Samsung SGH-M2310, GT-M2310 TSHOO
9. Flow Chart of Troubleshooting
9-1. Power On
' Power On ' does not work
Yes
Check the Battery Voltage
is more than 3.4V
Yes
Check the Clock at
OSC300=32KHZ
Yes
C300(+VDD_IO_LOW) &
C305(+VDD_IO_HIGH) = "H"?
Yes
C328(+VDD_GSM_CORE)
= 1.2V?
Yes
Check for the clock at
= 26MHz
Yes
Check the initial operation
Yes
END
No
No
No
No
No
Change the Battery
Resolder OSC300
Check the related circuit
Check the +VDD_GSM_CORE circuit
Check the clock generation circuit (related to U300)
9-1
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Flow Chart of Troubleshooting
9-2
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Flow Chart of Troubleshooting
9-2. Initial
Initial Failure
UCP200 RSTON (TP_RSTON) is "High"?
Yes
UCP200 RSTEXTn (TP_EXT) is "High"?
OK?
Yes
Check the 16bit data signal & memory CE
Yes
END
No
Check the circuit related to reset
No
Check UCP200 or change the PBA
9-3
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Flow Chart of Troubleshooting
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 U302 pin 38 > 4.9V
Yes
U302 pin 34(AUX_ON) = "Low"?
Yes
Check the U302 pin 36
1.2V
Yes
END
No
No
No
Check the circuit related to V_EXT_CHARGE
Check the circuit related to AUX_ON signal
Resolder or replace U302
9-6
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Flow Chart of Troubleshooting
9-7
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Flow Chart of Troubleshooting
9-4. Sim Part
Phone can't access SIM Card
Yes
No
SIM300 pin 1 is "High"? |
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Check the circuit related to SIM300 |
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Yes
No
SIM300 pin3 (SIMCLK) is working? |
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Check the UCP200 or Change the PBA |
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Yes |
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After SIM card inserted, |
No |
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Check the UCP200 or Change the PBA |
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SIM300 pin 2(SIMRST) is "High"? |
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Yes
Check the SIM Card
Yes
END
9-8
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Flow Chart of Troubleshooting
9-9 |
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Flow Chart of Troubleshooting
9-5. Microphone Part
Microphone does not work
Yes
Check the MIC connection
Yes
Check the circuit from UCP200 to MIC
Yes
Check F505 PIN 1(JACK_IN) is ' High' ?
Yes
MIC is working?
Yes
END
No
Resolder MIC
No
Resolder the R409,R410,C416,C418
No
Check the JACK_IN signal
No
Replace the MIC
9-10
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Flow Chart of Troubleshooting
9-11
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Flow Chart of Troubleshooting
9-6. Speaker Part(Melody)
Speaker does not work
Yes
No
U401 pin F4 = 2.9V? |
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Resolder or replace U401 |
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Yes
No
U403 pin E4, E5 1.8V? |
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Resolder or replace U401 |
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Yes
No
Speaker is working? |
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Change the Speaker |
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Yes
END
9-12
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Flow Chart of Troubleshooting
9-13 |
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Flow Chart of Troubleshooting
9-7. Key Data Input
Check Initial Operation
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Yes |
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When one of the keys is |
No |
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Check the Dome sheet |
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pressed, |
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is it displayed on LCD? |
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Yes
END
9-14
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Flow Chart of Troubleshooting
9-15
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