Samsung SGH-M2310, GT-M2310 TSHOO
9. Flow Chart of Troubleshooting
Power On
9-1.
Power On'does not work
'
Yes
Check the Battery Voltage
is more than
Check the Clock at
OSC300
C300(+VDD_IO_LOW)
VDD_IO_HIGH)="H"?
C305(+
VDD_GSM_CORE)
C328(+
=1.2
=32
V?
3.4V
Yes
KHZ
Yes
Yes
Yes
No
No
&
No
No
Check the+VDD_GSM_CORE circuit
Change the Battery
Resolder OSC
Check the related circuit
300
Check for the clock at
MHz
=26
Yes
Check the initial operation
Yes
END
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No
9-1
Check the clock generation circuit
related to
(
U300)
Flow Chart of Troubleshooting
9-2
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9-2.
Flow Chart of Troubleshooting
Initial
Initial Failure
CP200 RSTON
U
TP_RSTON) is"High"?
(
Yes
CP200RSTEXTn
U
TP_EXT) is"High"?
(
OK?
Yes
Check the16bit data signal
memory CE
&
END
Yes
No
No
Check the circuit related to reset
CheckUCP
or change the PBA
200
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
Charging Part
9-3.
Abnormal charging part
Yes
Check the U302 pin
>4.9V
Yes
U302 pin
Check the U302 pin
="
≒
END
AUX_ON)
34(
Low"?
1.2V
Yes
Yes
36
38
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
Sim Part
9-4.
Phone can't access SIM Card
SIM
300
Yes
pin1is"High"?
Yes
No
Check the circuit related to SIM300
SIM
SIM
pin3(SIMCLK)is working?
300
After SIM card inserted,
pin2(SIMRST) is"High"?
300
Check the SIM Card
END
No
Check the UCP200 or Change the PBA
Yes
No
Check the UCP200 or Change the PBA
Yes
Yes
9-8
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Flow Chart of Troubleshooting
9-9
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Flow Chart of Troubleshooting
Microphone Part
9-5.
Microphone does not work
Check the MIC connection
Yes
No
Resolder MIC
Yes
Check the circuit
fromUCP
Check F505 PIN1(JACK_IN)
is'High'
MIC is working?
200
END
to MIC
Yes
?
Yes
Yes
No
No
No
Resolder the R409,R410,C416,C418
Check the JACK_INsignal
Replace the MIC
9-10
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Flow Chart of Troubleshooting
9-11
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Flow Chart of Troubleshooting
Speaker Part(Melody)
9-6.
Speaker does not work
U401 pin F4
U403 pin E4, E5
Yes
=2.9
Yes
≒
V?
1.8
V?
No
Resolder or replace U401
No
Resolder or replace U401
Yes
Speaker is working?
Yes
END
No
Change the Speaker
9-12
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Flow Chart of Troubleshooting
9-13
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Flow Chart of Troubleshooting
Key Data Input
9-7.
Check Initial Operation
When one of the keys is
pressed,
is it displayed on LCD?
Yes
No
Check the Dome sheet
Yes
END
9-14
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Flow Chart of Troubleshooting
9-15
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