Samsung SGH-E1220 Troubleshooting
9. Flow Chart of Troubleshooting
9-1.
Power On
Power On'does not work
'
Check the Battery Voltage
is more than
PMU_VIO
Check the Clock at
XTAL_32K)
(
Yes
3.7V
Yes
=2.8
Yes
UCP200 L19pin
=32
Yes
KHZ
V?
No
No
No
Change the Battery
Check the Main Chip related to
GPIO_2.8V
V
Check the Main Chip
C207(+VGPIO_2.8V
VCORE
+
Check the initial operation
=1.25
END
)="
Yes
_1.25V
V?
Yes
Yes
H"?
No
Check the related circuit
No
Resolder C204, C214 and L201
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
9-2.
Initial
Initial Failure
Yes
UCP200 pin T4(RSTON)="H"?
Yes
CP200pin M4(TRST_N)
U
or D12(SYSRST)
="H"?
Yes
No
Replace UCP200
No
Change PBA
Check the16bit data signal
memory CE
&
Yes
END
9-4
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Flow Chart of Troubleshooting
9-5
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Flow Chart of Troubleshooting
9-6
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Flow Chart of Troubleshooting
9-3.
Charging Part
Abnormal charging part
UCP200 pin V10(VCHG)
UCP200 pin V9(AUX_DET
Yes
>4.9V
Yes
or R303="L"?
Yes
No
Resolder R206
)
No
Resolder or Replace R303
Check the UCP200 pin R9
1.4V
≒
Yes
END
No
Resolder or Replace UCP200
9-7
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Flow Chart of Troubleshooting
9-8
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Flow Chart of Troubleshooting
9-9
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Flow Chart of Troubleshooting
9-4. S
IM Part
pin3 of SIM
Phone can't access SIM Card
Yes
SIM
or R210="H"
After Power ON,
Check SIMCLK Signal on
pin
200
200ina
1, 6
?
Yes
few second
No
Resolder R210, C231
No
Resolder or Replace SIM200
After SIM card insert,
SIM
pin2(SIM_RST)="H"?
200
Check the SIM Card
Yes
No
Replace PBA
Yes
Yes
END
9-10
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