Samsung B220 Troubleshooting

9. Flow Chart of Troubleshooting

9-1.Baseband

9-1-1. Power ON

'Power On' does not work

Check the current consumption

	Yes		No
Current consumption
>= 100mA

Yes

Check the Vbat Voltage

No

Voltage >=3.3V

Yes

Check the pin of UCP300

Pin#A6 : 1.8V		No
Pin#D6 : 2.9V
	Yes
Pin#M7 : 2.9V		No
Pin#L8,#P4 : 1.8V		Yes
	Yes

Check the clock signal at Pin#12(C120) of RFT100

Download again

Charge the Battery

Check UCP300

C343 and C344

Check UCP300

C300,C301,C303

Freq = 26MHz	No		Check the clock generation circuit
Vrms >=300mV
			(related to OSC100, Pin#9, Pin#10)
Vpp 900mV

Yes

Check the initial operation

END

9-1

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1

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Flow Chart of Troubleshooting

RTX_I_P

J3

RXTXIP

K3

RTX_Q_N

K4

RXTXQN

8

9

8

RTX_Q_P

V

V

V

RXTXQP

. . .

2

2

1

VAPC

H5

AC

DC

DC

L5

TXP

TXPSTB

TXPSTB

CV

CV

CV

P13

USB_CARKIT_D_N

P12

USB_CARKIT_D_P

C10

USB_CHRG

A6

VLDO_1

D6

VLDO_2

E14

VLDO_AUD

F12

VLDO_AUX1

D14

VLDO_AUX2

C15

VLDO_COREA

B15

VLDO_COREA_S

C12

VLDO_COREB

D13

VLDO_COREC

SSV

SSV

SSV

BDN G

DDN G

C337

C342

C343

C344

6K

8K

9K

1K

11N

VCCD_2.9V VCCA_2.8V VCCD_1.8V

C300

C301

C302

C303

7M

1N

21N

41C

51D

2K

01N

51P

11L

5K

8L

4P

DDV

DDV

DDV

A1D DV

CB1 DDV

BDD V

DDD V

RKP SDD V

VDD V

LTC OA DDV

ODI DV

ODI DV

		4				3C	3C	3C	4R	4C	4C	4R	3C	3C	3C
						14	24	36	15	52	71	80	52	72	20

L300

TDL -F1

733C

933C

33C

33C

0

3

4

03P CU

61-E 2XA21-

103R

603C

533C

C344

D Z

0 0 6

C331

C343

G

3R

3C

R300

20

50

TH300

C307

233C

123C

823C

903C

803C

323C

423C

303C

C605

C032

C204

3C

3C

3C

4R

4C

4C

4R

3C

3C

3C

14

24

63

51

52

71

80

52

72

20

C206

F042HA5CA221-XD

003C

EROC

003PCU

TDFEXAL162112---

002DCU

R226

G

323C

423C

303C

102R

002R

306RV

023C

233C

123C

823C

903C

803C

222R

012C

106C

802C

902C

702C

212R

902R

R227

R225

CM’-’]mpp02,zHK867.23[641

623C

513C

06R

223C

103C

102RV

412R

106RV

006C

606RV

202R

012R

003CSO

C602

C603

C604

0

3		2
00
1C
SO
4		1

				6		FSYS3
CLK26M_BT		C117		7		FSYS2
				8
						VDD2
				9
						XO
				10
						XOX

C120

CLK26M_DBB

SBCK

SBDT

RFT100

GFVCD NYSDDKLA D 1S3

11213141

121C 021C

OSC100
		C117
		1C	1R		1C			1R
CX3225SB-H2827		70	30		80			40
1726BMP							R102
							C106
							R107
001TFR

9-2

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Flow Chart of Troubleshooting

9-1-2. Initial

Initial Failure

Yes

The Pin#A6 of UCP300 =

1.8V and

the Pin#D6 of UCP300 =

2.9V ?

Yes

Is the RST Pin#P5 of

UCP300 "Low → High" ?

Yes

There is 32.768kHz wave- forms at the C326 and C328 of OSC300

Yes

Is the SIM_RST Pin #B5 of

UCP300 is "High" ?

Yes

The voltage is "High" at the C300,C301,C302,C303

Yes

LCD display is O.K

Yes

Sound is O.K

Yes

END

No

Check the UCP300

(if it has some problem, it is to be replaced.)

No

Check the UCP300

(if it has some problem, it is to be replaced.)

No

Check the UCP300

No

Check the UCP300

No

Check the UCP300

No

Check the LCD part

No

Check the AUDIO part

9-3

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Flow Chart of Troubleshooting

B6

SIM_CLK

E6

SIM_IO

B5

SIM_RST

N5

UP_CLK

L6

UP_IO

M6

UP_RST

E3

VRFLDO_1

F3

VRFLDO_2

F2

VREF

P1

CNTL_DAT_CSP

N9

CNTL_EN_CSP

SIM_CLK
SIM_IO
SIM_RST
SIM1_CLK	VRF_2.9V
SIM1_DATA
SIM1_RST

CNTL_DAT_CSP C307 C308 C309 CNTL_EN_CSP

HV_CHRG	D10
	G5
AFC
	N7
AINT			AINT
	B11
BATKELV						VBAT
	F1
CREF
	L9
DINT			DINT								C315
	B12
FBSW
	B13
LX							DCDC_OUT
	D3	L300
NC1
	L10
PSW1_BUF			PSW1_BUF
	R3					C311
RTC_CLK	P3		RTC_CLK	C310
SCUSTB			SCUSTB
	C9
VACC	A12
VEXT							GND_SW
	F5
VRTC
	C5
VSIM							VSIM
	N4
SCAN
	K7					C320
SCANTST
	E8
RING_DRV
	E9
VIB_DRV			MOTOR_EN
	L7
VIB_RNG_EN
			VIB_RNG_EN
SYSCLK	N6		CLK26M_ABB							C321
	R6
SYSCLKEN
			CLK_REQ_ABB
RESETN	R4		FLASH_RST
	P5
RESET_O			RST
X1RTC	G4
	G3
X2RTC
VAMICREF	K13		VAMICREF					1		4
	K10										OSC300
VAMICRTN	K12
VAREF
	J11
VAREFRTN			C325
	L14
VAVCM						C328
	F13										C326
VAVCMLSH
	K11
VAVCMRTN			C327					2		3
CSN_PSC	M10		UP_CS
	P10
SCLK_PSC
	R10		UP_SCLK					VBAT			VBAT
SDI_PSC			UP_SDI
	M9
SDO_PSC			UP_SDO
	L300							TDL -F1			003C
733C	933C	33C	33C	0
		3	4	03P CU				61-E 221 XA
	006DZ	C331
103R	603C	533C	C343
			C344
								-G
	3R	3C	R300
	20	50
			TH300
	C307		C605	123C	823C	903C	803C	323C	423C	303C	102R
			2C33 0C32
		CM’-’]mpp02,zHK867.23[641			623C	513C		223C	103C	102RV	412R
			003CSO				06R
							0
R304			0
			0			C500
			3		C329
			Q
					9-4

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Flow Chart of Troubleshooting

9-1-3. Sim Part

"Insert SIM is displayed on the LCD

Yes

Check the SIM connector's (SIM600) connection to SIM card

Yes

Check the voltage at Pin#1 of SIM600 >= 2.9V ?

Yes

Is there any signals

Pin#13,#15,#16 of SIM600 ?

Yes

Check the SIM Card

END

No

Resolder or change SIM600

No

Check the UCP300

No

Check the UCP300

9-5

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Flow Chart of Troubleshooting

9-6

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