Flow Chart Of Troubleshooting; Power On - Samsung SGH-Z230 Service Manual

9. Flow Chart of Troubleshooting

9-1. Power On

' Power On ' does not work
Check the Battery Voltage
U501 pin57(PS_HOLD)
C517(VREG_MSME) = 1.8V?
C520(VREG_MSMP) = 2.6V?
C522(VREG_MSMA) = 2.6V?
C515(VREG_TCXO) = 2.85V?
Check for the clock at
Check the initial operation
Yes
is more than 3.3V
Yes
= 2.6V?
Yes
Check the Clock at
OSC500=32KHZ
Yes
C516(VREG_MSMC)
= 1.2V?
Yes
Yes
R206= 19.2MHz
Yes
Yes
END
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No
No
Check the PMIC related to PS_HOLD
No
No
Check the U502(PMIC)
No
Check the U502(PMIC)
No
Check the clock generation circuit
9-1
Change the Battery
Resolder TCX200
(related to TCX200)