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

No

No

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

SAMSUNG Proprietary-Contents may change without notice

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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

V

V

RTX_Q_P

9

8

8

.

.

.

2

2

1

_

_

_

VAPC

A

D

D

TXPSTB

C

C

C

C

C

C

V

V

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

K

4

C
3
4
1

L300

C

C

C

C

3

3

3

3

3

3

9

7

3

3

3

4

Z
D
6
0
0

C331

C

C

R

3

3

3

C343

0

3

0

6

5

1

D

B

D

D

S

S

N

N

S

S

G

V

V

G

1

9

1

1

K

K

N

C344

C

R

3

3

0

0

R300

5

2

TH300

C605

C
3
2
0

C307

C

C
3
4
2

C
3
3
2

C

R

C

4

4

4

3

2

1

1

3

5

7

5

6

0
0
3
P
C
U

C

C

C

3

3

3

2

2

0

1

8

9

C

R

C

C

3

4

3

3

0

0

2

2

2

8

7

5

T
D

L

­F
1
6
1

­E
2
2
1
X
A

­G

C

C

C

C

3

3

3

3

0

2

2

3

3

4

0
8

C

R

R

C

C

C

4

3

3

3

1

4

4

3

5

1

2

VCCA_2.8V

VCCD_2.9V

C300

4

5

2

7

1

2

1

1

1

N

K

M

C

D

N

C

A

D

D

D

1

B

D

D

D

1

D

V

V

V

D

D

V

D
V

3

0

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

1

1

L

P

K

L

P

N

L

V

D

R

B

O

O

I

I

T

D

D

K

D

_

_

C

D

P

D

D

D

D

O

V

S

V

V

D

D

A

D

V

V

_

D

D

V

D
V

C117

C120

]

m

’

p

p

0

z

H

,

2

3

0

0

6

RFT100

FSYS3

7

FSYS2

8

VDD2

9

XO

10

1

3

S

XOX

D

D

K

Y

N

L

A

D

S

V

F

C

G

D

3

2

4

1

1

1

1

1

6

0
0
3
P
C
U

C

C

C

C

3

3

3

3

2

2

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

C

4

4

3

4

0

2

2

1

5

8

5

7

C

C

C

3

3

3

2

0

3

0

9

8

C

C

3

3

2

R

1

2

6

5

0
0

OSC100

CX3225SB-H2827

C
1
2
0

C
1
2
1

C204

C

C

3

3

0

2

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

C

2

3

3
2
4

C
3
0
1

R227

0

0

1

3
V

R

R

2

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

R

C

C

2

2

6

2

R225

0

0

2

1

1

0

2

0

C602 C603 C604

R

C

R

1

1

1

0

0

0

3

8

4

R102

P

U
C
D
2
0
0

V

C

C

C

R

R

R

2

2

2

2

2

0

0

8

9
V

R
6
0
1

6

0

1

0

0

7

2

9

3

V

R

R

C

R

2

2

6

6

0

1

0

0

2

0

0

6

C106
R107

T

1

0

0

R

F

9-2

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This Document can not be used without Samsung's authorization

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

No

No

No

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

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

Check the

Check the

Check the

Check the

UCP300

UCP300

UCP300

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

No

No

9-3

Check the

Check the

Check the

UCP300

LCD

AUDIO

part

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

C

3

3

3

3

7

9

Z
D
6
0
0

C

R
3

3

0

0

1

6

R
3
0
2

C307

R304

T
D

C

C

3

3

3

3

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

0

3

C

S

O

0
0
3

P
C
U

C

C

C
3
2
8

C
3
2
6

C329

C
3
0
9

C
3
1
5

C500

3

3

3

2

2

1

-

’

C

M

1

4

0
0
3

Q

L

-

F
1
6
1

­E
2
2
1
X
A

­G

C

C

3

3

2
3

0
8

C
3
2

R

2

6
0
0

0

R

C

C

2

3

3

0

0

2

1

3

4

V

C

R

R

3

2

2

0

1

0

4

1

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

No

No

Resolder or change

Check the

Check the

UCP300

UCP300

SIM600

9-5

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5

Flow Chart of Troubleshooting

9-6

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

6

9-1-4. Microphone Part

Microphone does not work

Flow Chart of Troubleshooting

Yes

Is the assembled status of

microphone O.K?

No

Yes

Check the reference voltage on mic path

Yes

R407≒2.4V ?

No

Yes

No

Is microphone ok?

Yes

END

C413

C419

C414

C418

C415

R410

R408

C417

MONO1_IN_N MIC-

Reassembled the microphone

Resolder or change

R406,R407,C416

Check

UCP300

R406

MIC+MONO1_IN_P

R407

C416

VAMICREF

MIC+

MIC-

L403

L404

C433C432

M

I

C

4

0

0

R

V

4

V

0

0

R

1

4

0

4

0

4

L

0

3

L

4

3

3

4

4

3

2

C

C

1

0

5

A

T

VR400

2

2

6

R

0
0
3
C

0

C

6

2

0

C

4

2

3
1
2
R

3
0
2
C

MIC400

VR401

G

-

A
X
1
2
2
E

-

1
6
1
F

-

L
D

T

5

7

2

2

2

0

3

3

3

C

C

C

8

3

4

1

1

1

4

4

4

C

C

C

7

0

0

R

6

4

4

6

1

4

C

U
C
P
3
0
0

1

6

2

5

7

8

5

1

0

2

4

4

4

C

R

C

9

0

1

1

3

1

4

4

4

C

R

C

R

5

9

1

2

4

4

C

C

6

3

0

1

4

4

C

R

4

3

4

1

3

3

3

4

C

C

C

R

8

1

3

3

2

2

3

4

4

C

C

C

6

1

R

4
4
2
4
C

7
0
4
C

9-7

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7

Flow Chart of Troubleshooting

9-1-5. Receiver Part

There is no sound from the Receiver

Yes

Is the terminal of Receiver

Is there any signals at the

Pin#R13 and Pin#R14 of

HI_MONO_OUT_N
HI_MONO_OUT_P

O.K ?

UCP300 ?

END

Yes

Yes

R400

R402

C402

No

No

C403

Replace the Receiver

Check

UCP300

Resolder

(OR

R400, R402)

CON400

1

1
2

2

D401D400

HI_MONO_OUT_N

HI_MONO_OUT_P
LO_MONO_OUT_N
LO_MONO_OUT_P

MONO1_IN_N

MONO1_IN_P

MONO2_IN_N

MONO2_IN_P

4

3

1

1

4

4

C

C

4

0

6

R

7

4

1

6

0
0
4

L
1

0
4

L
2

0
4
R

7

P

E

W

0

0

3

0

0

4

4

R

C

UME200

S71WS256PC0HF3SR0

3
1
2
R

3
0
2
C

5
0
4
C

4
0
4
C

2
0
4
C

9-8

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This Document can not be used without Samsung's authorization

8

R13

HI_MONO_OUT_N

R14

HI_MONO_OUT_P

R12

LO_MONO_OUT_N

P11

LO_MONO_OUT_P

G13

MONO1_IN_N

J13

MONO1_IN_P

G12

MONO2_IN_N

G11

MONO2_IN_P

9

8

0

1

1

1

4

4

4

C

C

R

R

4

0

5

9

1

2

4

4

C

C

9

8

7

4

0

0
1
4
C

C

3

6

1

0

4

4

R

C

8

X

M

A

1
3
C

U

4

0

0

1

2

1

1

4

4

C

C

1

3

1

2

2

3

4

4

4

C

C

C

4

1

R

6
4
2

4
C

7
0
4
C

9
1
3
C

C

1
0
4
C

9-1-6. Speaker Part

There is no sound from the Buzzer

Flow Chart of Troubleshooting

Yes

Is the terminal of Speaker

O.K ?

Yes

Is there any signals at the

Pin#R13 and Pin#R14 of

UCP300 ?

Yes

END

LO_MONO_OUT_N
LO_MONO_OUT_P

STEREO_OUT_R
STEREO_OUT_L

SDA
SCL

C406

C400

C407

VBAT

C411

C401

No

Replace the Speaker

No

1

5

B

C

D

D

D

D

V

V
P

3
D

U400

D
N
G

3
A

OUT+

D
N

S
S

G

V

P

4
C

C412

OUT-

HPR

HPL

C1N
C1P

D5
B5

A1
A2

A4
A5

1

NC

2

NC

D4

RXIN-

B4

RXIN+

D2

INA1

D1

INA2

C2

INB1

C1

INB2

B2

BIAS

B3

SDA

C3

SCL

(OR

R404
R405

Check

Resolder

L400

L401

C410

UCP300

L400, L401)

C408

C409

SPK_N
SPK_P

EAR_R
EAR_L

UME200

S71WS256PC0HF3SR0

8

4
1

3

4

1

C

2
R

4

0

7

3
0
2
C

5

0

0

0

4

4
L

C
4

1

0

0

4

4
L

C
2

0

2

0

0

0

4

4

4

C

R

R

0

3

1

1

1

4

4

4

C

R

C

R

R

0

6

4

5
1
4
C

1

6

4

C

3
1
4
R

7

P

9

W

7

8

X

E

A

M

U

4

0

0

3

0

2

0

1

1

4

4

4

C

C

C

3

1

9

2

3

1

4

4

4

C

C

C

9

4

2

2

4

4

C

C

6

7

0

0

4

4

C

C

8

9

1

1

3

3

C

C

4

C

0

0

1

1

0

1

4

4

C

C

9-9

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This Document can not be used without Samsung's authorization

9

Flow Chart of Troubleshooting

9-1-7. Charging Part

Abnormal charging part

What is the type of Charging?

Yes

TA Charging

Is the U300

VEXT(Pin#1)≒5V ?

Yes

Is the U300

CHG_ON(Pin#6) "LOW"?

ABI,ABO "HIGH"?

Yes

Charging Current is

100mA ~ 450mA ?

Yes

Check The Battery

No

No

No

Check

Check

Check

IFC500

UCD200

U300

END

9-10

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10

Flow Chart of Troubleshooting

EAR_MIC+
EAR_MIC-

EAR_R
EAR_L

EAR_SW

EAR_JACK_IN

SDS_TXD
SDS_RXD

JIG_ON_IF

USB_D+

USB_D-

C503

VEXT_5V

VCCD_1.8V

RADIO_ANT

VBAT

L500

R500

IFC500

1

1

2

L501

L503

ZD500

0

0

5
R
V

1

2

3

6
5
4

ZD501

1

2

3

6

5

4

C504

VBAT

VEXT_5V

VCCD_1.8V

R505

L504

L502

R501
R502

R503
R504

R508

5

0

5
L

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

13

13

14

14

15

15

16

16

17

17

18

18

19

19

20

20

21

NC

22

NC

23

NC

24

NC

25

NC

26

NC

27

NC

SDS_TXD_J
SDS_RXD_J
JIG_ON_IF_J

U300

1

IN

2

GND

36

C313

1
0
5
C

MIC5235-5.0YM5

9

4

3

3

0

U301

2

3

C

ISET

ABI ABO

C

Q
3

0
0

ICHRG CHG_ON

JIG_ON_IF

R304

C312

2

7

6

0

0

0

5

5

5

C

R

R

U500

RT9363APQW

0

5

C

0

8

BATT

7

_POK|

_EN|

5

D
N
G

9

R305

5
0
3
R

T

E

A

4

1

0

0

0

3

3

R

6
0
3
R

4
1
3
C

C314

3

8

8

3

4

R303

1

3

C

X

A

M

U

2
1
3
C

0

3

R

CHG_DET

JIG_ON

9-11

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11

Flow Chart of Troubleshooting

9-1-8. FM Receiver part

Abnormal FM part

What is the type of Charging?

Yes

TA Charging

Check the voltage at Pin#10,

Pin#11 of U401.

Is it OK?

Yes

Is there any signals at the

Pin#R13 and Pin#R14 of

U401 ?

Yes

Is there any signals at the

Pin#M13 and Pin#M14 of

UCP300 ?

Yes

END

No

No

No

Resolder or change

Resolder or change

Check

UCP300

(or Resolder

C318, C319

U401

U401

)

9-12

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12

RADIO_ANT

C420

FM_BUS_EN

L402

Flow Chart of Troubleshooting

VCCD_1.8V

VCCD_2.9V

R420R419

R409

R411

2223

21

19

18 17

20

C

C

D

1

T

C

N

N

N

N

G

1

NC

2

FMI

RFGND

LPI

RST

SEN

U401

K

O

L

I

C

D

S

S

7

8

3

4

5

611

K
L

O

N

I

P

C

_

|

D

G

2

|
3

O

DFS

O

P

P

G

G

DOUT

LOUT

ROUT

GND

K

VDD

L

O

C

I
V

R

10

9

R412

16

15

R414

14

13

12

FM_INT
PCM_CLK

PCM_SYNC
PCM_RXD
RADIO_L
RADIO_R

FM_SCL

FM_SDA

RTC_CLK

C428C426

C427

R421

C434

RADIO_L

RADIO_R

STEREO_OUT_L

STEREO_OUT_R

G

-

A
X
1
2
2
E

-

1
6
1
F

-

L

D

R

6

2

2

C

2

0

6

C

2

0

4

T

0
0
3
C

3
1
2
R

3
0
2
C

5
0
4
C

4
0
4
C

2
0
4
C

5

7

2

2

2

0

3

3

3

C

C

C

3

4

8

1

1

1

4

4

4

C

C

C

R

4

6

0

R

4

0

7

4

1

C

6

0

9

P

8

W

X

7

A

7

E

0
4

L

4

0

U

0

1
0
4

L

0

3

0

2

1

0

0

0

4

4

4

4

C

C

R

R

C316

C317

C318

JIG_ON

PWR_ON

U
C
P

3
0
0

5
1
4
R

3
2
4
C

1

6

9
1
3
C

9
0
4
C

C319

2

6

4

3

3

3

C

C
1

8

2

3

4

3

C

C

R

4

0

2

PWR_KEEP

5

7

8

2

1

0

4

4

4

C

C

R

1

9

0
1

3

1

4

4

4

R

C

C

5

4

9

1

2

2

4

4

4

C

C

C

7

6

3

0

0

1

4

4

4

C

C

R

8

M

1
3
C

C

4

0

0

1

1

2

0

1

1

4

4

4

C

C

C

8
0
4
C

K15

STEREO1_IN_L

K14

STEREO1_IN_R

H11

STEREO2_IN_L/M

J12

STEREO2_IN_R/M

M14

STEREO_OUT_L

M13

STEREO_OUT_R

P6

PWR_KEEP

E5

PWR_SW2

C4

PWR_SW1N

T

H

3

0

0

5

2

R

3

0

0

0

0

3

3

C

R

3

4

4

C

6

5

1

0

3

C

3

4

3

3

1

4
3
3
C

1
4
3
C

0
4
3
C

6

7

1

1

3

3

C

C

1
0
4
U

L

4

0

3

3

3

C

C

R

3

C

0
0
6
D
Z

3
3

7

9

3

3

3

3

3

C

C

C

L

3

0

0

4
0

0

1

3

1

1

C

3

3

C

C

5

0

G

R

4

2

0

C

4

2

8

4

1

3

2

4

4

C

R

R

7

M
G

­0
2

6

B

­5
0

9

7
4

I
S

9

5

C

4

2

C

4

2

R

4

0

R

4

1

9-13

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13

Flow Chart of Troubleshooting

9-2. RF

10-2-1. EGSM RX

Continuous Rx on, Rx input=-60dBm, Channel=37

NORMAL CONDITION

catch the channel?

YES

PAM100 CHECK

Pin#17≥-65dBm ?

YES

PAM100 CHECK

Pin#12≥-65dBm ?

YES

F100 CHECK

Pin#6, #7≥-65dBm ?

YES

RFT100 CHECK

Pin#22, #23≥-65dBm ?

YES

RFT100 CHECK
Pin#12 : 26MHz

NO

NO

NO

ANT, ANT_PAD, L102, C125

NO

RFS100,L100,L101,C104

resolder or change

NO

resolder or change

NO

resolder or change

resolder or change

resolder or change

CHECK

contact ?

PAM100

F100

RFT100

OSC100

YES

RFT100 CHECK

Pin#1,#2,#3,#4

Vp-p : 550mV?

YES

GSM Receiver is OK?

END

NO

NO

RFT100

resolder or change

GSM RX path componet

resolder or change

9-14

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14

9-2-2. DCS RX

Flow Chart of Troubleshooting

Continuous Rx on, Rx input=-60dBm, Channel=698

NORMAL CONDITION

catch the channel?

YES

PAM100 CHECK

Pin#17≥-65dBm ?

YES

PAM100 CHECK

Pin#13≥-65dBm ?

YES

F100 CHECK

Pin#8, #9≥-65dBm ?

YES

RFT100 CHECK

Pin#19, #20≥-65dBm ?

YES

RFT100 CHECK
Pin#12 : 26MHz

NO

NO

NO

ANT, ANT_PAD, L102, C125

NO

RFS100,L100,L101,C104

resolder or change

NO

resolder or change

NO

resolder or change

resolder or change

resolder or change

CHECK

contact ?

PAM100

F100

RFT100

OSC100

YES

RFT100 CHECK

Pin#1, #2, #3, #4

Vp-p : 550mV?

YES

DCS Receiver is OK?

END

NO

NO

RFT100

resolder or change

DCS RX path componet

resolder or change

9-15

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15

Flow Chart of Troubleshooting

9-2-3. EGSM TX

MS TX level 19, CH : 62, RBW : 100KHz, VBW : 100KHz, SPAN : 10MHz, REF LEV. : 10dBm

Check PAM100

Pin#17=2~5dBm

Yes

Check and Change

RFS100, L104, C100

L101, L100, C104

No

PAM100 TX_EN

Pin #4 : 2.85V ?

Yes

PAM100 VBATT

Pin #30 :3.8V

Yes

PAM100 BS1

Pin #5="LOW"

Yes

PAM100 VLOGIC

Pin #2="HIGH"

Yes

PAM100 VRAMP

Pin #3≤1.8V ?

Yes

Check PAM100

Pin #27=-5dBm

No

Check and Change

No

Check the battery

No

Check and Change

No

No

Check and Change

No

UCP300

block

UCP300

UCP300

Check or Change

RFT100

Check or Change

UCP300

NO

Yes

Check and Change

PAM100

Check RFT100

Pin#28=1.5~5.5dBm

RFT100

YES

RFT100

RFT100

Pin#1,#2,#3,#4

=550mV

No

YES

Pin#12=26MHz

Check or Change

9-16

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16

Yes

NO

Check or Change

OSC100

9-2-5. DCS/PCS TX

DCS: MS TX level 15 CH : 698, RBW : 100KHz, VBW : 100KHz, SPAN : 10MHz, REF LEV. : 10dBm

Flow Chart of Troubleshooting

Check PAM100

Pin#17=2~5dBm

Yes

Check and Change

RFS100, L104, C100

L101, L100, C104

No

PAM100 TX_EN

Pin #4 : 2.85V ?

Yes

PAM100 VBATT

Pin #30 :3.8V

Yes

PAM100 BS1

Pin #5="HIGH"

Yes

PAM100 VLOGIC

Pin #2="HIGH"

Yes

PAM100 VRAMP

Pin #3≤1.8V ?

Yes

Check PAM100

Pin #29=-5dBm

Yes

No

Check and Change

No

Check the battery

Check and Change

No

No

No

Check and Change

No

UCP300

block

UCP300

UCP300

Check or Change

RTF100

Check or Change

UCP300

NO

Check and Change

PAM100

Check RFT100

Pin#28=1.5~5.5dBm

RFT100

NO

RFT100

RFT100

Pin#1,#2,#3,#4

=550mV

No

YES

Pin#12=26MHz

Check or Change

9-17

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17

Yes

NO

Check or Change

OSC100

Flow Chart of Troubleshooting

VRF_2.9V

R104

1
2
3
4
5
6
7
8
9

10

VRF_2.9V

R102

C106

A
AX
B
BX
VDD1
FSYS3
FSYS2
VDD2
XO
XOX

C
N

VRF_2.9V

R103

C107

RTX_I_P

RTX_I_N
RTX_Q_P
RTX_Q_N

CLK26M_BT

3

2

0
0
1
C
S

O

4

1

CLK26M_DBB

SBCK
SBDT

SBLE

C108

C117

C120

VRF_1.5V

7
0
1

5
3

R

3

4

3

3

C

D

D

N

N

N

G

G

RFT100

1
S

D

Y

N

S
F

G

1
1

8

9

2

0

1

2

2

3

3

3

5

1

6

2

F

X

X

D

E

D

T

T

D

R

D

VDD4

V

V

R

RX1X

RX1

RX2X

RX2

GND

RX3X

RX3

RX4X

3

RX4

D

K

A

L

N

D

D

E

V

C

5

6

2

3

4

1

1

1

1

1

VRF_1.5V

C110C109

C111

C112

7
2

26
25
24
23
22
21
20
19
18
17

DCS_LNA_IN_N

VRF_1.5V

C121

R105
R106

GSM_PAM_IN

DPCS_PAM_IN

UCD200

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OCTL_0
OCTL_1

OCTL_2
OCTL_3

OCTL_4
OCTL_5

OCTL_6
OCTL_7

T18
P17

M15
N18

P19

N15

P18

R17

9-18

18

BAND_SEL

VMOD_EN
TX_EN

Flow Chart of Troubleshooting

DCS_LNA_IN_N

DCS_LNA_IN_P

GSM_LNA_IN_N

GSM_LNA_IN_P

C119

C122

C123

C124

C105

RFS100

G

G

C

C116

C118

A

4

3

1

2

R100

R101

L102

R108

VMOD_EN
VAPC
TX_EN

GSM_PAM_IN
DPCS_PAM_IN

C101

ANT100

TP

ANT101

TP

ANT102

TP

VBAT

C103C102

5

BS1

6

BS2

12

RX1

13

RX2

11

NC

14

NC

G

4

3

1

1

1
C

F100

L107

9

BAL1

8

OUT1

7

L108

BAL2

6

OUT2

G

510

6

1

3

C

1

IN1

4

IN2
G2G3G

PAM100

G

G

G

G

G

G

G

G

G

5

3

4

2

1

8

6

5

3

3

3

3

3

2

2

2

L100

L101

C104

0

7

3

1

T

T

T

N

A

A

G

G

0

2

G

G

9

8

1

1

VLOGIC

VRAMP

TX_EN

GSM_IN

DCS|PCS_IN

G

G

G

G

6

5

0

1

1

1

9

G

G

7

8

B
V

G

G

G

3

2

1

4

2

2

2

2

C100

L103

2
3
4

27
29

1

L104

C115

C

1

4

0

0

1
M

A
P

1

C

1

C

1

1

2

0

C

F

1

1

1

0

L

1

C

1

3

0

C

1

5

0

C

1

5

1

R

1

8

0

C

1

8

1

C
1
0

C

1

6

1

3

0

1

C

2

R

C

L
1

1

1

0

0

1

5

6

2

9

1
0
7

1

C

2

2

L
1

1

C

2

3
0
8

1

C

2

4

C

C

1

1

0

1

9

0

2

O
S

C

0

0

1
T
F

R

R

R

C

1

1

1

0

0

0

2

7

6

1

0

0

C

0

1

7

C
1
1
7

R

0

1

3

C

0

1

8

R

0

1

4

3

0

1

L

2
0
1
T
N
A

0
0
1
T

N
A

1
0
1
T

N
A

4

0

1

L

C

1

1

0

C
1
2
5

0

2

1

L

C

4

1

0
C
1
0
0

L
1
0
0

L

0

1

1

001SFR

R
1
0
0

R

C

L
1

1

1

0

0

1

6

5

1

9-19

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19