Samsung SGH-X120 User manual

SGH-X120
GSM TELEPHONE
1. Specification
2. Flow Chart of Troubleshooting
3. ExplodedViewsandPartsLis
4. Electrical Parts List
5. Block Diagram
6. PCB Diagrams
GSM TELEPHONE CONTENTS

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1. SGH-X120 Specification
1-1
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1. GSM General Specification
GSM900
Phase 1 EGSM 900 Phase 2 DCS1800 Phase 1
Freq. Band[MHz]
Uplink/Downlink 890~915 935~960 880~915 925~960 1710~1785 1805~1880
ARFCN range 1~124 0~124 &
975~1023 512~885
Tx/Rx spacing 45MHz 45MHz 95MHz
Mod. Bit rate/
Bit Period 270.833kbps 3.692us 270.833kbps 3.692us 270.833kbps 3.692us
Time Slot
Period/Frame Period 576.9us 4.615ms 576.9us 4.615ms 576.9us 4.615ms
Modulation 0.3GMSK 0.3GMSK 0.3GMSK
MS Power 33dBm~13dBm 33dBm~5dBm 30dBm~0dBm
Power Class 5pcl ~ 19pcl 5pcl ~ 19pcl 0pcl ~ 15pcl
Sensitivity -102dBm -102dBm -100dBm
TDMA Mux 8 8 8
Cell Radius 35Km 35Km 2Km

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SGH-X120 Specification
1-2
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2. GSM TX power class
TX Power
control level DCS1800
030±3dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
716±3dBm
814±3dBm
912±4dBm
10 10±4dBm
11 8±4dBm
12 6±4dBm
13 4±4dBm
14 2±5dBm
15 0±5dBm
TX Power
control level GSM900
533±2dBm
631±2dBm
729±2dBm
827±2dBm
925±2dBm
10 23±2dBm
11 21±2dBm
12 19±2dBm
13 17±2dBm
14 15±2dBm
15 13±2dBm
16 11±3dBm
17 9±3dBm
18 7±3dBm
19 5±3dBm

2. SGH-X120 Flow Chart of Troubleshooting
2-1
1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥100mA ?
Check the V bat. voltage
Down load again
Check the pin of U300
Pin #9=1.8V?
Check the Initial operation
END
pin #39 and #33 = 2.8V
Charge the Battery
Checktheclockgeneration
circuit (OSC100, U105 pin#4)
Checktheclocksignal
at pin #3 of OSC100
Freq.=13MHz,Vrms 300mV
Check U300 and C312
Check U300 and C313
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Voltage ≥3.3V ?
pin #11 ≥2.8V ?

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-2
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2. System Initial
The pin #9 of U300 = 1.8V
and pin #11 of U300=2.8V?
Initial Failure
Is the pin #19 of U300
"Low-->High"?
There is 32.768KHz wave
form at the C225, C226 ?
Is the pin #25 of U300
is High ?
The voltage is "High"
at the C306,C308,C309 ?
LCD Display OK ?
Sound operation OK ?
END
Check the U201
Check the U200
Check the U300
Check the LCD part
Check the Audio part
YES
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
NO
NO
YES
Check the U300
(If it has some problem,
it has to be replaced.)
Check the U300
(If it has some problem,
ithastobereplaced.)

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-3
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3. SIM Part
Is there any signal
pin #52,53,54 of U300 ? Check the U201
"Insert SIM" is displayed on the LCD
END
Check the SIM Card
YES
NO
NO
YES
Is there any signal
pin #1,2,3,6 of CN300 ? Check the U300

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-4
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4. Charging Part
The pin #17,18 of CN301
(VEXT) is 5V ? Replace TA or check CN301
Abnormal charging operation
END
Check the U302
YES
NO
NO
The pin#6 OF U302 LOW?
YES
The pin#2 of U302 is Low?
YES
Check the U302
NO
The pin#5 of U301 is
3.2~4.2V? Check the U301
NO
The ICHRG =1V(during charging)
& 180mV(full charging)?
YES
YES
Solder again or change
R322
NO

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-5
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5. Microphone Part
Micro-phone does not work
Is the assembled status of
Microphone O.K?
YES
Reassemble the microphone
NO
Check the DC bias voltage on
Mic path.
The voltage of C476 is
2.2V±10%? NO Solder the microphone again
or Replace
C434,C476,R416,R415,R440
Is microphone OK? NO Check U300
END
YES
YES

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-6
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6. Speaker Part
Is the terminal of speaker
is O.K? NO Replace the speaker
There is no sound from speaker
YES
The type of sound from
the speaker is Melody?
YES NO
Check
U201,
U401
NO NO
Pin #4 of U401
is Low? Pin #4 of U401
is High?
Check U402
NO NO
YES YES
YES
YES
END
Are there any signal
at the pin #5,7 of U401? Are there any signal
at the pin #3,9 of U401?
Check U200

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-7
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7. EGSM Receiver
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
U100 Check
Pin #6 ≥-65dBm ?
U100 Check
Pin #11 ≥-65dBm ?
U103 Check
Pin#20,21 ≥-65dBm ?
Check soldered status of
C102
CON101
Resolder or Change
U100 Resolder or Change
U103 Check
Pin#9,32=Clean 2.8V?
U103 Check
Pin#28,1,2,3=100mV?
U300, C306, C308
Check or resolder
Check U200
NO
NO
YES
YES
YES
YES
NO
YES
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC100 Check
Pin #8 : 13MHz ?
Vpp : 950mV?
OSC100 Check
Pin #4 = 2.8V ?
U103
Change or resolder
NO
NO NO
C129, R114
resolder OSC100 Change or resolder
YES YES YES
NO
Check soldered status of
C117, 118, L103, U104
U104 Check
Pin #1 ≥-65dBm ?
Check soldered status of
C114 &
U100 Resolder or Change
NO
YES
NO

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-8
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8. EGSM Transmitter
Continuous TX ON condition
TX Power Code : 500 code Applied
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
C103
=3.7V?
Change U101
NO
YES
U100 Pin#6
About 2~3 dBm? U100
Pin#10 = High? U200, Q202
Check & Change
NO
U102, CON101
Check & Change
YES
U100
Check & Change
YES
Check the
Battery Block
Level of
U101 Pin #6 is
1.2V?
Check
& Change R107
OK ?
U200
Check & Change
YES
YES
NO
NO NO
NO
U101 pin#7
About -5 dBm?
U101 pin#3
High ? Check U200
YES
NO
YES
U103 Check
Pin#9,32 ≥2.8V ?
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC100 Check
Pin #8 : 13MHz ?
Vpp : 950mV? OSC100 Check
Pin #4 = 2.8V ?
NO
YES
NO
NO NO
R114, C129
resolder OSC100 Change or resolder
YES YES YES
NO
U300, C306, C308
Check or resolder
U401 Pin
#4,5,6,7 = 1.7V?
YES
Change U101
Check U200
NO
YES
Level of
U100 Pin#7 is
4~5dBm ?

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-9
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9. DCS Receiver
Continuous RX ON
RF Input : 660 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
U100 Check
Pin #6 ≥-65dBm ?
U100 Check
Pin #3 ≥-65dBm ?
U103 Check
Pin#18,19 ≥-65dBm ?
Check soldered status of
C102
CON101
Resolder or Change
U100 Resolder or Change
U103 Check
Pin#9,32=Clean 2.8V?
U103 Check
Pin#28,1,2,3=100mV?
U300, C306, C308
Check or resolder
Check U200
NO
NO
YES
YES
YES
YES
NO
YES
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC100 Check
Pin #8 : 13MHz ?
Vpp : 950mV? OSC100 Check
Pin #4 = 2.8V ?
U103
Change or resolder
NO
NO NO
R129, 114
resolder OSC100 Change or resolder
YES YES YES
NO
Check soldered status of
C107, 115, ,L102, U102
U102 Check
Pin #1 ≥-65dBm ? Check soldered status of
C114, 116
NO
YES
NO

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-10
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10. DCS Transmitter
Continuous TX ON condition
TX Power Code : 350 code Applied
CH : 660
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
C104
=3.7V?
Change U101
NO
YES
U100 Pin#6
About 2~3 dBm? U100
Pin#4 = High? U200,Q203
Check & Change
NO
C102, CON101
Check & Change Level of
U100 Pin#5 is
4~5dBm ?
YES
U100, L100, C106, C114
Check & Change
YES
Check the
Battery Block
Level of
U101 Pin #6 is
1.2V?
Check
& Change R107
OK ?
U200
Check & Change
YES
YES
NO
NO NO
NO
U101 pin#1
About -5 dBm?
U101 pin#3
High ? Check U200
YES
NO
YES
U103 Check
Pin#9,32 ≥2.8V ?
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC100 Check
Pin #8 : 13MHz ?
Vpp : 950mV? OSC100 Check
Pin #4 = 2.8V ?
NO
YES
NO
NO NO
R129, 114
resolder OSC100
Change or resolder
YES YES YES
NO
U300, C306, 308
Check or resolder
U103 Pin
#4,5,6,7 = 1.7V?
YES
Change U101
Check U200
NO
YES

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-11
This Document can not be used without Samsung's authorization
JACK_IN
EAR_SPK_N
EAR_MIC_N
AUDIO
EAR_SPK_P
EAR_MIC_P
C 418
VCCA
R418
R402
13K ,1%
R424
C 452
C 425
C463
C 430
D 400
5
6
C 451
ZD 405
1
2
34
R 433
R 416
C469
C467
C403
R403
C 404
62K ,1%
R 429
1
R434
Q 401
23
ZD407
VCCD
C 416
C 409
C 453
SPK400
ZD409
C 455
C 439
VBAT
C 420
C460
C 408
ZD402
C470
C 442
C471
R 407
VCCD
R 432
VCCA
C 476
R425
C473
C472
R 422
C 421
C462
GND
1
SWVIN
5
_SHDN
4
R 421
U 400
FB 3
2
33U F
L403
C 441
C 445
L400
VCCD
C 401
R 426
C 447
R401
C464
VCCA
C 443
MIC_P
C 440
C459
R 431
VBAT
C468
C 429
C 444
R 428
C402
R404
NC1 5
7NC2
NO1 2
NO2
10 1
V+
ZD40
1
U 401
3
COM 1
9COM 2
6GND
IN1 4
IN2
8
C 432
C458
8VDD
VICON
4
WRB
11
PREB
PREG
32
33 PRER
12 RDB
RSTB
10
5VBATT
2VCC1
VCC4
35
D7
D8
23
24 D9
GND4
34
GND2
3
GND3
9
36 NC1
1NC2
31
D13
D14
29
30 D15
D2
17
18 D3
D4
19
D5
20
D6
21
22
C1+
C1-
7
CSB
13
D0
15
16 D1
D10
25
D11
26
D12
27
28
CN400
A0
14
6
R427
C 405
R435
C466
C 417
VBAT
C 406
C 448
R 419
100K
/
RST
4
28 /WR
VCCD
ZD406
15
SPVDD
SPVSS 16
7
VDD
9
VREF
VSS
8
/CS
29
3
/
I
RQ
/RD
31 11
HPOUT-R
IOVDD
32
LED
2
19
MTR
5
NC
PLLC
6
17
SPOUT1
SPOUT2
18
EQ1 12
13
EQ2
EQ3 14
33 G
G
34 35
G
G36
HPOUT-L/MONO 10
D0
27
26 D1
25
D2
D3
24 23
D4
D5
22 21
D6
D7
20
U 402
$V
30 A0
1
CLKI
R 408
MIC_M
VCCD
R437
R 405
C 424
C 456
R 415
C 435
1N F
L401
3
4
C 431
F400
1
2
C 457
R 414
C 449
ZD408
1
2
3
4
5
6
C 434
C N 401
R 440
C 415
C 477
C 450
ZD404
R400
ZD40
0
C410
R 417
1.2K
C407
C461
C 419
C 437
R 423
C 433
ZD403
8PF
C 438
NC
1
C 436
Q 400
23
L404
R 420
150K ,1%R 406
C465
R 411
VCCA
R 430
L402
C 446
C 454
YMU_IRQ
MEM_RST
LCD_SEL
CP_W EN
C LK 13M _YM U
D(
2)
D(
3)
D(
4)
D(
5)
D(
6)
D(
7)
YMU_LED
VI
B_EN
MSPK-
MSPK+
D(13)
D(14)
D(15)
A(3)
A(0)
M SPK-
M SPK+
V_BO OST
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
D(10)
D(11)
D(12)
D(
0)
D(
1)
D(
2)
D(
3)
D(
6)
D(
7)
D(
5)
D(
4)
D(
10)
D(
11)
D(
9)
D(
8)
D(
14)
D(
15)
D(
13)
D(
12)
MEM_RST
D(0)
LCD_BACKLIGHT_EN
LCD_BACKLIGHT_CONTRO L
V_BOOST
SPK1N
SPK1P
AOUTAN
AOUTAP
SPK1N
SPK1P
AUDIO_OUT_SEL
EAR_SW ITCH
AOUTBP
AOUTBN
D(1)
D(0)
CP_W EN
CP_OEN
YMU_EN
AUXOUT
AUXIN
MICOUT
MICIN
JACK_IN

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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-12
This Document can not be used without Samsung's authorization
DEBUG_RTS
I/F CONNECTOR
BP_CF
GND
VCCD
VOLUM E
GND
DEBUG_TXD
VEXT
SDS_RXD
DEBUG_DSR
GND
DEBUG_CTS
SDS_TXD
VEXT
GND
VTEST
JTA G CON
DLC_DETECT
DEBUG_RI
DEBUG_DCD
JIG_ON
POW ER
KEY
DEBUG_RXD
IRDA
GND
BP_VF
VBATT
12
DEBUG_DTR
C315
KEYPAD
PW R
VCCD
GND2
1IN+
IN-
2
0
R321
KEYPAD
12
CN 302
3GND1
4
R 312 1K
6
R 311 1K
LED307
R339
C320
LED312
R348
R316
R301
12
R349
CP_TM S
8
KEYPAD
ZD303
1
2
34
5
6
ZD316
R300
1KR304
4
PRO GVC C
3
VSENSE 5
U301
6
DRIVE
2GND
ISEN SE
1
C 330
1U F
C329
1K
C 318
VOSC
R313
R303
VBAT
R327
0
3
1
2
DSP_TDI
C306
ZD306
R325
Q 302 1
3
2
0
12
12
VCCD
SEND
KEYPAD
SW 2
34 5
KEYPAD
3
12
KEYPAD
*
12
DSP_TM S
R344
C305
ZD313
ZD318
KEYPAD
SHARP
12
R323
C303
R309
2
R347
R 315 1K
KEYPAD
LEFT
1
ZD314
1KR306
VBA T
RST
C327
C328
R 305 1K
C316
LED302 LED309LED301 LED310
CP_TDO
ZD312
12
ZD315
V_AUX
KEYPAD
MENU
12
STO
KEYPAD
R 307 1K
12
R337
KEYPAD
UP
R341
DSP_TCK
KEYPAD
7
12
ZD320
C321
R334
C307
1KR314
SW 1
34 5
12
V_MO TO R
I
KEYPAD
12
R354
1K
R338
R 310
LED305
R342
VC C _1.8A
VBAT
300
LED304
C323 C324
CP_TDI
ZD308
C301
C308
G
78
GG
91 0
G
R 346
CN 300
11
2
2
33
4
4
55
6
6
0
DD-DO M -4P IE-2
12
VBAT
VCCD
C322
R302
C317
VPAC
C300
C 325
VCCD
0
R329
VCCD
VRTC
R350
0
R357 NC
1
2
34
5
6
R 356
ZD 301
4RXD
SD
5
TXD
3
6VCC
C309
LED300
7GND
LEDA
1
2LEDC
ZD311
1KR317
NC
VBAT
C312
R355
KEYPAD
5
12
VBAT
ZD321
LED303
R 340
30
R 320
VRF
LED311
R335
R336
VLDO _3
VLDO _4 37
VLDO _5 33
42
VLDO _6
40
VLDO _7
VREF
30
VRTC 12
VSI
M
48
VEXT
VI
B_DRV
4
36
VL4S_A
VL4S_B 35
32
VL5S_A
VL5S_B 31
VLDO _1 9
VLDO _2 11
39
UP_RST
54
VACC
3
VBAT
2
10
VDD12
VDD34 38
VDD5 34
VDD67 41
1
RTC_ALM N
SCLK
17
SDI
15
SDO
16
SI
M_CLK
50 51
SI
M_I
O
49
SI
M_RST
53 UP_CLK
UP_IO
52
PSW1_BUF
20
21 PW R_KEEP
PW R_SW 1N
46
47 PW R_SW 2
RESET N 19
5
RI
NG_DRV
RING_PW M
55
13
GND
65
66GND
60 GNDD
GNDD1
628
GNDQ
14 INTRQ
7
LED1_DRV
LED2_DRV
8
GND
67
68GND
58 GND
GND
59
61GND
GND
62
63GND
GND
64
CREF
18 CSN
22
EN_3
EN _4[0]
23
24
EN _4[1]
EN_5
25
26
EN _5A
EN _5B
27
GND
57
U300
ADC_AUX1
44
45 ADC_AUX2
56 ADC_TRIG
BTEMP
43
29
ZD307
KEYPAD
RIGHT
12
4
KEYPAD
12
R 345
KEYPAD
1
12
2
KEYPAD
12
C 326
VCCB
M1
NEG
2
POS
1
R318
C314
ZD309
ZD317
R319
V_AUX
ZD322
Q 300
1
3
2
C302
0
R326
3
1
2
5
6
4
Q 301
C313
R322
C310
CP_TCK
VCCA
7
7
88
9
9
NC
23
NC
24
DSP_TDO
22
20 20
21 21
22 22
3
3
44
5
5
66
12 12
13
13
14 14
15
15
16 16
17
17
18 18
19
19
1
4
CN 301
1
1
10 10
11
11
Q 303
2
5
6
3
R343
R333
300
5N/C
N/C8
7
N/C
1VINV OUT1 10
9
VOU T2
0
3EN2
GND 6
11
GND
GND
12 13
GND
GND
14 15
GND
GND
16
U 302
CBYP
4
EN1
2
C304
ZD302
1
2
34
5
6
ZD319
1
2
34
5
6
VRTC
ZD310
VCCD
LED308LED306
C311
100N F
VCCB
12
C319
1K
DOW N
KEYPAD
2
CLEAR
DD-DO M -4P IE-2
12
R308
R324
KEYPAD
9
1
TA_VEXT
DAIDI
BP_VF
TA_VEXT
DAICK
DAIRN
DAIDO
DEBUG_RXD
DEBUG_TXD
IRDA_EN1
DEBUG_RTS
JIG_ON
BP_CF
DEBUG_DCD
DEBUG_DSR
DEBUG_RI
SDS_RXD
SDS_TXD
KEY_BACKLIG HT_EN
V_AUX
V_MO TO R
IRDA_EN
IRDA_RX
IRDA_TX
DEBUG_CTS
DEBUG_DTR
DLC_DETECT
VIB_EN
CP_TDO
DSP_TCK
DSP_TDO
RST
CP_TDI
DSP_TDI
CP_TM S
DSP_TM S
CP_TCK
CHG_ON
KEY_COL(0:4)
KEY_CO L(4)
KEY_CO L(2)
KEY_CO L(1)
KEY_CO L(0)
KEY_RO W (0:4)
KEY_ROW (4)
KEY_ROW (3)
KEY_ROW (2)
KEY_ROW (1)
KEY_ROW (0)
PW R _ON
KEY_CO L(3)
UP_SCLK
UP_CS
ICHRG
TA_VEXT
VREF
SIM DATA
SI
MRST
SIMCLK
CHG_DET
PW R _ON
JIG_ON
RTCALARM
EN_VRF
EN_VPAC
XOEN A
UP_SDI
KEY_ROW (0)
KEY_COL(2)
TA_VEXT
PW R_KEEP
RST

SAM SUNG Proprietary-C ontents maychange withoutnotice
SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-13
This Document can not be used without Samsung's authorization
X-TA L(13M H z)
TRA NSM ITTER & RECEIVER
C 114
C 111
L105
4
VBAT T
10
VCC
VCC2
81 2
VCC2
6
VRAM P
VRE G
5
U 101
2
BAND
DCSIN
1
13
GND
G S M 850/900IN
7
G SM 850/900O U T
9
11
PCSO UT
3 TXEN
10K
R 102
R 113
10N F
C 128
3
OUT
OUT 4
VBAT
C 100
U 102
2
G
5
G
IN
1
R 106
C107
3PF
R 100
C 102
C 118
C 120
C 131
C 104
10N F
C 129
R 110
VRF
VRF
10K
C 110
NC
C 116
2
GG
5
IN
1
3
OUT
OUT 4
C 127
100P F
U 104
C 122
R 101
R 105
11
2
2
C 119
NC
C N 100
9
GG
1213
GG
14
11
VC1
2
VC2
ANT
8
DCS_RX
1
DCS_TX
3
10 EGSM _RX
5EGSM _TX
G
46
G
7
G
R 107
U 100
C 101
100K
GND
2
OUT
3
4
VCC
1
VT
L104
VOSC
O S C 100 C 124
1N F
C 125
10
1N F
VOSC
R 109
C 130 10N F
10P F
C 123
L100
C 106
R 103
L102
C 115
L103
R 104
R 108
C 109C 108
C 117
CON101
3
G1
4
G2
IN
1OUT 2
1.5K
R 111
C 103
R 112
560
4
C 121
U 105
2A
GND
3
1NC 5
VCC
Y
C 126
100P F
VDD
XEN
26
XI
N
8
XOUT
27
10
_PDN
_SEN
12
VPAC
13
SDI
14
SDO
11
TXIN5
TXIP4
TXQN 7
6
TXQP
9
VDD
32
RFIPN
17
RFIPP
16
RFOD
22
RFOG
23
RXIN3
2
RXIP
1
RXQN
28
RXQP
SCLK
GND
33
GND
34
35
GND
GND 36
RFIDN
19
RFIDP
18
RFIGN
21
20 RFIGP
U 103
DI
AG1
24
DI
AG2
25
GND
15
GND
29 30
GND
31
GND
C 113 1N F
R 114
100
C 112
C 105
DCS_TX_EN
GSM_TX_EN
C LK 13M _M C
C LK 13M _T R
AFC
C LK 13M _R F
C LK 13M _Y M U
GSM_LNA_IN_P
GSM_LNA_IN_N
DCS_LNA_IN_N
DCS_LNA_IN_P
TXQP
GSM_LNA_IN_N
GSM_LNA_IN_P
DCS_LNA_IN_N
GSM_PAM_IN
D C S _P A M _IN
SERCLK
SERDAT
SI_E N
SERLE
RXIP
RXIN
RXQP
RXQN
C LK 13M _R F
DCS_LNA_IN_P
TXIN
TXIP
TXQN
TXPOW ER
TX_BAND_SEL
GSM_PAM_IN
DCS_PAM_IN
TX_EN

SAM SUNG Proprietary-C ontents maychange withoutnotice
SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2-14
This Document can not be used without Samsung's authorization
PA28/
I
OM0
CP_KB[
6]
/
TR_PROT0
PA19/
CP_MO
FLASH_RESET
PA33/
T_REQA
C S P1093
PA25/
OM0
PA14/
RX1
PA30/
I
M0
BOARD_HOLE
PA18/
T_ACK
CP_KB[
0]
/
TR_CS_I
RAM
CKO/IACK/ERAMHI
PA31/
I
M1
IOBIT[1]/VEC[4]/P LLTO A
CP_KB[
3]
/
TR_CS_I
PCP
PA22/
SM1_DAT
A
PA29/
I
OM1
PA34/
T_REQ
B
CP_KB[
9]
/
TR_GNT_DMA
SI
M_DATA/
SM0_DATA
IOBIT[2]/VEC[3]/ER O M H I
PN17/
DRQ
CP_KB[
1]
/
TR_CS_I
ROM
CP_KB[
4]
/
TR_SI
ZE
0
CP_KB[
2]
/
TR_CS_PERF
CP_KB[
8]
/
TR_NEXEC
PA20/
CP_MI
CP_KB[
7]
/
TR_SI
ZE
1
PA27/
SM1_CLK
PA13/
TX
1
CP_KB[
5]
/
TR_CL
K
SI
M_CLK/
SM0_CLK
TRIDENT
JTA G
PA26/
OM1
GND_1
VCCD
27
V_BATT 23
V_BUS
8
11 SPK+
SPK-
12
TCK 21
TDI 19
18
TDO
20
TM S
TRST 17
TXD
D-
10
22
F-WE
7GND 24
GND
HP/PO W ER 25
13 MIC+
MOT+
14
26
RXD
29
33
30
30
31 31
4
4
55
6
6
32
ANT
9D+
$P
11
15 15
16
16
2
2
28
28
29
CN 402
2.4
R215
C212
C204
C208
Q 200
2
5
6
3
1
4
R218
C224
100K
0
NCR209
R212
VCCD
R208
VCCD
F_W E_1
NC
C210
C218
R213
2
5
6
3
1
4
2.4
VCCD
Q 203
R214
C220
R200
VCCD
VCCD
NCR211
C219
C211
VCCD
C209
C222
6
3
1
4
NCR210
Q 202
2
5
C223
VSS
G10
H5 VSS
B11
VXVCM
N7
XOENA
XOENAQ N5
N12
XTALA N11
XTALB
H10
VSS
K8
K10 VSS
K6 VSS
VSS
E5
E7 VSS
E8 VSS
VSS
E10
G5 VSS
A1 VDD3
VDDA E13
VDDB K13
F14
VDDC
VDDD P13
D11
VREG
VSSK5
VSS
TXIN
J10
TXIP
TXP J14
TXQ N J1 3
H13
TXQP
UC B3
A2
UC
F1 VDD1
VDD2P6
SERCK
SERDA M8
SERLE1 P9
M7
SERLE2
N9 TCK
N10 TDI
N8 TDO
P10 TMS
H12
A10 RESETN
RFOVL N6
RW N
K4
M13
RXIN
RXIPL11
RXQN P14
N14
RXQP
K9
B7
D5 OCTL5
OCTL6A6
E6 OCTL7
OCTL8
C7
C8 OCTL9
RAREF1 K14
L13
RAREF2
REFC C13
NC 2
OCTL0
B4
A5 OCTL1
OCTL10A9
E9 OCTL11
OCTL2
B5
B6 OCTL3
OCTL4
GNDB K11
F10
GNDC
L10
GNDD
K2 IO
K7
MC
A13
MICINB12
MICOUT
1
NC
DB4
H3
G3 DB5
DB6
F5
G2 DB7
DB8F2
E2 DB9
DINTR
L4
E11
GNDA
DB10
D2
D4 DB11
DB12E1
E4 DB13
DB14C2
B1 DB15
DB2
J5
J1 DB3
AUXOU T B14
CINTRL5
B10
DAICK
DAIDI B9
DAIDO B8
DAIRN D10
DB0J2
H2 DB1
AB6
AB7
L2
K1 AB8
AFC G12
AOUTAN G13
AOUTAP F13
AOUTBN E14
D13
AOUTBP
AUXIN A14
P5 AB0
AB1
N4
N3 AB2
AB3
P2
P1 AB4
AB5
N1
M2
C216
10N F
U200
100NF
C217
R225
NC
10N F
C221
VCC_1.8A
VCCD
C232
1
Q 201
2
3
C214
VCCD
C213
VCC_1.8A
C202
VCCA
R228
H4
C203
VRTC
VCC_1.8A
C234
C233
VCCB
C229
VCC_1.8A
VCC_1.8A
C205
L2
L5
VSS
VSS L6
L7
VSS
VSS L8
VSS L1
G7 WAIT
F5 WE#
WP#
E4
B6
K6 VCC2
J8 VCCQ
VCCQ
K7
L3 VCCQ
D4 VPP/VPEN
VSS
B4
C4
VSS
VSS
RFU K3
RFU
F4 RST#
J1
S-CS1
S-CS2 C5
S-VC C K4
VCC1
B5
L4 VCC2
VCC2
OE#2
D6
P-CS#
K8 P-MODE
P-VCC
K5
C2 R-LB #
H1 R-OE#
F3 R-UB #
D5 R-WE#
K2
A8
DU M1
M2
DU
DU M7
M8
DU
1
NC
NC 2
OE#1
J2
H8
G5
J6
D6
D7 H7
G2
D8
D9 J3
A1
DU
DU A2
A7
DU
DU
J4
H5
D12
D13 G6
H6
D14
D15 J7
G3
D2
D3 H4
J5
D4
D5
A9
E5 ADV#
CE#1
K1
CE2
G8
CLK
C6
H2
D0
D1 H3
G4
D10
D11
E6
A21
B7
D1 A3
A4
B1
A5
C1
F2 A6
E2 A7
A8
F6
D7
A13
F7 A14
E8 A15
A16
F8
D2 A17
A18
B2
B3 A19
A2
E1
A20
256M B C3
512M B D3
A0
G1
F1 A1
A10
E7
B8 A11
C8 A12
D8
U203
C7
128M B
1G B E3
R207
O S C 200
470
C226
12PF
R216
C230
47K
R201
270
C231
R223
R202
H2
C207
VCC_1.8A
R229
C228
C200
R220
C227
100PF
VCCB
VCCD
R217
R222
NC
C235
12PF
C225
R227
GND
3
2VO VS 1
R204470
U202
VBAT
VCCD
H1
R219
VBAT
C215
R226
100K
CSROM 2EN
CSROM EN
N10
U12
XTIC_MODE D12
F10
XVREF
XPA5/WAITN
P15
T15 XPA6/BE1N
XPA7/IRQ 1
M9
T5 XPA8/IRQ 2
XPA9/IRQ 3
P2
XPWM1
R5
E8
XRTCALARM_N
E1
H14
XPA32_CS0
N
N17
M17
XPA35_A22L13
N15
XPA36_A23_CS5
N
XPA3/CS4N
N14
XPA4/OEN
P16
XPA23/
PWM2
H5XPA24/
PWM3
M3
G2
G4
G5
F1
M11 XPA2/CS3N
F3
XPA16/
RX0
E4
P13
L2
M14 XPA1/CS2N
L1
K4XPA21/
CP_SCK
J6
H6
XOSC32O UT
XPA0/CS1N
M15
N2 XPA10/IRQ 4
XPA11/
I
RDARX
K5
N1XPA12/
I
RDATX
G6
G3
XPA15/
TX0
H4
L3
T4
N3
D7XCP_TCK
XCP_TDO
D13
XCP_TMS
G8
F9XCP_TRST
N
C13 XCP_W EN
F4
C6
L4
L5
M4
T1
R2
T3
U3
P3
C5 XCP_D4
XCP_D5
D6
XCP_D6
E7
D5 XCP_D7
C4 XCP_D8
XCP_D9
B4
C7XCP_TDI
B5 XCP_D1
XCP_D10
B3
C1 XCP_D11
XCP_D12
C2
D2 XCP_D13
D3 XCP_D14
XCP_D15
E3
F8 XCP_D2
XCP_D3
F7
A16 XCP_A6
XCP_A7
A15
XCP_A8
B17
C17 XCP_A9
A13 XCP_CSRAM E N
XCP_CSROME N
A12
XCP_D0
A6
K14 XCP_A18
XCP_A19
L14
XCP_A2
E14
XCP_A20
L15
L16 XCP_A21
D15 XCP_A3
B15 XCP_A4
XCP_A5
C14
F11 XCP_A1
D16 XCP_A10
XCP_A11
F14
XCP_A12
G14
G13 XCP_A13
XCP_A14
G17
J12 XCP_A15
K12 XCP_A16
XCP_A17
K13
X2RTC
B11
XAG0
XAG1 A11
XAG2 E11
D11
XAG3
XBSW N B7
XCPTSTSTO P_CKO M12
B13 XCP_A0_BEO N
G10
VSS
VSSH7
VSSH11
J7
VSS
K6
VSS
E10
VSSA
E15
VSS_DPLL
X1RTC A7
D10
L10
VSS
VSSM7
L8
VSS
J11
VSS
VSSL9
A3
VSS
F6
VSS
VSSG9
N16
VDDE
VDDEE16
E17
VDDE
VDD_DPL
LG16
VRTCD8
VSSA2
VSSK7
VSSL6
B1
VDDE
VDDEB14
VDDEM1
U2
VDDE
VDDEP8
U15
VDDE
VDDEU16
G1
VDD
VDDR1
R4
VDD
VDDT13
R16
VDD
VDDR17
A5
VDD
VDDC16
VDDAC11
TCK H13
TDI H12
F12
TDO
G12
TM S
TRS T F15
VDDE2
L17
VDD
DB#9 N7
N4
INT#0 R12
IO7
K11
L12
NC1
2
NC
RSTBC12
RW N U5
DB #15 P10
R6
DB#2
DB#3 P6
U7
DB#4
T7
DB#5
DB#6 R7
M6
DB#7
P7
DB#8
G15
DB#0 P5
U6
DB#1
DB #10 N8
M8
DB #11
DB #12 U11
T11
DB #13
R11
DB #14
N11
AB#3
AB#4 P11
P12
AB#5
AB#6 R14
AB#7 T14
T17
AB#8
F17
CKI
U201
U13
AB#0
AB#1 M10
R13
AB#2
C201
R221
R224
43 2
1
R203270
LED 201
C206
R205
270
R206
43 2
1
270
H3
LED 200
CSRAMEN
A(23)
IRDA_EN1
BP_CF
RST
CP_TCK
CP_TM S
CP_TDI
CP_TD O
VBAT
JIG_ON
SDS_RXD
SDS_TX D
CP_WEN
DAIDO
DAIDI
DAICK
DAIRN
TXPOW ER
RED_LE D
GR EEN_LE D
BLUE_LED
XOENA
BLUE_LED
GR EEN_LE D
TX_BAND_SEL
GSM_TX_EN
DCS_TX_EN
TX_EN
EN_VRF
EN_VPAC
SI_E N
RED_LE D
RXIN
RXIP
RXQN
RXQP
TXIN
TXIP
TXQ N
TXQ P
AOUTBN
MEM_RST
DSP_RWN
DSP_IO
DSP_AB(0:8)
DSP_DB(0:15) DSP_AB(8)
AFC
AUXIN
CP_INT
DSP_INT
CL K 13M _M C
MICIN
DSP_DB(6)
DSP_DB(7)
DSP_DB(8)
DSP_DB(9)
SERCLK
AUXOU T
AOUTBP
SERDAT
SERLE
AOUTAP
AOUTAN
MICOU T
CLK32K
DSP_AB(4)
DSP_AB(5)
DSP_AB(6)
DSP_AB(
7)
DSP_DB(0)
DSP_DB(1)
DSP_DB(10)
DSP_DB(11)
DSP_DB(12)
DSP_DB(13)
DSP_DB(14)
DSP_DB(15)
DSP_DB(2)
DSP_DB(3)
DSP_DB(4)
DSP_DB(5)
A(23)
ICHRG
LCD_BACKLIGHT_EN
CHG_DET
AUDIO_OUT_SE L
YM U_LE D
EAR_SW ITC H
DSP_AB(0)
DSP_AB(1)
DSP_AB(2)
DSP_AB(3)
CP_TDI
CP_TM S
DSP_TC K
DSP_TD I
DSP_TD O
DSP_TM S
RST
UP_SCLK
UP_CS
FLASH_RESET
VREF
CP_CSROM2EN
CLK32K
RTCALARM
BP_VF
JACK_IN
DEBUG_DSR
RST
CP_TCK
A(21)
DEBUG_DTR
DEBUG_RTS
IRDA_EN
LCD_BACKLIGHT_CONTRO L
UP_SDI
CP_TDO
RST
SDS_RXD
SIM DATA
SIMCLK
CHG_ON
DEBUG_RI
DSP_IO
DSP_RW N
DSP_INT
RST
CL K 13M _TR
DLC_DETEC T
CP_WEN
CP_OEN
DEBUG_DCD
UPPER_BYTE
YM U_IRQ
IRDA_TX
SIM RST
PW R_KEEP
DEBUG_TXD
DEBUG_CTS
KEY_BACKLIGHT_E N
SDS_TX D
CP_INT
IRDA_RX
DEBUG_RXD
DSP_AB(6)
DSP_AB(5)
DSP_AB(4)
DSP_AB(3)
DSP_AB(2)
DSP_AB(1)
DSP_AB(0)
KEY_RO W (4)
DSP_AB(8)
YM U_EN
A(22)
CP_CSROME N
CP_CSRAMEN
LCD_SEL
A(3)
A(2)
A(1)
A(0)
KEY_RO W (0:4)
KEY_RO W (3)
KEY_RO W (2)
KEY_RO W (1)
KEY_RO W (0)
KEY_CO L(0:4)
KEY_CO L(4)
KEY_CO L(3)
KEY_CO L(2)
KEY_CO L(1)
KEY_CO L(0)
DSP_AB(8:0)
DSP_AB(7)
A(19)
A(18)
A(17)
A(16)
A(15)
A(14)
A(13)
A(12)
A(11)
A(10)
A(9)
A(8)
A(7)
A(6)
A(
5)
A(4)
D(13)
D(12)
D(11)
D(10)
D(9)
D(8)
D(7)
D(6)
D(5)
D(4)
D(3)
D(2)
D(1)
D(0)
A(0:20)
A(20) DSP_DB(3)
DSP_DB(4)
DSP_DB(5)
DSP_DB(6)
DSP_DB(7)
DSP_DB(8)
DSP_DB(9)
DSP_DB(10)
DSP_DB(11)
DSP_DB(12)
DSP_DB(13)
DSP_DB(14)
DSP_DB(15)
D(0:15)
D(15)
D(14)
CP_CSRAMEN
A(0)
UPPER_BYTE
DSP_DB(15:0)
DSP_DB(0)
DSP_DB(1)
DSP_DB(2)
D(4)
D(3)
D(2)
D(1)
D(0)
A(22)
A(1)
MEM_RST
RST
FLASH_RESET
CP_CSROME N
CP_CSROM2EN
MEM_RST
CP_OEN
CP_WEN
A(6)
A(5)
A(4)
A(3)
A(2)
D(0:15)
D(15 )
D(14 )
D(13 )
D(12 )
D(11 )
D(10 )
D(9)
D(8)
D(7)
D(6)
D(5)
A(1:22)
A(21)
A(20)
A(19)
A(18)
A(17)
A(16)
A(15)
A(14)
A(13)
A(12)
A(11)
A(10)
A(9)
A(8)
A(7)

SAM SUNG Proprietary-C ontents maychange withoutnotice
3. SGH-X120 Exploded View and its Parts list
3-1
This Document can not be used without Samsung's authorization
1. Cellular phone Exploded View

SAM SUNG Proprietary-C ontents maychange withoutnotice
SGH- X120 Exploded view and its Part list
3-2
This Document can not be used without Samsung's authorization
2. Cellular phone Parts list
Location
NO. Description SEC CODE Remark
QLC01 LCD GH07-00547A
QSP01 SPEAKER 3001-001551
QMO01 MOTOR GH31-00086A
QMI01 MICROPHONE ASSY GH30-00136A
QFR01 FRONT COVER GH75-04428A
QVO01 VOLUME KEY GH75-04433A
QKP01 KEYPAD GH75-04432A
QMP01 MAIN PBA GH92-01798A
QAN02 INTENNA GH42-00406A
QME01 METAL DOME GH59-01375A
QRE01 REAR COVER GH75-04430A
QRF01 RF COVER TAPE GH74-09282A
QCR04 SCREW 6001-001479
QBA26 BATTERY GH43-01310A
QSC21 EAR JACK COVER ASSY GH75-04431A

SAM SUNG Proprietary-C ontents maychange withoutnotice
SGH-X120 Exploded view and its Part list
3-3
This Document can not be used without Samsung's authorization
3. Test Jig (G H 80-00865A)
3-1. RF Test Cable
(GH39-00182A)
3-2. Test Cable
(GH39-00127A)
3-3. Serial Cable
3-4. Power Supply Cable 3-5. DATA CABLE
(GH39-00159A)
3-6. TA
(GH44-00482A)