Samsung SGH-B5702 TSHOO

10. Flow Chart of Troubleshooting

10-1.Baseband

10-1-1. Power ON

'Power On' does not work

Check the current consumption

Yes

		Current consumption					No
		>= 100mA
			Yes
		Check the Vbat Voltage
							No
		Voltage >=3.4V
			Yes
		Check the pin of U300
							No
		C329(VISA)= 2.5V?
			Yes
		L1(VDD_GSM_CORE)					No
		=1.2V?
					Yes
			Yes

Check the clock signal at OSC of MAX8699

Check the clock	No
Freq = 32.768kHz

Yes

Check the initial operation

END

Download again

Charge the Battery

Check U300

C329

Check U300

C343

Check the clock generation circuit (related to OSC300, C331, C334)

10-1

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Flow Chart of Troubleshooting

+VDD_MAINKEY_3.3V

C300

+AVDD_HFA_2.6V

C353

+VDD_SUBKEY_LED_3.3V

C310

+VDD_SLEEP_2.9V

C312

+VDD_IO_HIGH_2.9V

C314

+VDD_USB_3.3V

C316

VBAT

R303

MES_BATT

C356

R304

C319

V_EXT_CHARGE

HFR_P

C322

C323

HFR_N

C324

EAR1_M

C325

EAR2_M

C326

SPK_N

SPK_P

C331

REF_ON_PMU

PWREN2

OSC300

C340

C341

C342

53

45

73

83

C334

3C

3C

3C

3C

+VDD_SD_3.3V

C301

									+VDD_IO_LOW_1.8V
							C303
									+VDD_PLL_1.2V
							C311
									+AVDD_2.6V
							C313
									+VCC_SYN_2.8V
							C315
									+VDD_RX_TX_2.8V
				SUB			C317
				V+
								AUX_ON
								JACK_IN

							R307	MIC_BIAS_2.15V
	11 9E 8D 1C 2B 2D 11 11 9A 3A 1E 5C 5A 7A 6B 21 E C A D
	IN1	TTAB BTABT STABT DDDV1 DDDV2 DDDV3 DDDV4 DDDV5 DDDV6 DDCHV DDOVI DDCVL DDVPL DDRVF1 2DDRVF		REC1B						EARSPK_R
				S					R310
M2				UBV	G3				R311	EARSPK_L
C3	IN2			REC2B	G7				R312
B4
B10	IN3			HPL	M4				SIMOFFn
B8	IN4				L3				+SIMVCC_M
	IN5			HPR
K6						C321
	IN6							C355
K12				MICBIAS	F2
L5	IN7
	IN8
M10					H10
	IN9			RXINN		HFR_N
J5				RXINP	K10	HFR_P
	INA1
H6					F4
	INA2		SIMOFFB
					C7
				SIMVCC
J7
	INB1
H8	INB2			USBLDO	B12	+VBUS_DETECT
K8	C1N	U300		VL	D10	C327
L9					K4	C328
	C1P			VBIAS
					G1	C329
H12				VISA	E3
L11	OUTN			VSAVE
	OUTP			CLK32K	H4			32KHz_DIGIT
F12										BAT300
	CHGIN				D4
F10	CHGINB			IRQB		TP_PMU_INT_M		PMU_INT_M	C330
H2	XIN			SCL	E7			SCL
J1					D6
	XOUT			SDA				SDA
				LX	L1
C9					J3
	PWREN1			FB		C332
E5					F8
	PWREN2			REFBP
					F6			ONKEY_N
				ONKEYB
G9	TEST1			RESETB	G5			RSTON
J9
	TEST2
		DGNA GND 1DGNP 2DGNP 3DGNP SVS	CN CN						L301	+VDD_GSM_CORE_1.2V
		6M 11 2K 8M 11 7L G J	1 2						R314
									C339	C343
		C333
									R315

PMU + DCDC + CHARGER

C354

3C	3R	3R
93	51	41

L301

C343

	3C	3C	C322
	52	42
			C323
	C333		C326

C335

12C	12C
8	1

R223

923C

OSC300

R307

C321

103C

C334

C331

303C

613C

413C

213C

C338

C313

C311

C315

C317

U

C300

C355

003

353C

C332

C327

733C

R303

143C

043C

C342

212C

C319

10-2

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Flow Chart of Troubleshooting

10-1-2. Initial

Initial Failure

Yes

Is the RST Pin#G5(RSTON) of

U300 "Low → High" ?

Yes

The Pin #E11,E9,D8(VBAT)

of U300 >= 3.4V

Yes

There is 32.768kHz waveforms at the C331 and C334 of OSC300

Yes

The voltage is "High" at the

C314, C303

Yes

LCD display is O.K

Yes

Sound is O.K

Yes

END

No	(if it has	Check the U300
		some problems, replace it.)

No	(if it	Check the U300
		has some problems, replace it.)

No

Check the U300

No

Check the U300

No

Check the LCD part

No

Check the AUDIO part

10-3

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Flow Chart of Troubleshooting

+VDD_MAINKEY_3.3V

C300

+AVDD_HFA_2.6V

C353

+VDD_SUBKEY_LED_3.3V

C310

+VDD_SLEEP_2.9V

C312

+VDD_IO_HIGH_2.9V

C314

+VDD_USB_3.3V

C316

VBAT

R303

MES_BATT

C356

R304

C319

V_EXT_CHARGE

HFR_P

C322

C323

HFR_N

EAR1_M

C324

C325

EAR2_M

C326

SPK_N

SPK_P

C331

REF_ON_PMU

PWREN2

OSC300

C340

C341

C342

53

45

73

83

C334

C3

C3

C3

C3

+VDD_SD_3.3V

C301

+VDD_IO_LOW_1.8V

C303

+VDD_PLL_1.2V

C311

+AVDD_2.6V

C313

+VCC_SYN_2.8V

C315

				+VDD_RX_TX_2.8V
SUBV+		C317
			AUX_ON
			JACK_IN

R307

MIC_BIAS_2.15V

11 9E 8D 1C 2B 2D 11 11 9A 3A 1E 5C 5A 7A 6B 21 E C A D

IN1

TTAB BTABT STABT DDDV1 DDDV2 DDDV3 DDDV4 DDDV5 DDV6D DDHCV DDVOI DDCVL DDVPL DDRVF1

2DDRVF

REC1B

R310

EARSPK_R

M2

SUBV

G3

R311

EARSPK_L

C3

IN2

REC2B

G7

R312

B4

B10

IN3

HPL

M4

SIMOFFn

B8

IN4

L3

+SIMVCC_M

K6

IN5

HPR

C321

IN6

C355

K12

MICBIAS

F2

L5

IN7

IN8

M10

H10

IN9

RXINN

HFR_N

J5

RXINP

K10

HFR_P

INA1

H6

INA2

SIMOFFB

F4

C7

SIMVCC

J7

INB1

H8

B12

INB2

USBLDO

+VBUS_DETECT

K8

C1N

U300

VL

D10

C327

L9

K4

C328

C1P

VBIAS

G1

C329

VISA

H12

E3

OUTN

VSAVE

L11

OUTP

CLK32K

H4

32KHz_DIGIT

F12

BAT300

CHGIN

D4

F10

CHGINB

IRQB

TP_PMU_INT_M

PMU_INT_M

C330

H2

XIN

SCL

E7

SCL

J1

D6

XOUT

SDA

SDA

L1

LX

C9

J3

PWREN1

FB

C332

E5

F8

PWREN2

REFBP

F6

ONKEY_N

ONKEYB

G9

G5

TEST1

RESETB

RSTON

J9

TEST2

1 2 3

DGNA DGN DGNP DGNP DGNP SSV

CN NC

L301

+VDD_GSM_CORE_1.2V

6M 11 2K 8M 11 7L G J

1 2

R314

C339

C343

C333

R315

PMU + DCDC + CHARGER

C354

33C	13R	13R
9	5	4

L301

C343

	523C		423C		C322
					C323
	C333				C326
			C335
					2C		2C
					81		11

R223

923C

OSC300

R307

C321

103C

C334

C331

303C

613C

413C

213C

C338

C313

C311

C315

C317

003U

C300

C355

353C

C332

C327

733C

R303

143C

043C

C342

212C

C319

10-4

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Flow Chart of Troubleshooting

10-1-3. Sim Part

(1) MASTER

"Insert SIM is displayed on the LCD

Yes

No

SIM200 #1 = H ?		Resolder or change UCP200

		Yes
	After Power On,			No
	Check SIMCLK Signal On						Check the clock
	#3 of SIM200 in a few
	second
		Yes		No
	After SIM Card insert,
							Replace PBA
	SIM200 #2 = "H"

Yes

Check the SIM Card

END

SIMIO_M SIM_IO_1

SIMIO_S

SIM_SEL

SIMCLK_M

SIM_CLK_1

SIMCLK_S

							14
		16			15		13
		MAO			OAN		CCV DCN
	1	C									COMD 12
		NCA
2		A-B_IN									NOD11
3		NOB									C-D_IN 10
4		COMB							C NCC 9
		CBN DNG					CON		MOC
		5					7		8
					6

+VDD_USB_3.3V

R200

C200

+SIMVCC_S

+SIM_VCC_1

+SIMVCC_M

SIMRST_S

SIM_RST_1

SIMRST_M

U200

SIM SELECT [MASTER]

C216

512C

SIM200

C214

10-5

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Flow Chart of Troubleshooting

(2) SLAVE

"Insert SIM is displayed on the LCD

Yes

No

SIM800 #1 = H ?		Resolder or change UCP200

Yes

After Power On,

Check SIMCLK Signal On

#3 of SIM800 in a few

second

Yes

After SIM Card insert, SIM800 #2 = "H"

Yes

Check the SIM Card

END

SIMIO_S SIM_IO_2

SIMIO_M

SIM_SEL

SIMCLK_S

SIM_CLK_2

SIMCLK_M

	16		15
		AMO	AON
1	NCA	C
2	A-B_IN
3	NOB
4	COMB
		BCN
		5
			6
			DNG

+VDD_USB_3.3V

R205

C217

CCV
14
13
	DCN
		COMD 12
			NOD11
		C-D_IN 10
	CMO C		NCC 9
CON			U201
7	8

+SIMVCC_M

+SIM_VCC_2

+SIMVCC_S

SIMRST_M

SIM_RST_2

SIMRST_S

SIM SELECT [SLAVE]

No

Check the clock

No

Replace PBA

SIM800

10-6

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505DZ

4U 10

4U 00

914C 314R 514R 024C

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

10-1-4. Microphone Part

Microphone does not work

Yes

Is the	Microphone	No		Reassemble the microphone
assembled correctly?

Yes

Check the reference voltage on mic path

Check the connection MIC					No			Resolder or replace
								MIC400
		Yes			No
	MIC_BIAS = 2.15V?							Check U300
		Yes
Check mic-path connection
								Resolder C400,C405,C411
		Yes
	END

10-7

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Flow Chart of Troubleshooting

					MIC_BIAS_2.15V
	ZD400
	C400
				TA401	R400
	L400					C402
		MIC_IN_P
	C405
			MIC_SEL_P_M		C403	MIC_P_M
MIC400
	L402	MIC_IN_N			R402	C407
	ZD401
	C411				C408
			MIC_SEL_N_M			MIC_N_M
					R424
						C413

MICROPHONE

MIC_BIAS_2.15V

		R415
MIC_SEL_N											MIC_SEL
EARMIC_N
		01			9		8
			1S2		2D		2LE S
			1 VCC		U401			2S2 7			MIC_IN_N
EARMIC_P			2 1S1					GND 6
					1LE S
			1D				2S1
		3			4		5

MIC_SEL_P

MIC_IN_P

C420

R423

MIC_BIAS_2.15V

R413

MIC_SEL_N

MIC_PATH_SEL

MIC_SEL_N_M

01

9

8

1S2

2D

2LE

1 VCC

S

7

U400

2S2

MIC_SEL_N_S

MIC_SEL_P_M

2 1S1

GND 6

1LE S

1D

2S1

3

4

5

MIC_SEL_P

MIC_SEL_P_S

C419

C400 C405 C411

L400	L402
ZD400ZD401

MIC400

	TA401				TP_PMU_INT_M
R423
			004R		204C
R424
					704C
	C403		204R
	C408

C413

C209

C213

707R		607R	107R	017C	517C

		R406
					414C
		R404
002PCU		C412		304R	904C
		C406
		R401			404C	UCP700
		TA400
					007C
			R702

R212

R211

Master MIC path Slave MIC path

10-8

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Flow Chart of Troubleshooting

10-1-5. Receiver/Speaker Part

There is no sound from the Receiver/Speaker

Yes

No

Is the terminal of

Receiver/Speaker O.K ?

	Yes
Is there any signals at the				No
Pin#1 and Pin#2 of
SPK_PAD?
	Yes
Is there any signals at the				No
Pin#1 and Pin#2 of
SPK_PAD
	Yes
Is there any signals at the				No
H12,L11(SPK), M4,L3(RCV)
of U300
	Yes
Is there any signals at the				No
J7,H8(SPK), J5,H6(RCV) of
U300
	Yes
END

Replace the Speaker

Check SPK_PAD

Check HDC500 #55, #57

Check U300(Audio AMP)

Check UCP200 (Master RCV)

UCP700 (Slave RCV)

UCP (SPK)

10-9

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Flow Chart of Troubleshooting

KEY_COL(4)			49	49
			51	51	52
KEY_COL(3)
			53	53	54
SPK_P			55	55	56
			57	57	58
SPK_N
			59	59

HDC500

C513

+VDD_MAINKEY_3.3V

C300

+AVDD_HFA_2.6V

C353

+VDD_SUBKEY_LED_3.3V

C310

+VDD_SLEEP_2.9V

C312

+VDD_IO_HIGH_2.9V

C314

+VDD_USB_3.3V

C316

VBAT

R303

MES_BATT

C356	R304

C319

V_EXT_CHARGE

HFR_P

C322

C323

HFR_N

EAR1_M

C324

C325

EAR2_M

C326

SPK_N

SPK_P

C331

REF_ON_PMU

PWREN2

OSC300

C340

C341

C342

453

833

533

733

C334

C

C

C

C

+VDD_SD_3.3V

C301

									+VDD_IO_LOW_1.8V
							C303
									+VDD_PLL_1.2V
							C311
									+AVDD_2.6V
							C313
									+VCC_SYN_2.8V
							C315
									+VDD_RX_TX_2.8V
				SU			C317
				B
				V+
								AUX_ON
								JACK_IN

								R307	MIC_BIAS_2.15V
	11 9E 8D 1C 2B 2D 11 11 9A 3A 1E 5C 5A 7A 6B 21 E C A D
	IN1	TTAB BTBAT STBAT DDDV1 DDDV2 DDDV3 DDDV4 DDDV5 DDDV6 DDHCV DDOVI DDCVL DDVPL DDRVF1 2DRDVF			REC1B						EARSPK_R
					SU					R310
M2					BV	G3				R311	EARSPK_L
C3	IN2				REC2B	G7				R312
B4
B10	IN3				HPL	M4				SIMOFFn
B8	IN4					L3				+SIMVCC_M
	IN5				HPR
K6							C321
	IN6								C355
K12					MICBIAS	F2
L5	IN7
	IN8
M10	IN9				RXINN	H10	HFR_N
					RXINP	K10	HFR_P
J5	INA1
H6						F4
	INA2			SIMOFFB
						C7
					SIMVCC
J7
	INB1
H8						B12	+VBUS_DETECT
	INB2				USBLDO
K8	C1N		U300		VL	D10	C327
L9						K4	C328
	C1P				VBIAS
						G1	C329
					VISA
H12						E3
	OUTN				VSAVE
L11	OUTP
					CLK32K	H4			32KHz_DIGIT
F12											BAT300
	CHGIN					D4
F10	CHGINB				IRQB		TP_PMU_INT_M		PMU_INT_M	C330
H2	XIN				SCL	E7			SCL
J1						D6
	XOUT				SDA				SDA
						L1
					LX
C9						J3
	PWREN1				FB		C332
E5						F8
	PWREN2				REFBP
					ONKEYB	F6			ONKEY_N
G9						G5
	TEST1				RESETB				RSTON
J9
	TEST2		1 2 3
			DNG DNG DNG DNG DNG SS A P P P V	CN CN						L301	+VDD_GSM_CORE_1.2V
			6M 11 2K 8M 11 7L G J	1 2						R314
										C339	C343
			C333
										R315

PMU + DCDC + CHARGER

10-10

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