Samsung SGH-M620, SGH-M620N TSHOO
10. Flow Chart of Troubleshooting
10-1.
10-1-1.
Baseband
Power ON
Power On' does not work
'
Check the current consumption
Current consumption
>= 100
Check the Vbat Voltage
Voltage
Check the pin of UCD300
Pin#A6
Pin#D6
Yes
mA
Yes
>=3.3V
Yes
:1.8V
:2.9V
No
No
No
Download again
Charge the Battery
Check UCD300
and
C339
C338
Yes
Pin#M7
Freq
Vpp
≒
:2.9V
=26
>=300
900
Yes
END
:1.8V
Yes
MHz
mV
mV
Pin#L8,#P4
Check the clock signal at Pin#21of RFT100
Vrms
Check the initial operation
Yes
No
No
Check UCD300
C300,C301,C303
Check the clock generation circuit
relatedtoOSC
(
Pin#19, Pin#20
101,
)
10-1
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Flow Chart of Troubleshooting
C302
C337
C300
C301
C338
C325
C331
C336
C335
C334
L
3
0
0
C322
V
9
.
2
_
D
C
C
V
V
8
.
1
_
D
C
C
V
6
3
3
C
T
C
3
0
4
C314
RTX_Q_N
RTX_Q_P
7
3
3
C
-
L
D
C
C
3
3
3
3
2
3
VAPC
TXPSTB
8
3
3
C
F
-
1
6
1
0
0
3
C328
C329
ZD602
R
K
P
S
D
D
V
1
1
L
V
D
D
V
5
8
L
K
L
O
I
T
_
C
D
O
D
A
V
_
D
D
V
VCCD_1.8V
4
P
O
I
_
D
D
V
C303
VCCA_2.8VVCCD_2.9V
K3
RXTXQN
K4
RXTXQP
H5
TXP
L5
TXPSTB
P13
USB_CARKIT_D_N
P12
USB_CARKIT_D_P
C10
USB_CHRG
A6
VLDO_1
D6
VLDO_2
E14
VLDO_AUD
F12
VLDO_AUX1
D14
VLDO_AUX2
C15
VLDO_COREA
B15
VLDO_COREA_S
C12
VLDO_COREB
D13
VLDO_COREC
9
3
3
C
6
K
S
S
S
S
V
V
8
K
UCD300
B
D
D
D
S
N
N
S
G
G
V
1
1
9
1
K
K
N
S
S
S
Q
D
N
G
0
4
1
F
E
S
S
D
N
G
6
F
S
S
D
D
D
D
D
D
N
N
N
N
N
N
G
G
G
G
G
G
0
1
7
8
9
1
1
F
F
F
F
F
ADC_AUX1
ADC_AUX2
ADC_AUX3
ADC_AUX4
ADC_AUX5
ADC_AUX6
ADC_AUX7
ADC_AUX8
ADC_AUX9
C300
7
M
D
D
V
2
5
4
1
1
1
1
N
N
D
C
D
D
A
1
D
D
D
V
V
D
V
UCD300
C301 C302
0
5
2
1
1
K
P
N
B
D
C
D
D
B
1
D
D
D
V
V
D
V
OSC100
1
2
HOT
GND1
GND2
HOT
4
C
C
C
2
3
3
0
0
3
7
3
9
C320
2
2
E
A
X
1
C321
G
-
C319
C324
8
O
S
C
U
C
D
3
0
0
C323
C
C
C
3
3
1
1
0
5
C
3
C
2
3
7
C
3
1
1
TH300
C
3
1
2
3
1
3
C
3
3
0
9
1
1
B
N
I
F
E
R
RFT100
3
L102
RTX_Q_N
RTX_Q_P
3
1
2
0
2
2
P
N
I
O
F
_
E
F
R
E
R
4
2
2
2
Q
B
Q
B
Q
B
_
RX1900B
C
C
V
RX1900
RX1800B
RX1800
RX900B
RX900
5
2
6
2
7
2
8
2
9
2
0
3
C109
PCS_LNA_IN_P
PCS_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
GSM_LNA_IN_P
GSM_LNA_IN_N
R101
CLK26M_DBB
C107
C112
C113
P
C
1
1
6
C
8
X
C
R
1
1
1
1
1
5
C
1
1
4
6
5
9
D
A
C10 0 C101
C
C
R
1
1
1
0
0
0
6
8
2
O
S
C
1
2
0
R100
C
1
1
7
Z
C
1
0
0
1
0
0
F
T
L102
R101
C107
10-2
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R
C
1
0
9
Flow Chart of Troubleshooting
10-1-2.
Initial
The Pin#A6 of UCD300
the Pin#D6 of UCD300
Is the RST Pin#P5 of
UCD300"Low→High"
There is
forms at the
Initial Failure
Yes
and
1.8V
2.9V ?
Yes
Yes
kHz wave
32.768
C323
of OSC300
and
=
=
?
C324
No
No
No
if it has some problem, it is to be replaced.)
(
if it has some problem, it is to be replaced.)
(
Check the UCD300
Check the UCD300
Check the UCD300
Yes
Is the SIMRST Pin#B5 of
UCD300
Yes
The voltage is"High" at the
C300,C301,C302,
LCD display is O.K
Sound is O.K
C303
Yes
Yes
Yes
END
No
Check the UCD300
No
Check theUCD300
No
Check the LCD part
No
Check the AUDIO part
10-3
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Flow Chart of Troubleshooting
B6
SIM_CLK
E6
SIM_IO
B5
SIM_RST
N5
UP_CLK
L6
UP_IO
M6
UP_RST
E3
VRFLDO_1
F3
VRFLDO_2
F2
VREF
CNTL_EN_CSP
HV_CHRG
BATKELV
PSW1_BUF
RTC_CLK
SCUSTB
SCANTST
RING_DRV
VIB_DRV
VIB_RNG_EN
SYSCLK
SYSCLKEN
RESETN
RESET_O
VAMICREF
VAMICRTN
VAREF
VAREFRTN
VAVCM
VAVCMLSH
VAVCMRTN
CSN_PSC
CREF
FBSW
VACC
VEXT
VRTC
SCAN
X1RTC
X2RTC
P1
N9
D10
G5
AFC
N7
AINT
B11
F1
L9
DINT
B12
B13
LX
D3
L300
NC1
L10
R3
P3
C9
A12
F5
C5
VSIM
N4
K7
E8
E9
L7
N6
R6
R4
P5
G4
G3
K13
K10
K12
J11
L14
F13
K11
M10
P10
CNTL_DAT_CSP
UCD300
SIM_CLK
SIM_IO
SIM_RST
SIM1_CLK
SIM1_DATA
SIM1_RST
CNTL_DAT_CSP
CNTL_EN_CSP
AFC
AINT
DINT
PSW1_BUF
RTC_CLK
SCUSTB
MOTOR_EN
VIB_RNG_EN
CLK26M_ABB
CLK_REQ
FLASH_RST
RST
VAMICREF
C322
C325
UP_CS
VSYN_2.8V
C310
C314
VBAT
C315
VRF_2.9V
C311
DCDC_OUT
GND_SW
VSIM
BAT300
C323
R306
C312
S
O
P
G
E
N
OSC300
C313
VCCA_2.8VVCCD_2.9V
C316
1
C300
C301 C302
VCCD_1.8V
C303
2
4
5
2
0
5
1
2
5
4
1
K
D
C
A
1
B
1
D
D
D
V
D
V
8
1
1
1
L
P
K
L
P
N
L
V
R
D
B
D
D
D
D
V
V
O
O
I
I
T
D
K
_
_
C
P
D
D
D
O
S
V
D
D
A
D
V
V
_
D
D
V
D
V
C324
ADC_AUX1
ADC_AUX2
ADC_AUX3
ADC_AUX4
ADC_AUX5
ADC_AUX6
ADC_AUX7
ADC_AUX8
ADC_AUX9
7
1
1
N
M
N
D
D
D
D
V
V
1
C
D
D
V
UCD300
C302
C337
C300
C301
C338
C325
C331
C336
C335
C334
L
3
0
0
C322
T
C
3
0
4
C314
C
C
C
2
3
3
0
0
3
7
3
9
C320
F
-
L
D
2
2
E
-
1
6
1
A
X
1
C321
G
-
C319
C324
O
S
C
0
0
U
C
D
3
3
0
0
C323
C
C
C
3
3
3
3
3
C328
2
C329
ZD602
C
C
C
3
3
3
1
1
1
0
5
3
C
C
3
3
C
2
3
3
7
0
3
1
1
TH300
C
3
1
2
10-4
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Flow Chart of Troubleshooting
10-1-3.
Sim Part
Insert SIM is displayed on the LCD
"
Yes
Check the SIM connector's
SIM600) connection to
(
SIM card
Yes
Check the voltage at
Pin#11 of SIM600
Is there any signals
Pin#13,#15,#16 of SIM600
>= 2.9V ?
Yes
No
Resolder or change SIM
No
No
?
Check the UCD300
Check the UCD300
600
Yes
Check the SIM Card
END
10-5
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This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
SD_DET
SD_CMD
SD_CLK
SD_D(0)
VSIM
SIM_RST
SIM_CLK
SIM_IO
C604 C608
C605
C606
C607
R612
R613
U600
1
IO1
2
GND
3
IO24IO3
IO5
IO4
VSD_2.8V
1
SW-B
2
SW-A
3
1
4
2
5
3
6
4
7
5
8
6
9
7
10
8
11
C1
12
C5
13
C2
14
C6
15
C3
16
C7
17
NC
18
NC
19
NC
20
NC
6
5
21
NC
22
NC
23
NC
SIM600
UCD300
SIM_CLK
SIM_IO
SIM_RST
UP_CLK
UP_IO
UP_RST
VRFLDO_1
VRFLDO_2
VREF
B6
E6
B5
N5
L6
M6
E3
F3
F2
SIM_CLK
SIM_IO
SIM_RST
SIM1_CLK
SIM1_DATA
SIM1_RST
10-6
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