Samsung SGH-F110 Troubleshooting
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
Yes
Check the Clock at
R419=32KHZ
Yes
C405(+VDD_IO_LOW) &
C407(+VDD_IO_HIGH) = "H"?
Yes
No
Change the Battery
No
Check the PMU related to VINTC427(VISA) = 2.6V?80
No
Resolder OSC400
No
Check the related circuit
C435(+VDD_GSM_CORE_1V
2) = 1.3V?
Yes
Check for the clock at C129
=26MHz
Yes
Check the initial operation
Yes
END
No
No
Check the +VDD_GSM_CORE circuit
Check the clock generation circuit
9-1
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This Document can not be used without Samsung's authorization
(related to U101)
Flow Chart of Troubleshooting
Typical 1.4V
MES_BATT
+VDD_IO_HIGH_2.8V
+AVDD_2.6V
+VDD_SLEEP_2.8V
+VDD_MAIN_KEY_3.3V
RTC_MP3_OUT
IT_PMU
SIMOFFn
RSTON
REF_ON_PMU
CHARGE_CTRL
32KHz_DIGIT
C443
C423
OSC400
R419
C424
TP400
R421
TP401
TP402
Typical 3.7V
R402
C444
R404
C407
C409
C411
1
OSCI
2
OSCO
3
IRQ
4
SIMCKHC
5
SIMRSHC
6
SIMIOHC/SIMOFF
7
RSTHC
8
GPO3
9
GPO2
10
GPO1
11
PWREN1
12
PWREN2
13
VSS
57
VSS
+VDD_PLL_1.2V
8
9
5
5
C
C
N
N
K
2
3
K
L
C
4
1
6
1
2
5
5
5
T
D
D
A
D
D
B
V
V
V
C
C
1
L
L
D
P
N
C
C
S
S
6
5
1
1
C442
C420
VBAT
C421
+AVDD_HFA_2.6V
SIM_VCC_3.0V
+VDD_RX_TX_2.8V
+VCC_SYN_2.8V
BU_BAT
C426
JACK_IN
AUX_ON
ONKEY_N
+VDD_IO_LOW_1.8V
VBAT
V_EXT_CHARGE
+VBUS_5V
C428
TA401
ZD400
5
6
0
7
8
9
5
5
4
5
4
4
4
4
T
T
D
D
D
D
D
A
A
D
D
D
D
D
B
B
V
V
V
V
1
D
V
2
3
V
V
P
O
I
D
L
D
U405
T
T
D
D
A
A
C
D
B
B
D
X
L
D
D
V
P
C
C
D
7
8
9
1
1
1
K
V
V
V
C
D
D
D
L
A
M
C
C
C
C
D
I
D
S
S
D
S
D
0
2
1
3
3
2
2
2
2
5
0
1
2
3
4
4
4
4
4
4
E
D
D
C
D
V
D
D
C
D
V
V
C
M
I
H
S
D
C
O
I
M
I
S
4
2
D
C
S
R
M
I
S
5
2
V
2
F
R
VBATSENSE
N
E
M
I
S
4
6
5
2
V
1
F
R
CHGCUR
REFGND
MICBIAS
N
E
M
I
S
39
A
VSS
S
V
38
VCHG
37
USBVIN
36
35
REC2
34
REC1
33
32
VISA
31
30
REFC
29
28
ONKEY
27
NTC
+VDD_IO_LOW_1.8V
R420
C427
C429
C405
C406
C408
C410
C416
1
BAT422
2
C425
R423
2.15V
+VDD_IO_HIGH
+VDD_IO_LOW
+VDD_VIB
+VDD_MAIN_KEY
+AVDD
+AVDD_HFA
+VDD_RX_TX
+VCC_SYN
+VDD_GSM_CORE
+VDD_CORE_BT
+VDD_VIB_2.9
PMIC
2.9V
1.8V
2.9V
3.3V
2.6V
2.6V
2.8V
2.8V
1.8V
1.8V
2.9V
VBAT
L401
C434
C435
R400
SCL
SDA
+VDD_GSM_CORE_1.2V
9-2
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9-2. Initial
Flow Chart of Troubleshooting
Initial Failure
Yes
U405 pin 7 (RSTHC) ="H"?
Yes
Check the 16bit data signal
&memoryCE
Yes
END
No
Check the circuit related to reset
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
Abnormal charging part
Check the U405 pin 38
>4.9V
Yes
Yes
Yes
Yes
No
No
Check the circuit related to
Check the circuit related to
V_EXT_CHARGE
V_EXT_CHARGE
U405 pin 34 = "L"?
Yes
Check the U405 pin 46
≒4.2V
Yes
END
No
No
Check the circuit related to
AUX_ON signal
Check the circuit related to
MES_BATT signal
9-6
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+VDD_IO_HIGH_2.8V
+AVDD_2.6V
+VDD_SLEEP_2.8V
+VDD_MAIN_KEY_3.3V
RTC_MP3_OUT
REF_ON_PMU
CHARGE_CTRL
32KHz_DIGIT
IT_PMU
SIMOFFn
RSTON
Flow Chart of Troubleshooting
Typical 3.7V
Typical 1.4V
MES_BATT
C444
C407
C409
C411
C442
C443
C420
R402
R404
+VDD_PLL_1.2V
C423
9
2
1
8
6
5
5
5
5
OSC400
R419
C424
TP400
R421
TP401
TP402
1
2
3
4
5
6
7
8
9
10
11
12
13
57
C
C
N
N
OSCI
OSCO
IRQ
SIMCKHC
SIMRSHC
SIMIOHC/SIMOFF
RSTHC
GPO3
GPO2
GPO1
PWREN1
PWREN2
K
2
3
VSS
K
L
VSS
C
4
1
5
T
D
D
A
D
D
B
V
V
V
C
C
1
L
L
D
D
D
V
N
P
P
C
C
C
S
S
7
5
6
1
1
1
VBAT
TA401
ZD400
4
5
9
8
7
0
4
4
4
5
D
D
D
D
D
D
V
V
V
3
1
P
D
L
D
U405
T
T
A
D
A
B
D
B
X
V
V
L
V
D
D
D
D
C
C
C
C
D
D
D
D
3
0
8
9
5
2
1
1
3
2
6
5
4
4
5
T
T
D
A
A
D
B
B
V
2
V
V
D
A
L
D
C
S
S
1
2
2
2
1
0
4
4
4
4
4
D
D
D
D
V
V
C
O
I
H
D
C
K
C
M
I
S
3
2
E
C
D
D
V
C
D
D
39
A
V
V
V
VSS
2
1
S
M
I
F
F
V
S
R
R
38
VCHG
37
USBVIN
CHGCUR
REC2
REC1
VBATSENSE
VISA
REFGND
REFC
MICBIAS
ONKEY
D
D
C
C
S
N
N
O
I
R
E
E
NTC
M
M
M
M
I
I
I
I
S
S
S
S
4
5
6
4
2
2
2
5
+VDD_IO_LOW_1.8V
R420
36
35
34
33
32
31
30
29
28
27
C427
C429
C405
C406
C408
C410
C416
1
BAT422
2
C425
R423
2.15V
+VDD_IO_LOW_1.8V
+AVDD_HFA_2.6V
SIM_VCC_3.0V
+VDD_RX_TX_2.8V
+VCC_SYN_2.8V
BU_BAT
C421
V_EXT_CHARGE
C426
JACK_IN
AUX_ON
ONKEY_N
+VBUS_5V
VBAT
C428
+VDD_IO_HIGH
+VDD_IO_LOW
+VDD_VIB
+VDD_MAIN_KEY
+AVDD
+AVDD_HFA
+VDD_RX_TX
+VCC_SYN
+VDD_GSM_CORE
+VDD_CORE_BT
+VDD_VIB_2.9
PMIC
2.9V
1.8V
2.9V
3.3V
2.6V
2.6V
2.8V
2.8V
1.8V
1.8V
2.9V
VBAT
L401
C434
C435
R400
SCL
SDA
+VDD_GSM_CORE_1.2V
9-7
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Flow Chart of Troubleshooting
9-4. Sim Part
Phone can't access SIM Card
SIM400 pin 1,5 = "H"?
Yes
No
Check the sim charge pump
Yes
After Power ON,
Check SIMCLK Signal on
pin3 of SIM400 in a few second
Yes
After SIM card insert,
SIM400 pin 2 = "H(SIM_RST)"?
Yes
Check the SIM Card
Yes
END
No
Check the Clock
No
Replace PBA
9-8
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