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7. Flow Chart of Troubleshooting
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7-1
7-1. Power On
Check the Battery Voltage
is more than 3.3V
' Power On ' does not work
Change the Battery
END
No
Yes
U500PIN57(PS_HOLD)
= 2.6V?
Check the PMIC related to PS_HOLD
No
Yes
Check the Clock at
OSC501=32KHZ
Resolder OSC501
No
Yes
C536(VREG_MSMC) =
1.375V?
Check the PMIC
No
Yes
C537(VREG_MSME) = 1.8V?
C522(VREG_MSMP) = 2.8V?
C523(VREG_MSMA) = 2.8V?
C515(VREG_TCXO) = 2.8V?
Check the PMIC
No
Yes
Check for the clock at
C422= 19.2MHz
Check the clock generation circuit
(related to OSC200)
No
Yes
Check the initial operation
Yes
Yes