(VREG_MSMA) = 2.6V?
Check the PMIC
No
Yes
Check for the clock at
C223= 19.2 MHz
Check the clock generation circuit
(TCXO200)
No
Yes
Check the initial operation
Yes
Yes
Summary of Contents for SGH-Z310
Page 37: ...8 PCB Diagrams 8 1 8 1 PCB Top Diagram ...
Page 38: ...PCB Diagrams 8 2 8 2 PCB Bottom Diagram ...
Page 41: ...Flow Chart of Troubleshooting 9 3 ...
Page 45: ...Flow Chart of Troubleshooting 9 7 ...
Page 67: ...Flow Chart of Troubleshooting 9 29 ...