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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
U400PIN57(PS_HOLD)
= 2.6V?
Check the PMU related to PS_HOLD
No
Yes
Check the Clock at
OSC400=32KHZ
Resolder OSC400
No
Yes
C428(VREG_MSMC) =1.375V?
Check the PMIC
No
Yes
C426(VREG_MSME) = 1.8V?
C422(VREG_MSMP) = 2.6V?
C420(VREG_MSMA) = 2.6V?
C242(VREG_TCXO) = 2.8V?
Check the PMIC
No
Yes
Check for the clock at
C224= 19.2 MHz
Check the clock generation circuit
(OSC200)
No
Yes
Check the initial operation
Yes
Yes
Summary of Contents for SGH-ZV50
Page 36: ...8 PCB Diagrams 8 1 Top ...
Page 37: ...PCB Diagrams 8 2 Bottom ...