Samsung SGH-E710 User manual

SGH-E710
SERVICE
Manual
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
GSM TELEPHONE

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1. SGH-E710 Specification
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1-1
GSM900
Phase 1 EGSM900 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
270.833KHz
3.692us
270.833KHz
3.692us
270.833KHz
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~13dBm 33dBm~13dBm
Power Class 5pcl~15pcl 5pcl~19pcl 0pcl~15pcl
Sensitivity -102dBm -102dBm -100dBm
TDMA Mux 8 8 8
Cell Ridius 35Km 35Km 2Km
1. GSM General Specification

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SGH-E710 Specification
1-2
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2. GSM TX power class
TX Power
Control Level GSM900
533±2dBm
629±2dBm
727±2dBm
825±2dBm
923±2dBm
10 21±2dBm
11 19±2dBm
12 17±2dBm
13 15±2dBm
14 13±2dBm
15 11±2dBm
16 9±3dBm
17 7±3dBm
18 5±3dBm
19 3±3dBm
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

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2. SGH-E710 Flow Chart of Troubleshooting
2-1
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1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥100mA ?
Check the V bat. voltage
Down load again
Voltage ≥ 3.3V ?
Check the pin of U100
pin #11 ≥ 2.8V ?
Pin #9=1.8V?
Check the Initial operation
END
pin #39 and #33 = 2.8V
Charge the Battery
Check the clock generation
circuit (OSC400, U402 pin#4)
Check the clock signal
at pin #3 of OSC400
Freq.=13MHz,Vrms 300mV
Check U100 and C109
Check U100 and C110
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

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SGH-E710 Flow Chart of Troubleshooting and Circuit Diagrams
2-2
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2. System Initial
The pin #9 of U100 = 1.8V
and pin #11 of U100=2.8V?
Initial Failure
Is the pin #19 of U100
" Low --> High" ?
There is 32.768KHz wave
form at the C324, C325 ?
Is the pin #25 of U100
is High ?
The voltage is "High"
at the C106,C112,C113 ?
LCD Display OK ?
Sound operation OK ?
END
Check the U303
Check the U300
Check the U100
Check the LCD part
Check the Audio part
YES
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
NO
NO
YES
Check the U100
(If it has some problem,
it has to be replaced.)
Check the U100
(If it has some problem,
it has to be replaced.)

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SGH-E710 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 U100 ? Check the U303
"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 CN100 ? Check the U100

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SGH-E710 Flow Chart of Troubleshooting and Circuit Diagrams
2-4
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4. Charging Part
The pin #17,18 of CN101
(VEXT) is 5V ? Replace TA or check CN101
Abnormal charging operation
END
Check the U102
YES
NO
NO
The pin#2 of U102 is Low?
YES
The pin#3 of U102 is Low?
YES
Check the U102
NO
The pin#5 of U101 is
3.2~4.2V? Check the U101
NO
The ICHRG =1V(during charging)
&180mV(fullcharging)?
YES
YES
Solder again or change
R119
NO

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SGH-E710 Flow Chart of Troubleshooting and Circuit Diagrams
2-5
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100NF
C105
C103
470NF
VRF
10UF
10V
R120
47K,1%
Q102
DTC144EM
1
3
2
C116
100PF
C115
C107
10UF
10V
3K
2.2UF
C111
R121
12
VRTC
48
VSI
M
VLDO_1
11
VLDO_2
VLDO_3 39
37
VLDO_4
33
VLDO_5
VLDO_6 42
VLDO_7 40
30
VREF
34
VDD5
41
VDD67
VEXT
1
4
VIB_DRV
VL4S_A 36
35
VL4S_B
VL5S_A 32
31
VL5S_B
9
49
UP_CLK
53
52 UP_IO
54 UP_RST
3 VACC
2 VBAT
VDD12 10
38
VDD34
5
55 RING_PWM
RTC_ALMN
13
17 SCLK
15 SDI
16 SDO
50
SIM_CLK
SIM_IO
51
SIM_RST
14
LED1_DRV
78
LED2_DRV
20 PSW1_BUF
PWR_KEEP
21
46 PWR_SW1N
PWR_SW2
47
19
RESETN
RING_DR
V
62GN
D
GN
D
63
64GN
D
65GN
D
GN
D
66
GNDD
60
6
GNDD1
GNDQ
28
INTRQ
26
27
EN_5B
57 GND
67GN
D
GN
D
68
GND
58
59 GND
GN
D
61
56
43 BTEMP
CREF
29
CSN
18
EN_3
22
23
EN_4[0]
EN_4[1]
24
25
EN_5
EN_5A
U100
44 ADC_AUX1
ADC_AUX2
45
ADC_TRIG
1
3
2 Q100
C100
33PF
G
89
GG
10
VRTC VBAT
1
1
2 2
3
3
4 4
5
5
6 6
7
G
1.2K
CN100
VCCA
R115
VPAC
10K,1%
R118
C109
2.2UF
VCC B
2.2UF
C112
2.2UF
C106
DRIVE
6
GND
2
1 ISENSE
PRO G 43 VCC
5
VSENSE
U101
R11 0
390K
VRTC
10K,1%
R119
C102
33PF
2
NE
G
1
PO
S
M1
VCCDVCC_1.8A
R114
330K
C117
10UF
10V
VBAT
C104
100NF
1
4
U103
2
5
6
3
C108 C114
2.2UF
VOSC
470NF
C113
10UF
10V
C101
33PF
VBA T
C110
2.2UF
2
5
6
4
Q101
3
1
VREF
BACKLIGHT1
BACKLIGHT2
RST
RTCALAR M
PWR_KEEP
EN_VPAC
XOENA
UP_SDI
UP_SCLK
UP_CS
TA_VEXT
CHG_ON
SIMCLK
SIMRST
SIMDATA
KEY_ROW(0)
KEY_COL(2)
CHG_DET
PWR_ON
JIG_ON
EN_VRF
ICHRG
TA_VEXT
TA_VEXT

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SGH-E710 Flow Chart of Troubleshooting and Circuit Diagrams
2-6
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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 C237 is
2.2V±10%?
NO Solder the microphone again
or Replace
C230,C237,R217,R218,R219
Is microphone OK? NO Check U300
END
YES
YES

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SGH-E710 Flow Chart of Troubleshooting and Circuit Diagrams
2-7
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6. Speaker Part
Is the terminal of speaker
is O.K?
NO Replace the speaker
Are there any signal
at the pin #40,42 of CN200?
NO Check the LCD module
& Replace CN200
There is no sound from speaker
YES
YES
Thetypeofsoundfrom
the speaker is Melody?
YES NO
Are there any signal
at the pin #5,7 of U201?
Are there any signal
at the pin #3,9 of U201?
Check
U201,
U303
NO NO
Pin #4 of U201
is Low?
Pin #4 of U201
is High?
Check U202 Check U300
NO NO
YES YES
YES
YES
END