Samsung SGH-D428 User manual

GSM TELEPHONE
SGH-D428
GSM TELEPHONE CONTENTS
1. Specification
2. Flow Chart of Troubleshooting
3. Exploded Views and Parts List
4. Electrical Parts List
5. Block Diagrams
6. PCB Diagrams

Samsung Electronics Co.,Ltd. Dec. 2004
Printed in Korea.
Code No.: GH68-06337A
BASIC.
ⓒ
This Service Manual is a property of Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.

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1. SGH-D428 Specification
This Document can not be used without Samsung's authorization
1-1
GSM900
Phase 1
EGSM 900
Phase 2
DCS1800
Phase 1 PCS1900
Freq. Band[MHz]
Uplink/Downlink
890~915
935~960
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
ARFCN range 1~124 0~124 &
975~1023 512~885 512~810
Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz
Mod. Bit rate/
Bit Period
270.833kbps
3.692us
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
576.9us
4.615ms
Modulation 0.3GMSK 0.3GMSK 0.3GMSK 0.3GMSK
MS Power 33dBm~13dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm
Power Class 5pcl ~ 15pcl 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl
Sensitivity -102dBm -102dBm -100dBm -100dBm
TDMA Mux 8 8 8 8
Cell Radius 35Km 35Km 2Km -
1. GSM General Specification

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SGH-D428 Specification
1-2
This Document can not be used without Samsung's authorization
2. GSM TX power class
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±2dBm
17 9±2dBm
18 7±2dBm
19 5±2dBm
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 PCS1900
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

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2. SGH-D428 Flow Chart of Troubleshooting
2-1
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1.Baseband
1. Power ON
Check the current
consumption more
than 100mA
'Power On' does not work
Check the VBAT
more than 3.3V
Download again
Charge the Battery
Check the pin
11 of U102 is
more than 2.8V
Check the C117
U102 pin 33,39
=2.8V Check U102 and C116
Check the clock
signal at pin4 of
OSC801
Freq=13MHz ?
Vrms≥300mV ?
Vpp is around
900mVpp ?
Check the clock generation
circuit
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
U102 pin 9
=1.8V
No
Yes

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-2
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2. Initial
3. Sim Part
Check the signal at the
pin 21 of U102 is
"High" when the phone
is boot on
Initial Failure
Check the pin 46,20 and Q103
END
No
Yes
Checkthekeymetrix
of the U601
Yes
Check the key program and
the key pcb
Check the VCCD,VCC_1.8A
of U601
Check the soldered status of U601,
OSC601
Yes
No
No
Yes
Yes
Check LCD connector CN201 in the main
PBA and the FPCB connector
Yes
Check the vccd of
U601 is around 2.8V
Check the soldered status of
U601,osc601
No
Check the pin 1 of
CN101. voltage 3V ?
Phone can't access SIM card
Check the SIM
connector's (CN101)
connection to SIM
card
Check the circuit related to
U102
Resolder or change CN101
Check the circuit around CN101
input
circuitry
END
No
Yes
Yes
Yes
Yes
No
Check the related circuit of
CN101
No
Check the circuit around U601
output
and vlotage supply circuitry
Yes
Check the related circuit of
U601 and U102
No

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-3
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4. Charging Part
Check the pin 17, 18
of CN300 is
TA_VEXT>4?
Abnormal charging part
Check the pin 2 of
U101 is "low"?
Replace TA,Check CN300-1
Check the U101
Check the Q101
END
No
Yes
Yes
Yes
Yes
No
No
Check the pin 3 of
Q101 is "low"?
Check the pin 5 of
U101 is "3.2~4.2V"? Check the U101
No
Yes
Check the ICHRG is
1V(during charging)
and around
180mV(full charging)?
No Resolder or change R111
Yes

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-4
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5. Microphone Part
6. Speaker Part
check the soldered
status of microphone.
Microphone does not work
Check the reference
voltage on mic path
C411 ≒2.5 V
Resolder microphone
Resolder or change
R413,C420,R414,C410,R411,R40
8
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok? No
Check U701
Check the FPCB from
CN201 to CN11
Speaker does not work
Check the PIN 4 of
U401='High' ?
Retry connection the FPCB from
CN201 to CN11
Check U401 and the audio
path of U701
Is speaker ok?
Check componants near the U402
and control line of U402
END
No
Yes
Yes
Yes
Yes
No
No
Is speaker ok?
Change Speaker
Yes
No

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-5
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F1001 CHECK
pin13 ≥-65dBm ?
2.RF
1. EGSM RX
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT1001,L1002 contact ?
U902
pin 26,32: 2.8V ?
F1001 CHECK
pin1, 2 ≥-65dBm ?
U1002 CHECK
pin20,21 ≥-65dBm ?
C1003, C1006
resolder or change
F1001
resolder or change
C1005,C1006,L1003
resolder or change
U102 pin39, C112
change or resolder
U903 CHECK
pin 7 : 13MHz ?
Vp-p : 950mV?
OSC801
change or resolder
U902
resolder or change
U702,R701
resolder or change
U902
pin1,2,5,6 Vp-p
:120mV?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-6
This Document can not be used without Samsung's authorization
F1001 CHECK
pin13 ≥-65dBm ?
2. DCS RX
CONTINUOUS RX ON
RF INPUT : 698CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT1001,L1002 contact ?
U902
pin 26,32: 2.8V ?
F1001 CHECK
pin3, 4 ≥-65dBm ?
U902 CHECK
pin21,22 ≥-65dBm ?
C1008,C1009
resolder or change
F1001
resolder or change
C1008,C1009,L1004
resolder or change
U102 pin39, C112
change or resolder
U903 CHECK
pin 7 : 13MHz ?
Vp-p : 950mV?
OSC801
change or resolder
U902
resolder or change
U703,R704
resolder or change
U902
pin1,2,5,6 Vp-p
:120mV?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-7
This Document can not be used without Samsung's authorization
F1001 CHECK
pin13 ≥-65dBm ?
3. PCS RX
CONTINUOUS RX ON
RF INPUT : 660CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT1001,L1002 contact ?
U902
pin 26,32: 2.8V ?
F1001,F1002 CHECK
pin6 ≥-65dBm ?
U902 CHECK
pin16, 17 ≥-65dBm ?
C1012, F1013
resolder or change
F1001,F1002,R1011
resolder or change
C1012,F1002,C1013,R1011,L1006
resolder or change
U102 pin39, C112
change or resolder
U903 CHECK
pin 7 : 13MHz ?
Vp-p : 950mV?
OSC801
change or resolder
U902
resolder or change
U704,R705
resolder or change
U902
pin1,2,5,6 Vp-p
:120mV?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-8
This Document can not be used without Samsung's authorization
4. EGSM TX
F1001 pin 12 :
about 2~3
F1003, C1003
check&change
F1001
pin13:2.8V?
U701,U702
check & change
U1001 pin9 :
about 4~5dBm?
F1001,C1015
check & change
U1001
pin 5 : 3.7 V?
NO NO
YES
YES
YES
NO
NO BATTERY, U102
check & change
U1001
pin 6 : 1.2V ?
YES
NO
U1001 pin7
about : -5dBm ?
YES
U1001
pin 3 : 3V?
YES
YES
U1001
change or resolder
NO
U701
check
U701
check
NO
U902
pin14,26,32 : 2.
8V ?
U102 pin39,C112
change or resolder
YES
U903
pin7 : 13MHz ?
Vp-p : 950mV?
U902
pin1,2,4,5:100m
YES
U701
change or resolder
NO
NO
U902
change or resolder
YES
NO OSC801
change or resolder
CONTINUS TX ON CONDITION
TX POWER DAC: 550 CODE APPLIED
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-9
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5. DCS/PCS TX
F1001 pin 10 :
about 2~3
F1003, C1003
check&change
F1001
pin9 : 2.8 V?
U701,U703,U704
check & change
U1001 pin11 :
about 4~5dBm?
F1001
check & change
U1001
pin 4,5 : 3.7 V?
NO NO
YES
YES
YES
NO
NO BATTERY, U102
check & change
U1001
pin 6 : 1.2V ?
YES
NO
U1001 pin1
about : -5dBm ?
YES
U1001
pin 3 : 3V?
YES
YES
U1001
change or resolder
NO
U701
check
U701
check
NO
U902
pin9 : 2.8V ?
U102 pin39,C112
change or resolder
YES
U903
pin8 : 13MHz ?
Vp-p : 950mV?
U902
pin1,2,4,5:100mV?
YES
U701
change or resolder
NO
NO
U902
change or resolder
YES
NO OSC801
change or resolder
CONTINUOUS TX ON CONDITION
CH : 698CH(DCS),660CH(PCS)
TX POWER CODE: 350 CODE Aplied
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

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SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-10
This Document can not be used without Samsung's authorization
15
3
C
B
A
C
5
E
4
3
678
A
B
8
7
6
4
(=>6.2)
2
1
E
D
2
D
R174
0
1UF
C108
1UF
C124
F102
U107
HVDD
3IN
IN
4
8
OUT
OUT7
6
OUT
OUT5
6
5OUT
F109
9
GND
1IN
IN
2
GND
9
IN1
2
IN
IN3
4
IN
OUT
8
7OUT
OUT
F108
R175
100
V108
V107
TXD
27
V_BATT
23
V_BUS8
NC
C105
RXD11
SPK+
SPK-12
TCK
21
TDI
19
18TDO
20TMS
TRST
17
D+
D-10
22F-WE7
GND
24GND
HP/POWER
25
13
MIC+
MOT+14
26
29
29
3
3
3030
31
31
44
5
5
66
32ANT
9
1
1
15
15
1616
22
2828
220NF
C107
CN106
100NF
C137
5
566
7
788
9
9
17
1718
18
19
19
2
2
20
20
2121
3
344
1
1
10
10
11
1112
12
13
1314
14
15
1516
16
51
CN101
R17251
R173
R17151
R17051
51
R16951
R16751
R168
OUT
5
R16651
9
GND
1
IN
IN2
IN3
IN4
8OUT
OUT
7 6OUT
6
7
8
F104
ZD118
1
2
34
5
F106
C131
10PF
10PF
C130
TP2
C138
39PF
C135
R165
1K
C136
NC
VCCD
39PF
R136NC
NC
C134
0
8
899
R139
32
323333
34
343535
44
55
66
77
2525
26
262727
28
28
2929
33
30
30
3131
18
18
1919
2
2
20
20
2121
22
222323
24
24
1010
1111
1212
1313
14
14
1515
16
16
1717
100NF
CN105
11
C128
R154
100
R155
R118
100
47K
V_OSC
F107
10PF
C129
R158100
ZD117
OUTY
5VCC
R157100
U106
3
GND
2
INA
1
NC
4
10PF
C119
1.8V
ZD105
33K
R119
R1370
R161
R156100
NC
R124
VBAT
1K
34
1
NC
C125
6
7
8
LED108
2
ZD116
1
2
34
5
3.9
R150
R164100
R153
R152150
150
R151
100
8
R149
3.9
ZD115
1
2
3
4
5
6
7
13
2
Q108
13
2
Q109
100
15K
R148
R159
R134
15K
0
R144
47PF
C121
15K
R135
C120
ZD114
7788
99
100NF
55
50
50
51
5152
52
53
5354
54
5555
66
42
42
43
4344
44
45
4546
46
47
4748
48
49
49
35353636
37373838
3939
44
4040
41
41
2828
2929
33
3030
31313232
33333434
2020
21212222
23232424
25
252626
2727
13131414
15151616
17171818
1919
22
CN102
11
1010
11111212
C133
NC
C118
39PF
R147
0
TP1
C103
VCCD
NC
C102
NC
VCCD
C126
VBAT
10PF
18
VCCD
F101
VREF
31
X+
1X-
Y+
32
2Y-
20
_DAV
7_KBIRQ
_PENIRQ22
_SS
R2
11
R3
R4
12
SCLK17
VBAT1
4
VBAT2
5
VDD
29
30
VDD
6
MISO
MOSI19
NC
9
NC24
25
NC
37NC
NC
38
8R1
101415
C3
16
C4
GND
3
33
GND
GND
34
35
GND
GND
36
21
U102
23
AOUT
ARNG
26
28
AUX1
AUX2
27
13
C1
C2
2
3
4
5
6
7
8
ZD110
1
100NF
C116
1UF
C115
34
1
100K
R140
OUT5
LED107
2
U103
4
BYP
EN
3 2GND
1IN
Q107
13
2
VBAT
47PF
C123C122
47PF
C101
330PF
12
12
MENU
KEYPAD
12
KEYPAD
OVER
2
DD-DOM-4PIE
CLR
12
KEYPAD
UNDER
KEYPAD
END_PWR
1
2
KEYPAD
INTERNET
1
SEND
KEYPAD
12
R101
R102
100K
3
1
1.8VVCCD
100K
Q102
2
100R129
3.9
R128
R132
R130
1503.9
1
2
34
5
6
7
8
C104
100NF
4
1
ZD107
LED105
23
Q106
13
2
13
2
Q104
13
2
Q105
VBAT
C113
47PF
ZD108
1
2
34
5
6
7
8
FB3
2
GND
SW1
VIN
5
4_SHDN
1NF
C114
U101
33K
R138
Q101
D3
G
1
S2
ZD112
1
2
34
5
6
7
8
234
1
SPK1
LED106
2.2UF
C100
R103
5.6
KEYPAD
STO
12
R104
33
12
KEYPAD
RIGHT
12
47PF
LEFT
KEYPAD
47PF
C112
C111
ZD103
1
2
34
5
6
7
8
ZD109
1
2
34
5
6
7
8
22uH
L101
R127
150
R131
100
ZD102
1
2
3
4
5
6
7
8
ZD101
2
3
4
5
6
7
8
ZD104
LED-
ZD111
1
VREF
HREFSCL
CAM_D(5)
SDA
CAM_D(7)
P_CLK
CAM_D(4)
CAM_D(6)
CAM_D(2)
CAM_D(1)
FKEY_EN
VBAT
LCD_AD(1)
LCD_AD(3)
LCD_AD(5)
LCD_AD(7)
HSYNC
TK_YD
TK_YU
LED-
LCD_RST
LCD_AD(0)
LCD_AD(2)
LCD_AD(4)
LCD_AD(6)
XCS
TK_XL
TK_XR
CAM_D(0)
CM_CLK
CAM_D(3)
CAM_D(6)
CAM_D(4)
CAM_D(2)
CAM_D(0)
LCD_AD(6)
LCD_AD(4)
LCD_AD(2)
LCD_AD(0)
TK_IRQ
TK_CS
UP_SDI
TK_SDO
LED+
VSYNC
SDA
V_OSC
SVC_GREEN
KEY_ROW(2)
KEY_ROW(1)
KEY_ROW(0)
PWR_ON
FKEY_EN
XCS
VSYNC
HSYNC
CM_CLK
DIM_EN
CAM_D(1)
CAM_D(3)
CAM_D(5)
CAM_D(7)
LCD_AD(1)
LCD_AD(3)
LCD_AD(5)
LCD_AD(7)
VREF
HREF
P_CLK
UP_SCLK
SPK1P
SPK1N
RST
SCL
SVC_BLUE
SVC_RED
KEY_COL(2)
KEY_COL(1)
KEY_COL(0)
BACKLIGHT_EN
SVC_GREEN
SVC_RED
KEY_ROW(0)
KEY_COL(0)
UP_SCLK
HVDD
TK_CS
TK_XL
TK_YD
TK_XR
TK_YU
UP_SDI
TK_SDO
TK_IRQ
FKEY_EN
KEY_ROW(1)
KEY_ROW(0)
KEY_ROW(2)
PWR_ON
SDA
HSYNC
LCD_RST
RST
SVC_RED
SVC_BLUE
SVC_GREEN
VCCD1.8V
VSYNC
SCL
HVDD
SVC_GREEN
SVC_RED
SVC_BLUE
KEY_COL(1)
KEY_COL(2)
KEY_ROW(2)
KEY_COL(0)
KEY_COL(2)
KEY_COL(1)
LED+
BACKLIGHT_EN
VBAT
DIM_EN
XCS
SPK1N
SPK1P
RST
PWR_ON
KEY_ROW(1)

SAMSUNG Proprietary-Contents may change without notice
SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-11
This Document can not be used without Samsung's authorization
8
POWER
5
4
D
B
2367
2
1
F
C
8
4
E
D
C
E
7
5
A
3
1
A
B
F
6
10UF
10V
R110
10
C107
5
6
3
1
4
C110
1UF
Q102
2
NC
R114
R104
3K
22UF
6.3V
C122
10K
D102
R112
10K
R102
R103
47K,1%
VBAT
C109
C117
1UF
1UF
NC
R115
3.3
R113
C112
1UF
33PF
C104
1
3
2
VBAT
C101
Q103
C121
33PF
D101
220NF
D103
C114
1UF
30
VREF
12
VRTC
48
VSIM
3.3
R116
31
VL5S_B
9
VLDO_1
11
VLDO_2
VLDO_339
37
VLDO_4
33
VLDO_5
VLDO_642
VLDO_740
38
VDD34
34
VDD5
41
VDD67
VEXT
1
4
VIB_DRV
VL4S_A36
35
VL4S_B
VL5S_A32
51
SIM_RST
49
UP_CLK
53
52UP_IO
54UP_RST
3VACC
2VBAT
VDD1210
19
RESETN
RING_DRV
5
55RING_PWM
RTC_ALMN
13
17SCLK
15SDI
16SDO
50
SIM_CLK
SIM_IO
28
INTRQ
14
LED1_DRV
78
LED2_DRV
20PSW1_BUF
PWR_KEEP
21
46PWR_SW1N
PWR_SW2
47
61
62GND
GND
63
64GND
65GND
GND
66
GNDD
60
6
GNDD1
GNDQ
25
EN_5
EN_5A
26
27
EN_5B
57GND
67GND
GND
68
GND
58
59GND
GND
45
ADC_TRIG
56
43BTEMP
CREF
29
CSN
18
EN_3
22
23
EN_4[0]
EN_4[1]
24
U102
44ADC_AUX1
ADC_AUX2
1UF
C113
VBAT
VRTC
VRF
100NF
C108
C102
100NF
C119
330K
R106
G
89
GG
10
1UF
11
2
2
33
44
5
5
66
7
G
R111
CN101
1.2K
VOSC
C120
1UF
C105
33PF
NC
C115
1
ISENSE
PROG
4
3
VCC
5
VSENSE
U101
DRIVE
6
GND
2
M101
NEG
2
POS
1
VBAT
VCCA
VCC_1.8A
4
1UF
C116
Q101
3
1
2
5
6
10UF
10V
VPAC
VCCD
C106
Q104
13
2
C103
C118
100PF
2.2UF
C111
1UF
KEY_BL
VCCB
JIG_ON
SIMCLK
SIMRST
RST
KEY_ROW(0)
KEY_COL(3)
CHG_DET
TA_VEXT
KEY_BL2
SIMDATA
VREF
TA_VEXT
UP_SCLK
UP_CS
EN_VRF
EN_VPAC
TA_VEXT
CHG_ONICHRG
TA_VEXT
XOENA
PWR_KEEP
PWR_ON
RTCALARM
UP_SDI

SAMSUNG Proprietary-Contents may change without notice
SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-12
This Document can not be used without Samsung's authorization
D
1
7
D
4
B
F
NC
LCDCONNECTOR
6
KEYPAD
E
2
A
NC
NC
NC
NC
E
IRDA
B
5
3
C
C
NC
F
7
4
38
A
5
2
8
1
6
100NF
C240
12
12
0
KEYPAD
8
R209
3.3
9
KEYPAD
ZD202
1
2
34
5
6
7
R216
47K
V212
V211
R217
47K
GND
1
IN
IN2
3
IN
IN4
8OUT
OUT
7
6OUT
OUT
5
F202
9
10PF
C244
R203
100
2
C251
8
7OUT
OUT
6
5OUT
5
KEYPAD
12
F203
GND
9
IN1
2
IN
IN3
4
IN
OUT
47PF
C248
47PF
C247
R206
3.3
5
TXD
3
6VCC
47PF
C250
LED217
7GND
LEDA
1
2LEDC
4RXD
SD
12
D201
3
KEYPAD
220PF
C242
LED212
12
R212
KEYPAD
F4
CN202
2A
C
3
G
1
G
4
22
1IN
IN
2
3IN
IN
4
8
OUT
OUT7
6
OUT
OUT5
R201
F201
9
GND
LED202
0
R222
12
100K
LED201
7
KEYPAD
R221100K
22
V210
12
R211
KEYPAD
4
VCCD
0
R223
C203
VCCD
R2240
VCCB
6.3V
10UF
V209
LED203
47PF
C249
R214
KEYPAD
6
12
68
100K
R233
VCCD
LED207
0
R225
C241
10PF
VBAT
C252
ERR25
4GND
SD1
2
3SD2
1VIN8
VOUT1
7
VOUT2
U203
ERR16
R22647
C253
NC
NC
L201
82
C255
100NF
VBAT
R202
LED209
LED206
CN205-1
1
IN
1
2IN
IN
3
4IN
OUT8
7
OUT
OUT6
5
OUT
F204
GND
9
1
KEYPAD
12
V206
LED211
V216
V207
V208
C239
100NF
C237
1UF
88
99
LED204
50
51
5152
52
53
5354
54
5555
66
77
43
4344
44
45
454646
47
4748
48
4949
55
50
3636
37373838
39
39
44
4040
41
4142
42
29
33
3030
31
313232
33333434
3535
212222
23232424
25
252626
27272828
29
1414
15151616
17
171818
1919
22
2020
21
CN201
1
1
1010
11111212
1313
V205
VBAT
V215
F209
R23051
R232
VBAT
75
68
51
R229
R204
C238
LED208
51
330NF
KEYPAD
8
12
R231
C202
10UF
6.3V
V214
8
C243
47PF
ZD201
1
2
34
5
6
7
2
10UF
C254
F3
KEYPAD
12
KEYPAD
2
1
3.3
39
R207R208
100
3 GND
OUT
2
VCC
1
R228
U202
5
R220100K
GND
1
IN
IN2
3
IN
IN4
8OUT
OUT
7
OUT
6
OUT
KEY_BL2
F208
9
XCS
VSYNC
HSYNC
CM_CLK
KEY_BL
KEY_COL(0)
UP_SCLK
TK_SDO
UP_SDI
TK_CS
LCD_AD(0)
LCD_AD(2)
LCD_AD(4)
LCD_AD(6)
RST
SCL
PWR_ON
PEN_IRQ
TK_SDO
UP_SDI
UP_SCLK
KEY_ROW(1)
KEY_ROW(0)
KEY_ROW(2)
KEY_COL(1)
KEY_COL(2)
KEY_ROW(1)
KEY_ROW(4)
KEY_ROW(2)
KEY_ROW(3)
KEY_ROW(0)
KEY_COL(3)
KEY_COL(2)
KEY_COL(0)
FKEY_EN
SVC_GREEN
VOSC
SDA
SPK1P
LCD_AD(3)
LCD_AD(5)
LCD_AD(7)
V_MOT
VIB_EN
V_LED
V_MOT
KEY_ROW(5)
CAM_D(4)
DIM_EN
CAM_D(3)
CAM_D(5)
P_CLK
CAM_D(7)
VREFER
BACKLIGHT_EN
CAM_D(1)
CAM_D(6)
LCD_AD(1)
SVC_RED
SVC_BLUE
KEY_COL(1)
KEY_COL(0:3)
KEY_ROW(0:5)
FLIP_SNS
IRDA_EN
IRDA_RX
IRDA_TX
SPK1N
HVDD
CAM_D(0)
CAM_D(2)
HREFER

SAMSUNG Proprietary-Contents may change without notice
SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-13
This Document can not be used without Samsung's authorization
A
GND
VF
CF
VEXT
5
A
B
7
7
DEBUG_RXD
DEBUG_RI
4
4
SDS_TXD
SDS_RXD
E
DEBUG_DCD
5
6
F
DEBUG_CTS
1
JIG_ON
C
6
VTEST
C
3
DEBUG_DTR
GND
8
DLC_DETECT
DEBUG_DSR
DD
GND
8
DEBUG_RTS
VEXT
2
E
F
DEBUG_TXD
1
2
VCCD
B
VBAT
I/FCONNECTOR
3
12
R3091K
3
4
1
9
10
VCCD
C302
100NF100NF
C303
VBAT
1K
R304
R318
13
1K
R3061K
47K
R301
7
V301
18
V302
1K
R322
1K
ZD304
ZD302
2
1345
R319
R313
R3211K
1K
1K
R320
1K
R312
C306
NC
R315
R316NC
10V
10UF
100NF
R314NC
C304
100NF
C301
23
21
20
22
19
15
345
16
11
ZD303
2
1
1K
24
R310
2
1K
47K
R302
R305
2
1345
C305
33PF
ZD301
VCCD
14
R303
47K
8
VCCD
5
6
17
R317
ZD305
TA_VEXT
DAIDO
DEBUG_DCD
DEBUG_RXD
DEBUG_DSR
DEBUG_RI
DAICK
NC
DAIDI
DAIRN
DEBUG_TXD
JIG_ON
SDS_TXD
SDS_RXD
DLC_DETECT
DEBUG_RTS
DEBUG_DTR
DEBUG_CTS
BP_VF
CF

SAMSUNG Proprietary-Contents may change without notice
SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-14
This Document can not be used without Samsung's authorization
F
3
7
45
B
8
24
26
A
1
6
AUDIO
C
3
8
E
E
1
F
D
A
5
B
C
D
7
10NF
C438
C43622UF
C430
22NF
4V
1.8K
R412
C435
100NF
82K,1%
R411
18
SPOUT2
SPVDD15
16
SPVSS
VDD
7
VREF
9
8
VSS
29/CS
10
HPOUT-L/MONO
HPOUT-R11
32IOVDD
2
LED
MTR
19
NC
56
PLLC
SPOUT1
17
20
D7
12
EQ1
EQ213
14
EQ3
CLKI
1
27D0
D1
26
D2
2524
D3
D4
2322
D5
D6
21
U402
A0
30
C44022UF
4V
NC
C428
1NF
C426
12K
R425
C419
NC
100NF
C417
C427
27PF
C443
33UF
C420
33PF
C423
100NF
1NF
C416
150PF
C401
C412
F402
NC
23
1
10K
R423
7
Q401
F403
F404
C407
47PF
R403
12
22PF
C442
VCCA
C439
10NF
R406
33K
C408
C445
8.2NF
4.7NF
R40112
2.2K
R413
C414
330PF
C444
27PF
R402
100K
R405
82K
VCCA
C44122UF
4V
680
R414
C409
100NF
VBAT
C410
100NF
1
ZD402
F405
NO2V+1
C424
270PF
COM2
9
GND
6
4
IN1
8IN2
NC15
NC2
7
2
NO1
10
R410
U401
COM13
3.3K
3.3K,1%
R416
C429
270PF
ICEBERG-FPCB
MIC401
47K,1%
R418
VBAT
C404
100NF
1NF
C425
1K
R420
10K
R417
4.7UF
C405
6.3V
F401
C403
6.3V
4.7UF
C413
1UF
22NF
C434
R419
NC
R409
18K
1.5K,1%
R415
C431
150PF
82nH
L401
C433
VCCD
1UF
4
3
1
C402
100NF
CN401
2
6
5
6.8K,1%
R408C411
4V
22UF
C437
NC
R407
47PF
C406
1K
R426
56K
VCCD
1
ZD403
C432
150PF
150K
R404
R421
NC
MICIN
AOUTBN
C415
33PF
AOUTBP
AUDIO_AMP_EN
JIG_MIC
SPK1P
JIG_SPKN
SPK1N
JIG_SPKP
AOUTAN
YMU_SPK1N
YMU_SPK1P
RST
JACK_IN
EAR_SWITCH
VIB_EN
LED_DATA
AOUTAP
D(5)
D(6)
D(7)
D(4)
D(3)
D(1)
D(0)
CP_WEN
CP_OEN
A(0)
YMU_EN
AUXOUT
AUXIN
MICOUT
CLK13M_YMU
D(2)
YMU_SPK1P
YMU_SPK1N
YMU_IRQ

SAMSUNG Proprietary-Contents may change without notice
SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-15
This Document can not be used without Samsung's authorization
F
E
B
A
E
1
8
5
B
F
A
MEMORY
C
3
6
17
C
7
2
28
4
D
3
D
4
6
5
0
R510
R517NC
0
R518
C506
0
R514
R5070
NC
VCCD
C513
VCCD
100NF
VCCD
20PF
C511
F501
D6
L7VSS4
VSS5
C8
L9VSS6
VSS7
J11
C14
SCANEN
TESTEN
C9
P3
VCP
VSS1
K4
VSS2
G4
VSS3
NC7
2
PIOVDD1F11
C10
PIOVDD2
PIOVDD3L12
D8
PIOVDD4
PLLVDDM4
N3
PLLVSS
L4
F4
HIOVDD2
HIOVDD3D7
D5
HIOVDD4
NC1
A1
P1NC2
NC3
A14
P14NC4
NC5
E5
1NC6
A2
M12
GPIO2
P13
GPIO20B2
GPIO21
GPIO3N12
M13
GPIO4
GPIO5M14
B11
GPIO6
GPIO7L14
B10
GPIO8
GPIO9L13
HIOVDD1
GPIO1P12
P2
GPIO10
GPIO11N2
N1
GPIO12N14
GPIO13N13
GPIO14
GPIO15B1
A13
GPIO16
GPIO17B14
B13
GPIO18
GPIO19
FPDAT7
FPDAT8
C12
FPDAT9
G12
FPFRAME
C13
FPLINE
D12
FPSCLK
F13
F14FPSHIFT
FPSO
K12
A9FPVIN1
B9FPVIN2
A10
GPIO0
J13
J12FPDAT13
FPDAT14
H12
D13FPDAT15
H13FPDAT16
H14FPDAT17
FPDAT2
F12
E14FPDAT3
FPDAT4
E13
E12FPDAT5
FPDAT6
D14
G14
J14FPA0
FPCS1X
G13
A11FPCS2X
FPDAT0
A12
B12FPDAT1
FPDAT10
K13
K14FPDAT11
FPDAT12
CNF3
CNF4
E11
CNF5
D11
CNF6
L10
COREVDD1
L5
D10COREVDD2
COREVDD3
H11
M5
CM2DAT3
CM2DAT4L6
M6
CM2DAT5
CM2DAT6P5
N6
CM2DAT7
P6CM2HREF
N7CM2VREF
CNF0
G11
L11CNF1
CNF2
K11
D9
M11
N11
CM1DAT5
CM1DAT6P10
P11
CM1DAT7
M8CM1HREF
N8CM1VREF
M7CM2CLKIN
CM2CLKOUT
P7
CM2DAT0P4
N4
CM2DAT1
CM2DAT2N5
CIOVDDL8
CLKI
M1
M9CM1CLKIN
P8CM1CLKOUT
CM1DAT0N9
P9
CM1DAT1
CM1DAT2N10
CM1DAT3M10
CM1DAT4
U502
100NF
R512
VCCD
C512
4.7K4.7K
R511
0
C510
100NF
R509NC
R508
VCC_1.8A
VCC_1.8A
R515NC
R5190
VBAT
C507
100NF
VCCD
0
R506
33UF
6.3V
C508
0
R516
10K
R520
C515
NC
VCC_1.8A
NC
R505
C505
10NF
VCC_1.8A
VCCD
C514
100NF
R513
100NF
NC
C509
47K
100NF
C502
R504
VCCD
C501
100NF
WP#
100NF
C503
VSS
VSSL5
L6
VSS
VSSL7
L8
VSSL1
VSS
WAIT
G7
WE#
F5
E4
VCC2
VCC2
K6
VCCQ
J8
K7VCCQ
VCCQ
L3
VPP/VPEN
D4
B4
VSS
VSSC4
L2
K2
RFUK3
RST#
F4
S-CS1J1
C5
S-CS2
S-VCCK4
B5VCC1
VCC2
L4
B6
H8
P-CS#D6
P-MODE
K8
K5P-VCC
R-LB#
C2
R-OE#
H1
R-UB#
F3R-WE#
D5
RFU
DU
M1
DU
DUM2
M7
DU
DUM8
NC1
2
NC
J2OE#1
OE#2
D5
D6J6
H7
D7
D8G2
J3
D9
DUA1
A2
DU
DUA7
A8
D11
D12H5
G6
D13
D14H6
J7
D15
D2G3
H4
D3
D4J5
G5
A9
ADV#
E5
K1CE#1
G8CE2
C6CLK
D0H2
H3
D1
D10G4
J4
E6
B7A21
D1A3
A4
B1
C1A5
A6
F2
E2A7
A8
F6
D7
A13
A14
F7
E8A15
A16
F8
D2A17
A18
B2
B3A19
A2
E1
A20
1GB
C3
256MB
D3
512MB
A0
G1
F1A1
A10
E7
B8A11
A12
C8
D8
U500
128MBC7
E3
C504
R503
10
10NF
U501
EN
1
3GND
IN5
NC
2
OUT4
CAM_D(6)
CAM_D(5)
CAM_D(4)
CAM_D(3)
CAM_D(2)
CAM_D(1)
CAM_D(0)
P_CLK
A(1)
HVDD
D(6)
D(5)
D(4)
D(3)
D(2)
D(15)
D(14)
D(13)
D(12)
D(11)
D(10)
D(1)
D(0)
VREFER
HREFER
CAM_D(7)
RST
CP_WEN
LCDC_RST
HSYNC
VSYNC
XCS
D(9)
D(8)
D(7)
FKEY_EN
CAMPWR_ON
CLK32K
UPPER_BYTE
CP_OEN
MLCD_EN
CM_CLK
LCDC_RST
LCD_AD(2)
LCD_AD(3)
LCD_AD(4)
LCD_AD(5)
LCD_AD(6)
LCD_AD(7)
D(0:15)
CAM_D(0:7)
HVDD
CAMPWR_ON
SCL
SDA
DIM_EN
BACKLIGHT_EN
D(10)
D(11)
D(12)
D(13)
D(14)
D(15)
A(23)
LCD_AD(0:7)
LCD_AD(0)
LCD_AD(1)
A(18)
A(19)
A(20)
A(21)
A(22)
D(0:15)
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
MEM_RST
FLASH_RESET
CP_CSROMEN
CP_CSROM2EN
CP_OEN
CP_CSRAMEN
A(0)
UPPER_BYTE
MEM_RST
CP_WEN
A(1:22)
A(1)

SAMSUNG Proprietary-Contents may change without notice
SGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams
2-16
This Document can not be used without Samsung's authorization
2
9
11
1
C
TRIDENT
H
G
A
B
6
G
10
12
11
F
9
3
4
CC4V-T132.768KHz12.5pF
JTAG
F
8
8
2
412
H
5
5
7
D
C
6
A
E
3
110
D
7
B
E
TP602
22NF
C609
XRTCALARM_NE8
XSM0_CLK
N10
U12XSM0_DATA
XTIC_MODED12
F10
XVREF
XPA3/CS4N
N14
XPA4/OEN
P16
XPA5/WAITN
P15
T15XPA6/BE1N
XPA7/IRQ1
M9
T5XPA8/IRQ2
XPA9/IRQ3
P2
XPWM1
R5
M11XPA2/CS3N
F3XPA30_IM0
XPA31_IM1
E1
H14
XPA32_CS0N
N17XPA33_T_REQA
XPA34_T_REQB
M17
XPA35_A22L13
N15
XPA36_A23_CS5N
XPA22/SSN
J6
H6XPA23/PWM2
H5XPA24/PWM3
XPA25_OM0
M3
XPA26_OM1
G2
G4XPA27_SM1_CLK
XPA28_IOM0
G5
XPA29_IOM1
F1
XPA15/TX0
H4
L3XPA16/RX0
XPA17_DRQ0
E4
P13XPA18_T_ACK
XPA19/CP_MOSI
L2
M14XPA1/CS2N
L1XPA20/CP_MISO
K4XPA21/CP_SCK
F4XFRSTB
C6
XOSC32OUT
XPA0/CS1N
M15
N2XPA10/IRQ4
XPA11/IRDARX
K5
N1XPA12/IRDATX
XPA13_TX1
G6
G3XPA14_RX1
XCP_KB7/SOUT2
P3
XCP_KB8/SOUT3
T4
N3XCP_KB9/SOUT4
D7XCP_TCK
XCP_TDO
D13
XCP_TMS
G8
F9XCP_TRSTN
C13XCP_WEN
C7XCP_TDI
XCP_KB0/SIN0
L4
L5XCP_KB1/SIN1
XCP_KB2/SIN2
M4
T1XCP_KB3/SIN3
R2XCP_KB4/SIN4
XCP_KB5/SOUT0
T3
U3XCP_KB6/SOUT1
F8XCP_D2
XCP_D3
F7
C5XCP_D4
XCP_D5
D6
XCP_D6
E7
D5XCP_D7
C4XCP_D8
XCP_D9
B4
XCP_D0
A6
B5XCP_D1
XCP_D10
B3
C1XCP_D11
XCP_D12
C2
D2XCP_D13
D3XCP_D14
XCP_D15
E3
B15XCP_A4
XCP_A5
C14
A16XCP_A6
XCP_A7
A15
XCP_A8
B17
C17XCP_A9
A13XCP_CSRAMEN
XCP_CSROMEN
A12
K12XCP_A16
XCP_A17
K13
K14XCP_A18
XCP_A19
L14
XCP_A2
E14
XCP_A20
L15
L16XCP_A21
D15XCP_A3
B13XCP_A0_BEON
F11XCP_A1
D16XCP_A10
XCP_A11
F14
XCP_A12
G14
G13XCP_A13
XCP_A14
G17
J12XCP_A15
X1RTCA7
D10
X2RTC
B11
XAG0
XAG1A11
XAG2E11
D11
XAG3
XBSWNB7
XCPTSTSTOP_CKOM12
VSSG9
G10
VSS
VSSH7
VSSH11
J7
VSS
K6
VSS
E10
VSSA
E15
VSS_DPLL
VSSL6
L10
VSS
VSSM7
L8
VSS
J11
VSS
VSSL9
A3
VSS
F6
VSS
VDDEU16
N16
VDDE
VDDEE16
E17
VDDE
VDD_DPLLG16
VRTCD8
VSSA2
VSSK7
VDDC16
VDDAC11
B1
VDDE
VDDEB14
VDDEM1
U2
VDDE
VDDEP8
U15
VDDE
L17
VDD
G1
VDD
VDDR1
R4
VDD
VDDT13
R16
VDD
VDDR17
A5
VDD
RSTBC12
RWNU5
TCKH13
TDIH12
F12
TDO
G12
TMS
TRSTF15
VDDE2
P7
DB#8
DB#9N7
N4
INT#0R12
IO7
IOBIT#1K11
IOBIT#2L12
NC1
2
NC
R11
DB#14
DB#15P10
R6
DB#2
DB#3P6
U7
DB#4
T7
DB#5
DB#6R7
M6
DB#7
F17
CKI
G15
CKO
DB#0P5
U6
DB#1
DB#10N8
M8
DB#11
DB#12U11
T11
DB#13
AB#1M10
R13
AB#2
N11
AB#3
AB#4P11
P12
AB#5
AB#6R14
AB#7T14
T17
AB#8
VCC_1.8A
U601
U13
AB#0
33K,1%
R607
VCC_1.8A
TDI_1
TCK_1
TMS_1
NC
TRST_1
R604
10NF
C604
R610
47K
33NF
C607
OSC601
C612
NC
C603
10NF
VCCD
R601
47K
100K
R609
C602
220NF
R606
10K,1%
R605
47K
F_WE_1
TDO_1
VCCB
C605
10NF10NF
C606
33K,1%
R608
R602
10K
VCCB
R603
1M
VBAT
C615
12PF
GND
3
2VOVS1
U602
C608
100NF
19TDI
TDO
18
TMS
20
17TRST
27TXD
23V_BATT8
V_BUS
GND7
GND
24
25HP/POWER
MIC+13
14
MOT+
RXD
26
SPK+11
12
SPK-
21TCK
4
4
55
6
6
ANT
32
D+9
10
D-
F-WE
22
11
1515
16
16
2
2
28
28
2929
33
30
30
3131
CN602
JTAG-32PIN
12PF
C613
VCCD
220NF
C601
C614
330NF
10NF
C611
VRTC
VCCD
C610
27PF
VCC_1.8A
GND_1
VCC_1.8A
TP600
PEN_IRQ
DSP_RWN
TR_RST
TK_CS
CHG_ON
UP_SDI
UP_SCLK
ANT
JIG_SPKP
JIG_SPKN
JIG_MIC
V_MOT
SDS_TXD
SDS_RXD
JIG_ON
VBAT
DSP_TDO
DSP_TDI
DSP_TMS
DSP_TCK
RST
AUDIO_AMP_EN
A(23)
ICHRG
DLC_DETECT
EAR_SWITCH
MLCD_EN
YMU_EN
CHG_DET
TK_SDO
KEY_ROW(5)
DSP_TCK
DSP_TDI
DSP_TDO
DSP_TMS
TR_RST
UP_CS
FLASH_RESET
VREF
CP_CSROM2EN
TR_RST
KEY_COL(0:3)
KEY_ROW(0)
KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
KEY_COL(0)
A(21)
DEBUG_DTR
DEBUG_RTS
LED_CON
DSP_AB(8:0)
CP_TDO
TR_RST
CP_TDI
CP_TMS
DSP_AB(8)
CLK32K
RTCALARM
BP_VF
JACK_IN
DEBUG_DSR
TR_RST
CP_TCK
DSP_DB(15:0)
D(0:15)
A(0:20)
KEY_ROW(0:5)
KEY_ROW(4)
KEY_ROW(3)
KEY_ROW(2)
KEY_ROW(1)
CP_INT
IRDA_RX
DEBUG_RXD
SDS_RXD
SIMDATA
SIMCLK
DEBUG_RI
DSP_IO
DSP_RWN
DSP_INT
TR_RST
CLK13M_TR
A(22)
CP_CSROMEN
CP_CSRAMEN
CP_WEN
CP_OEN
DEBUG_DCD
UPPER_BYTE
FLIP_SNS
YMU_IRQ
IRDA_TX
SIMRST
PWR_KEEP
DEBUG_TXD
DEBUG_CTS
IRDA_EN
SDS_TXD
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)
DSP_DB(6)
DSP_DB(7)
DSP_DB(8)
DSP_DB(9)
LED_DATA
D(1)
D(10)
D(11)
D(12)
D(13)
D(14)
D(15)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
DSP_DB(0)
A(14)
A(15)
A(16)
A(17)
A(18)
A(19)
A(2)
A(20)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
D(0)
DSP_AB(0)
DSP_AB(1)
DSP_AB(2)
DSP_AB(3)
DSP_AB(4)
DSP_AB(5)
DSP_AB(6)
DSP_AB(7)
A(0)
A(1)
A(10)
A(11)
A(12)
A(13)