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9. Flow Chart of Troubleshooting
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9-1
9-1. Power On
R302(VREG_MSME)=1.8V?
R301(VREG_MSMP)=2.6V?
R300(VREG_MSMA)=2.6V?
C325(VREG_TCXO)=2.8V?
Yes
Check the initial operation
Yes
No
Check the clock generation circuit
(related to U106)
Check for the clock at C327
= 19.2MHz
Yes
No
Check the PMIC
Yes
END
Yes
No
Check the PMIC
L300(VREG_MSMC)=1.2V?
Yes
No
Resolder OSC300
Check the Clock at
OSC300=32.768KHz
Yes
No
Check the U302 related to PS_HOLD
U302 pin F10(PS_HOLD)
= 2.6V?
Yes
No
Change the Battery
' Power On ' does not work
Check the Battery Voltage
is more than 3.4V