Flow Chart Of Troubleshooting - Samsung SGH-Z150 Service Manual

7. Flow Chart of Troubleshooting

7-1. Power On
' Power On ' does not work
Check the Battery Voltage
is more than 3.3V
U200 pin57(PS_HOLD)
= 2.6V?
Check the Clock at
OSC200=32KHZ
C228(VREG_MSMC)
= 1.3V?
C225(VREG_MSME) = 1.85V?
C219(VREG_MSMP) = 2.6V?
C217(VREG_MSMA) = 2.6V?
C210(VREG_TCXO) = 2.85V?
Check for the clock at
C518= 19.2MHz
Check the initial operation
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
END
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No
Change the Battery
No
Check the PMIC related to PS_HOLD
No
Resolder OSC200
No
Check the U200(PMIC)
No
Check the U200(PMIC)
No
Check the clock generation circuit
(related to TCX700)
7-1