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9-1
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9. Flow Chart of Troubleshooting
9-1. LOGIC
9-1-1. Power On
Power switch on
Download
Yes
NG
Check the current
consumption
>= 100mA?
NO
Check the battery
voltage
>= 3.45?
NO
Change the battery
Check the PMIC
related to PS_HOLD
Check the TP_PS_
HOLD pin PS_HOL
D = 2.6V?
NO
Check the clock at
OSC400 = 32KHz ?
NO
Resolder OSC400
Check the U401
Yes
C420(VREG_MSMC1)=1.2V?
C418(VREG_MSMC2)=1.2V?
C417(VREG_MSME)=1.8V?
C410(VREG_MSMP)=2.6V?
C409(VREG_MSMA)=2.6V?
NO
Check the clock
C148 = 19.2Mhz ?
NO
Check the clock generation circuit
Yes
Yes
Yes
Yes
Check the initial operation