Samsung SGH-E400 User manual
SGH-E400
SERVICE
Manual
GSM TELEPHONE CONTENTS
1. Specification
2. Exploded Views and Parts List
3. Electrical Parts List
4. Flow Chart of Troubleshooting
5. Block Diagrams
6. PCB Diagrams
GSM TELEPHONE
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1. SGH-E400 Specification
1-1
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1. GSM General Specification
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 -
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SGH-E400 Specification
1-2
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2. GSM TX power class
TX Power
control level GSM900
5 33±2dBm
6 31±2dBm
7 29±2dBm
8 27±2dBm
9 25±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
TX Power
control level DCS1800
0 30±3dBm
1 28±3dBm
2 26±3dBm
3 24±3dBm
4 22±3dBm
5 20±3dBm
6 18±3dBm
7 16±3dBm
8 14±3dBm
9 12±4dBm
10 10±4dBm
11 8±4dBm
12 6±4dBm
13 4±4dBm
14 2±5dBm
15 0±5dBm
TX Power
control level PCS1900
0 30±3dBm
1 28±3dBm
2 26±3dBm
3 24±3dBm
4 22±3dBm
5 20±3dBm
6 18±3dBm
7 16±3dBm
8 14±3dBm
9 12±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-E400 Exploded View and its Parts list
2-1
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1. Cellular phone Exploded View
1
2
4
5
6
7
8
9
10
11
12
13
17
18
19
20
16
15
14
3
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SGH-E400 Exploded view and its Part list
2-2
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NO Description SEC.CODE REMARK
1DUAL WINDOW LCD GH72-07016A
2FOLDER UPPER GH75-02792D
3LCD GH07-00303A
4SPEAKER 3001-001402
5MOTOR GH31-00051A
6FOLDER LOWER GH75-02791A
7MAIN WINDOW LCD GH72-07015A
8SCREW 6001-001478
9FRONT COVER GH75-02790E
10 VOLUME KEY GH75-02795A
11 KEYPAD GH75-02794A
12 MAIN PBA GH92-01465A
13 ANTENNA GH42-00274A
14 DOME SHEET GH59-00724A
15 MIC GH30-00047A
16 CONNECTOR COVER GH72-07032A
17 REAR COVER GH75-02796A
18 SCREW 6001-001478
19 RF COVER GH73-01819A
20BATTERY GH43-00826A 900MAH
GH43-00827A 700MAH
2. Cellular phone Parts list
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SGH-E400 Exploded view and its Part list
2-3
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3. Test Jig (GH80-00865A)
3-1. RF Test Cable
(GH39-00090A)
3-2. Test Cable
(GH00-00127A)
3-3. Serial Cable
3-4. Power Supply Cable 3-5. DATA CABLE
(GH39-00159A)
3-6. TA
(GH44-00184A)
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3. SGH-E400 MAIN Electrical Parts List
3-1
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SGH-E400 Electrical Parts List
3-2
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SGH-E400 Electrical Parts List
3-3
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SGH-E400 Electrical Parts List
3-4
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SGH-E400 Electrical Parts List
3-5
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4. SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-1
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1.Baseband
1. Power ON
Check the current
consumtion more than
100mA
Check the
Vbat(battery+O)
Voltage more than
3.3V
Downloader again
NO
Charge the Battery
NO
Check U100 and C113
NO
YES
YES
YES
YES
'Power On' does not
work
Check the pin
15 of U100 is more
than 2.8V
U100 pin 46,39
=2.8V
U100 pin 13
=1.8V
Checktheclocksignal
at
pin4 of U800
Freq=13MHz ?
Vrms°√300mV ?
Vpp is around
900mVpp
Check the clock generation circuit
(related to OSC801 and U800)
NO
'Power On' does not
work
YES
END
YES
Check U100 and C116
NO
Check U112
NO
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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-2
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2. Initial
3. Sim Part
Check the signal at the
pin28ofU100is
"High" when the phone
is boot on
Check the pin 22 of
U100 is "High"
Check U100
NO
Check the U700
NO
Check the soldered status of
OSC801, R803, U100
NO
YES
YES
YES
Initial Failure
Check the pin 4 of
OSC801 is around 2.8V
Check and resolder LCD connector CN200
if there is solder bridhe between the pins
END
YES
Check the SIM
connector's (CN100)
connector's to SIM card
Check the circuit related to
U100
NO
resolder or change CN100
NO
Check the related circuit of
CN100
NO
YES
YES
YES
Phone can't access SIM card
Check the circuit around U601 output
and voltage supply circuitry
END
YES
Check the pin 1 of CN100.
Voltage = 3V?
Check the circuit around CN100 input
circuitry
Check the related circuit of
U601 and U100
NO
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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-3
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4. Charging Part
Check U100
NO
Check the U601
NO
Check the Q101
NO
YES
YES
YES
Abnormal charging part
END
YES
Check the pin 17,18 of
CN302 VEXT is > 4V?
Check the pin 2 of U103
is "LOW"?
Check the pin 3 of Q101
is "LOW"?
Check the pin 5 of U102
is "3.2~4.2"?
Check if ICHRG is 1V
(during charging) and
around 180mV(full
charging)
YES
Check the U102
NO
Resolder or change R111
NO
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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-4
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PWR_SW1
VRTC
Q100
1
3
2
VRTC
R101
0
330K
R110
100NF
C124
2.2UFC116
2.2UF
C114
100NF
C119
VRF
0
R106
G
10
2
2
3344
5
5
66
7
G
G
8
9
G
CN100
11
6.3V
10UF
C126
M1
NEG
2POS
1
VCCB
VBAT
2.2UF
C123
2.2UF
C117
10K,1%
33PF
C107
R111
390K
R102
VBAT
VPAC
33PF
C106C103
VCCD
33PF100NF
C108
10V
10UF
C127
GND
ISENSE
1
4
PROG
VCC
3
VSENSE5
U102
6
DRIVE
2
C120
2.2UF
2.2UF
C101
R112
10UF
C113
VBAT
47K,1%
U103
2
5
6
3
1
4
C125
100NF
1
2
5
6
4
R100
Q101
3
27_RESET_I
_RESET_O
28
_RTC_ALM
33
1.2K
44
VLDO_4
39
VLDO_5
52
VLDO_7
VREF35
VRTC12
60VSIM
_CS
18
51
43
VL4S_A
VL4S_B42
VL5S_A38
37
VL5S_B49
VLDO_6
13
VLDO_115
VLDO_2
VLDO_346
VDD445
VDD540
VDD648
53
VDD7
58
VDDCP
VDDQ5
VEXT
4
8
VIB_DRV
SIM_RST
61
65UC_CLK
UC_IO
64
UC_RST
66
7VACC
VBAT6
VDD1214
47
VDD3
32PWR_KEEP
PWR_SW2
50
9
RING_DRV
RING_PWM19
SCLK
17SDI
16
62SIM_CLK
SIM_IO
63
GNDA36
55
GNDA56
GNDCP
GNDD110
41
GNDQ
11
LED_DRV
30PSW1BUF
PSW2BUF
31
EN_6
24
25EN_7
EN_R
26
EOR_ACC
67
GND69
70
GND
GND71
72
GND
CPCN
57CPCP
59
34
CREF
CHG_STAT0
1
20EN_3
EN_4/EN_4S
21
22EN_5
23EN_5S
U100
68ACC_ALM
54
BAT_TEMP
CFET_DRV
3
29CHG_DET
2CHG_STAT1
VCCA
C115
2.2UF
2.4
R103
VCC_1.8A
2.2UF
C105
47NF
C109
C118
100PF
C104
100NF
C112
VOSC
TP101
2.2UF
2.2UF
C111
TA_VEXT
3K
R113
PWR_KEEP
TA_VEXT
CHG_ONICHRG
TA_VEXT
SIMDATA
CHG_DET
RESET_INT
PWR_ON
JIG_ON
RTCALARM
EN_VRF
EN_VPAC
XOENA
UP_SDI
UP_SCLK
UP_CS
VIB_EN
KEY_ROW(0)
KEY_COL(2)
BACKLIGHT
RST
VREF
SIMRST
SIMCLK
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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-5
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5. Microphone Part
6. Speaker Part
Check the reference
voltage on mic path
C418 =2.5V
Reassemblage microphone
NO
resolder or change
C400,R408,R409,R405,R406)
NO
Check U700
NO
YES
YES
Microphone does not work
END
YES
Check the assembled
status of microphone.
Is microphone ok?
Resolder and check the board
to board connector
NO
Check U700
NO
Change or resolder
U700, R205, R206
NO
YES
YES
YES
Speakerdoesnotwork
END
Check the connection
status spk to CN200
Check the
R460 = 'High' ?
Check U700, R201, R202
Is speaker ok?
YES
Change Speaker
NO
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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-6
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EAR_SPK_P
EAR_MIC_P
JACK_IN
C452
10PF
C451
33PF
C409
33UF
680
R408
VCCD
10PF
56K
C492
R406
0
R428
0
33UF
C494
R432
NC
R499
MAIN_MIC
4.7K
R414
10PF
C490
VCCA
C465
VCCA
VCCD
27PF
ZD409
330NF
1UF
C400
C414
c459
180PF
0
R460
4.7K
R409
R424
330K
VCCA
10UF
C462
6.3V
CN401
R410
680
C460
NC
C454
NC
C46415PF
C457
27PF
C496
NC
10PF
C495
91K
R422
10UF
6.3V
R427
C453
8.2K
R420
1K
C491
NC
R4310
L400
R425
100K
100nH
0
R433
10PF10PF
C450
R405
C416
R426
10K
0
200K
R423
56K
R421
NC
R461
C417
ZD404
ZD410
Q400
13
2
C461
39PF
NC
0.5PF
C455
VCCA
C458
AOUTAN
AOUTBP
AOUTBN
SPK1N
JACK_IN
MICOUT
MICIN
AUXOUT
AUXIN
EAR_SWITCH
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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-7
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7. Back Light
END
Select backlight "ON" mode
NO
Check the U601
NO
YES
YES
YES
Backlight does not work
YES
Backlight "ON" mode in
the meue?
Check the PIN 3 of
CN200 = 2.8V?
Check the connection
from CN200 to LCD
Module
YES
Replace FPCB CONNECTOR
NO
Change LCD Module
NO
Check the soldered status of EL pad
LCD backlight on?
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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-8
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8.Alert Tone
Check the connection
from CN200-1 to LCD
Module
Check the circuit related to
U401,R460
NO
Change Speaker
NO
Change LCD Module
NO
YES
YES
Abnormal Alert tone
END
YES
Check the PIN 31, 32 of
CN200-1
Is there alert wave?
Alert is ok?
AlerttoneOnbypushingthekey
*#0289#
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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
4-9
This Document can not be used without Samsung's authorization
(Picture 1)
(Picture 2)
0
44
5
5
66
7
7
88
9
9
R202
28
28
29 29
3
3
30
30
31 31
32
32
33 33
34
34
20
20
21 21
22
22
23 23
24
24
25 25
26
26
27 27
13 13
14
14 15
15
16 16
17
1718
18
19 19
22
CN200 1
1
10 10
11
11 12
12
C200
33NF
330NF
C205
VCCD
R201
12 NC
C206
C207
100PF
R221
0
VBAT
33
R200
MSPK-
AOUTAP
SPK1N
MSPK+
RST
LCDVIB_EN
LED_EN
D(4)_FO
D(6)_FO
RED_LED EL_EN
D(0)_FO
D(2)_FO
GREEN_LED
EL_PWR
D(13)_FO
D(15)_FO
CLCD_EN_FO
CP_WEN_FO
GLCD_EN_FO
A(2)_FO
D(7)_FO
D(8)_FO
D(10)_FO
D(12)_FO
D(14)_FO
D(9)_FO
D(11)_FO D(3)_FO
D(1)_FO
D(5)_FO
R4160
VBAT
C410
6.3V
10UF
29
/IRQ
3
/RD
31
4
/RST
/WR
28
6
PLLC
SPOUT1
1718
SPOUT2
SPVDD
15
16
SPVSS
VDD
7
VREF
98
VSS
/CS 13
14
EQ3
10
HPOUT-L/MONO
HPOUT-R
11
IOVDD
32
LED
2
19
MTR
5
NC
26
D2
25 24
D3
D4
23 22
D5
21
D6
20
D7
12
EQ1
EQ2
U401
30 A0
CLKI
1
27
D0
D1
R470
0
C402
100NF
6.3V
C404
4.7UF
VCCD
3.3K
R413
NC
R434
C403
22NF
C411
1NF
33K
R407
C401
270PF
100NF
C412
100NF
C408
R403 150K
C415
100PF
VCCD
R404
33K
MELODY_LED
MELODY_VIB
D(6)
D(7)
D(4)
D(3)
D(1)
D(0)
CP_WEN
CP_OEN
A(0)
YMU_EN
D(2)
MSPK-
CLK13M_YMU
MSPK+
YMU_IRQ
RST
D(5)
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