Samsung X670 Service Manual Trouble Shooting

7. Flow Chart of Troubleshooting

7-1. Power On

' Power On ' does not work

Yes

Check the Battery Voltage

is more than 3.4V

Yes

C408(VINT) = 2.7V?

Yes

Check the Clock at

R402=32KHZ

Yes

C425(+VDD_IO_LOW) &

C424(+VDD_IO_HIGH) = "H"?

Yes

C401(+VDD_GSM_CORE)

= 1.8V?

Yes

No

Change the Battery

No

Check the PMU related to VINT

No

Resolder OSC400

No

Check the related circuit

No

Check the +VDD_GSM_CORE circuit

Check for the clock at C312	No		Check the clock	generation circuit
= 26MHz			(related	to U100)

Yes

Check the initial operation

Yes

END

7-1

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Flow Chart of Troubleshooting

ONKEYN

C405

C406

R402

OSC400

C407

C408

Typical 3.7V

VBAT

R401

POS

BU_RST

V400

C411

BAT400

C409

C410

NEG

+VDD_RX_TX

C412

R404

+VDD_SLEEP

+VCC_SYN

25

26

27

28

29

30

31

32

33

34

35

36

C413

OCS O

ICS O

YEK ON

CFE R

TNI V

EVA SV

TAB V

GHC V

VRD GHC

XAM BAT/

DDV CP

TAB CVP

38

C414

SCP

37

24

RF2VDD

RU

SCN

R405

CG

D3VDD 39

+VDD_IO_LOW

23

+VDD_IMAGE

RF12VBAT

HC

SIMD3VBAT 40

22

RF1VDD

21

SIMVCC 41

SIM_VCC

SIM400

C415

D1VDD

SIMIOCD 42

SIM_IO

20

LPD1VBAT

SIMCKCD 43

SIM_CLK

1

6

19

LPVDD

U400

G G

G G

18

_SIMRSCD 44

SIM_RST

3

4

2

5

+AVDD

HCVBAT

SIMEN 45

10 9

8 7

17

HCVDD

GPO3 46

C416

16

D2VDD

GPO2 47

V401

15

IOD2VBAT

C418

C419

C420

C417

GPO1 48

C421

14

IOVDD

GND 49

+AVDD_HFA

13

_REC2

GND 50

SAI BMCI

CHO MSII

CHK MCSI

CHS RMSI

1NE WRP

2NE WRP

GND

51

CHTRS

QRI

K23KCL

ADS

CSL

1CRE

GND

52

NC

54

C422

NC

53

12

11

10

9

8

7

6

5

4

3

2

1

+VDD_IO_HIGH

TP400

AUX_ON

C423

SCL

C424

SDA

32KHz_DIGIT

+VDD_IO_LOW

PON_TX

REF_ON

C425

SIMRST

SIMCLK

R406

MIC_BIAS

+VDD_IO_HIGH

+VDD_IO_HIGH

RSTON

IT_PMU

U302

SIMIO

C312

R313

1

NC

VCC

5

26M_CLK

2

INA

R314

R315

3 GND OUTY 4

26M_DIGIT

7-2

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Flow Chart of Troubleshooting

7-2. Initial

Initial Failure

	Yes
Q300 pin 4 (RSTON) ="H"			No
					Check the circuit related to reset

Yes

Is UCP200 R214, R215

No

Check the UCP200

OK?

Yes

Check the 16bit data signal & memory CE

Yes

END

7-3

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Flow Chart of Troubleshooting

	RFSIG0	R13
		M12
	RFSIG1 M11
	RFSIG2
		V5
	GPIOA3
		P9
	GPIOA4	L11
	GPIOA5
		R11
	RFSIG6
		P11
	RFSIG7
		T2
	GPIOA21
		R2
	GPIOA22
	GPIOA23	R5
	RFCLK1	U18
		R17
	RFDO1
	GPIOA9	G1
	RFEN0	V18
	RESET H1
	MCLK V10
	AUXDAC1	R9
		R8
	AUXDAC2
		V11
	AUXDAC3
		U14		C217
	VREF
		V12
	MICBIAS
	QN	V8
UCP200	QP	V7
		U8
	IN
		U7
	IP
		J1
	AUXADC1
	AUXADC2	K1
		K2
	AUXADC3
	AUXADC4	L1
		L2
	AUXADC5

MODE_SELECT PON_SW PON_PA

IT_PMU

M_INT

BT_INT

PON_TX PON_3587_SYNTH EXT2

DCS

KEY_LED_ON

RF_CLK	R205	R203
RF_DATA

CLKBURST	100K
RF_EN
RSTEXTn

D_REF_CLK

EDGE1_PA

AFC

RAMP

MIC_BIAS_BB

RX_TX_QN

RX_TX_QP

RX_TX_IN

RX_TX_IP

MES_BATT

VF

TEMP_PRODUCT

EAR_ADC

HFR1	J17		HFR_P
	H18
HFR2	K15	R207	HFR_N
EAR1	J15	R208	EAR1
EAR2			EAR2
MICN M18			MIC_N
MICP	N18		MIC_P
AUXMICN	L17
AUXMICP	M17
	K18			C222
ANL	L18				ANL	+VDD_IO_HIGH
ANR				C223	ANR
	D13
FSC			FSC
	E11			+VDD_IO_LOW
DCL	B13		DCL R213		DAI & Bluetooth data Interface
DD	B14		DD
DU			DU
GPIOA24	N1
			R_CONTROL
	T1					R214	R215
GPIOA25	L9		MELODY_SEL
GPIOA26			JACK_EN
SCL	U17
SDA M14
GPIOA30	P8		AUX_ON
GPIOA27	P6		END_OF_CHG
	R6
GPIOA28			AUDIO_SW
SIMCLK	G17		SIMCLK
SIMIO	D15		SIMIO
	N14
SIMPWR	F17
SIMRST			SIMRST
	V2
GPIOA17	V3		EXT1
GPIOA29	V4		CHG_ON
GPIOA31
USBCN	F14		USBCN
	G14
USBDM	H11		USBDM		USB Interface
USBDP			USBDP
			+VDD_IO_LOW		+VDD_IMAGE
	+VDD_IO_HIGH	+VDD_IO_LOW
					R307
	R309		Q300
	LCD_RESET	3	4		RSTON
			5
		2
	S_RST	1	6		S_RST_IMAGE

SCL SDA

LEVEL SHIFT

7-4

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Flow Chart of Troubleshooting

7-5

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Flow Chart of Troubleshooting

7-3. Charging Part

Abnormal charging part

Yes

Check the U502 pin 1 > 4.9V

Yes

U502 pin 5 = "L"?

Yes

U502 pin 3 = "L"?

Yes

Check the U502 pin 104.2V

Yes

END

No

No

No

No

Check the circuit related to

V_EXT_CHARGE

Resolder or replace U502

Check the circuit related to

AUX_ON signal

Resolder or replace U502

7-6

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Flow Chart of Troubleshooting

						Typical 3.7V
						VBAT
V_EXT_CHARGE			+VDD_IO_HIGH			R510		Typical 1.4V
								MES_BATT
C503	C504	ZD501	R511			ZD500
				U502				C505
							R512
			1	CRDL	BAT 10
5.0V			2	USB	ICDL 9
+VBUS
AUX_ON			3	_PPR	GND 8
END_OF_CHG			4	_CHG	USBON 7			USB_CHG_ON
CHG_ON			5	_EN	IMIN 6
				GND
				11
			C506		R515	R514

BATTERY CHARGING

7-7

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Flow Chart of Troubleshooting

7-4. Sim Part

Phone can't access SIM Card

Yes

SIM400 pin 1,5 = "H"?

Yes

After Power ON, Check SIMCLK Signal on pin3 of SIM400 in a few

Yes

After SIM card insert,

SIM400 pin 2 = "H(SIM_RST)"?

Yes

Check the SIM Card

Yes

END

No

Check the sim charge pump

No

Check the Clock

No

Replace PBA

7-8

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Flow Chart of Troubleshooting

C406

C408

BU_RST

R401 POS

BAT400 C409

NEG

+VDD_SLEEP

28

29

30

31

32

33

34

35

36

C413

CFE R

TNVI

EVA SV

TAB V

GHC V

VRD GHC

XAM TABR/

DDV PC

TAB VCP

SCN

38

SCP

37

UC

R405

39

G

D3VDD

+VDD_IO_LOW

H

C

SIMD3VBAT 40

SIMVCC 41

SIM_VCC

SIM400

SIMIOCD 42

SIM_IO

U400

SIMCKCD 43

SIM_CLK

1

6

2

5

_SIMRSCD 44

SIM_RST

3

4

G G G G

SIMEN 45

10 9

8

7

GPO3 46

GPO2 47

V401

C418

C419

C420

C417

GPO1 48

C421

GND 49

								GND 50
CHK CMI S	CHS RMI S	1NE RWP	2NE RWP					GND 51
				K23 KLC			1CE R	GND 52
					ADS	LCS		NC 53
								NC 54
8	7	6	5	4	3	2	1
								TP400

AUX_ON

SCL

SDA 32KHz_DIGIT PON_TX REF_ON SIMRST SIMCLK

7-9

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Flow Chart of Troubleshooting

7-5. Microphone Part

Microphone does not work

Yes

Check the connection

from MIC

Yes

Check the circuit

from UCP200 to MIC

Yes

Check R605, R625

= ' H' ?

Yes

Check the MIC

Yes

END

No

Resolder MIC

No

Resolder the C603, C606, R601, R603, R604

L600, L601, U600

No

Check the JACK_IN, JACK_EN signal

No

Replace the MIC

7-10

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Flow Chart of Troubleshooting

Close to MCP MIC_BIAS

MIC_BIAS_BB

MICROPHONE

C607

MIC_BIAS

C600

R600

R601

C602

C603

L600

Close to microphone

MIC_P

C605

U600

MIC600

10

1

2

3

C606

R602

C604

CCV

1ON

L601

NO2

COM1

MIC_N

9

COM2

4

R603

C601

IN1

8

IN2

5

C608

NC1

DNG

D602

D603

CN

R604

R605

6

7

JACK_EN

R606

R607

EARPIECE

EAR_SWITCH

EAR600

+VDD_IO_HIGH

11

R_ANT

C611

C612

2

2

33

L606

4

4

EARSPK_L

55

L607

R611

R612

HFR_N

6

6

L608

15 G

EARSPK_R

R625

77

8

16 G

8

JACK_IN

17 G

99

EAR_ADC

18 G

10

10

G G G G

14 13 12 11

6

C616

5

4

L603

C615

C617

D600

D601

1

2

3

ZD601

Typical 3.7V

PK PS

PP MA

VBAT

RFA

7-11

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