Samsung E590 Troubleshooting
9. Flow Chart of Troubleshooting
9-1. Power On
' Power On ' does not work
Yes
Check the Battery Voltage
is more than 3.7V
Yes
C426(VISA) = 2.6V?
Yes
Check the Clock at
R404=32KHZ
Yes
C404(+VDD_IO_LOW) &
C406(+VDD_IO_HIGH) = "H"?
Yes
No
Change the Battery
No
Check the PMU related to VINT
No
Resolder OSC400
No
Check the related circuit
C204(+VDD_GSM_CORE)
=1.2V?
Yes
Check the initial operation
Yes
END
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No
Check the +VDD_GSM_CORE circuit
9-1
Flow Chart of Troubleshooting
9-2
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9-2. Initial
Flow Chart of Troubleshooting
Initial Failure
Yes
U200 pin C11 (RSTON) ="H"?
Yes
U200 pin F1(RSTEXTn)
Check the 16bit data signal
="H"?
OK?
Yes
&memoryCE
Yes
END
No
Check the circuit related to reset
No
change U200
9-3
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Flow Chart of Troubleshooting
9-4
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9-3. Charging Part
Abnormal charging part
Flow Chart of Troubleshooting
Yes
Check the U402 pin 38
>5.0V
Yes
U402 pin 34(AUX_ON)
="L"?
Yes
Check the U402 pin 36
≒ 1.25V
Yes
END
No
No
No
Check the circuit related to
V_EXT_CHARGE
Check the circuit related to
AUX_ON signal
Resolder or replace U402
9-5
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Flow Chart of Troubleshooting
9-6
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9-4. Sim Part
Phone can't access SIM Card
Yes
CN400 pin 1,5 = "H"?
Yes
Flow Chart of Troubleshooting
No
Resolder or replace U402
After Power ON,
Check SIMCLK Signal on
pin3 of CN400 in a few second
Yes
After SIM card insert,
CN400 pin 2 = "H(SIM_RST)"?
Yes
Check the SIM Card
Yes
END
No
Check the Clock
No
Replace PBA
9-7
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Flow Chart of Troubleshooting
9-8
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9-5. Microphone Part
Microphone does not work
Flow Chart of Troubleshooting
Yes
Check the connection
from MIC FPCB
Yes
Check the circuit
from U200 to MIC FPCB
Yes
END
No
Replace the MIC FPCB
No
Resolder the U803, C833, C834, R808, R812
9-9
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Flow Chart of Troubleshooting
9-10
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9-6. Speaker Part(Melody)
Speaker does not work
Yes
U801 pin 27, 30 = "H"?
Flow Chart of Troubleshooting
No
Resolder or replace U801
Yes
U801 pin 2, 5 ≒ 1.8V?
(When U801 operate)
Yes
SPK600 pin 1,2 ≒ 1.8V?
(When U800 operate)
Yes
Is Speaker working?
Yes
END
No
Resolder U801
No
Resolder SPK600
No
Change the Speaker
9-11
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