2. SGH-X300
Flow Chart of Troubleshooting
2-1
2-
1. Baseband
2-1-1. Power ON
check the current
consumption
>= 100mA
Download again
'Power ON' does not work
No
Yes
Yes
END
Yes
Check the Initial Operation
Yes
Charge the battery
No
Check the Voltage
of the Battery
>= 3.3V
check keypad
No
Check the pin C152,
C153,C155,C168 of
U107 is
>=2.8V
Check
"Power On"
key?
No
check
U200
and
C200
Yes
1
Check the clock signal at
pin #4 of OSC100
Freq=26Mhz,
Vrms >=300mV
No
Check the clock generation
circuit OSC100
Yes
2
Summary of Contents for SGH-X300
Page 10: ...SGH X300 Flow Chart of Troubleshooting 2 6 ...
Page 14: ...SGH X300 Flow Chart of Troubleshooting 2 10 1 2 ...
Page 17: ...SGH X300 Flow Chart of Troubleshooting 2 13 1 2 3 4 5 ...
Page 19: ...SGH X300 Flow Chart of Troubleshooting 2 15 1 2 3 4 5 ...
Page 21: ...SGH X300 Flow Chart of Troubleshooting 2 17 1 2 3 4 5 ...
Page 24: ...SGH X300 Flow Chart of Troubleshooting 2 20 4 2 2 1 3 ...
Page 26: ...SGH X300 Flow Chart of Troubleshooting 2 22 4 2 2 1 3 ...