Samsung GT-S5150 Troubleshooting

9. Flow C hart of Troubleshooting

9-1.

9-1-1.

BASEBAND

Power On

Power On'does not work

'

Check the Voltage of Battery

more than

Check the current consumption

more than

Voltage of TA500=VBAT

Check the VCCD_1.8V,

VCCD_2.9V and

VCCD_1.2V_A of UCD200

Yes

No

Yes

Yes

3.3V

100

mA

Yes

No

No

?

No

Change the Battery

Download again

Check the related circuit

Check the related circuit

Yes

Check VRF_2.9V of RFT100

Yes

Check CLK26M_DBB on C117

Freq

Check the initial operation

=26

END

MHz

Yes

Yes

No

Check the UCD300 and C312, C313,

C103, C104, C105, C107

No

Check OSC100 and RFT100

9-1

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Flow Chart of Troubleshooting

9-2

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9-3

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9-4

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9-5

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Flow Chart of Troubleshooting

VRF_2.9V

C116

RTX_I_P

RTX_I_N
RTX_Q_P
RTX_Q_N

C115

GSM850_LNA_IN_P

GSM900_LNA_IN_P

DCS_LNA_IN_P

PCS_LNA_IN_P
GSM850_LNA_IN_N
GSM900_LNA_IN_N

DCS_LNA_IN_N

PCS_LNA_IN_N

VCCD_2.9V

L101

C106

A1
B2
B1
C2

E5
F5
G5

E2
E3
E4

A7
B7
E7
F7
A6
C7
D7
G7

1
C

IG
D

A

D
D

AX

V

B
BX

FE1
FE2
FE3

FSYS2
FSYS3
FSYSEN

RX1
RX2
RX3
RX4
RX1X
RX2X
RX3X
RX4X

D
N
G

6
B

4

6

3
F

D

G

2

L
L

S

P

M

D

D

D

D

V

V

RFT100

D

D

N

N

G

G

4

4

1

C

D

D

VRF_2.9V

5

1

5

3

F

C

A

B

X

X
R
D
D
V

D
N
G

O

G

T

C

E

D

V

R

D

D

X

V

D

R

V

T
D
D
V

XOMODE

CTRLCLK

CTRLDA
CTRLEN

SYSCLK

SYSCLKEN

REFR

REGC

VBIAS

D

D

D

N

N

N

G

G

G

5

6

2

6

F

F

E

D

O
X
D
D
V

TX1
TX2

XT
XO

NC
NC

D
N
G

A3
A2

G1
G2
F4

D2
D3
C3

E1
G3
A4
C6
G6

1
2

C107

C117

TP_SBDT

C120

C103

GSM_PAM_IN
DPCS_PAM_IN

SBCK

SBDT26MHZ_BT
SBLE

R108

C104

OSC100

2

CLK26M_DBB

VRF_2.9V

C105

1

43

9-6

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Flow Chart of Troubleshooting

9-1-2.

Initial

Initial Failure

Yes

RST

check the R222)

(

="H

END

igh

Yes

"?

No

Check the circuit related to reset

9-7

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Flow Chart of Troubleshooting

9-8

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R222

R223

NTSRTTSR

9-9

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9-10

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9-1-3.

Charging Part

Abnormal charging part

Check the Voltage Of L300.

Check the U300 pin

under

under

5.0V?

0.4

Yes

Yes

V?

Yes

No

4.

No

Check the circuit related to

VUSB_OUT_5V

Check the circuit related

Check the R306

R303

&

=4.3

Replace U300

END

=16

Kohm?

Yes

Kohm?

No

Replace R306, R303

9-11

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9-12

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9-13

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9-1-4.

Sim Part

Phone can't access SIM Card

Check the VSIM_2.9V of SIM500

Check the circuit around SIM500

Yes

2.9V ?

C504, C507)

(

Yes

input circuitry

Yes

END

No

Check the circuit related

No

Check the related circuit of SIM500

9-14

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Flow Chart of Troubleshooting

9-15

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9-1-5.

Microphone Part

Microphone does not work

Yes

Check the connection

from MIC

Yes

Check the circuit

from UCD3

VAMICREF

00 to

Yes

On booting,

≒

2.5V ?

MIC

No

No

No

Resolder MIC

Check the path from Main IC to MIC

Check UCD300

Yes

Check the MIC

Yes

END

No

Replace the MIC

9-16

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9-17

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9-18

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9-1-6.

Receiver Part

There is no sound from the Receiver

Is the terminal of Receiver

Is there any signals at the

C400 and C401 of UCD3

O.K

END

Yes

?

Yes

Yes

00?

No

Replace the Receiver

No

CheckUCD300,C400, C401

9-19

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9-20

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9-1-7.

Speaker Part

Speaker does not work

Is the terminal of speake

SPK+&SPK

OK?

Check the

HIGH"

"

Yes

Yes

r

-

No

check the speaker

No

Resolder SPK+(L401)

SPK-(L402)

Check HI_MONO_OUT_P,N check the element related

Yes

Change speaker

Is it works?

Yes

END

No

No

Resolder of replace U400

9-21

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Flow Chart of Troubleshooting

9-22

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9-1-8.

Camera part

Camera" function does not work

"

Is the Camera connected

Is the Camera working?

CAM_2.8V_A

Check C113, C100)

(

CAM_2.8V

with SUB PBA

Yes

Yes

=2.8

Check C101)

(

CAM_1.8V

Check C102)

(

Yes

=2.8

=1.8?

V?

V?

No

No

No

Reconnect the camera module

Change the camera module

Change SUB PBA

Yes

Reconnect Main Connector

HEA600

Yes

END

9-23

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Flow Chart of Troubleshooting

9-24

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9-25

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9-1-9.

Radio part

Radio does not work

check VCCD_1.8V on

check VCCD_2.9V on

Resolder the U401

Yes

R502, R503

L405, C425

Is it

Is it

1.8

2.9

V?

Yes

V?

Yes

Resolder or Replace R502, R503

No

Resolder L405, C425

END

9-26

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9-27

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9-2.

9-2-1.

RF

EGSM RX

NORMAL CONDITION

catch the channel?

YES

FEM100CHECK

pin

11≥-65

FEM100CHECK

pin

3, 4≥-65

RFT100 CHECK

C114, C119

dBm

dBm

YES

-65

≥

YES

YES

dBm

NO

L150, L100, C101, L102, C100, R100, L106

NO

?

NO

?

NO

?

FEM1

resolder or change

resolder or change

resolder or change

00,

FEM1

RFT100

RFS

CHECK soldered

100

00

CONTINUOUS RX ON

RF INPUT

AMP

:-50

:62

dBm

CH

RFT100

VCCD_2.9V, VRF_2.9V

2.9V ?

YES

OSC100 CHECK

pin

1, 3

freq

MHz

:26
: 380

O.K?

END

mV?

YES

YES

?

Vp-p

GSM Receiver is

NO

:

NO

NO

CHECK soldered C106, C101, C107, C103, C104, C105

OSC

change or resolder

100

GSM RX path component

resolder or change

or

Change MAIN PBA

9-28

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Flow Chart of Troubleshooting

9-2-2.

DCS RX

NORMAL CONDITION

catch the channel?

YES

FEM100CHECK

pin

11≥-65

FEM100CHECK

pin

5, 6≥-65

RFT100 CHECK

L112, L115

VCCD_2.9V, VRF_2.9V

≥

RFT100

2.9V ?

dBm

dBm

YES

-65

YES

YES

dBm

NO

L150, L100, C101, L102, C100, R100, L106

NO

?

NO

?

NO

?

NO

:

FEM1

resolder or change

resolder or change

resolder or change

CHECK soldered C106, C101, C107, C103, C104, C105

00,

FEM1

RFT100

RFS

CHECK soldered

100

00

Change MAIN PBA

CONTINUOUS RX ON

RF INPUT

AMP

or

:-50

: 698

dBm

CH

YES

OSC100 CHECK

pin

1, 3

freq

MHz

:26

: 380

O.K?

END

mV?

YES

YES

?

Vp-p

GSM Receiver is

NO

change or resolder

NO

OSC

100

DCS RX path component

resolder or change

9-29

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Flow Chart of Troubleshooting

9-2-3. P

CS RX

NORMAL CONDITION

catch the channel?

YES

FEM100CHECK

pin

11≥-65

FEM100CHECK

pin

7, 8≥-65

RFT100 CHECK

L116, L119

dBm

dBm

YES

-65

≥

YES

YES

dBm

NO

L150, L100, C101, L102, C100, R100, L106

NO

?

NO

?

NO

?

FEM1

resolder or change

resolder or change

resolder or change

00,

FEM1

RFT100

RFS

CHECK soldered

100

00

CONTINUOUS RX ON

RF INPUT

AMP

:-50

: 661

dBm

CH

RFT100

VCCD_2.9V, VRF_2.9V

2.9V ?

YES

OSC100 CHECK

pin

1, 3

freq

MHz

:26
: 380

O.K?

END

mV?

YES

YES

?

Vp-p

GSM Receiver is

NO

:

NO

NO

CHECK soldered C106, C101, C107, C103, C104, C105

OSC

change or resolder

100

PCS RX path component

resolder or change

or

Change MAIN PBA

9-30

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Flow Chart of Troubleshooting

9-2-4.

EGSM TX

FEM100 pin

11

about

dBm?

2~3

YES

RFS

L150,L100,C101,

100,

L102,C100,R100,L106

check&change

NO

:

PAM

pin

17,18 : 3.3~4.

V?

2

PAM

pin

3 : 1.2V ?

FEM100pin

about

:-5

PAM

pin

2:2.8

100

100

100

YES

YES

dBm

YES

NO

11

?

V?

NO

NO

NO

PAM

pin

2:2.8

check&change

100

V?

YES

BATTERY

Check R107

NO

CD300

U

check&change

CONTINOUS TX ON CONDITION

TX POWER DAC:

REF LEV.

RBW
VBW
SPAN

ATT.

CH

600

:62
: 100
:100

:10

:20

CODE APPLIED

KHz
KHz

MHz

dBm

:10

dB

CD300

U
C106,L101,C107
C103,C104,C105

,

change orresolder

YES

PAM

100

change or resolder

NO

CP200

U

check

RFT100

VCCD_2.9V, VRF_2.9V

:2.9V?

YES

pin

Vp-p

change or resolder

OSC100

1,3 : 26

:380

RFT100

Is it work?

END

MHz

YES

YES

mV?

NO

?

OSC

change or resolder

NO

UCD300

change or resolder

100

9-31

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Flow Chart of Troubleshooting

9-2-5.

DCS TX

FEM100 pin

about

RFS

L150,L100,C101,

100,

L102,C100,R100,L106

check&change

NO

2~3

YES

11

dBm?

pin

:

PAM

100

17,18 : 3.3~4.

V?

2

PAM

pin

3 : 1.2V ?

FEM100pin

about

:-5

PAM

pin

2:2.8

100

100

YES

YES

dBm

YES

NO

11

?

V?

NO

NO

NO

PAM

100

pin

2:2.8

YES

BATTERY

check&change

Check R107

V?

NO

CD300

U

check&change

CONTINOUS TX ON CONDITION

TX POWER DAC:

CH
RBW
VBW
SPAN

REF LEV.

ATT.

CODE APPLIED

520

:

698

KHz

: 100

KHz

:100

MHz

:10

dBm

:10

dB

:20

CD300

U
C106,L101,C107
C103,C104,C105

,

change orresolder

YES

PAM

100

change or resolder

NO

CP200

U

check

RFT100

VCCD_2.9V, VRF_2.9V

:2.9V?

YES

pin

Vp-p

change or resolder

OSC100

1,3 : 26

:380

RFT100

Is it work?

END

MHz

YES

YES

mV?

?

NO

OSC

change or resolder

NO

UCD300

change or resolder

100

9-32

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Flow Chart of Troubleshooting

9-2-6. P

CS TX

FEM100 pin

about

RFS

L150,L100,C101,

100,

L102,C100,R100,L106

check&change

NO

2~3

YES

11

dBm?

pin

:

PAM

100

17,18 : 3.3~4.

V?

2

PAM

pin

3 : 1.2V ?

FEM100pin

about

:-5

PAM

pin

2:2.8

100

100

YES

YES

dBm

YES

NO

11

?

V?

NO

NO

NO

PAM

100

pin

2:2.8

YES

BATTERY

check&change

Check R107

V?

NO

CD300

U

check&change

CONTINOUS TX ON CONDITION

TX POWER DAC:

REF LEV.

RBW
VBW
SPAN

ATT.

520

CH

:
: 100
:100

:10

:20

CODE APPLIED

661

KHz
KHz

MHz

dBm

:10

dB

CD300

U
C106,L101,C107
C103,C104,C105

,

change orresolder

YES

PAM

100

change or resolder

NO

CP200

U

check

RFT100

VCCD_2.9V, VRF_2.9V

:2.9V?

YES

pin

Vp-p

change or resolder

OSC100

1,3 : 26

:380

RFT100

Is it work?

END

MHz

YES

YES

mV?

?

NO

OSC

change or resolder

NO

UCD300

change or resolder

100

9-33

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9-34

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VRF_2.9V

C116

RTX_I_P

RTX_I_N
RTX_Q_P
RTX_Q_N

GSM850_LNA_IN_P

GSM900_LNA_IN_P

DCS_LNA_IN_P

PCS_LNA_IN_P
GSM850_LNA_IN_N
GSM900_LNA_IN_N

DCS_LNA_IN_N

PCS_LNA_IN_N

C115

VCCD_2.9V

C106

A1
B2
B1
C2

E5
F5
G5

E2
E3
E4

A7
B7
E7
F7
A6
C7
D7
G7

L101

A
AX
B
BX

FE1
FE2
FE3

FSYS2
FSYS3
FSYSEN

RX1
RX2
RX3
RX4
RX1X
RX2X
RX3X
RX4X

1
C

6
B

4
G

G
I

D
D
D
V

D
N
G

4
C

6

3
F

D

2

L
L

S

P

M

D

D

D

D

V

V

RFT100

D

D

N

N

G

G

4

1
D

D

VRF_2.9V

5

5

3

C

A

B

X

X

G

O

T

R

E

C

D

D

R

V

D

X

D

D

V

V

R

D

T

V
D
D
V

XOMODE

CTRLCLK

CTRLDA

CTRLEN

SYSCLK

SYSCLKEN

REFR

REGC

VBIAS

D

D

D

D

N

N

N

N

G

G

G

G

5

6

2
F

E

D

C107

C103

1
F

O
X
D
D

A3

V

TX1

A2

TX2

G1

XT

G2

XO

F4

D2
D3
C3

TP_SBDT

C117

E1
G3
A4
C6
G6

1

NC

2

NC

D
N
G

6
F

C120

GSM_PAM_IN
DPCS_PAM_IN

SBCK

SBDT26MHZ_BT
SBLE

R108

C104

2

CLK26M_DBB

VRF_2.9V

C105

OSC100

1

43

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Flow Chart of Troubleshooting

9-2-7.

Bluetooth part

Bluetooth connection disable

Check BT function ON

Check power of U100,

VBT_1.8V

VBT_1.5V

Check pin A3 of

(26

≒

≒

MHz)

Yes

1.8

1.5

Yes

Yes

V,
V?

U100

No

Enable BT function

No

Resolder U100

No

Resolder C115

Yes

Check the assembled

status of F100, L120, L121,

C136, C130, C131, C134

Yes

Check the assembled status

of ANT101

Yes

END

No

No

Resolder error parts

Resolder ANT101

9-36

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9-37

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VRF_2.9V

C116

RTX_I_P

RTX_I_N
RTX_Q_P
RTX_Q_N

GSM850_LNA_IN_P

GSM900_LNA_IN_P

DCS_LNA_IN_P

PCS_LNA_IN_P
GSM850_LNA_IN_N
GSM900_LNA_IN_N

DCS_LNA_IN_N

PCS_LNA_IN_N

C115

VCCD_2.9V

C106

A1
B2
B1
C2

E5

F5

G5

E2
E3
E4

A7
B7
E7

F7
A6
C7
D7

G7

L101

A
AX
B
BX

FE1
FE2
FE3

FSYS2
FSYS3
FSYSEN

RX1
RX2
RX3
RX4
RX1X
RX2X
RX3X
RX4X

1
C

G

I
D
D
D
V

D
N
G

6
B

4

3
F

G

2

L

S

L
P

M

D

D

D

D

V

V

RFT100

D

D
N

N

G

G

4

1

C

D

VRF_2.9V

6

5

3

C

D

B

X

X

G

T

R

E

D

D

R

D

X

D

V

V

R
T
D
D
V

XOMODE

CTRLCLK

CTRLDA
CTRLEN

SYSCLK

SYSCLKEN

D

D

D

N

N

N

G

G

G

5

4

6
E

D

D

5
A

O
C
V
D
D
V

REFR

REGC

VBIAS

D
N
G

2
F

C107

1
F

O
X
D
D

A3

V

TX1

A2

TX2

G1

XT

G2

XO

F4

D2
D3
C3

E1
G3
A4
C6
G6

1

NC

2

NC

D
N
G

6
F

TP_SBDT

C117

C120

C103

GSM_PAM_IN
DPCS_PAM_IN

SBCK

R108

SBDT26MHZ_BT
SBLE

C104

CLK26M_DBB

VRF_2.9V

C105

OSC100

2

1

43

9-38

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This Document can not be used without Samsung's authorization

Block Diagrams

7.

7-1.

Block Diagram

7-1

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This Document can not be used without Samsung's authorization

Block Diagrams

7-2.

RF Blcok Diagram

7-2

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Block Diagrams

7-3.

Audio Block Diagram

7-3

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

PCB Diagrams

8.

Main top view]

[

8-1

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

PCB Diagrams

Main Bottom view]

[

8-2

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization