Samsung SGH-F300 Service Manual

SAMSUNG Proprietary-Contents may change without notice

3. Flow Chart of Troubleshooting

3-1

This Document can not be used without Samsung's authorization

3-1.Baseband3-1-1. Power ON

'Power ON' Does not work

Check the current consumption

Current consumption

≥100mA ?

Check the battery voltage

Down load again

Voltage ≥ 3.3V ?

Check the pins of U838

C215 ≥ 1.8V ?

Check the Initial operation

END

C217 and C218 = 2.8V?

Charge the Battery

Check the clock generation circuitTCX100

Check the clock signalat pin #3 of TCX100

Freq.=26MHz,Vrms ≥300mV

Check U838 and C219

Check U838 and C215

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

C219=1.5V?


Flow Chart of Troubleshooting


3-2

K12

1SS

V5

G2S

SV

4K

3SS

V2

R6

P4S

SV

MC

VXV

31R

QA

NEOX

1D

VLDO_2 J12A13VLDO_3

VLDO_4 B12

VLDO_5 B10

VLDO_6 A14VLDO_7 C12

VREF A10

NG

ERV

41R

PG

ERV

31M

VRTC H11VSIM

5N

2OI_

DD

V4J

LTC

O_D

DV

4C

VEXT E14

VIB_DRV F15

9LNE_

GN

R_BIV

VL4S_A A12VL4S_B B11

VL5S_A D10C9VL5S_B

VLDO_1 G11

E13

1D

DV

3J

VDD12 J13

2D

DV

3M

3D

DV

6N

C11VDD34

5D

DV

01C

76D

DV31

B

BD

DV

6A

DD

DV

11N

VD

DV11L

1OI_

DD

V

B1 SERLE1SERLE2A2

SIM_CLK K14

SIM_IO J11SIM_RST K11

PXT7E

UP_CLK N9

UP_IO P10UP_RST R10

VACC F14

VBAT

KLC_

CTR

4N

RWNL2

NIXTXR

6D

PIXTXR

7D

NQXTX

R6

CP

QXTXR

7C

SCLK_PSC L8

M7SDI_PSCSDO_PSC N7

SERCKC2C1 SERDA

OCTL7

FU

B_1W

SP7L

PEE

K_R

WP9

M

N1W

S_R

WP51

C2

WS_

RWP

41C

1FER

AR

6B

2FER

AR

5B

R3 RESETN_CSP

O_TE

SER

9K

RING_DRV F13

RTC_ALMNH10

ED

OM

01N

15

CN

6C

N2

OCTL0E6C5 OCTL1F5 OCTL2E5 OCTL3

OCTL4A4G6 OCTL5

OCTL6B3A3

51B

2CS

P_D

NG

51K

QRT

NI01L

L3 I|O

LED1_DRV G13LED2_DRV G12

CM

6R

41M

NNI

CIM

PNI

CIM

41N

NTU

OCI

M51

PPT

UO

CIM

51N

3S

DN

G9F

4S

DN

G01F

5S

DN

G7

G6

SD

NG

8G

7S

DN

G9

G8

SD

NG

01G

9S

DN

G6

H

VD

NG

31P

RU

CH_

DN

G11F

LTC

O_D

NG

4B

1CS

P_D

NG

QD

NG

8E

1S

DN

G7F

01S

DN

G7

H11

SD

NG

8H

9H

21S

DN

G31

SD

NG

7J41

SD

NG

8J51

SD

NG

9J01J

61S

DN

G71

SD

NG

01K

2S

DN

G8F

K3J5 DB3

DB4J6DB5H5DB6G3DB7G4DB8F4

F1 DB9

3PRT

NID

BD

NG

6F

01M

DD

NG

6L

ODI

AD

6M

NRI

AD

4P

DB0K1K2 DB1

DB10F2DB11F3

E2 DB12DB13E3DB14D3

D2 DB15

DB2

PNIX

UA

51M

NTU

OXU

A31L

PTU

OXU

A31

K3

CD

A_XU

A31

D

CH_BDRV E11CH_ISEN F12CH_RES D14

E9CREF

CSN_PSC K8

KCI

AD

4R

IDI

AD

AB7AB8K5

ADC_AUX1 E10

ADC_AUX2 D15

5P

4XU

A_C

DA

CFA

9D

NAT

UO

A21

NP

ATU

OA

11P

NBT

UO

A21

PP

BTU

OA

21R

NNIX

UA

41L

U838

AB0K6P1 AB1

AB2L5N1 AB3

AB4N2AB5M2AB6M1

K7

C209

VCCB_2.9V

TP_CSN_PSC

R214

C202

VCCB_2.9V

R211

TP_VACCT_DSP_IO

R205

VCCD_2.8V

VCCA_2.8V

BAT200

12

R204

C220

VCCA_2.8V

VBAT

R210

VBAT

VRF_2.8V

C215

132C

C218

VRF_2.8V

VRTC_1.5V

302C

VLDO_1.5V

HPEIO_1.8V

VCCD_2.8V

232C

C221

VLDO_1.8V

332C

C216 C217

322C

C201

212R

SUB_BATT

C228

VBAT

C214

TH200

C219

C230

C200

FLASH_RESET

ICHRG

EAR_ADC

FU

B_1W

SP

QA

NE

OX

RX_ENPAC_EN

DSP_IODSP_RWN

SX_EN

NNI

XU

A

NTU

OXU

A

BAND_SELMOD_SEL

XOENATX_EN

PNI

CIM

NNI

CIM

PTU

OCI

MNT

UO

CIM

PNI

XU

A

PTU

OX

UA

UP_SDOUP_SCLKUP_CS

GSM_TX_ENDCS_TX_EN

PI_XTR

NI_XTR

PQ_

XTR

NQ _

XTR

PAT

UO

AN

ATU

OA

PBT

UO

AN

BTU

OA

K23KL

C

PS

C_M31

KLC

NO_

RW

PN

O_GIJ

SIM_RSTSIM_IO

VSIM

SIM_CLK

DSP_DB(14)DSP_DB(13)DSP_DB(12)DSP_DB(11)DSP_DB(10)DSP_DB(9)DSP_DB(8)DSP_DB(7)DSP_DB(6)DSP_DB(5)DSP_DB(4)DSP_DB(3)DSP_DB(2)DSP_DB(1)DSP_DB(0)

DSP_AB(0:8)

DSP_AB(8)DSP_AB(7)DSP_AB(6)DSP_AB(5)DSP_AB(4)DSP_AB(3)DSP_AB(2)DSP_AB(1)DSP_AB(0)

TNI_

PS

D

SERLESERDATSERCLK

CPAV

CFA

DSP_DB(15)

INTRQPWR_KEEPRST

RTCALARM

UP_SDI

SIMCLK

SIMDATASIMRST

DSP_DB(0:15)

VRF_2.8V

C125

R112

C126

C129

R113

R111

AFC

CLK26M



3-3





3-4

3-1-2. Initial

The voltage at the C215=1.8V?The voltage at the C218=2.8V?

Initial Failure

The voltage at the VR301" Low --> High" ?

There is 32.768KHz waveform at the C317, C318 ?

The voltage is 2.8Vat the C216,C217,C218 ?

LCD Display OK ?

Sound operation OK ?

END

Check the UCP300

Check the U838

Check the LCD part

Check the Audio part

YES

NO

NO

NO

YES

YES

YES

YES

NO

NO

NO

YES

Check the U838(If it has some problem,

it has to be replaced.)

Check the U838(If it has some problem,

it has to be replaced.)



3-5


C307

TDI

C318

TP_ROM1_CS

HP_CORE_1.57V

C310

TDOTP_OEN

R325

R327

C305

CTR2

X

2S

SV

3S

SV

8G

9G

4S

SV

5S

SV

8H

9H

6S

SV

7S

SV

01H

11H

8S

SV

9S

SV

21H

D_A

SSV

11R

81FU_

AS

SV

CTR1

X91

H91F

1S

SV

2A

21J01

SSV

11SS

V8

K7L21

SS

V31

SS

V8L8

M41

SS

V51

SS

V9

M01

M61

SS

V71

SS

V11

M21

M81

SS

V

81A

8W

81W

81_8P1_

OI_D

DV

6B

2_8P1_

OI_D

DV

3_8P1_

OI_D

DV

21B

61B

4_8P1_

OI_D

DV

5_8P1_

OI_D

DV

1C

41C

6_8P1_

OI_D

DV

7_8P1_

OI_D

DV

9D

81D

8_8P1_

OI_D

DV

1F9_8

P1_OI_

DD

V

81G

CTR

V

6E

RO

C_D

DV

7E

RO

C_D

DV

7V

31V

8E

RO

C_D

DV

1_8P1_

OI_D

DV

4B4L

01_8P1_

OI_D

DV

11_8P1_

OI_D

DV

61L1

P21_8

P1_OI_

DD

V31_8

P1_OI_

DD

V81T

1U

41_8P1_

OI_D

DV

5U

51_8P1_

OI_D

DV

21U

61_8P1_

OI_D

DV

71_8P1_

OI_D

DV

21R

NTS

RT

0XT

3M

1XT

7K

11TD_

AD

DV

71FU_

AD

DV

1E

RO

C_D

DV

8B

31B

2E

RO

C_D

DV

3E

RO

C_D

DV

2G

81H

4E

RO

C_D

DV

5E

RO

C_D

DV

2M

81N

4R

SPRXD1_PIO17 M17

DS2I_0

DXT

PS

2U

SPTXD1_I2SD_PIO16 N16

TCK U14V14TDI

TDO T12

TEST1 U15T14TEST2

TEST3 V16

SMT

41W

71H

2N

40OI

P_0ST

R

V6RWN

82Q

RI_0X

R1

M

6L82

QRI_1

XR

KLC

MIS

4P

2TOI

MIS

3R

0KL

CP

SM18SPCLK1_PIO18

3T0

SFP

S

SPFS1_PIO15 N15

0D

XR

PS

51JKL

C_IC

M_83OI

P

41LN

E_D

MC_I

CM_93

OIP

NE_TA

D_IC

M_04OI

P41

M

XTA

DRI_14

OIP

61R

XR

AD

RI_24OI

P71

R

41N

NE_0TA

D_ IC

M_34OI

P

J16PIO475

G64

OIP_1

MW

PNTS

ER

51G

10OI

P_OI

R3

P

NM

RAL

ACT

R

61U

72OI

P91

U71

W82

OIP

E14 PIO30_WAITN

PIO31_IRQ6 P12

23OI

P31

R

U18PIO33PIO34 R14

PIO35_A_A25_BOOTSELF2

61FN

EO_B

SU_63

OIP

ATAD_B

SU_73

OIP

71E

81C

71D

OP

V_BS

U_21OI

PO

MV_B

SU_31

OIP

61E

5P

TS

RMI

S_41OI

P

51P

PE

EK

RW

P_91OI

PQ

ER

KLC

SY

S_02OI

P91

P

0TAD_I

CM_12

OIP

31K

1TAD_I

CM_22

OIP

21L31L

2TAD_I

CM_32

OIP

3TAD_I

CM_42

OIP

51L

91V

52OI

P62

OIP

3H

8D

RBY

EK

9D

RB

YE

K6

G

11

CN

2C

N2

61G

TU

O23C

SO

PIO00_IRQ5 P16

91B

PS

US_B

SU_70

OIP

DM

C_IC

M_80OI

P31J

91C

IP

V_BS

U_90OI

P

01OI

P71

V

IM

V_BS

U_11OI

P

IRQ4

7J0

DRB

YE

K1

DR

BY

EK

6J 4G

01D

RBY

EK

11D

RBY

EK

2H

5J2

DRB

YE

K4J

3D

RBY

EK

8J4

DR

BY

EK

FU

B_1W

SP_5

DRB

YE

K6

H4

H6

DRB

YE

K7

DRB

YE

K1

H

T8T9D_D8

D_D9 R9

FLASHRSTNH14

T15INT0IO W6

V12IOBIT0_PIO05IOBIT1_PIO06 N11

M16IRQ1M19IRQ2

IRQ3 P17P18

D_D11 P9N8D_D12

D_D13 N9N10D_D14

D_D15 P11

R7D_D2D_D3 T7

R8D_D4D_D5 V8

U8D_D6D_D7

W2W3D_A2

D_A3 V3U4D_A4

D_A5 T5V4D_A6

D_A7 N6R6D_A8U6D_D0T6D_D1

P8D_D10

E12

A_OENB14D14 A_WEN

21W

IK

C

N12CKO_IACK

T17CPTSTSTOP_CKO

92OI

P_0ST

C6

M5

N44

OIP_0

DC

D

2P

20OI

P_0R

SD

30OI

P_0RT

D4

N

V1D_A0D_A1

A_D13D12E13 A_D14

A_D15D13

F9 A_D2A_D3G10

G11 A_D4A_D5F11

E11 A_D6A_D7G12A_D8D11A_D9

A_CS2NA_CS3NJ14

D15 A_CS4NA_CS5NC16

F15 A_CS6NA_CS7NB17

A8 A_D0A_D1E9

C12 A_D10A_D11A12

F12 A_D12

A6C6 A_A4

A_A5C5D7 A_A6

A_A7E7C4 A_A8

A_A9C2

H16 A_BE0NA_BE1NA17

A14 A_CS0NA_CS1NC15

G14

E8 A_A16A_A17F8

E6 A_A18A_A19D2

A_A2D8

E4 A_A20A_A21E3

F5 A_A22A_A23F4

F3 A_A24

A_A3

L5T13ATDO_PWM2

K12ATMS_PIO45

B7 A_A0A_A1C8

A3 A_A10A_A11B3

B1 A_A12A_A13D6

D5 A_A14A_A15D3

HP_CORE_1.57V

UCP300

M4ATCK_CTS1ATDI_RTS1

C309

C317

R304

OSC300

HPEIO_1.8V

C308

TP_RAM1_CS

R324

TMS

C302

TCK

R323

C306

GND

VRTC_1.5V

C311

HPEIO_1.8V

C304C303

TP_MV_CS

R326

TP_WEN

MIC_AMP_EN

CARD_INS

SUB_BATT_SW

D_SDA_HPE

RADIO_SEL

MP3_ENABLE

MP3_SDAMP3_SCL

HOLDKEY_EL_ON

MODE_SELECT

LCD_CON

D_SCL_HPE

USB_ON

BT_RTSBT_RXDBT_TXD

BT_EN

D_SDA

PCM_SYNCPCM_INPCM_OUTPCM_CLK

ROM2_CS

A(0)

RAM1_CS

CHG_DET

R_RW

MV_INTJACK_ININTRQ

CP_TMS

TR_RSTCLK13M_HPE

DSP_INTDSP_IODSP_RWN

VIB_EN

AMP_EN

DAC_RESET

MV_RSTVBUS_GPIO

CF

FLIPPER_USB

D_SCL

BT_CTS

SDS_RXD

KEY_COL(0:4)

KEY_COL(4)KEY_COL(3)KEY_COL(2)KEY_COL(1)KEY_COL(0)

KEY_ROW(0:4)

KEY_ROW(3)KEY_ROW(2)KEY_ROW(1)KEY_ROW(0)

KEY_ROW(4)

PSW1_BUF

RTCALARM

MVCORE_ONEAR_SWITCHCHG_OFF

CLK32K

XOENAQPWR_KEEP

USB_CON

CP_TDOCP_TDICP_TCK

DSP_DB(2)DSP_DB(3)DSP_DB(4)DSP_DB(5)DSP_DB(6)DSP_DB(7)DSP_DB(8)DSP_DB(9)

USB_DET

USB_VMO

USB_DATA

USB_VPO

USB_OEN

UP_SCLK

USB_SUSP

UP_SDO

UP_CSUP_SDI

SDS_TXD

DSP_AB(5)DSP_AB(4)DSP_AB(3)DSP_AB(2)DSP_AB(1)DSP_AB(0)

DSP_AB(8)

DSP_DB(0:15)

DSP_DB(0)DSP_DB(1)

DSP_DB(10)DSP_DB(11)DSP_DB(12)DSP_DB(13)DSP_DB(14)DSP_DB(15)

D(14)D(13)D(12)D(11)D(10)D(9)D(8)D(7)D(6)D(5)D(4)D(3)D(2)D(1)D(0)

CP_WENCP_OEN

FLASH_RESET

MV_CS

ROM1_CS

UPPER_BYTELOWER_BYTE

SIMDATASIMCLK

SIMRST

DSP_AB(0:8)

DSP_AB(7)DSP_AB(6)

A(1)A(2)

A(11)A(12)A(13)A(14)A(15)A(16)A(17)A(18)A(19)A(20)

A(3)

A(21)

A(4)A(5)A(6)A(7)A(8)A(9)A(10)

A(22)A(23)A(24)

A(0:25)

D(0:15)

D(15)




3-6



3-7


3-1-3. Charging

Abnormal charging part

The pin #19,20of IFC 502VEXT ≥ 5V?

Replace TA, Check IFC502NO

The pin #5of U200 is"low"?

check the U200,R255NO

YES

YES

The pin #10 of U2003.5 ~ 4.2V? check the U200

NO

YES

The pin #4 of U839is

"High"?check the U839

NO

YES

END




3-8



3-9




3-10


3-1-4. Sim Part

The voltage is 2.8Vat the pin #6 of SIM200?

Check the U838

"Insert SIM" is displayed on the LCD

END

Check the SIM Card

YES

NO

NO

YES

Is there any signalpin #1,2,4 of SIM200 ?

Check the U838 & UCP300




3-11

C207

NC

1 122

3 344

5 56 6

NC78

SIM200

C208 C206C204 C205

SIM_CLK

VSIM

SIM_IO

SIM_RST



3-12


3-1-5. Speaker Part

Is the terminal of speaker O.K?NO

Replace the speaker

Are there any signalat the pin #1, 3 of CN400?

YES

Check the CN400

There is no sound from speaker

YES

NO

Are there any signal at thepin #J4,J5 of UCD400?

NOYES

the voltage of L400 is 3.3V? check R414, R415?

Check U202

NO

the voltage ofC247 is 1.8V?

NO

YES

YES

END

Are there any signal at the pin#G8,F9,G9 of UCD400? Check UCP400

NO

YES

Check U838

Check U208




3-13

C451

R442

B1

VIMC1

A1 VIP

VOM A3

C3VOP

A2

VSS

U403

NE

2C

CN

1

CN

2

DD

VP2

B

B3PVSS

VDD

C453

C450

R448

R447

R443

L402

VBAT

L401

C458

R446

L403

TA400

C452AMP_EN

SAPA_P

SAPA_N

DAC_SPKP

DAC_SPKM

8 89 9

11NC NC

12

11

10 10

2 23 3 44

55 667 7

CN400

MOT_3.3V

SPK_PSPK_N

GND

IN14

IN2 8

NC15

NC2 7

NO12

NO2 10V+1

U401

3 COM1

9COM2

6GND

11R445

C448 C449

R444

C455

VBAT

C454

AMP_EN

SAPA_N

SAPA_P

AOUTAP

AOUTAN

SPK_P

SPK_N



3-14




3-15


3-1-6. Camera Part

Camera function does not work

Check the connect CN503?NO

Connect the CN503

Pin #5 of U208= 1.8V?NO

NO

Pin#3 of OSC400 is 24MHz?NO

Pin #4 of U205 = 2.8V?

END

YES

YES

YES

YES

Is that clock signal at thepin #3 of CN503?

NO

Pin #1 of U205 = High?

YES

Check the U208&L201

CheckUCP300

NO

NO

Pin#13 of CN503 is High? CheckUCP400

Replace OSC400and check UCP300

YES




3-16

C247TA205

L201

4

2 GND

SW 5VIN1

U208

EN3 FB

VBAT

002F

2

13

VLDO_1.5V HPEIO_1.8V

C514

245R

V

C518 C520

545RV

445RV

VCAM_1.5V

C513

015C

C515

VCAM_2.8V

C527

045R

V

D1NS201

GA51

MLB

345RVL501

C517

L500

C516

745RV

C519

645RV

Y(0)Y(1)

Y(3)

Y(5)Y(4)

Y(6)Y(7)

CAM_SDA

CAM_MCLKCAM_SCL

VSYNC

HSYNCCAM_RESET

CAM_PCLKY(2)

C243C245

VCAM_2.8VVBAT

2 GND

6GND

5NCSTBY1

3 VIN4VOUT

U205

VCAM_EN



3-17





3-18

CheckU202

CheckUCD400

3-1-7. Mp3 Part

NO

Replace the Earphone

Are there any signalat the pin #5,7 of CN502?

NO

Check C422, C423and VR526, VR527

There is no MP3 sound from Earphone

YES

YES

The voltage of C237is 3.3

NO

YES

END

Check the UCD400

Are there any signalat the pin #9 of CN502?

Are there any signalat the pin #C8,D8 of UCD400?

NO

YESThe voltage of L400

is 3.3V?

YES

The voltage ofR213 is 1.8

NO

YES

END

NO

Check U838

Check the CN502

Check the UCP300



3-19


954C 124

C

C423

434C

HPEIO_1.8V

R417

334C

VCCA_2.8V

DAC_3.3V

914C

104AT

GPIO1 J9

2A

DDV

A1J

MONO_LOPJ2

MONO_LOMJ3

LEFT_LOPJ4

LEFT_LOMJ5

RIGHT_LOPJ6

RIGHT_LOMJ7

GPIO2J8

HPROUT G1

CA

D_SS

VA

2G

MCLKG8

BCLK G91

AD

DV1

H

CA

D_S S

VA

2H

/RESETH8

DD

VD

9H

HPLCOME1

SS

VR

D2E

SELECTE8

DINE9

HPRCOMF1

SS

VR

D2F

DOUT F8

WCLKF9

1A

DD

V1

C

CD

A_SS

VA

2C

SCLC8

DD

VOI

9C

HPLOUT D1

CD

A_SS

VA

2D

SDAD8

SSV

D9

D

MICDETB2

MIC3LB3

LINE2RPB4

LINE2LMB5

LINE1RMB6

LINE1RPB7

MFP0B8

MFP1B9

LINE2RMA3

LINE2LPA4

LINE1LMA5

LINE1LPA6

NC A7

MFP2A8

MFP3A9

1A

DDV

1B

TLV320AIC33IZQER

UCD400

NC 1

NC2

MIC3RA1

MICBIASA2

C422

C432

L400

R415

024C

C436

R416

C437

R414

424C

524C

C429

1UFC430

C4281UF

C431814

C

DAC_SPKMDAC_SPKP

AOUTBNAOUTBP

MICN

MICP

CSP_MICPCSP_MICN

FMA_RFMA_L

IF_EAR_L

IF_EAR_R

D_SCLD_SDA

D_SDOUTD_SDIN

D_LRCKD_MSCK

D_BCK

DAC_RESET

R506

100K

R511

825RV

025RV

R510

C529

VBAT

525RV

215R

180K

R504

725RV

225RV

HPEIO_1.8V

405DZ

425RV

325RV

R505

100K

505DZ

R508

035C

705R

ZD503

NC 28

135C

889 9

21NCNC22

NC2324 NC

NC 2526NC27NC

22

2020

3344

556

67 7

1212

1313

141415

1516

1617 17

181819 19

CN5021

1

101011

11

VCCD_2.8V

125RV

925RV

USB_5V

R509

625RV

C528

USB_D-

FM_ANT

EAR_SWITCH

TA_VEXT

EAR_ADC

EAR_MIC_PEAR_MIC_N

IF_EAR_R

IF_EAR_L

JACK_IN

T_OPTSDS_RXD

JIG_ON_IFUSB_D+

VBAT DAC_3.3V

C236

2 GND

6GND

NC 51 STBY

3 VINVOUT 4

U202R213

HPEIO_1.8V

C237




3-20



3-21


3-1-8. External Battery

The SGH-F300 does not detectthe external battery

Check the state of the 3-pin connector between SGH-F300 and External battery, External battery voltage.

Check the state of 3-pin connectorIn external battery is OK?

Check the voltage ofExternal Battery

Vext > 3.2 ?

Check the voltage ofExternal Battery

Vext > 3.2 ?

END

Replace the external battery

Replace the external battery

Replace the 3-pin connector in SGH-F300

YES

YES

YES

NO

NO

NO




3-22

G N D V extV f

Pin A rray of ex ternal battery

The 3-pin connector of ex ternal battery

The 3-pin connector of SG H -F300



3-23


3-1-9. BLUETOOTH

BT connection disable

check BT function ON Check the S/W

Is the Antenna of BT OK? Change BT Antenna

check the BT_EN R120R120 is High? replace UCP300

Is the voltage 1.8Vat C140 or at pin#3 of U103 Change BT Antenna

END




3-24




3-25

LayoutLayout

ㅠㅂ



3-26


3-2.RF

3-2-1. EGSM RX

Continuous RX ONRF Input : 62 CH

AMP : -50dBm

NORMAL CONDITIONCatch the channel ?

YES

NO

DUF100 CheckPin #13 ≥ -65dBm ?

DUF100 CheckPin #5,6 ≥ -65dBm ?

U100 CheckPin#6, 7 ≥ -65dBm ?

Check soldered status ofR121

RFS100, C103, L100Resolder or Change

DUF100 Resolder or Change

U100 CheckPin#34 =Clean 2.8V?

U100 CheckPin#35,36,37,38=100mV?

C106Check or resolder

Check U838

NO

NO

YES

YES

YES

NO

YES

U100 CheckPin #21 : 26MHz ?

Vpp : 1.1V?

R113 = 26MHz ?Vpp = 1.2V? R111 = 2.8V ?

U100Change or resolder

NO

NO NO

C125, C129resolder

TCX100Change or resolder

YES YES YES

NO

Check soldered status ofL102, L103, C112

YES

NO




3-27

3-2-2. DCS RX


AMP : -50dBm


YES

NO



U100 CheckPin#8,9 ≥ -65dBm ?





U100 CheckPin#35,36,37,38=100mV?


Check U838

NO

NO

YES

YES

YES

YES

NO

YES


Vpp : 1.1V?R113 = 26MHz ?

Vpp : 1.2V? R111 = 2.8V ?


NO

NO NO

C125, C129resolder


YES YES YES

NO

Check soldered status ofL104, L105

NO



3-28


3-2-3. PCS RX


AMP : -50dBm


YES

NO



UCP100 CheckPin#1,2 ≥ -65dBm ?





U100 CheckPin#35,36,37,38=100mV?


Check U838

NO

NO

YES

YES

YES

YES

NO

YES


Vpp : 1.1V?R113 = 26MHz ?

Vpp : 1.2V? R111 = 2.8V ?


NO

NO NO

C125, C129resolder


YES YES YES

NO

Check soldered status ofL106, L107

NO




3-29

VRF_2.8V

C125

R112

C126

C129

R113

R111

AFC

CLK26M

R108

VRF_2.8V

L102

L103

421C

C101

221C

TP

L104

C123

C117

BHXT

14D

NG

5850LNA_P

6900LNA_N

7900LNA_P

81800LNA_N

91800LNA_P

NO

MOL

43A

NEGI

DV

PI_XT|PI

53 63MI_XT|

MI

73M

Q_XT|M

Q

83P

Q_XT|P

Q

93BLXT

4850LNA_N

04

SXENA

27CHIPENA

28NC

29NC

3VPC

30NC

31NC

233

CCV

33

FU

BX|ZH

M62_ZH

M31

2TXENA

02E

NUTX

21XTAL

22VCC2

23DATAIN

24LATCHENABLE

25CLK

26

1900LNA_P

21A

NEXR

314

CCV

41NIF

RXT

51C P

AV61

PPM

OC

71NP

MO

C81

JD

AFPL

91

U100

1VCC1

101900LNA_N

11

L105

R121

C102

C112

C114

VBAT

311C

C103

701R

C105

L106

C108C107C106

L100

L107

C121

511C

TP

ANT

DPCS_OUTGSM_OUT

GSM_TX_ENDCS_TX_EN

CLK26M

VAPC

XOENA

13M_BUF

VPC

MOD_SELRTX_IPRTX_IN

RTX_QNRTX_QP GSM74137_OUT

DCS74137_OUT

TX_EN

SX_ENSERCLK

SERLESERDAT

RX_ENTX_FB

SAT_DET



3-30





3-31

3-2-4. EGSM TX

Continuous TX ON conditionTX Power Code : 500 code Applied

CH : 62RBW : 100KHzVBW : 100KHzSPAN : 10MHz

REF. Level : 10dBmATT. : 20dB

C120>= 3.7V?

Change PAM100

NO

YES

DUF100 Pin#13About 2~3 dBm?

DUF100Pin#11 = High?

U838Check & Change

NO

DUF100, C103Check & Change

YES

DUF100Check & Change

YES

Check theBattery Block

Level of PAM100Pin #6 is

1.2V?

CheckU838 TXP OK ?

U838Check & Change

YES

YES

NO

NO NO

NO

PAM100 pin#12About -5 dBm?

PAM100 pin#7High ? Check U838

YES

NO

YES

C106 ≥ 2.8V ?


Vpp : 1.1V?R113 = 26MHz ?

Vpp : 1.2V?R111 = 2.8V ?

NO

YES

NO

NO NO

C125, C129resolder


YES YES YES

NO

C105,107,108,U838Check or resolder

U100 Pin#34, = 2.8V?

YES

Change PAM100Check U838

NO

YES

Level ofDUF100 Pin#10 is

4~5dBm ?



3-32


3-2-5. DCS/PCS TX

NO U838Check & Change

DUF100Pin#9 = High?

DUF100 Pin#13About 2~3 dBm?

NO

YESYES

Level ofDUF100 Pin#8 is

4~5dBm ?NODUF100, C103

Check & Change Continuous TX ON conditionTX Power Code : 500 code Applied

CH : 698RBW : 100KHzVBW : 100KHzSPAN : 10MHz

REF. Level : 10dBmATT. : 20dB

YES

DUF100Check & Change

NO Check theBattery Block

C120>= 3.7V?

YES

NONO U838Check & Change

CheckU838 TXP OK ?

Level of PAM100Pin #6 is

1.2V?

YESYES

YES PAM100 pin#14About -5 dBm?

NO

NOCheck U838PAM100 pin#2

High ?

YES

Change PAM100

C105,107,108,U838Check or resolder

NOC106 ≥ 2.8V ?

YES

NONONOU100 CheckPin #21 : 26MHz ?

Vpp : 1.1V?R111 = 2.8V ?R113 = 26MHz ?

Vpp : 1.2V?

YESYESYES


C125, C129resolderNO U100 Pin

#34, = 2.8V?

YES

Check U838 Change PAM100




3-33

R101

R100

901R

021C

12

RSVD8

VBATT5

VPC6

4 VSUP

1

15GND

GND 9

GND 13

GND 11

10GND

GND17

7 GSMIN

GSM_OUT

PAM100

BS3

COUP_OUT 16

DCS|PCS_IN2

14DCS|PCS_OUT

ENA

811C

911C

VBAT

601R

011R

111C

611C

R102

R103 011C

L101

C109

501R

401R

C104TX_FB

BAND_SEL

SAT_DET

DPCS_OUT

PAC_EN

GSM_OUT

DCS74137_OUT

GSM74137_OUT

VPC

Samsung SGH-F300 Service Manual

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