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

Current consumption

>= 100mA

Yes

Check the Vbat Voltage

Voltage >=3.3V

Yes

Check the pin of UCP300

Pin#A6 : 1.8V Pin#D6 : 2.9V

Yes

Pin#M7 : 2.9V

Pin#L8,#P4 : 1.8V

Yes

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

Yes

No

Download again

Charge the Battery

Check UCP300

C343 and C344

Check UCP300

C300,C301,C303

Freq = 26MHz

Vrms >=300mV

Vpp≒900mV

Yes

Check the initial operation

END

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No

Check the clock generation circuit

(related to OSC100, Pin#9, Pin#10)

9-1

1

Flow Chart of Troubleshooting

RTX_I_P

RTX_Q_N

V

RTX_Q_P

9

8

.

2

1

_

VAPC

A

D

TXPSTB

C

V

C337

C342

C343

C344

J3 K3 K4

H5 L5

P13 P12 C10

A6 D6

E14 F12 D14

C15 B15 C12 D13

RXTXIP RXTXQN RXTXQP

TXP TXPSTB

USB_CARKIT_D_N USB_CARKIT_D_P USB_CHRG

VLDO_1 VLDO_2

VLDO_AUD VLDO_AUX1 VLDO_AUX2

VLDO_COREA VLDO_COREA_S VLDO_COREB VLDO_COREC

S S V

8

6

K

4

C 3 4 1

L300

C

3

9

7

3

4

Z D 6 0 0

C331

C

R

3

C343

0

3

0

6

5

1

D

B

D

S

N

S

G

V

G

1

9

1

K

N

C344

C

R

3

0

R300

5

2

TH300

C605

C 3 2 0

C307

C

C 3 4 2

C 3 3 2

C

R

C

4

3

2

1

3

5

7

5

6

0 0 3 P C U

C

3

2

0

1

8

9

C

R

C

3

4

3

0

2

8

7

5

T D

L

F 1 6 1

E 2 2 1 X A

G

C

3

0

2

3

4

0 8

C

R

C

4

3

1

4

3

5

1

2

VCCA_2.8V

VCCD_2.9V

C300

4

5

2

7

1

2

1

N

K

M

C

D

N

C

A

D

1

B

D

1

D

V

D

V

D V

3

0

1 C S O

4

CLK26M_BT

2

1

CLK26M_DBB

SBCK

SBDT

VCCD_1.8V

C301 C302 C303

0

5

1

5

4

8

1

L

P

K

L

P

N

L

V

D

R

B

O

I

T

D

K

D

_

C

D

P

D

O

V

S

V

D

A

D

V

_

D

V

D V

C117

C120

]

m

’

p

0

z

H

,

2

3

0

6

RFT100

FSYS3

7

FSYS2

8

VDD2

9

XO

10

1

3

S

XOX

D

K

Y

N

L

A

D

S

V

F

C

G

D

3

2

4

1

6

0 0 3 P C U

C

3

2

3

0

1

8

2

K

8

6

.

7

2

[

3

6

4

-

C

1

’

M

C 3

C

S

O

2 6

C

4

3

4

0

2

1

5

8

5

7

C

3

2

0

3

0

9

8

C

3

2

R

1

2

6

5

0 0

OSC100

CX3225SB-H2827

C 1 2 0

C 1 2 1

C204

C

3

0

2

7

C206

C O

C

R

3

E

0 0

T D

L

F 1 6 1

E 2 2 1 X A

G

R226

R

C

2

3

3 2 4

C 3 0 1

R227

0

1

3 V

R

2

1

0

4

1

C117

C 1 0 7

M

6

2

B

7

1

D X 1

2 2 A

-

C 5 A H 2 4 0 F

R

C

2

6

2

R225

0

2

1

0

2

0

C602 C603 C604

R

C

R

1

0

3

8

4

R102

P

U C D 2 0 0

V

C

R

2

0

8

9 V

R 6 0 1

6

0

1

0

7

2

9

3

V

R

C

R

2

6

0

1

0

2

0

6

C106 R107

T

1

0

R

F

9-2

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2

9-1-2. Initial

Flow Chart of Troubleshooting

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

Is the SIM_RST Pin #B5 of

UCP300 is "High"

-

Yes

?

No

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

Check the

UCP300

Yes

The voltage is "High" at the

C300,C301,C302,C303

Yes

LCD display is O.K

Yes

Sound is O.K

Yes

END

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No

9-3

Check the

UCP300

LCD

AUDIO

part

3

Flow Chart of Troubleshooting

CNTL_DAT_CSP

SIM_CLK

SIM_IO

SIM_RST

UP_CLK

UP_IO

UP_RST

VRFLDO_1 VRFLDO_2

VREF

CNTL_EN_CSP

HV_CHRG

BATKELV

CREF

FBSW

PSW1_BUF

RTC_CLK

SCUSTB

VACC VEXT VRTC

SCAN

SCANTST

RING_DRV

VIB_DRV

VIB_RNG_EN

SYSCLK

SYSCLKEN

RESETN

RESET_O

X1RTC X2RTC

VAMICREF VAMICRTN

VAREF

VAREFRTN

VAVCM VAVCMLSH VAVCMRTN

CSN_PSC

SCLK_PSC

SDI_PSC

SDO_PSC

B6 E6 B5

N5 L6 M6

E3 F3

F2

P1 N9

D10

G5

AFC

N7

AINT

B11

F1 L9

DINT

B12 B13

LX

D3

NC1

L10

R3 P3 C9

A12

F5 C5

VSIM

N4 K7 E8 E9 L7

N6 R6

R4 P5

G4 G3

K13 K10 K12 J11 L14 F13 K11

M10 P10 R10

M9

L300

SIM1_CLK SIM1_DATA SIM1_RST

CNTL_DAT_CSP CNTL_EN_CSP

AINT

DINT

PSW1_BUF RTC_CLK SCUSTB

MOTOR_EN VIB_RNG_EN

CLK26M_ABB CLK_REQ_ABB

FLASH_RST RST

VAMICREF

C325

C327

UP_CS UP_SCLK UP_SDI UP_SDO

SIM_CLK SIM_IO SIM_RST

C310

C307

VBAT

C320

C311

C328

VRF_2.9V

C308

DCDC_OUT

GND_SW

VSIM

23

VBAT

C321

41

C309

C315

OSC300

C326

VBAT

C 3 0

L300

C

3

7

9

Z D 6 0 0

C

R 3

3

0

1

6

R 3 0 2

C307

R304

T D

C

3

4

C331

C 3

C343

3 5

C344

C 3

R300

0 5

TH300

C 3 2

C605

0

]

’

z

H

,

6

K

2

p

m

7

8

0

p

[

3

6

.

2

0

3

C

S

O

0 0 3

P C U

C

C 3 2 8

C 3 2 6

C329

C 3 0 9

C 3 1 5

C500

3

2

1

-

’

C

M

1

4

0 0 3

Q

L

-

F 1 6 1

E 2 2 1 X A

G

C

3

2 3

0 8

C 3 2

R

2

6 0 0

0

R

C

2

3

0

2

1

3

4

V

C

R

3

2

0

1

0

4

1

9-4

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4

9-1-3. Sim Part

"Insert SIM is displayed on the LCD

Flow Chart of Troubleshooting

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

Check the

UCP300

SIM600

9-5

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5

Flow Chart of Troubleshooting

9-6

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This Document can not be used without Samsung's authorization

6