Troubleshooting.pdf

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9. Flow Chart of Troubleshooting
9-1-1. Power ON
'Power On' does not work
Check the current consumption
Yes
Current consumption
>= 100mA
Yes
Check the Vbat Voltage
No
Download again
Voltage >=3.3V
Yes
Check the pin of UCD300
No
Charge the Battery
Pin#A6 : 1.8V
Pin#D6 : 2.9V
No
Check UCD300 and C339,C340
Yes
Pin#M7 = 2.9V
Pin#L8 = 1.8V
Yes
Check the clock signal at pin#12 of RFT100
Check UCD300 and
No
Yes
C300,C301,C303
Freq = 26MHz
Vrms >=300mV
Vpp
≒
1000mV
Yes
Check the initial operation
No
Check the clock generation circuit
(related to OSC100,Pin9,Pin10,)
END
9-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-2
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This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-1-2. Initial
Initial Failure
Yes
The pin #A6 of UCD300 =
1.8V and
the pin #D6 of UCD300 =
2.9V ?
No
Check the UCD300
(if it has some problem, it is to be replaced.)
Yes
Is the pin #P5 of UCD300
"Low
→
High" ?
No
Check the UCD300
(if it has some problem, it is to be replaced.)
Yes
There is 32.768kHz wave
forms at the C324 and C325
No
Check the UCD300
Yes
Check the UCD300
The voltage is "High" at the
C300,C301,C302,C303
No
Yes
No
LCD display is O.K
Check the LCD part
Yes
No
Sound is O.K
Check the Audio part
Yes
END
9-3
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-4
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-1-3. Sim Part
"Insert SIM is displayed on the LCD
Yes
Check the SIM connector's
(SIM500) connection to
SIM card
No
Resolder or change SIM500
Yes
Check the voltage at pin#1
of SIM500 >= 2.9V ?
No
Check the UCD300
Yes
Is there any signals
pin#2,#3,#4 of SIM500 ?
No
Check the UCD300
Yes
Check the SIM Card
END
9-5
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization

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