Samsung S5500, SGH-S5500 Troubleshooting
9. Flow Chart of Troubleshooting
9-1.
Power On
Power On'does not work
'
Check the current consumption
more than
Check the VBAT
DC Resistance,solder
VDDE C421=1.8V
VADC C420=2.65V
VRAD C418=2.8
more than
Check D600
Yes
100
Yes
Yes
Yes
3.3V
mA
V?
No
Download again
No
Check the Battery
①
No
Resolder D600
②
?
?
No
Replace U402
Yes
Check CLK32K
R401
Check the pin
Check the pin#1of OSC101
Check the initial operation
=32
END
Yes
#15
Yes
Yes
KHz
of U102
No
No
③
Check the clock
OSC400,C413,C414
④
Check the U102,OSC101
9-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-2
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-3
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-2.
Initial
Initial Failure
Yes
U402 pin M2(RESET/
check the test point)
(
Check the16bit data signal
memory CE
&
END
)="
Yes
Yes
H"?
No
①
Check the circuit related to reset
If it has some problem, replace it)
(
U402
9-4
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-5
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-3.
Charging Part
Abnormal charging part
Check the pin#11(>4.5V) and
pin#2(=low) of the U503
Check the pin#10(=low) of the
U503
Yes
No
check the TA and battery connection.
Yes
①
No
Replace the U503
Yes
②
Check the pin#4(=low) of the
U503
Yes
END
No
Replace the UCP303
9-6
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-7
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-8
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-4.
Sim Part
Check the SIMVCC R617
Phone can't access SIM Card
Yes
=3.0V
Check the SIMCLK C619
Is thereaclk
?
Yes
No
No
①
Check U402, R617
if it has some problems, replace it)
(
Check C619,U402
if it has some problems, replace it)
(
Check the SIM connector's
connector's to SIM card
Yes
Check the circuit around SIM600
input circuitry
Yes
END
②
No
resolder or change SIM600
No
Check the related circuit of SIM600
9-9
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-10
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
9-5.
Microphone Part
Microphone does not work
Check the connection
from MIC
Check the MIC_BIAS_2V2
at L702, C743=
Yes
2.2V ?
Yes
No
No
①
②
Resolder MIC
Check L702,C743,U402
If it has problem, replace it)
(
MIC700
POWER
POWER
GND2GND1
GND2GND
OUT
OUT
Check L703,C731,C733
connection
No
Resolder L703,C731,C733
Yes
END
MIC_BIAS_2V2
2
0
7
L
8
3
7
1
3
4
L703
3
4
7
C
C731
C733
C
MIC_N
MIC_P
9
3
7
C
9-11
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Loading...