Samsung SGH-M2520L, GT-M2520L TSHOO

9. Flow Chart of Troubleshooting

9-1-1.

Power ON

Power On' does not work

'

Check the current consumption

Yes

Current consumption

Check the Vbat Voltage

Voltage

Check the pin of UCD3

Pin#M7

>= 100

Pin#A6
Pin#D6

in#L8

P

mA

Yes

>=3.3V

Yes

:1.8V
:2.9V

Yes

=2.9V

=1.8V

No

No

00

No

Check UCD300and

No

Check UCD300 and C301,C303

Download again

Charge the Battery

C343,

C344

Yes

Check the clock signal at pin#12of RFT100

Freq

Vrms

Vpp

Check the initial operation

≒

=26
>=300

1000

END

MHz

mV

mV

Yes

Yes

No

Check the clock generation circuit

relatedtoOSC

(

100,

Pin9,Pin10,

)

9-1

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

C

C

C

3

3

3

0

4

0

3

0

C302
C329

C

C

4

4

C326

3

2

3

5

C336

C

C

4

4

C342

3

3

2

6

C340
C339

C341

C

C304

3

3

C337

3

C335

C
3

3

8

C319

L301

T

-

D

E

-

E

-

1

6

1

F

G

0

0

C331

C332

1

1

3

3

D

C

U

C344

C
3

2

0

DCDC_OUT

VRF_2.9V

A

C

_

_

V

V

V

5

2

2

.

.

.

1

1

1

_

_

_

F

D

D

R

C

C

V

C

C

V

V

7

8

3

3

3

3

C

C

TH300

R300

R302

HI_MONO_OUT_N

HI_MONO_OUT_P
LO_MONO_OUT_N
LO_MONO_OUT_P

MAIN_MIC_IN_N
MAIN_MIC_IN_P

EAR_MIC_IN_N

EAR_MIC_IN_P

STEREO_OUT_L
STEREO_OUT_R

C323 C325C324

V

V

V

8

8

8

.

.

.

2

1

2

_

_

_

T

D

A

B

S

C

V

V

C
V

0

9

4

3

3

3

C

C

RADIO_L
RADIO_R

PWR_KEEP

JIG_ON

PWR_ON

V
9

.
2
_
D
C
C
V

1
4

3
C

EAR_ADC

ICHRG

C305

V
8

.
1
_

PAM_VRAMP

D
C
C
V

VLDO_COREA_S

3

2

4

4

3

3

C

C

R301

KEY_BL1
KEY_BL2

RXTX_DATA

RXTX_EN

RTX_I_N

RTX_I_P
RTX_Q_N
RTX_Q_P

TXPSTB

4
4
3
C

C306

G

-

A

X

C306

C

R

3

3

2

0

1

1

C304

A4
B4
B3
A2
B1
C1
C2
D1
D2

M3
M2
L3
L2

R13
R14
R12
P11

G13
J13
G12
G11
N15
L13

K15
K14
H11
J12
M14
M13

P6
E5
C4

F14

J5
H6
J6

D7
C7
D9

N2
R2
J4
J3
K3
K4

H5
L5

P13
P12
C10

A6
D6

E14
F12
D14

C15
B15
C12
D13

1

C

C303

3

2

8

O

C

S

3

2

C

7

3

0

C

0

3

1

5

C

C

C

3

3

3

1

0

0

0

9

8
C

C

C

3

3

3

2

2

2

5

4

3

C305

TH300

R300

R302

VCCD_2.9V VCCA_2.8V

C301

C300

0

5

4

2

5

1

7

1

2

1

1

1

1

1

1

N

K

M

L

P

N

D

C

N

1

0

6

7

8

8

9

9

4

1

6

1

1

F

F

F

F

F

K

K

K

K

E

N

5
K

0
1
F

4

8
L

P

1

6

1

G

F

VCCD_1.8V

UCD300

7

8

9

G

G

G

0
0
1

C
S
O

1

C115

C116

L110L115

C

C

C

1

1

1

4

3

3

7

8

3

C303C302

AX113E

B6

SIM_CLK

E6

SIM_IO

B5

SIM_RST

N5

SIM1_CLK

L6

SIM1_DATA

M6

SIM1_RST

E3
F3

F2

P1

CNTL_DAT_CSP

N9

CNTL_EN_CSP

D10

VBAT

G5
N7

AINT

B11
F1
L9

DINT

B12
B13

L301

D3
L10

PSW1_BUF

R3

RTC_CLK

P3

SCUSTB

C9
A12
F5
C5
N4
K7
E8
E9

MOTOR_EN

L7

VIB_RNG_EN

N6

CLK26M_ABB

R6

CLK_EN_ABB

R4

FLASH_RST

P5

RST

G4
G3

K13

VAMICREF

K10
K12
J11

C326

L14
F13
K11

C329

M10

UP_CS

P10

UP_SCLK

R10

UP_SDI

M9

UP_SDO

B10
C6
E13
E11
E2
A14

1
2

5

0

0

7

8

9

7

1

1

J

H

H

H

H

G

1

4

3

5

0

0

1

7

3

9

8

1

1

1

1

1

1

1

J

J

E

A

M

J

F

C

A

A

N

M

C335

GND_SW

C336

C110C111

7

B

6

2

F

1

0

T

0

L

1

0

6

C
1

4

2

VRF_2.9VVSYN_2.8V

C308 C310

C309

C315

DCDC_OUT

C319

GND_SW

VSIM_2.9V

C320

OSC300

VBAT

C331

C103

M

P

C100
R100
C109

R

C108

L

L

L

1

1

1

0

0

0

5

4

3

C117C118

R307

1

POS

BAT300

2

NEG

C321

C328C327

VBAT

C332

C333

GND_SW

VRF_2.9V

R100

VRF_2.9V

C111

26MHZ_BT

RTX_I_P
RTX_I_N

RTX_Q_P

RTX_Q_N

C103

C100

OSC100

2431

C101

C102

1

7

0

8

9

2

3

4

5

3

2

3

2

2

3

3

3

3

1
2
3
4
5

C110

6
7
8
9
10

RFT100

1

2

1

1

26
25

GSM850_LNA_IN_N

24

GSM850_LNA_IN_P

23

GSM900_LNA_IN_N

22

GSM900_LNA_IN_P

21
20

DCS_LNA_IN_N

19

DCS_LNA_IN_P

18

PCS_LNA_IN_N

17

SBLE
SBDT
SBCK
CLK26M_DBB

PCS_LNA_IN_P

6

5

4

3

1

1

1

1

C115

GSM_PAM_IN

DPCS_PAM_IN

VRF_1.5V

VRF_1.5V

C109C108

C116

9-2

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

9-1-2.

Initial

Initial Failure

Yes

The pin#A6 of UCD3

1.8V

the pin#D6 ofUCD3

2.9V ?

Is the pin#P5 of UCD300

Low→High"

"

There is

forms at the

32.768

and

C327

00 =

00 =

Yes

?

Yes

kHz wave

and

C328

No

No

No

if it has some problem, it is to be replaced.)

(

if it has some problem, it is to be replaced.)

(

Check the UCD300

Check the UCD300

Check the UCD300

Yes

The voltage is"High" at the

C301,C302,C303

Yes

LCD display is O.K

Yes

Sound is O.K

Yes

END

No

Check the UCD300

No

Check the LCD part

No

Check the Audio part

9-3

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

C

C

C
3

3

3

0

0

4
3

1

C305
R302

0

C

C303

3
2
8

O

C

S

3
2

C

7

3

0

C

0

3
1
5

C

C

C

3

3

3

0

0

1

8

9

0

C

C

C

3

3

3

2

2

2
5

4

3

TH300

R300

C302
C329

C

C

4

4

C326

2

3

5

3

C336

C

C

4

4

C342

3

3

2

6

C340
C339

C341

C

C304

3
3

C337

3

C335

C
3
3
8

C319

L301

1

F

6

-

T

D

G

-

-

3

1

E

E

1

1

X

-

A

G

0

3

0

C331

C332

U

C

D

C344

C306

C

R

C

3

3

3

0

2

2

1

0

1

VCCD_2.9V VCCA_2.8V

C300

DCDC_OUT

VRF_2.9V

A

C

_

_

V

V

V

5

2

2

.

.

.

1

1

1

_

_

_

F

D

D

R

C

C

V

C

C

V

V

TH300

R300

R302

HI_MONO_OUT_N

HI_MONO_OUT_P
LO_MONO_OUT_N
LO_MONO_OUT_P

MAIN_MIC_IN_N

MAIN_MIC_IN_P

EAR_MIC_IN_N
EAR_MIC_IN_P

RADIO_L
RADIO_R

STEREO_OUT_L

STEREO_OUT_R

PWR_KEEP

PWR_ON

C323 C325C324

V

V

V

8

8

8

.

.

.

2

1

2

_

_

_

T

D

A

B

S

C

V

V

C
V

JIG_ON

V

9

.

2

_
D
C
C
V

EAR_ADC

C305

V

8

.

1

_
D
C
C
V

ICHRG

R301

KEY_BL1
KEY_BL2

RXTX_DATA

RXTX_EN

RTX_I_N

RTX_I_P
RTX_Q_N
RTX_Q_P

PAM_VRAMP

TXPSTB

VLDO_COREA_S

7

9

0

8

3

3

3

3

3

3

C

C

C

2

4

3

1

4

4

4

4

4

3

3

3

3

3

C

C

C

C

C

C304

4

2

7

1

1

1

N

M

C

N

A4
B4
B3
A2
B1
C1
C2
D1

C306

D2

M3
M2
L3
L2

R13
R14
R12
P11

G13

J13
G12
G11
N15

L13

K15
K14
H11

J12
M14
M13

P6

E5

C4

F14

J5

H6

J6

D7

C7

D9

N2

R2

J4

J3

K3

K4

H5

L5

P13
P12
C10

A6

D6

E14

F12
D14

C15
B15
C12
D13

1

9

8

4

1

6

1

F

K

K

K

K

N

VCCD_1.8V

C301

0

5

5

1

2

5

1

1

1

1

K

K

L

P

N

D

0

0

9

7

8

6

1

1

F

F

F

F

F

E

C303C302

AX113E

4

8
L

P

UCD300

0

1

8

7

9

6

7

1

1

H

G

G

G

G

F

G

5

0

4

0

8
H

1

9

9

7

8

1

1

1

1

J

J

J

H

M

J

H

N

M

B6

SIM_CLK

E6

SIM_IO

B5

SIM_RST

N5

SIM1_CLK

L6

SIM1_DATA

M6

SIM1_RST

E3
F3

F2

P1

CNTL_DAT_CSP

N9

CNTL_EN_CSP

D10

VBAT

G5
N7

AINT

B11

F1
L9

DINT

B12
B13

L301

D3

L10

PSW1_BUF

R3

RTC_CLK

P3

SCUSTB

C9

A12

F5
C5
N4
K7
E8
E9

MOTOR_EN

L7

VIB_RNG_EN

N6

CLK26M_ABB

R6

CLK_EN_ABB

R4

FLASH_RST

P5

RST

G4
G3

K13

VAMICREF

K10
K12
J11

C326

L14
F13
K11

C329

M10

UP_CS

P10

UP_SCLK

R10

UP_SDI

M9

UP_SDO

B10

C6
E13
E11

E2
A14

1

2

C335

1

0

3

5

3

7

1

1

1

1

E

A

F

C

A

A

GND_SW

C336

VRF_2.9VVSYN_2.8V

C308 C310

C309

C315

DCDC_OUT

C319

GND_SW

VSIM_2.9V

C320

OSC300

VBAT

C331

R307

1

POS

BAT300

2

NEG

C321

C328C327

VBAT

C332

C333

GND_SW

9-4

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

9-1-3.

Sim Part

Insert SIM is displayed on the LCD

"

Yes

Check the SIM connector's

SIM

(

Check the voltage at pin#1

pin#2,#3,#4 of SIM

connection to

600)
SIM card

Yes

of SIM

600 >= 2.8V ?

Yes

Is there any signals

600 ?

No

No

No

Resolder or change SIM

Check the UCD300

Check the UCD3

600

00

Yes

Check the SIM Card

END

9-5

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

VSIM_2.9V

SIM_RST
SIM_CLK

C604

Flow Chart of Troubleshooting

C

C

SIM600

C302

615141

6
5
4

SIM_IO

12
11
10

13

C607

1
2
3

7
8

C605C603

9

C
4

2

5
C

4
3

6

C304
C337

C341

C329

C
4

C326

3

3

C336

C
4

C342

3

2

C340
C339

C
3

3

3

C335

C
3

3
8

C319

L301

1

F

-

D

G

T

0

1

6

0

C331

C332

1

1

3

E

-

E

-

U

C

D

3

C344

C
3
2

0

C

3

3

3

0

4

0

0

3

1

X

-

A

G

C

C303

3

2

8

O

C

S

3

2

C

7

3

0

C

0

3
1

5

C

C

C

3

3

3

1

0

0

0

9

8

C

C

C

3

3

3

2

2

2

3

4

5

C306

R

C

C305

3
0

1

TH300

3
2

1

R302

R300

7
3
3
C

C
_
V
2

.
1
_
D
C
C
V

VRF_2.9V

V
5

.
1

_
F
R
V

8
3
3
C

A
_
V
2

.
1
_
D
C
C
V

TH300

R300

R302

HI_MONO_OUT_N

HI_MONO_OUT_P
LO_MONO_OUT_N
LO_MONO_OUT_P

MAIN_MIC_IN_N
MAIN_MIC_IN_P

EAR_MIC_IN_N

EAR_MIC_IN_P

STEREO_OUT_L
STEREO_OUT_R

PWR_KEEP

C323 C325C324

V

V

V

8

8

8

.

.

.

2

1

2

_

_

_

T

D

A

B

S

C

V

V

C
V

0

9

1

4

3

4

3

3

3

C

C

C

RADIO_L

RADIO_R

JIG_ON

PWR_ON

V
9

.
2
_
D
C
C
V

DCDC_OUT

EAR_ADC

ICHRG

C305

RXTX_DATA

V
8

.
1
_

PAM_VRAMP

D
C
C
V

VLDO_COREA_S

2

3

4

4

3

3

C

C

R301

KEY_BL1
KEY_BL2

RXTX_EN

RTX_I_N

RTX_I_P
RTX_Q_N
RTX_Q_P

TXPSTB

4
4
3
C

C306

VCCD_2.9V VCCA_2.8V

C300

C304

2

4

7

1

1

1

N

M

N

C

A4
B4
B3
A2
B1
C1
C2
D1
D2

M3
M2
L3
L2

R13
R14
R12
P11

G13
J13
G12
G11
N15
L13

K15
K14
H11
J12
M14
M13

P6
E5
C4

F14

J5
H6
J6

D7
C7
D9

N2
R2
J4
J3
K3
K4

H5
L5

P13
P12
C10

A6
D6

E14
F12
D14

C15
B15
C12
D13

1

6

9

8

4

1

1

F

K

K

K

K

N

VCCD_1.8V

C301

0

5

5

1

2

5

1

1

1

1

K

K

P

L

N

D

0

0

9

8

7

6

1

1

F

F

F

F

F

E

C303C302

4

8
L

P

UCD300

0

1

9

6

7

7

8

8

9

1

1

H

H

H

G

G

G

G

F

G

AX113E

C308 C310

C315

C336

VRF_2.9VVSYN_2.8V

C309

DCDC_OUT

C319

GND_SW

C320

C331

VSIM_2.9V

OSC300

VBAT

C332

C321

VBAT

R307

1

POS

BAT300

2

NEG

C328C327

C333

GND_SW

B6

SIM_CLK

E6

SIM_IO

B5

SIM_RST

N5

SIM1_CLK

L6

SIM1_DATA

M6

SIM1_RST

E3
F3

F2

P1

CNTL_DAT_CSP

N9

CNTL_EN_CSP

D10

VBAT

G5
N7

AINT

B11

F1
L9

DINT

B12
B13

L301

D3
L10

PSW1_BUF

R3

RTC_CLK

P3

SCUSTB

C9
A12
F5
C5
N4
K7
E8
E9

MOTOR_EN

L7

VIB_RNG_EN

N6

CLK26M_ABB

R6

CLK_EN_ABB

R4

FLASH_RST

P5

RST

G4
G3

K13

VAMICREF

K10
K12
J11

C326

L14
F13
K11

C329

M10

UP_CS

P10

UP_SCLK

R10

UP_SDI

M9

UP_SDO

B10

C6
E13
E11
E2
A14

1
2

C335

5

4

0

7

8

1

J

J

H

1

0

3

5

0

1

7

3

9

1

1

1

1

1

1

1

J

E

A

M

J

F

N

C

A

A

M

GND_SW

9-6

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

9-1-4.

Microphone Part

Microphone does not work

Is the assembled status of

microphone O.K?

Check the reference voltage on mic path

Yes

No

Reassembled the microphone

Yes

Yes

On booting,

VAMICREF

On booting,

between MIC+

END

≒

2.5V ?

Yes

≒0.9

Yes

V?

No

No

Check UCD300 or R436

Resolder or change

L404,L405,C432,C433

①

②

9-7

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

MIC400

N

P

Flow Chart of Troubleshooting

C

R

2

2

1

1

9

0

C
1
3

0

B

3

1

S

-

3

R

0

K

Q

TA502

0

B

5

T

C

ZD505

R
6
1
4

ZD401 ZD402

C504

MIC400

9
0
4
C

NEAR MIC

1
0
4
D

1

Z

2
3

4

T
R
O
H
S

8
3
4
R

L404

L405

2
0
4
D
Z

NEAR BB

-

-

-

>

--->

C432

C433

R436

C436

C425

C
4
0
9

L
4

R
4

0

3
8

4

MAIN_MIC_IN_

MAIN_MIC_IN_

5

L
4
0
5

C
4

2

5
C

4

3

6

C
3

3

8

R436

C341

C304
C337
C335

C
4

3

3
C

4

3

2

C319

C302
C329
C326
C336
C342
C340
C339

C
3

3
3

L301

1

F

G

-

D

T

6

0

0

C331

C332

1

1

3

E

-

E

-

1

C

D

3

C344

G

-

A

X

U

C306

C

C

R

3

3

3

2

2

0

1

0

1

C
3

0

1

C
3

2

8
C

3

2

7
C

3

1

5

C305
R302

C

C

3

3

0

4

0

3

C303

O
S

C
3

0
0

C

C

C

3

3

3

1

0

0

0

9

8

C

C

C

3

3

3

2

2

2

3

4

5

TH300

R300

VCCD_2.9V VCCA_2.8V

C300

DCDC_OUT

VRF_2.9V

TH300

C

A

_

_

V

V

V

5

2

2

.

.

.

V

1

1

1

8

.

_

_

_

1

F

D

D

_

R

C

C

T

V

C

B

C

V

V

V

7

8

9

3

3

3

3

3

3

C

C

C

R300

R302

HI_MONO_OUT_N

HI_MONO_OUT_P
LO_MONO_OUT_N
LO_MONO_OUT_P

MAIN_MIC_IN_N
MAIN_MIC_IN_P

EAR_MIC_IN_N
EAR_MIC_IN_P

RADIO_L
RADIO_R

STEREO_OUT_L

STEREO_OUT_R

PWR_KEEP

PWR_ON

C323 C325C324

V

V

8

8

.

.

2

2

_

_

A

D

C

S
V

C
V

0

1

4

4

3

3

C

C

JIG_ON

V
9

.
2
_
D
C
C
V

EAR_ADC

ICHRG

C305

V
8

.
1
_
D
C
C
V

VLDO_COREA_S

2
4
3
C

KEY_BL1
KEY_BL2

RXTX_DATA

RXTX_EN

RTX_I_N

RTX_I_P
RTX_Q_N
RTX_Q_P

PAM_VRAMP

3
4
3
C

R301

TXPSTB

4
4
3
C

C304

5

4

2

7

1

1

1

1

N

M

D

C

N

A4
B4
B3
A2
B1
C1
C2
D1

C306

D2

M3
M2
L3
L2

R13
R14
R12
P11

G13
J13
G12
G11
N15
L13

K15
K14
H11
J12
M14
M13

P6
E5
C4

F14

J5

H6

J6

D7
C7
D9

N2
R2

J4

J3
K3
K4

H5
L5

P13
P12
C10

A6
D6

E14
F12
D14

C15
B15
C12
D13

1

0

6

8

9

4

1

1

1

F

K

K

K

K

N

E

VCCD_1.8V

C301

0

5

1

2

5

1

1

1

K

K

L

P

N

0

9

6

8

7

1

F

F

F

F

F

C303C302

4

8
L

P

UCD300

0

1
1
F

9

8

8

7

9

6

7

1

H

H

H

G

G

G

G

G

AX113E

C336

VRF_2.9VVSYN_2.8V

C308 C310

C309

C315

DCDC_OUT

C319

GND_SW

VSIM_2.9V

C320

OSC300

VBAT

C331

R307

1

POS

BAT300

2

NEG

C321

C328C327

VBAT

C332

C333

GND_SW

B6

SIM_CLK

E6

SIM_IO

B5

SIM_RST

N5

SIM1_CLK

L6

SIM1_DATA

M6

SIM1_RST

E3
F3

F2

P1

CNTL_DAT_CSP

N9

CNTL_EN_CSP

D10
G5
N7
B11
F1
L9
B12
B13
D3
L10
R3
P3
C9
A12
F5
C5
N4
K7
E8
E9
L7

N6
R6

R4
P5

G4
G3

K13
K10
K12
J11
L14
F13
K11

M10

P10
R10
M9

B10
C6
E13
E11
E2
A14

5

4

0

9

8

7

1

J

J

J

H

1

5

0

0

1

1
J

N

3

1

7

3

1

1

1

1

1

E

A

M

F

C

A

A

M

VBAT

AINT

DINT

L301

PSW1_BUF
RTC_CLK
SCUSTB

MOTOR_EN
VIB_RNG_EN

CLK26M_ABB
CLK_EN_ABB

FLASH_RST
RST

VAMICREF

C326

C329

UP_CS
UP_SCLK
UP_SDI
UP_SDO

1
2

C335

GND_SW

9-8

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

9-1-4.

EAR Microphone Part

Ear Microphone does not work

On booting,

EAR_MIC+

On booting,

MICBIAS_EAR_2.6V

On booting,

EARMIC_MIAS_EN

Check UCP200

≒

2.0V ?

No

≒2.6V?

No

≒2.9V?

No

Yes

Yes

Check R409,R430,R437

R422,R434

Yes

Is the status of C434 O.K?

No

Check C434

Is the signal of VBAT OK?

No

Check R427 and BTC500

Yes

Yes

Check UCD300

Check U404

EAR_MIC_IN_P

EAR_MIC_IN_N

F

6

0

C

C600

R430

C

6

6

0

0

1

6

C602

C218
R229
R228

R418

R
4

2

4

C
2

1

7

R227
R226

R
4

U402

3

3
R

4

2

9

6
0
4
C

C426

C429

C417

R
4

2

8
R
4

R

2

4

5

2

7

TA400

U
2

0
0

TA400

4
0
4
U

C434

R409
R437

C
4

2

8

ZD608

R218
R224

ZD607

C434
R402

C406

C429

C

C

4

4

2

1

6

7

MICBIAS_EAR_2.6V

7
3
4
R

9
0
4
R

C
3

0

3

2

U

3

4
R

3

1

5

C

L

3

3

0

3

2

0

R412

2
0
4
R

1

9

0

2

-

0

8

0

0

5

-

4

-

0

6

0

C

0

D

H

C615

EAR_MIC+

C427

C

C

4

4

L408

0

0

1

0

L407

0

8

-

5

4

1

2

0
6
F

9-9

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

C

N

C
1
3

1

-

3

R

0

K

3

Q

S

B

TA502

R
6
1
4

5

C

L

L

4

4

R

4

4

0

0
9

0

3

8

4

5

C

5

0

0

BATT_OPEN_CHECK

T

B

MIC400

ZD504

VBAT

ZD505

C504

ZD505

C504

ZD401 ZD402

TA502

BTC500

1
2
3
4
5
6
7

ZD400

R
4
2
2

R434

R431

C507

R430
C427

L

R432

5
0
0

R420

U

4

0

5

L505
C418

EAR_SW

VCCD_1.8V

4

U405

VCCD_1.8V

R432R431

5

1

3

2

R422

R434R420

0

0

4
D

Z

EAR_AD

EAR_KEY

MICBIAS_EAR_2.6V

C428

VBAT

U404

41

2

3

5

R427

EARMIC_BIAS_E

R428

9-10

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

9-1-5.

Receiver Part

There is no sound from the Receiver

Is the terminal of Receiver

Is there any signals at the

R400 and R401 of UCD3

2

O.K

END

C
3

3

0

U

3

4
R

3

1

5

C

L

3

3

0

3

2

0

R412

Yes

?

Yes

Yes

C218
R229
R228

R418

R
4

2

4

R
4

3

3
R

4

2

9

00?

C
2

1

7

R227
R226

U402

R
4

2

5

No

No

C

C600

6

0

6

2

9

R409
R437

4

0

4
U

ZD608

R218
R224

ZD607

C434
R402

C406

C429

C

C

C

4

4

4

2

2

1

8

6

7

U
2

0

0

TA400

R
4

2

8

R
4

2

7

Replace the Receiver

CheckUCD300,L407,L408

F

6

0

C
6

0

1

-

8

C602

1

0

-

0

4

0

-

0

0

0

0

C615

8

0

5

6

H

D

C

C

C
4

4

L408

0

0

0

1

L407

1

4

-

5

2

0

6

F

L407

LO_MONO_OUT_P

L408

C400

C401

RCV+

9-11

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

-VCRN_TUO_ONOM_OL