Flow Chart Of Troubleshooting - Samsung SGH-P960 Service Manual

Flow Chart of Troubleshooting

9.
9. Flow Chart of Troubleshooting
9-1.Logic
9-1-1. Power on
Power On does not work
YES
Check the current
consumption is
More than 100mA
Check the Battery Voltage
is more than 3.3v
YES
Check D400 pin
(PS_HOLD)=2.6V
YES
Check the Clock at
OSC400=32KHz
YES
C422(V_MSMC_1.2)=1.2V?
YES
C419(V_MSME_1.8V)=1.8V?
C417(V_MSMP_2.6V)=2.6V?
C416(V_MSMA_2.6V)=2.6V?
C427(V_TCXO_2.85V)=2.85V
YES
Check for the clock at
OSC100 Pin #3=19.2MHz
YES
Check the initial operation
YES
END
NO
YES
NO
NO
NO
NO
NO
NO
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DOWN LOAD
Change the Battery
Check the PMIC realated to PS_HOLD
Resolder OSC400
Check the U401
Check the U401
Check the clock generation circuit
9-1