Samsung SGH-B3310, GT-B3310 TSHOO
9. Flow C hart of Troubleshooting
9-1.
Power On
Power On'does not work
'
KEY FPCB or KEY Dome
Check the current
consumption more than
Check the Voltage of Battery
Voltage of C300=VBAT
damaged?
100
more than
Yes
mA
Yes
No
3.3V
Yes
Yes
No
No
No
?
Replace Key FPCB
Download again
Check the Battery
Check the related circuit
Yes
Check the VCCD_1.8V,
VCCD_2.9V and
VCCD_1.2V_A of UCP200
Yes
Check VRF_2.9V of RFT100
Yes
Check CLK26M_DBB on C113
Freq
Check the initial operation
=26
MHz
Yes
Yes
No
Check the related circuit
No
Check the UCD300 and C339, C100,
C103
No
Check OSC100 and RFT100
END
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
9-4
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Flow Chart of Troubleshooting
9-2.
Initial
Initial Failure
Yes
RST="H"?
check the R230)
(
Yes
END
No
Check the circuit related to reset
9-5
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Flow Chart of Troubleshooting
9-6
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Flow Chart of Troubleshooting
9-7
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Flow Chart of Troubleshooting
9-3.
Charging Part
Abnormal charging part
Check the Voltage Of L300.
Check the U300 pin
under
under
5.0V?
0.4
Yes
Yes
V?
Yes
No
4.
No
Check the circuit related to
VBUS_OUT_5V
Check the circuit related
Check the R300
R316
&
=4.3
Replace u300
END
=3.6
Kohm?
Yes
Kohm?
No
Replace R300, R316
9-8
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Flow Chart of Troubleshooting
9-9
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Flow Chart of Troubleshooting
9-4.
Sim Part
Check the VSIM_2.9V of SIM300
Phone can't access SIM Card
Yes
2.9V
Yes
Check the circuit around SIM300
input circuitry
Yes
END
No
Check the circuit related
No
Check the related circuit of SIM300
9-10
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Flow Chart of Troubleshooting
9-11
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Flow Chart of Troubleshooting
9-5.
Microphone Part
Microphone does not work
Check the connection
from MIC
Check the circuit
from UCD3
VAMICREF
00 to
On booting,
≒
Yes
Yes
Yes
2.5V ?
MIC
No
No
No
Resolder MIC
Check the path from Main IC to MIC
Check UCD300
Yes
Check the MIC
Yes
END
No
Replace the MIC
9-12
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