Samsung S5500, SGH-S5500 Troubleshooting
9. Flow Chart of Troubleshooting
9-1. Power On
' Power On ' does not work
Yes
Check the current consumption more than 100mA
Yes
Check the VBAT
more than 3.3V
Yes
Check D600
DC Resistance,solder
Yes
VDDE C421=1.8V ?
VADC C420=2.65V ?
VRAD C418=2.8 V ?
Yes
Check CLK32K
R401 = 32KHz
Yes
Check the pin #15 of U102
Check the pin #1 of OSC101
Yes
Check the initial operation
Yes
END
No
Download again
No
Check the Battery
No
Resolder D600
No
Replace U402
No
Check the clock
OSC400 , C413 , C414
No
Check the U102 , OSC101
9-1
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Flow Chart of Troubleshooting
9-2
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Flow Chart of Troubleshooting
9-3
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Flow Chart of Troubleshooting
9-2. Initial
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Initial |
Failure |
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Yes |
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U402 pin M2 (RESET/) ="H"? |
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No |
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Check |
the circuit related to reset |
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(check the |
test point) |
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(If it has |
U402 |
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some problem, replace it) |
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Yes
Check the 16bit data signal & memory CE
Yes
END
9-4
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Flow Chart of Troubleshooting
9-5
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Flow Chart of Troubleshooting
9-3. Charging Part
Abnormal charging part
Yes
Check the pin#11(>4.5V) and pin#2(=low) of the U503
Yes
Check the pin#10(=low) of the
U503
Yes
Check the pin#4(=low) of the
U503
Yes
END
No
check the TA and battery connection.
No
Replace the U503
No
Replace the UCP303
9-6
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Flow Chart of Troubleshooting
9-7
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Flow Chart of Troubleshooting
9-8
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Flow Chart of Troubleshooting
9-4. Sim Part
Phone can't access SIM Card
Yes
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No |
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Check the SIMVCC R617 |
= 3.0V |
Check U402, R617 |
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Check the SIMCLK C619 |
No |
Check C619 , U402 |
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Is there a clk ? |
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(if it has some problems, replace it) |
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Yes |
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Check the SIM connector's |
No |
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resolder or change SIM600 |
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connector's to SIM card |
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Yes
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No |
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Check the circuit around SIM600 |
Check the related circuit of SIM600 |
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input circuitry |
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Yes |
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END
9-9
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This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-10
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Flow Chart of Troubleshooting
9-5. Microphone Part
Microphone does not work
Yes
No
Check the connection
Resolder MIC
from MIC
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No |
Check L702,C743,U402 |
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Check the MIC_BIAS_2V2 |
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at L702, C743= 2.2V ? |
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(If it has problem, replace it) |
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Yes |
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Check L703,C731,C733 |
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No |
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Resolder L703,C731,C733 |
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connection |
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Yes
END
MIC_BIAS_2V2
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20 |
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7L |
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MIC700 |
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8 |
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1 |
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37C |
POWER |
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C731 |
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GND1 |
2 |
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GND2 |
3 |
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MIC_N |
OUT |
4 |
C733 |
MIC_P |
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3 |
L703 |
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47C |
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7C 93
9-11
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