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9. Flow Chart of Troubleshooting
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9-1
9-1. Power On
Yes
Yes
Check the PMIC
No
END
Check for the clock at
C507= 19.2 MHz
Check the initial operation
Check the clock generation circuit
(TCX201)
No
Yes
No
Yes
Yes
Check the PMIC
L500(VREG_MSME) = 1.8V?
C531(VREG_MSMP) = 2.6V?
C518(VREG_MSMA) = 2.6V?
C526(VREG_TCXO) = 2.8V?
L501(VREG_MSMC) =1.375V?
No
Resolder OSC500
Check the Clock at
OSC500=32.768KHZ
Yes
No
Check the PMU related to PS_HOLD
U500 PIN57(PS_HOLD)
= 2.6V?
Yes
Change the Battery
No
Check the Battery Voltage
is more than 3.4V
Yes
' Power On ' does not work
Содержание SGH-Z400
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