Samsung C230 Troubleshooting 04
7. Flow Chart of Troubleshooting
7-1. Power On
The set is not ' Power On '
Check the current consumption
Current consumption
>=100mA
Yes
Check the +VBATT Voltage
Voltage >= 3.3V
Yes
Check the pin of U300
pin#J12 of U300 >= 2.8V
Yes
pin#A13 of U300 = 2.8V
Yes
No
No
No
No
pin#G11 = 1.8V
Download again
Charge the Battery
Check U300 and C314
No
Check U300 and C315
Check the clock signal
at pin#3 of U102
Freq = 26MHz ,
Vrms ≥ 300mV
Yes
Check the initial operation
END
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Yes
7-1
No
Check the clock generation circuit
(related to U102)
Flow Chart of Troubleshooting
7-2
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7-2. Initial
Flow Chart of Troubleshooting
Initialization Failure
Yes
The pin#G11 of U300 = 1.8V
the pin#J12 of U300 ≒ 2.825V
Is the pin#K9 of U300
32.768kHz wave forms at
the C216 and C217
The Voltage is "High" at
and
?
Yes
"Low -> High"?
Yes
Yes
the C313
No
No
No
No
(If it has some problem, adjust it.)
(If it has some problem, adjust it.)
Check the U300
Check the U300
Check the U200
Check the U300
Yes
No
LCD display is O.K
Yes
No
Sound is O.K
Yes
END
Check the LCD Part
Check the Audio Part
7-3
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Flow Chart of Troubleshooting
7-4
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7-3. SIM Part
"Insert SIM" is displayed on the LCD
Yes
Are there any Signals at
pin#N9, #R10, #P10 of U300?
Yes
Flow Chart of Troubleshooting
No
Check the U200
Are there any Signals at
pin#K12, #K11, #K14, #J11 of
CN100?
Yes
Check the SIM Card
END
No
Check the U300
7-5
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Flow Chart of Troubleshooting
7-4. Charging Part
Abnormal charging operation
The pin#17, #18 of
CN701 is TA_VEXT ≒
The pin#8 of U301 is 3.2~4.2V ?
The ICHRG = 1.4V(during
charging) and ≒ 180mV(full
5V ?
Yes
Yes
charging) ?
Yes
No
Replace TA or Check CN701
No
Check the U301
No
Solder again or change R310
END
7-6
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Flow Chart of Troubleshooting
7-7
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