User Guide
SAMSUNG Proprietary-Contents may change without notice
SGH-C120 Flow Chart of Troubleshooting
2-7
This Document can not be used without Samsung's authorization
C218
0
1
N
K
L
C
_
0
M
S
X
A
T
A
D
_
0
M
S
X
2
1
U
XTIC_MODE
D12
F
E
R
V
X
0
1
F
P16
XPA4/OEN
P15
XPA5/WAITN
T15
XPA6/BE1N
M9
XPA7/IRQ1
XPA8/IRQ2
T5
P2
XPA9/IRQ3
5
R
1
M
W
P
X
E8
XRTCALARM_N
0
M
I
_
0
3
A
P
X
3
F
1
E
1
M
I
_
1
3
A
P
X
4
1
H
N
0
S
C
_
2
3
A
P
X
A
Q
E
R
_
T
_
3
3
A
P
X
7
1
N
7
1
M
B
Q
E
R
_
T
_
4
3
A
P
X
3
1
L
2
2
A
_
5
3
A
P
X
N
5
S
C
_
3
2
A
_
6
3
A
P
X
5
1
N
N14
XPA3/CS4N
2
M
W
P
/
3
2
A
P
X
6
H
3
M
W
P
/
4
2
A
P
X
5
H
3
M
0
M
O
_
5
2
A
P
X
2
G
1
M
O
_
6
2
A
P
X
K
L
C
_
1
M
S
_
7
2
A
P
X
4
G
5
G
0
M
O
I
_
8
2
A
P
X
1
F
1
M
O
I
_
9
2
A
P
X
XPA2/CS3N
M11
0
X
R
/
6
1
A
P
X
3
L
4
E
0
Q
R
D
_
7
1
A
P
X
3
1
P
K
C
A
_
T
_
8
1
A
P
X
2
L
I
S
O
M
_
P
C
/
9
1
A
P
X
XPA1/CS2N
M14
O
S
I
M
_
P
C
/
0
2
A
P
X
1
L
K
C
S
_
P
C
/
1
2
A
P
X
4
K
6
J
N
S
S
/
2
2
A
P
X
XOSC32OUT
C6
M15
XPA0/CS1N
XPA10/IRQ4
N2
5
K
X
R
A
D
R
I
/
1
1
A
P
X
X
T
A
D
R
I
/
2
1
A
P
X
1
N
6
G
1
X
T
_
3
1
A
P
X
1
X
R
_
4
1
A
P
X
3
G
4
H
0
X
T
/
5
1
A
P
X
4
T
3
T
U
O
S
/
8
B
K
_
P
C
X
4
T
U
O
S
/
9
B
K
_
P
C
X
3
N
K
C
T
_
P
C
X
7
D
3
1
D
O
D
T
_
P
C
X
8
G
S
M
T
_
P
C
X
N
T
S
R
T
_
P
C
X
9
F
XCP_WEN
C13
B
T
S
R
F
X
4
F
4
L
0
N
I
S
/
0
B
K
_
P
C
X
1
N
I
S
/
1
B
K
_
P
C
X
5
L
4
M
2
N
I
S
/
2
B
K
_
P
C
X
1
T
3
N
I
S
/
3
B
K
_
P
C
X
4
N
I
S
/
4
B
K
_
P
C
X
2
R
3
T
0
T
U
O
S
/
5
B
K
_
P
C
X
1
T
U
O
S
/
6
B
K
_
P
C
X
3
U
3
P
2
T
U
O
S
/
7
B
K
_
P
C
X
F7
XCP_D3
XCP_D4
C5
D6
XCP_D5
E7
XCP_D6
XCP_D7
D5
XCP_D8
C4
B4
XCP_D9
I
D
T
_
P
C
X
7
C
XCP_D1
B5
B3
XCP_D10
XCP_D11
C1
C2
XCP_D12
XCP_D13
D2
XCP_D14
D3
E3
XCP_D15
XCP_D2
F8
C14
XCP_A5
XCP_A6
A16
A15
XCP_A7
B17
XCP_A8
XCP_A9
C17
XCP_CSRAMEN
A13
A12
XCP_CSROMEN
A6
XCP_D0
K13
XCP_A17
XCP_A18
K14
L14
XCP_A19
E14
XCP_A2
L15
XCP_A20
XCP_A21
L16
XCP_A3
D15
XCP_A4
B15
XCP_A1
F11
XCP_A10
D16
F14
XCP_A11
G14
XCP_A12
XCP_A13
G13
G17
XCP_A14
XCP_A15
J12
XCP_A16
K12
X2RTC
D10
XAG0
B11
A11
XAG1
E11
XAG2
XAG3
D11
B7
XBSWN
M12
XCPTSTSTOP_CKO
XCP_A0_BEON
B13
S
S
V
0
1
G
7
H
S
S
V
1
1
H
S
S
V
7
J
S
S
V
S
S
V
6
K
A
S
S
V
0
1
E
L
L
P
D
_
S
S
V
5
1
E
A7
X1RTC
S
S
V
0
1
L
7
M
S
S
V
S
S
V
8
L
1
1
J
S
S
V
9
L
S
S
V
S
S
V
3
A
S
S
V
6
F
9
G
S
S
V
E
D
D
V
6
1
N
6
1
E
E
D
D
V
E
D
D
V
7
1
E
6
1
G
L
L
P
D
_
D
D
V
8
D
C
T
R
V
2
A
S
S
V
7
K
S
S
V
6
L
S
S
V
1
1
C
A
D
D
V
E
D
D
V
1
B
4
1
B
E
D
D
V
1
M
E
D
D
V
E
D
D
V
2
U
8
P
E
D
D
V
E
D
D
V
5
1
U
6
1
U
E
D
D
V
D
D
V
1
G
1
R
D
D
V
D
D
V
4
R
3
1
T
D
D
V
D
D
V
6
1
R
7
1
R
D
D
V
D
D
V
5
A
6
1
C
D
D
V
U5
RWN
H13
TCK
H12
TDI
F12
TDO
TMS
G12
F15
TRST
2
E
D
D
V
D
D
V
7
1
L
N7
DB#9
INT#0
N4
IO7
R12
IOBIT#1
K11
L12
IOBIT#2
1
C
N
C
N
2
2
1
C
B
T
S
R
P10
DB#15
DB#2
R6
P6
DB#3
DB#4
U7
DB#5
T7
R7
DB#6
DB#7
M6
DB#8
P7
CKO
G15
P5
DB#0
DB#1
U6
DB#10
N8
DB#11
M8
U11
DB#12
DB#13
T11
DB#14
R11
AB#2
R13
AB#3
N11
P11
AB#4
AB#5
P12
R14
AB#6
T14
AB#7
AB#8
T17
I
K
C
7
1
F
U200
AB#0
U13
M10
AB#1
C215
C221C220
VCC_1.8A
VCC_1.8A
C217
R205
VCC_1.8A
R209
R210
C206
C222
C207
R200
VCCB_2.9V
R203
R219
R208
OSC200
23
41
C205
R206
R212
VBAT
R213
100K
VRTC_2.9V
C219
DSP_TCK
R204
VCCD_2.9V
VCCD_2.9V
C208
TH200
DSP_TDI
VCCD_2.9V
DSP_TMS
0
2
2
R
R214
R202
DSP_TDO
C216
RING_EN
LED_EN
LED_EN
VIB_EN
CP_TCK
TR_RST
BAT_CF
DSP_AB(0)
CHG_ON
DLC_DETECT
A(0:20)
CP_TDI
CP_TMS
DSP_DB(14)
DSP_DB(13)
DSP_DB(12)
DSP_DB(11)
DSP_DB(10)
DSP_DB(1)
DSP_DB(0)
CLK13M_TR
DSP_AB(8)
DSP_AB(7)
DSP_AB(6)
DSP_AB(5)
DSP_AB(4)
DSP_AB(3)
DSP_AB(2)
DSP_AB(1)
DSP_RWN
TR_RST
DSP_IO
DSP_INT
DSP_DB(9)
DSP_DB(8)
DSP_DB(7)
DSP_DB(6)
DSP_DB(5)
DSP_DB(4)
DSP_DB(3)
DSP_DB(2)
DSP_DB(15)
A(20)
A(2)
A(19)
A(18)
A(17)
A(16)
A(15)
A(14)
A(13)
A(12)
A(11)
A(10)
A(1)
A(0)
TR_RST
ICHRG
D(14)
D(13)
D(12)
D(11)
D(10)
D(1)
D(0)
CP_CSROMEN
CP_CSRAMEN
A(9)
A(8)
A(7)
A(6)
A(5)
A(4)
A(3)
A(21)
KEY_ROW(0)
KEY_COL(4)
KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
KEY_COL(0)
D(9)
D(8)
D(7)
D(6)
D(5)
D(4)
D(3)
D(2)
D(15)
UP_SDO
LCD_CS
UP_SDI
JACK_IN
DEBUG_RXD
DEBUG_TXD
SDS_RXD
SDS_TXD
CLK32K
FLASH_RESET
CP_WEN
TR_RST
CP_TDO
KEY_ROW(4)
KEY_ROW(3)
KEY_ROW(2)
KEY_ROW(1)
DEBUG_DCD
CP_OEN
A(22)
DEBUG_DSR
EAR_SWITCH
DEBUG_RTS
DEBUG_DTR
CHG_DET
DEBUG_CTS
PWR_KEEP
SIMRST
DEBUG_RI
UP_CS
UP_SCLK
DSP_DB(15:0)
D(0:15)
KEY_ROW(0:4)
KEY_COL(0:4)
DSP_AB(8:0)
VREF
SIMDATA
SIMCLK
RTCALARM
INTRQ
UPPER_BYTE