Samsung SGH-I700 Troubleshooting

2. SGH-i700 Flow Chart of Troubleshooting

1.Power On

'POWER ON' does not work

Yes

Check the current

consumption more than

20mA

Yes

Check the pin 1 of

U316 or U 317 is Hi gh

Yes

Check the pin 1 of

U323 is High

Yes

Check the VB at more

than 3.6V

Yes

Check the pin

4ofU308ismorethan

3.3V

Yes

No

No

No

No

No

Press nPower Key or Hardware

Reset

Charge the Battery

Charge the Battery

Charge the Battery

Check to the path from pin 1 of

CN301 to pin 1, 2 of U307

Check the pin

5ofU311ismorethan

1.0V

Yes

Checktheclocksignal

at OSC101 and OSC102

Yes

Check the initial operation

END

No

No

Check the pin 1 of U311 is High

Retry Hardware Reset

2-1

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SGH-I700 Flow Chart of Troubleshooting

T
E
D
V
2
3
n

7

K

5

0

3

1

R

5

4

3

C

6

K

5

0

3

0
1

R

T
A
B
V

L

I
A
F
_
R
E

W
O
P
n

8
0
3
U

4
3
3
R

3

K

3

0

3

2
2

R

6

1
C

7

,

0

1

3

R

U

2
R

1

2
3

K

3

2
2

R

T
A
B
V

D

N

N

7

G

1
3
U

T

D

U

D

O

V

2

1

5

F

5
3

N

C

1

8

D
N

G

N
E

1

C
N

5

F
F
O

/
N
O

1

­1
C

.
V

2

7

6

5

D

D

D

N

N

N

G

G

G

T

G

U

L

N

O

F

I

2

4

3

5

K

3

0

3

0
1

R

U
P
C
_
C
C
V

4

1
R

,
N

I
V

2

­1
C

.
V

3

L

I
A
F
_
R
E

W
O
P
n

9

F

2

V

3

6

U

1

1

C

F

1

N

3

0

3

0
1

C

0

F

V

3

U

3

3

.

3

C

6

3

T
E
D
V
4
3
n

4

K

0

0

3

1

R

5

3

4

C

2

K

0

0

3

0
1

R

T
A
B
V

D

N

N

3
2

G

3
U

T

D

U

D
V

O

2

1

2

F

2
3

N
1

C

L

I
A
F
_
R
E

W
O
P
n

4

0

F

V

4

U

3

3

.

3
1
E
R
O
C

6

F

3

V

U

3

0

0

C

1

1

U
P
C
_
C
C
V

7

8

6

F

E

P

D

L

O

L
L

M

1

/

P

1

S

3
U

N

H

U

T

R

I

1

2

3

3

6

3

C

9

F

3

V

U

3

0

0

1

1

C

H
u
0
1

5
0
3
L

5

N

W

I

S

V

D

B

N

F
V

G

4

F

K
0

P

9

0

3

2

8

5

4

4

3

3

R

C

9

K

4

0

3

7
4

R

F

1
4

P

3

0
2

C

2

F

6

N

4

0

3

0
1

C

3
3
T
A
B

C

5

C

5

V

1
3
U

1

1

K

5

0

3

0
1

R

T
A
B
V

K

5

0

3

0
1

R

4

Y

D
N
G

B

A

2

3

K

5

0

3

1
5

R

3

4

C

D

N

N
G

6
1
3
U

T

D

U

D
V

O

1

2

3
5

F

3

N

C

1

N
E
_
R
W
P

2-2

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2. Initial part

SGH-I700 Flow Chart of Troubleshooting

Initial Failure

Yes

Check the "nRE SET_IN"

signal at the pin 2 of

U109 is "High"

Yes

Check the

"nGPIO_RESET" at the

pin 1 of Q101 is "High"

Yes

Check the

"SOFTWARE_RESET" at

the in 1 of Q101 is

"High"

Yes

Check the connections and initialization

using Factory Test Program

Yes

No

No

No

Check the U110

Check the R125

Download again

Check LCD connector CN503,

and resolder bridge

T
E
S
E
R
_
O

I
P
G
n

3
D

5

K

2

0

1

U

0
1

R

P
C
_
C
C
V

Yes

END

T
E
D
V
2
3
n

1

5

G

2

­5
0
1
Q

F

2

N

7

0

1

0
1

C

0
1

W
S

4
S

2

4

1

3

3

1

1
0
1
Q

2

T
E
S
E
R
_
E
R
A

W
T
F
O
S

U
P
C
_
C
C
V

2-3

N
I
_

T
E
S
E
R
n

2
0
1
Q

S

D

2

2

T
E
S
E
R

1

D

9

N

0

G

1
U

C
C
V

3

U
P
C
_
C
C
V

F

1

N

4

0

1

0

C

1

3

1

G

F

3

N

4

0

1

0

C

1

4

Y

C

5

D

3

C

N

0

V
1
1

U

G

U

B

F

A

2

2

1

3
S
7
C
T

T

R

E

E

S

W

E

O

R

P

_

n
O
I

P
G
n

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This Document can not be used without Samsung's authorization

SGH-I700 Flow Chart of Troubleshooting

3. Charge Part

Abnormal charging part

Yes

Check the pi n 16 of

CN605 ≒ 4.2V

Yes

Check the pin 1 of

CN301 ≒ 4.2V

Yes

Charging

Yes

END

No

No

Replace TC

Check to the path from CN605 to

pin 1 of CN301

2-4

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4. SIM Part

SGH-I700 Flow Chart of Troubleshooting

Phone can't access SIM card

Yes

Check the pin 1 of

CN701. voltage is 2.8V

?

Yes

Check the SIM

connector's CN701

Connection to SIM card

Yes

Check the circuit around U701

(Serial EEPROM) and data stored in it

Yes

END

No

Check the circuit related to CN701

No

Resolder CN701

2-5

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SGH-I700 Flow Chart of Troubleshooting

C 703

2.2U F 100N F

C 70 2

SIMRS T
SIMCLK

SIMDATA

C 70 6
33P F

SIM_RST
SIM_CLK

C 70 5
33P F

VBAT

1

1

2

2

3

3

G

54

UP_RST

53

UP_CLK

52

UP_IO

44

ADC_AUX1

45

ADC_AUX2

56

ADC_TRIG

3

VACC

2

VBAT

1

VEXT

43

BTEMP

46

PW R _SW 1N

47

PW R _SW 2

13

RTC_ALM N

21

PW R _KEEP

20

PSW 1_BUF

14

INTRQ

15

SDI

16

SDO

17

SCLK

18

CSN

22

EN _3

23

EN _4[0]

24

EN _4[1]

25

EN _5

26

EN _5A

27

EN _5B

55

RING_PW M

57

GND

58

GND

59

GND

60

GND D

CN 701

G G

9 10

D
N
G

2

1

6

6

6
5

4

G

8

7

49

D

D

N

N

G

G

3
6

6

5
4

51

50

K

S

T

L

R

C

_

_

M

M

I

I

S

S

D
N
G

5

4
6

C 70 1
33P F

29

30

48

F

F
O
I

E

E

I

M

_

R

R

S

M

V

V

C

I
S

U 701

V

V

V

R

R

R

V

D

D

D

R

_

_

_

D

1

2
G

_

D

D
N

B

I

I

E

E

V

R

L

L

78

4

28

SIM_IO

C 704

100N F

Q
D
N
G

5
6

6

1
D
D
N
G

D
N
G

6
6

R 708

VLD O _7

VDD67

VLD O _6

VL5S _A
VL5S _B

VLD O _5

VL4S _A

VL4S _B

VLD O _4

VDD34

VLD O _3

VLD O _2

RESETN

VLD O _1

VDD12

D

D

N

N

G

G

7
6

0

VDD 5

VRTC

8
6

VCCA

VCCB

VREF

VBAT

VOSC

40

41

42

32

31

33

34

36
35

37

38

39

12

11

19

9

10

D
N
G

VBAT

C 724

1U F

C 712

2.2U F

VC C _1.8A

C 719

470N F

AGN D

R 701

0

C 717

VCCD

R712

0

C 720

470N F

R705

0

C 71 8

1U F

VRT C

BATT_BACKUP+

R 719

1.2K

C715

100PF 1U F

VRF

C 725

1U F

VPAC

C71 1

470N F

C 716
10N F

R 703

10

RST

POW E R

2-6

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