Samsung SGH-E2120, GT-E2120 TSHOO

9. Flow Chart of Troubleshooting

Power On

9-1.

OWER ON' does not work

'P

Yes

Check battery voltage

is higher than

Check VPERM_3.0V,

VANA_2.85V, VRF_2.85V,

VSIM_3.0V, VMEM_1.8V,

VGPIO_2.8V of UCP201

Check the pin1of

OSC201 produces clock

signal

Check the L118

concerning about Jig

Power on

3.3V

OK

OK

OK

Not OK

NotOK

Not OK

Not OK

Change battery

Check the UCP201

older OSC201 again

S

older L118 again

S

OK

No

Is Power On working?

Yes

END

Repeat sequence

9-1

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

UCP201

PCM_CLK

PCM_DO

PCM_SYNC

PMU_VIO

PMU_VANA

PMU_VMEM

PMU_VPERM

PMU_VRF

PMU_VSIM

POK_OUT

PWM_OUT0

PWM_OUT1

PWM_OUT2

UART0_RD

UART0_TD

UART1_RD

UART1_TD

UART1_CTS

UART1_RTS

XTAL_26M_1

XTAL_26M_2

XTAL_32K_1

XTAL_32K_2

XTAL_SHLD

XTAL_SHLD

XTAL_SHLD

XTAL_SHLD

XTAL_SHLD

XTAL_SHLD

SIM_CLK

SIM_DATA

SIM_RST

PCM_DI

POK_IN

RFID_N

RFID_P

RFIL_N

RFIL_P

RFIP_N

RFIP_P

J19

H15

H16

J18

W15

W14

V15

L201

W12

W13

V14

T8

V8

T7

T5

T6

W8

ICHGN

W9

ICHGP

E1

D1

G1

F1

C1

B1

A1

RFOH

A2

RFOL

L18

K18

W5

V5

V7

W6

A7

A6

L19

K19

B8

A8

B6

A5

B7

B5

H19

H18

G16

DCL
DU
DD
FSC

VGPIO_2.8V
VANA_2.85V

VMEM_1.8V
VPERM_3.0V
VRF_2.85V
VSIM_3.0V

ONKEY_2

ONKEY_1

ICHGN
ICHGP

DCSRX_N
DCSRX_P
EGSMRX_N
EGSMRX_P

DCS_TX
EGSM_TX

UART0_TD
UART0_RD

UART1_RD
UART1_TD

OSC200

2

OSC201

1

3

2

SIM_CLK
SIM_DATA
SIM_RST

3

4

1

IFC100

HY20-AB0310

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

13

13

14

14

15

15

16

16

17

17

18

18

19

19

20

20

21

NC

22

NC

23

NC

24

NC

25

NC

26

NC

27

NC

VBAT

VCHG_5V

EAR_SW_REF

C133

C136

C138

L111
L113

R122

L115
L116

R123

L117

JIG_ON_IF

L118

R125
R126

R129

TA_DETECT

6

5

4

2

ZD104

1005

R120

6

5

3

1

R_ANT

EAR_N
VCM_OUT
EAR_P

EAR_SW

AUX_DET
UART0_TD

UART0_RD

JIG_ON

C147

C150

C149

4

3

1

2

ZD105

C148

VDD_3.3V

R124

0
0
1
Q

R117

C134

C132

EAR_MIC_P

C135

C137

R119

2

S

G
1

3

D

C139

USB_EN

USB_DP
USB_DM

EAR_MIC_N

R128

9-2

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

BAT200

R
2
0
4

C
2
2
3

Flow Chart of Troubleshooting

0

C

R

1

1

C

5

2

3

0

3
1
6

U304

R
2
0

C317

1

C229

R136

1

0

5

D

Z

1

0

5

U

R126

L118

R125

R127

R129

BTC201

R133

R134

R135

0
1

C
F

I

SIM201

C
2
3
3

C

R

2

2

3

1

2

3

C
2
3
4

SC101

C

R113

1
3
0

C131

S

P

C
1
0

A

0

M
1

0
0

C

C
1

1

1
6

1
9

L112

TP_GND

C123

C
1
0
6

T

T

T

P

P

P

_
T

_

_

I

D

_

T

P

T

K

C

T

_

R

P

T

R

T

T

M

D
O

S

TP_RSTON

R116

R114

3
0

R115

1
C
S

C120

L
1

C122

0

F

2

1

C117

0
0

L
1
0

C127

6

C125

C
2
0
4

R
2
1
2

D200

C
2
0
8

I

P

_

2

O

.

8

V

_

G

T

P

V

S
T
_
N

T
P
_
T
C
K

0
0
2

C

C

S

2
0
1

O

UCP201

C

C

2

2

3

3

5

6

R211

R214

C

C

C

3

3

3

0

1

0

8

5

9

U

R

3

3

0

2

2

3

1

0

8

C

S

R203

C
2
2
2

C
2
1
7

C214

SD300

C

R

R

R

3

3

3

3

0

0

0

1

6

7

9

0

R308

R306

U301

C
3
0

T

T

P

P

R311

3

3

0

0

1

6

1

0

4

C

S

C224

C221

1
0
2
E

M
U

C

R

1
1

1

0

1
9

S

O

I

I_

T

N

P

S

C

D
_
I

I_
P

P
S

S

C128

0

L300

C304

C
2
0
5

R
2
0
0

C
2
0
6

3

0

4

P

T

2

0

1

P

T

S

C

C

H
G

1

_

0

S

6

W

C

C

C

1

1

1

1

1

0

1

0

4

7

5

1
U

K

1

0

0

L
C

SPI_DI

_
I
P
S

C218

R207

TH200

R
1
2
8

C237

Q

C

C

1

3

2

0

0

3

0

2

8

R124

U300

C

C

3

3

0

0

1

3

C313

U

C307

3
0
5

3

0

0

P

T

U310

C219

O
S
C
2
0
1

C

C

C

1

1

1

3

3

3

5

7

9

R

C

1

1

C132

1

3

7

4

R215

0
0
2
U

R
3

R320

2
1

R
3
2
2

C220

T
P
2
0
0

9-3

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

9-2. S

IM Part

Insert SIM" is displayed on the LCD

"

VSIM_3.0V at the pin#1

SIM

200 = "

Is there any signal pin

#2,3,4

Yes

of SIM

Yes

H"?

201?

No

No

Check the SIM Power

Check UCP201

Check the SIM Card

END

9-4

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

SIM_DATA

Flow Chart of Troubleshooting

VSIM_3.0V

R213

SIM201

SIM_RST

SIM_CLK

R
2
0
4

C
2
2
3

C233

C234

C232

1
2
3

7

7

88

99

G

11 11

G

6
5

4

1212

1010

1314GG1516

R133

SIM201

R134

R135

SD300

C
2
3
3

C

R

2

2

3

1

2

3

C
2
3
4

T

T
P

P

_
T

_

R

T

S

M

T
_

S

N

R215

C

C

2

2

3

3

6

5

R211

C237

0
0

C

C

2

3

2

0

3

U

2

8

9-5

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

C

R

R

R
1
2
8

Q
1
0
0

R

3

3

3

3

0

0

0

1

7

9

6

0

R308

R306

Flow Chart of Troubleshooting

Microphone Part-Phone MIC

9-3.

Phone MIC does not work

Yes

Check the connection

of MIC

OK

Check thecomponents

which are connected to

MIC_BIAS

OK

Check the circuit

of MIC PART

OK

Is Phone MIC working?

Not OK

Not OK

Not OK

No

older MIC again

S

Solder R118, R132, C141, C145 and

older L108, R131, ZD100 and ZD103

S

C142 again

again.

Replace MIC

Yes

END

9-6

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

MIC_BIAS

Flow Chart of Troubleshooting

MIC100

0
0
1
D
Z

3
0
1
D
Z

L108

R131

0ohm

C142

R118

R132

C141

C145

C140

MIC_P

R130

MIC_N

C146

MAIN_MIC

C
2
0
5

C
2
0
6

4

3

0

P

T

0

1

2

P

T

S

C

C

H

1

G
_

0

S

6

W

C

C

C
1

1

1

1

1

0

1

0

5

7

4

1
U

K

1

0

0

L
C

SPI_DI

_
I
P
S

C
1
1

1

0

3

U

2

C
1
0
8

DD100DU100

0
0
1
T

F101

S

DCL100

R
_
T
B

C200

TP305

C
2
0
9

UCP201

L
2
0
2

1

O
S
C
2
0
1

R207

C

TH200

C

1

1

3

3

5

9

C
1

C132

3

4
C
1
4
6

R

R132

1
3
0

C
1

C145

4
0

R

C

C

R

C

2

2

2

2

2

0

0

1

1

9

7

2

1

C

C

C

L
2

2

2

2

0

0

1

1

1

0

2

3

C141

1
0

C

R118

2
2
8

C142

1

0

7

C

S

0
2
E

M
U

C

R

C

1
1

1

1

0

1

3

9

7

S

O

I

P

S

_

I

T

N

C

C128

C118

C109

C113

C111

D

I_

I_

P

P

S

S

U
M
P
_
N
O

FSC100

R
1
1
7

R

L
1

1

0

3

8

1

Z

Z
D

MIC100

D

1

1

0

0

3

0

C151

9-7

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

L107

L120

C
1
5
2

A
N
T
1
0
2

Flow Chart of Troubleshooting

Earphone MIC does not work

Microphone Part-Earphone MIC

9-4.

Yes

Check the connection

of IFC100

OK

Check MIC_BIAS.

When UCP201 operates

(

and call is connected

OK

Check the circuit

of EAR MIC

OK

Is Earphone MIC working?

)

Not OK

Not OK

Not OK

No

older pin3of IFC100 again

S

Solder R118, R132, C141, C145 and

older L111, L113 and R120 again

S

C142 again

Repeat the sequence

Yes

END

9-8

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

IFC100

HY20-AB0310

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

13

13

14

14

15

15

16

16

17

17

18

18

19

19

20

20

21

NC

22

NC

23

NC

24

NC

25

NC

26

NC

27

NC

Flow Chart of Troubleshooting

EAR_SW_REF

C133

R117

VCHG_5V

VBAT

L111
L113

L115

R122

L116
L117

R123

JIG_ON_IF

L118

R125
R126

TA_DETECT

1005

R129

6

5

R120

6

4

3

1

2

ZD104

R_ANT

C147

C150

5

4

3

1

2

ZD105

C149

C136

C138

R119

VDD_3.3V

EAR_N

VCM_OUT

EAR_P

R124

EAR_SW

AUX_DET
UART0_TD
UART0_RD

0
0
1
Q

JIG_ON

C148

3

D

C132

C134

C137

2

S

G
1

R128

EAR_MIC_P

C135

EAR_MIC_N

C139

USB_EN

USB_DP
USB_DM

MIC100

0
0
1

L108

D
Z

R131

0ohm

3
0
1
D
Z

MAIN_MIC

MIC_BIAS

C142

R118

R132

C141

C145

C140

MIC_P

R130

MIC_N

C146

9-9

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

R
3
2
4

BAT200

R
2
0
4

C
1
4
3

L302

S
P
E
A

ZD101

L110

L109

ZD102

3

0

7

K
E
R
_
P
A
D

U

R325

3

F

0

3

C305

3

3

F

F

0

0

1

2

U303

R

R

C310

3

3

1

1

2

3

C230

C231

1
0
3
C
D
H

D201

C312

C
1
3

R

C

3

1

1

2

3

0

6

C138

1

0

4

C147

C149

L301

C
3
1
6

R
2
0
1

L116

C311

R

C

L
1

1

1

1

2

5

7

3

0

U304

1

0

5

U

R126

C317

R125

C229

R136

BTC201

ANT100

C
1

ZD106

0
2

L100

L119

C101

C104

U
1
0

C100

R107

0

R100

C105

1

P

T

0

1

0

1

P

T

C153

L
1
0
4

C
1

C

C

1

1

2

2

4

6

R

R

1

1

1

1

2

1

C148

L111

L113

D

Z

R
1
2
2

1

0

5

L118

R127R129

2
1

L
1
0
5

L
1
1
5

D

Z

0

R101

U102

1

T

P

0

2

1

P

T

0

1

3

P

T

0

4

C129

0
0
1
C

IF

R114

S
C
1
0
0

R115

P
A
M

1
0
0

C120

C
1
1
6

C
1
0
6

L112

RFS100

R106

L114

C123

C
1
0
3

C
1
1
9

5
0
1
C
S

D200

3

C

0
1

2

C

0

S

8

L
1

C122

0

F

2

1

C117

0
0

L
1
0

C127

6

C125

C
2
0
4

R
2
1
2

R
2
0
6

C
2
1
6

R
2
0
2

SC102

C215

C
2
0
1

L200

0
0

C

2

2
2

C

2

C

S
O

UCP201

TP305

C

C203

2
0
9

C200

2
1

T
P

7

2

C214

L
2
0
2

0
0

O
S
C
2
0
1

R207

TH200

C
1
3
9

C132

C
1
4
6

R
1
3
0

C
1

C145

4
C
2
0
7

C
2
1
0

0

R

C

C

R

2

2

2

2

0

1

1

9

2

1

C

C

L
2

2

2

0

0

1

1

2

3

C141

1
0

C

R118

2
2
8

C142

1

0

7

MIC100

1
0
2
E

M
U

C

R

C

C

1
1

1

1

1

0

1

3

3

9

5

7

S

I

P

S

_

I

T

N

C
_

R

I

C

P

1

S

1

1

3

7

4

C128

C118

R132

C109

C113

C111

U
M
P
_
N
O

FSC100

C

S

R

L
1

1

0

3

8

1

Z

Z

D

D
1

1

0

0

3

0

C151

C
2
0
5

R
2
0
0

C
2
0
6

3

0

4

P

T

0

1

2

P

T

S

C

C

H

1

G
_

0

S

6

W

C

C

C

1

1

1

1

0

1

1

0

7

4

5

1
U

O

K

0

1

0

L

D

C

_

SPI_DI

I

_
I

P

P

S

S

C
1
1

1

0

3

U

2

C
1
0
8

DD100DU100

0
0
1
T

F101

S

DCL100

R
_
T
B

C

L107

1
5
2

L120

A
N
T
1
0
2

ANT101

9-10

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization