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2. SGH-Z130 Flow Chart of Troubleshooting
2-1.Baseband
2-1-1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥ 100mA ?
Check Voltage ≥ 3.3V ?
The pin #3 of D500
is high ?
The pin #3,5 of U500
≥ 3.3V ?
Check U500
pin #32 ≒ 1.37V ?
pin #36 ≒ 1.8V ?
pin #50,56 ≒ 2.6V ?
pin #84 ≒ 2.85V ?
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YES
YES
YES
YES
YES
Check the initial operation
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NO
NO
NO
NO
NO
U500 Check
Pin #53 ≒
19.2MHz?
Vpp ≥ 500mV?
YES
2- 1
Download again
Charge the Battery
Check D500
Check the path of
D500 and U500
Check the U500
NO
check the OSC801
END
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