Samsung E715 Service Manual Trouble Shooting
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2. SGH-E715 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-E715 Flow Chart of Troubleshooting and Circuit Diagrams
2-2
This Document can not be used without Samsung's authorization
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-E715 Flow Chart of Troubleshooting and Circuit Diagrams
2-3
This Document can not be used without Samsung's authorization
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-E715 Flow Chart of Troubleshooting and Circuit Diagrams
2-4
This Document can not be used without Samsung's authorization
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-E715 Flow Chart of Troubleshooting and Circuit Diagrams
2-5
This Document can not be used without Samsung's authorization
100N F
C105
C103
470N F
VRF
10U F
10V
R120
47K,1%
Q102
DTC144EM
1
3
2
C116
100PF
C115
C107
10U F
10V
3K
2.2U F
C111
R121
12
VRTC
48
V
S
I
M
VLDO_1
11
VLDO_2
VLDO_3
39
37
VLDO_4
33
VLDO_5
VLDO_6
42
VLDO_7
40
30
V
R
E
F
34
VDD5
41
VDD67
VEXT
1
4
V
I
B
_
D
R
V
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
VBA T
VDD12
10
38
VDD34
5
55
RING_PW M
RTC_ALM N
13
17
SCLK
15
SDI
16
SDO
50
S
I
M
_
C
L
K
S
I
M
_
I
O
51
S
I
M
_
R
S
T
14
L
E
D
1
_
D
R
V
78
L
E
D
2
_
D
R
V
20
PSW1_BUF
PWR_KEEP
21
46
PWR_SW1N
PWR_SW 2
47
19
RESETN
R
I
N
G
_
D
R
V
6
2
G
N
D
G
N
D
6
3
6
4
G
N
D
6
5
G
N
D
G
N
D
6
6
GNDD
60
6
G
N
D
D
1
G
N
D
Q
28
INTRQ
26
27
EN_5B
57
GN D
6
7
G
N
D
G
N
D
6
8
GN D
58
59
GN D
G
N
D
6
1
56
43
BTEM P
C
R
E
F
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
VCC A
R115
VPAC
10K,1%
R118
C109
2.2UF
VCC B
2.2U F
C112
2.2U F
C106
DRIVE
6
GND
2
1
ISENSE
PRO G
4 3
VCC
5
VSENSE
U101
R11 0
390K
VRTC
10K,1%
R119
C102
33PF
2
N
E
G
1
P
O
S
M1
VCC D VCC_1.8A
R114
330K
C117
10UF
10V
VBAT
C104
100NF
1
4
U103
2
5
6
3
C108
C114
2.2U F
VOSC
470NF
C113
10U F
10V
C101
33PF
VBA T
C110
2.2U F
2
5
6
4
Q101
3
1
VREF
BACKLIGHT1
BACKLIGHT2
RST
RTCALAR M
PWR_KEEP
EN_VPAC
XOEN A
UP_SDI
UP_SCLK
UP_CS
TA_VEXT
CHG_O N
SIMCLK
SIMRST
SIMDATA
KEY_ROW(0)
KEY_COL(2)
CHG_DET
PWR_O N
JIG_ON
EN_VRF
ICHRG
TA_VEXT
TA_VEXT
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