Samsung L810v Troubleshooting

10. Flow Chart of Troubleshooting

10-1.

Power On

Power On'does not work

'

Yes

Check the Battery Voltage

is more than

pin F10(PS_HOLD)

U400

=2.6

Check the Clock at

OSC

400=32.768

3.4V

Yes

V?

Yes

KHz

Yes

No

Check the

Change the Battery

related to PS_HOLD

U400

Resolder OSC

400

VREG_MSMC)=1.37V?

L400(

Yes

C423(VREG_MSME)=1.8V? C421(VREG_MSMP)=2.6V? C420(VREG_MSMA)=2.6V?

VREG_TCXO)=2.8V?

C425(

Yes

Check for the clock at

MHz

= 19.2

Yes

Check the initial operation

Yes

No

Check the U400

Check the clock generation circuit

relatedtoTCX100

(

)

END

10-1

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Flow Chart of Troubleshooting

U400

VREG_S2_2.2V

1 1 A

N

R

A

K

L

P S

W

_

D

V

VREG_RFRX1 VREG_RFRX2

VREG_RFUBM

PON_RESET_N

C N D

1 1 D

1

1 F

G

V

5

_

G

W

E

S

VREG_GP1

R

V

VREG_GP2 VREG_GP3

VREG_MMC VREG_MSMA VREG_MSME VREG_MSMP VREG_MSMC

VSW_MSMC

VREG_RFTX

VREG_RUIM

VREG_S2 VREG_S3

VSW_S2 VSW_S3

VREG_TCXO

VREG_USB

VREG_WLAN

ISNS_M ISNS_P

XTAL_IN

XTAL_OUT

SBCK

SBDT|SSBI

SBST

VCOIN BAT_FET_N CHG_CTL_N

VCHG

HSET_BIAS

KPD_PWR_N

MSM_INT_N

PS_HOLD

SLEEP_CLK

C

N

2

1

VLCD_2.9V

VREG_RFTX_2.85V VREG_MSMC_1.37V

VREG_FEM_2.7V

A3 A2 B1

L9 G11 K8 J11 K4

L400

K5

A9 A10 A8

TP400

B8 L10

L8

L6 K7 K6

L402 A1 G2 B11

D1 D2

L11 K11

F8

R405

G8

E8

R407

J10

E2

TP402

C2

TP403

C1 K1

TP404

L4

PM_INT

C10 G10 F10

C437

K9

R411

VBATT

L401

VREG_MSMP_2.6V

PMIC_SBDT

PHONE_ON PM_INT_N PON_RESET_N

SLEEP_CLK

C412

3

C413

1

OSC400

C428

2

OSC400

D400

2

1

C440

PS_HOLD

BOOT_SW

C414

C415

C418

C422

EXT_5V

C436

R408

25V

R409

1

POS

C439

BAT400

NEG

2

VREG_BT_2.6V

C417

VREG_LCD_2.6V

C426

VREG_MMC_2.85VVREG_RFRX2_2.7V VREG_USIM_3.0V

VREG_RFRX1_2.1V

VREG_MSMA_2.6V

C416

C427

C419

C420

VREG_MSMP_2.6V

VREG_MSME_1.8V

C421

C424

C423

VREG_S2_2.2V

C430

C434

C431

C432

C429

VREG_S3_2.95V

C435

C433

VREG_TCXO_2.8V

C425

VREG_TCXO_2.8V

TRK_LO_ADJ

R106

C124

TCX100

1

VC6VCC

2

NC

3

GND

OUT

NC

5

4

C127

R108

TCXO

C125

RTR6280_TCXO

C132

C131

10-2

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C420

C414

C334

C407

C406

O S

C 4 0 0

C437

R406

C416

C43 4 C435

C410

C401

0 0 4

U

PM_INT

C 4 2

C415

7

TP400

C

4

1

7

L 4

0 1

C 4

C40 8 C409

2 2

Flow Chart of Troubleshooting

3 2

R 4 1 0

1 0 4 P T

3 0 4 P T

C 4 1 8

C 4 2 5

C412

C426

4 0 3 U

C 4 0 4

R 4 0 8

C430

C 4 3 1

C 4 3 8

R312

6

0

6

3 0

C604

FPC608

C

1

3

1

2

C

R

1

2

0

4

6

R 1 0 8

C

P

F

R529

T C

X 1 0 0

C125C127

C541

F P C 6 0 7

2

R 3 0 1

C 3 3 9

C 3 4 2

R 3 1 4

TP_AMUX_OUT

TP404

L 4

0 0

L 4

0 2

8 5

TP402

6 6

M P

C

4

0

2

10-3

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Flow Chart of Troubleshooting

10-2.

Initial

Initial Failure

Yes

pin G13, G12 of UCP300="H"?

Yes

TP_A300,TP_D301,TP_ALE,T

[

P_NANDCS,TP_OE300,TP_C

AS,TP_RAS,TP__CS300,TP_

WE.TP_RESET_OUT]

IS

OK?

Yes

No

Check the circuit connected to reset

Check the circuit related to UME3

00

Check the circuit around LCD&HDC

Short or not solder)

(

Yes

END

600

10-4

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DAC_REF

VREG_MSMA_2.6V

Flow Chart of Troubleshooting

B21

MDDIC_DATP

A22

MDDIC_STBN

A21

MDDIC_STBP

B18

MDDIH_DATN

B19

MDDIH_DATP

A18

MDDIH_STBN

A19

MDDIH_STBP

TDI TDO TMS

C337

9 1 3 R

C339

VREG_MSMP_2.6V

R320

SDRAM_CLK

R321

BUFF_TCXO

PMIC_SBDT

SSBDT_RTR

C338

REF_OUT

UMTS_PA_EN

GSM_PA_PWR_CTL

UMTS_PA_RANGE0

PON_RESET_N

RESOUT2_N

SDRAM_RAS_N

SDRAM_CLK_EN

SLEEP_CLK

NANDFLASH_RE_N

SDRAM_CS_N

NANDFLASH_CE_N

SDRAM_CAS_N

TRK_LO_ADJ

RF_ON_TX_ON

TRST_N

RTCK

TCK

D14 A16 G15 D16 D15 D18 L21 H22 G25

AA20

D12 E15

AD15

AA22

E16 N24 N19 G17 D17 C24

G13 G12

W5

AA1

G1 M4

A15 B15

V2

AE6

V4

U5 W14 AB14

V5

K8

H13 E13 E11

TDI TDO TMS RTCK TCK TCXO SBCK SBDT SBST CCOMP DAC_IREF TRST_N WDOG_EN

PA_DAC_TEST PA_ON0 PA_POWER_CTL PA_POWER_CTL_N PA_RANGE0 PA_RANGE1 PLLOUT_TEST_SE

RESIN_N RESOUT_N RESOUT_N_EBI1

ROM1_CLK ROM1_ADV_N SDRAM1_CLK_EN

SLEEP_XTAL_IN SLEEP_XTAL_OUT

OE1_N OE2_N

XMEM1_CS_N0 XMEM1_CS_N2 XMEM2_CS_N0 XMEM2_CS_N1

XMEM1_HWAIT_N XMEM1_LWAIT_N

TRK_LO_ADJ TX_AGC_ADJ TX_ON

10-5

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Flow Chart of Troubleshooting

C326 C333

VREG_MSMP_2.6V

VREG_MSME_1.8V

C323

C325

C324

C330

C327

C329

C328

C332

C331

A1(0:12)

SDRAM_D(0:31)

SDRAM_DQM(0) SDRAM_DQM(1) SDRAM_DQM(2) SDRAM_DQM(3)

SDRAM_BA0 SDRAM_BA1

TP_A300

A1(0) A1(1) A1(2) A1(3) A1(4) A1(5) A1(6) A1(7) A1(8) A1(9) A1(10) A1(11) A1(12)

TP_D301

SDRAM_D(0) SDRAM_D(1) SDRAM_D(2) SDRAM_D(3) SDRAM_D(4) SDRAM_D(5) SDRAM_D(6) SDRAM_D(7) SDRAM_D(8) SDRAM_D(9) SDRAM_D(10) SDRAM_D(11) SDRAM_D(12) SDRAM_D(13) SDRAM_D(14) SDRAM_D(15) SDRAM_D(16) SDRAM_D(17) SDRAM_D(18) SDRAM_D(19) SDRAM_D(20) SDRAM_D(21) SDRAM_D(22) SDRAM_D(23) SDRAM_D(24) SDRAM_D(25) SDRAM_D(26) SDRAM_D(27) SDRAM_D(28) SDRAM_D(29) SDRAM_D(30) SDRAM_D(31)

0

1

9

5

1

8

1

P

C

B

N

H

D

B

M

H

D

N

D

N

D

C

C C V

K4

A0

L1

A1

L2

A2

L3

A3

C2

A4

D2

A5

E1

A6

D3

A7

E2

A8

D4

A9

K3

A10

F2

A11

F1

A12

L4

DQ0

L5

DQ1

L6

DQ2

L7

DQ3

K8

DQ4

L8

DQ5

K7

DQ6

K5

DQ7

K6

DQ8

G7

DQ9

J6

DQ10

J5

DQ11

H6

DQ12

H5

DQ13

J4

DQ14

G3

DQ15

G4

DQ16

F4

DQ17

E4

DQ18

F5

DQ19

H3

DQ20

H4

DQ21

E6

DQ22

F7

DQ23

F6

DQ24

D5

DQ25

E8

DQ26

D6

DQ27

D8

DQ28

D7

DQ29

C8

DQ30

C7

DQ31

J8

DQM0

G6

DQM1

F8

DQM2

E7

DQM3

J3

BA0

K2

BA1

S S V

9

1

B

C

V

S

V

0

9

5

1

D

C

Q

C

V

C V

UME300

S

V

0

9

1

F

H

E

G

0

9

1

L

E

D

D Q C C V

S S V

9

1

J

N

K

G

J

F

M

D

Q

C

V

S

V

0

9

2

1

M

L

K

N

TP_D300

C

N1

V

IO1 IO2 IO3 IO4 IO5 IO6 IO7 IO8

IO9 IO10 IO11 IO12 IO13 IO14 IO15 IO16

ALE CLE

_CE

_RE _WEN _CAS _RAS

_CS

CKE CLK

_WED

_WP

RY_BY

DNU DNU DNU DNU DNU DNU DNU DNU DNU DNU

NC NC NC NC NC NC NC NC NC NC NC NC NC

S

V

6

9

P

D2(0)

N2

D2(1)

N3

D2(2)

M5

D2(3)

P7

D2(4)

M6

D2(5)

N6

D2(6)

M8

D2(7)

P2

D2(8)

P3

D2(9)

N4

D2(10)

P4

D2(11)

P5

D2(12)

N7

D2(13)

M7

D2(14)

N8

D2(15)

C4

TP_ALE

B4

TP_NANDCS

B6

TP_OE300

B3 B7 H2

TP_CAS TP_RAS

G2 J2

TP_CS300 E3 G8

TP_WE

K1 C3

TP_RESET_OUT C6

B2 E5

R317

F3 G1 G5 H7 H8 J7 M3 M4

1

2 A2 A9

A10

B1

B10

P1

P10

R1 R2 R9

R10

D2(0:15)

VREG_MSMP_2.6V

NANDFLASH_ALE NANDFLASH_CLE NANDFLASH_CE_N NANDFLASH_RE_N WE2_N SDRAM_CAS_N SDRAM_RAS_N SDRAM_CS_N SDRAM_CLK_EN SDRAM_CLK SDRAM_WE_N RESOUT2_N NANDFLASH_READY

UME300

10-6

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Flow Chart of Troubleshooting

10-3.

Charging Part

Abnormal charging part

U402

Check the Battery&TA

C443=5

pin5="H"?

Yes

V?

Yes

No

Resolder IFC

Replace

U402

600

CHG_ING_N

USB_5V

Yes

END

VREG_MSMP_2.6V

R414

C441

R416 R417

1

2

3

4

5

R418

USBIN

IUSB

PWR

CHRG

U402

BATDET

GND

11

DCIN

BAT

IDCITERM

VBATT

10

9

8

7

6

EN

C442

EXT_5V

VF

CHARGE_EN

C443

10-7

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Flow Chart of Troubleshooting

10-8

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Flow Chart of Troubleshooting

10-4.

Sim Part

Insert SIM is displayed on the LCD

"

SIM

(

Check the voltage at pin#1 of

Yes

Check the SIM connector's

connection to SIM card

500)

Yes

SIM

500 >= 3.0V ?

No

Resolder or change SIM

Check the U400

500

Yes

Is there any signals pin#2,#3,#4

of SIM

500 ?

Yes

Check the SIM Card

Yes

END

No

Check the U400

10-9

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Flow Chart of Troubleshooting

VREG_USIM_3.0V

SIM_RST SIM_CLK

11

22

33

SIM500

6

5

4

R529

SIM_IO

7GG89GG10

C543

C 3 4 2

R 3 1 4

F P C 6 0 7

C544

C545C542

I

5

0

M

S

C541

R 3 1 6

R 4 1 5

C340

R300

R318

R412

U 3 0

U404

5

R 4 1 3

D401

C

5

4

2

3

C

C 5

5

4

5

4

10-10

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Flow Chart of Troubleshooting

10-5.

Microphone Part

Microphone does not work

Yes

Is the assembled status of

microphone O.K?

Yes

C526is1.8V

Yes

No

Replace the Front Assy'

No

Check the path around MIC bias circuit

Is microphone ok?

Yes

END

No

Check UCP300

10-11

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Flow Chart of Troubleshooting

10-12

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Flow Chart of Troubleshooting

10-6.

Speaker Part

Speaker does not work

Is the terminal of speaker

Is there any signals at

Check Slide FPCB.

OK?

Yes

C519 and C520

Yes

R512 and R513

Yes

No

Check the Speaker Wire

Check UCP300

Check the circuit around U500

END

Yes

10-13

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Flow Chart of Troubleshooting

LINE_OP LINE_ON

AMPBIAS

MSM_HPH_L MSM_HPH_R

EAR_L EAR_R

C519 C520

C521

C522

C523

R530

R514 R515

INA1 INA2 INB1 INB2 INC1 INC2

C1N C1P

HPL HPR

IC IC

U500

2

3

1

5

1 A

D N G P C

5

3

A

6

1

5

1

F

D

B

D

V

P

C

S

D

S

D

N

V

N

P

G P

C

G

1

6 F

D

OUT+ OUT+

OUTOUT-

OUTRX

SCL

SDA

SHDN

VBIAS

NC

D

NC

N

S S

G

V

P

5

3 F

B

C1

R512

F4 E1

R513

F2

C6

D2 C2 E2 B3

1

C524

2

S A

I B P M A

C

5 C

AUDIO_SCL

R531

6 1 5 R

AUDIO_SDA

SPK+

SPK-

AMP_EN

VBATT

4

1

5

5 C

C

E3 E4 E5 D5 B4 C5

A4 A2

A6 B6

B2 E6

C525

6

0

C

D

H

C

R 3

0

4

6

F

0 8

C

3

0

1

4

6

7

C

R

R513

C513

R

C

5

2

1

2

8

9

0

R512

C512

C601

C514

U 5 0

0

R

5

1

4

5

6

0

C

D

C511

R531

R

C 5 2 3

C 5 2 5

F602F603F605

R

C

5

3

1

2

0

6

4

R

C

C 5 2 2

5 2 1

R600

3

1

0

9

C600

H

C

3

0

2

0

7

6

C

R303

F P C 6 0 9

R302

C311

C310

C315

C318

3 0 8

C 3 0 9

C 3 3 7

GSM_PA_EN

C301

C305

R 6

6

0

6

F

0

2

MSM6260-NSP

R 6

0

1

6

F

0 1

UCP300

C

3

2

3

2

1

8

2

MODE300MODE301

C 5 3 3

C 5 0 5

T P _ A 3 0 0

C530

C538

C501

C509

R319

C303

C313

C 3 1 4

C

3

0

4

1

3

0

C

R

5

2

9

3

R 5 2 4

C

R

5

3

2 7

5

C

R

5

0

C

3

0 5 0 4

R

C

5

0

6

8

R

3

0

4

6

R517

R

C

3

5

1

3

5

6

10-14

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Flow Chart of Troubleshooting

10-7.

Receiver Part

Receiver does not work

Does Speaker work well?

pin4,pin8 of U504 is'H'

R526 is'H'

Yes

No

Check the Speaker wire

No

?

No

Change the U504

Change or resolder R526

Yes

Is Receiver OK

Yes

END

No

?

Change the Speaker

10-15

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Flow Chart of Troubleshooting

EAR1_OP

SPK+

AUD_SEL

R525

U504

3

COM1

4

IN1

5

NC1

VBATT

6 2 5

R

2

1 O N

D N G

6

1

+ V

NO2

COM2

IN2

2 C N

7

C534

0 1

9

8

R528

EAR1_ON

SPK-

AUD_SEL

V608

V601

R526

C 5 3 4

U 5

0 4

R 5 2 5

R 5 2 8

C513

C 5 2 0

C512

C601

R513

C 5 1 9

R512

C514

F603F605

10-16

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