Sharp SGH-C130 - Manual (Page 35)

SAMSUNG Proprietary-Contents may change without notice
10. Flow Chart of Troubleshooting
10-1
This Document can not be used without Samsung's authorization
10-1.Baseband
10-1-1. Power ON
'Power On' does not work
Voltage >=3.3V
Download again
Charge the Battery
Pin#J12 >= 2.8V Check U107 and C173
Pin#A13 and
pin#A14 =2.8V
Check U107 and C174
Freq = 13MHz
Vrms >=300mV
Vpp≒ 900mV
Check the clock generation circuit
(related to OSC100)
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#G11 =
1.8V
No
Yes
Check the current consumption
Check the Vbat Voltage
Check the pin of U107
Check the clock signal at pin#8 of U102
Current consumption
>= 100mA
①
②
③
④