Samsung C230 Troubleshooting 04
7. Flow Chart of Troubleshooting
7-1. Power On
The set is not ' Power On '
Check the current consumption |
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Current consumption |
No |
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Download again |
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>=100mA |
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Yes
Check the +VBATT Voltage
No
Voltage >= 3.3V |
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Charge the Battery |
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Yes
Check the pin of U300
No
Check U300 and C314
pin#J12 of U300 >= 2.8V
Yes
pin#A13 of U300 = 2.8V
No
No
Yes
pin#G11 = 1.8V |
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Check U300 and C315 |
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Yes
Check the clock signal |
No |
at pin#3 of U102 |
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Freq = 26MHz , |
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Vrms ≥ 300mV |
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Check the clock generation circuit (related to U102)
Yes
Check the initial operation
END
7-1
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Flow Chart of Troubleshooting
7-2
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Flow Chart of Troubleshooting
7-2. Initial
Initialization Failure
Yes
The pin#G11 of U300 = 1.8V and
the pin#J12 of U300 2.825V
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Yes
Is the pin#K9 of U300 "Low -> High"?
Yes
32.768kHz wave forms at the C216 and C217
Yes
The Voltage is "High" at the C313
Yes
LCD display is O.K
Yes
Sound is O.K
Yes
END
No
Check the U300
(If it has some problem, adjust it.)
No
Check the U300
(If it has some problem, adjust it.)
No
Check the U200
No
Check the U300
No
Check the LCD Part
No
Check the Audio Part
7-3
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Flow Chart of Troubleshooting
7-4
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Flow Chart of Troubleshooting
7-3. SIM Part
"Insert SIM" is displayed on the LCD |
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Yes |
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Are there any Signals at |
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No |
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Check the U200 |
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pin#N9, #R10, #P10 of U300? |
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Yes |
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Are there any Signals at |
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No |
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pin#K12, #K11, #K14, #J11 of |
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Check the U300 |
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CN100? |
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Yes
Check the SIM Card
END
7-5
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Flow Chart of Troubleshooting
7-4. Charging Part
Abnormal charging operation
No
The pin#17, #18 of
CN701 is TA_VEXT 
Replace TA or Check CN701 5V ?
Yes
No
Check the U301
The pin#8 of U301 is 3.2~4.2V ?
Yes
The ICHRG = 1.4V(during |
No |
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charging) and 180mV(full |
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Solder again or change R310 |
charging) ? |
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Yes
END
7-6
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This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
7-7 |
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This Document can not be used without Samsung's authorization
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