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Level 3 Repair
8-3. Troubleshooting
8-3-1. LOGIC part
8-3-1-1 POWER ON
Power switch on
Check the current
consumption
>= 100mA?
Check the battery
voltage
>= 3.45?
Check the TP_PS_
HOLD pin PS_HOL
D = 2.6V?
Check the clock at
OSC400 = 32KHz?
C432(VREG_MSMC1)=1.2V?
C431(VREG_MSMC2)=1.2V?
C430(VREG_MSME)=1.8V?
C409(VREG_MSMP)=2.6V?
C410(VREG_MSMA)=2.6V?
Check the clock
R403 = 19.2Mhz ?
Check the initial operation
END
NG
Yes
Yes
Yes
Yes
Yes
Yes
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
NO
NO
Change the battery
NO
Check the PMIC
related to PS_HOLD
NO
Resolder OSC400
NO
Check the U401
(open, short, etc)
NO
Check the clock generation circuit
8-4
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