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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
C 325
C303
VRTC
R309
PW R_O N
JI G _O N
RTCALARM
PW R_KEEP
KEY_CO L( 2)
3
2
KEY_RO W ( 0)
VCCD
DLC_DETECT
SDS_TXD
SDS_RXD
DEBUG _TXD
DEBUG _RXD
DEBUG _DTR
DEBUG _CTS
DEBUG _RTS
DEBUG _DCD
JI G _O N
DEBUG _DSR
DEBUG _RI
TA_VEXT
TA_VEXT
C317
C 326
R319
C 329
CHG _DET
3
Q 302
1
Q 303
2
1
2
CHG _O N
3
KEY_CO L( 0: 4)
KEY_CO L( 0)
R325
KEY_CO L( 1)
0
R326
KEY_CO L( 2)
R327
0
0
R329
KEY_CO L( 3)
KEY_CO L( 4)
R333
0
0
R334
KEY_RO W ( 0: 4)
KEY_RO W ( 0)
R335
KEY_RO W ( 1)
R336
KEY_RO W ( 2)
R337
KEY_RO W ( 3)
R350
KEY_RO W ( 4)
CN300
1 1
4
4
2
5
2
5
3 3
6
6
G
G G
G
78
91 0
C300
C301
C302
C304
49
50
51
48
29
30
28
6
54
40
SI M RST
UP_RST
VLDO _7
53 UP_CLK
SI M CLK
52
VDD67 41
SI M DATA
UP_I O
42
44
ADC_AUX1
VLDO _6
VBAT
45 ADC_AUX2
56 ADC_TRI G
32
VL5S_A
31
3
VACC
VL5S_B
2
VBAT
33
VLDO _5
1
TA_VEXT
VEXT
34
43
BTEM P
VDD5
46
36
PW R_SW 1N
VL4S_A
47
35
PW R_SW 2
VL4S_B
13
RTC_ALM N
21 PW R_KEEP
VLDO _4 37
20
PSW 1_BUF
14
U300
VDD34 38
I NTRQ
C305
R316
15
UP_SDI
SDI
16
39
SDO
VLDO _3
17
UP_SCLK
SCLK
18
UP_CS
CSN
VRTC 12
22
EN_VRF
EN_3
23
EN_VPAC
EN_4[ 0]
24
11
EN_4[ 1]
VLDO _2
25
1
XO ENA
EN_5
26
EN_5A
27
19
Q 300
EN_5B
RESET N
55
RI NG _PW M
9
VLDO _1
57
G ND
58
10
G ND
VDD12
59
G ND
60
G NDD
5
4
7
8
VCCD
VCCD
VCCD
R300
R301
R302
R303
ZD 301
ZD 302
6
1
1
2
2
5
5
4
3
3
I / F C O N N EC TO R
Q 301
6
5
2
4
1
VBAT
PO W ER
U301
3
I SENSE
1
6
DRI VE
2 G ND
5
VSENSE
3
4
VCC
PRO G
C316
KEY_BACKLI G HT_EN
6
R322
I CHRG
R323
5
TA_VEXT
R324
4
12
SEND
CLEAR
I
KEYPAD
DD- DO M - 4PI E- 2
KEYPAD
12
12
12
34
5
1
2
3
UP
KEYPAD
KEYPAD
KEYPAD
KEYPAD
12
12
12
12
4
5
6
DO W N
KEYPAD
KEYPAD
KEYPAD
KEYPAD
12
12
12
12
12
7
8
9
LEFT
M ENU
KEYPAD
KEYPAD
KEYPAD
KEYPAD
KEYPAD
12
12
1
2
1
2
12
34
5
*
0
SHARP
RI G HT
STO
KEYPAD
DD- DO M - 4PI E- 2
KEYPAD
KEYPAD
KEYPAD
12
12
12
12
12
VO LU M E
PW R
KEYPAD
12
PW R_O N
K EY
SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce
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VBAT
VCC_1. 8A
VCCD
VRF
VPAC
VO SC
VCCA
VCCB
VRTC
VREF
C306
C310
C311
C312
C313
C307
C308
C309
C314
C315
VBAT
VCCB
DAI DI
DAI DO
R 354
DAI RN
DAI CK
R 304
1K
DLC_DETECT
R 305
1K
SDS_TXD
R 306
1K
SDS_RXD
R 307
1K
DEBUG _TXD
R308
1K
DEBUG _RXD
VCCD
R 310
1K
DEBUG _DTR
G ND
R 311
1K
DEBUG _CTS
R 312
1K
DEBUG _RTS
G ND
R 313
1K
DEBUG _DC D
R 314
1K
JI G _O N
VTEST
R 315
1K
DEBUG _DSR
R 317
1K
DEBUG _RI
VEXT
VEXT
G ND
R 355
N C
BP_CF
BP_CF
BP_VF
BP_VF
VBATT
ZD 303
6
6
6
G ND
1
1
G ND
2
2
5
5
4
4
4
3
3
C 328
ZD 322
ZD 319
VBAT
U 302
1 VI NV
O UT1 10
V_M O TO R
V_M O TO R
EN1
VO UT2
2
9
VI B_EN
V_AUX
3 EN2
N/ C 8
CBYP
N/ C
4
7
5 N/ C
G ND 6
11 12 1314 15 16
C 321
C 322
C 323
C 324
V_AU X
SW 1
LED301
LED302
LED306
LED303
R 342
R 343
300
300
SW 2
R 338
R 339
R 340
R 341
2-12
R318
RST
M 1
CN301
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10 10
11
11
12 12
13
13
14 14
15
15
16 16
17
17
18 18
19
19
20 20
21
21
22 22
23
NC
24
NC
C 327
VBA T
VCCD
R 320
30
CN302
C 318
1 I N +
1U F
2
I N -
3 G ND1
4
C 320
C 330
G ND2
I RDA_EN 1
C 319
100N F
ZD 306
I R D A
DSP_TD O
V_AU X
DSP_TD I
LED307
LED308
LED309
LED310
LED311
LED312
DSP_TM S
DSP_TCK
CP_TDO
RST
CP_TDI
CP_TM S
CP_TCK
R 344
R 345
R 346
R 347
R 348
R 349
LED300
1
LEDA
2
LEDC
3
I RDA_TX
TXD
4
I RDA_R X
RXD
R 356
0
5
I RDA_EN
SD
6
V C C
R 357
N C
7
G ND
DSP_TD O
DSP_TD I
DSP_TM S
DSP_TCK
CP_TDO
RST
CP_TDI
CP_TM S
CP_TCK
JTAG CO N
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