
SAMSUNG Proprietary-Contents may change without notice
9. Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-1
9-1. Power On
Check the Battery Voltage
is more than 3.4V
' Power On ' does not work
Change the Battery
END
No
Yes
U401 PIN57(PS_HOLD)
R409 = 2.6V?
Check the PMIC related to PS_HOLD
No
Yes
Check the Clock at
OSC400=32.768KHZ?
Resolder OSC400
No
Yes
L400(VREG_MSMC) =1.2V?
Check the PMIC
No
Yes
L401(VREG_MSME) = 1.8V?
C424(VREG_MSMP) = 2.6V?
C423(VREG_MSMA) = 2.6V?
C416(VREG_TCXO) = 2.8V?
Check the PMIC
No
Yes
Check for the clock at
C407= 19.2 MHz
Check the clock generation circuit
(TCX200)
No
Yes
Check the initial operation
Yes
Yes
Содержание SGH-A801
Страница 43: ...8 PCB Diagrams 8 1 8 1 Main PCB Diagram Top ...
Страница 44: ...PCB Diagrams 8 2 Bottom ...