Samsung SGH-C120 Manuel utilisateur

GSM TELEPHONE

SGH-C120

GSM TELEPHONE CONTENTS

1. Specification

2. Flow Chart of Troubleshooting

3. Exploded Views and Parts List

4. Electrical Parts List

5. PCB Diagrams

6. Block Diagrams

Samsung Electronics Co.,Ltd.

Code No.: GH68-08501A

2005. 11. Rev.1.0

ⓒ

This Service Manual is a property of Samsung Electronics Co.,Ltd.

Any unauthorized use of Manual can be punished under applicable

International and/or domestic law.

SAMSUNG Proprietary-Contents may change without notice

1. SGH-C120 Specification

1-1

This Document can not be used without Samsung's authorization

1-1. GSM General Specification

GSM900

Phase 1

EGSM 900

Phase 2

DCS1800

Phase 1

Freq. Band[MHz]

Uplink/Downlink

890~915

935~960

880~915

925~960

1710~1785

1805~1880

ARFCN range 1~124 0~124 &

975~1023 512~885

Tx/Rx spacing 45MHz 45MHz 95MHz

Mod. Bit rate/

Bit Period

270.833kbps

3.692us

270.833kbps

3.692us

270.833kbps

3.692us

Time Slot

Period/Frame

Period

576.9us

4.615ms

576.9us

4.615ms

576.9us

4.615ms

Modulation 0.3GMSK 0.3GMSK 0.3GMSK

MS Power 33dBm~13dBm 33dBm~5dBm 30dBm~0dBm

Power Class 5pcl ~ 15pcl 5pcl ~ 19pcl 0pcl ~ 15pcl

Sensitivity -102dBm -102dBm -100dBm

TDMA Mux 8 8 8

Cell Radius 35Km 35Km 2Km

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SGH-C120 Specification

1-2

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1-2. GSM TX power class

TX Power

control level GSM900

533±2dBm

631±2dBm

729±2dBm

827±2dBm

925±2dBm

10 23±2dBm

11 21±2dBm

12 19±2dBm

13 17±2dBm

14 15±2dBm

15 13±2dBm

16 11±3dBm

17 9± 3dBm

18 7±3dBm

19 5±3dBm

TX Power

control level DCS1800

030±3dBm

128±3dBm

226±3dBm

324±3dBm

422±3dBm

520±3dBm

618±3dBm

716±3dBm

814±3dBm

912±4dBm

10 10±4dBm

11 8±4dBm

12 6±4dBm

13 4±4dBm

14 2±5dBm

15 0±5dBm

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2. SGH-C120 Flow Chart of Troubleshooting

2-1

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2-1.Baseband

2-1-1. Power ON

'Power On' does not work

Voltage >=3.3V

Download again

Charge the Battery

Pin#J12 >= 2.8V Check U300 and C315

Pin#A13 and

pin#A14 =2.8V Check U300 and C316

Freq = 13MHz

Vrms >=300mV

Vpp≒900mV

Check the clock generation circuit

(related to OSC100)

Check the initial operation

END

Yes

pin#G11 =

1.8V

Yes

Check the current consumption

Check the Vbat Voltage

Check the pin of U300

Checktheclocksignalatpin#8ofU100

Current consumption

>= 100mA

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SGH-C120 Flow Chart of Troubleshooting

2-2

This Document can not be used without Samsung's authorization

①

②

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SGH-C120 Flow Chart of Troubleshooting

2-3

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VCCB_2.9V

R302

C316

VCCA_2.9V

R303

NEG

POS

C325

BAT300

TR300

C313

R311

C317

VBAT

VCCD_2.9V

R307

VRF_2.9V

C311

C306

VCCA_2.9V

C304

C302

C301

C312C315

R300

C324

VRF_2.9V

C308

C300

R301

VRTC_2.9V

C322

SIM300

VCC_1.8A

C305

C318

C309

R304

QANEOX

C307

C12

VREFA10

NGERV

41R

PGERV

31M

VRTCH11

VSIMK12

1SSV

2SSV

3SSV 2R

4SSV 6P

MCVXV

31R

VL4S_AA12

VL4S_BB11

VL5S_AD10

VL5S_B

VLDO_1G11

VLDO_2J12

A13

VLDO_3

VLDO_4B12

VLDO_5B10

VLDO_6A14

VLDO_7

3DDV 6N

VDD34C11

5DDV 01C

76DDV 31B

BDDV 6A

DDDV 11N

VDDV 11L

1OI_DDV 5N

2OI_DDV

LTCO_DDV

VEXTE14

SIM_RSTK11

PXT

UP_CLKN9

UP_IOP10

UP_RSTR10

VACCF14

VBATE13

1DDV 3J

VDD12J13

2DDV 3M

NQXTXR

PQXTXR

SCLK_PSCL8

SDI_PSC

SDO_PSCN7

SERCK

SERDA

B1SERLE1

SERLE2

SIM_CLKK14

SIM_IOJ11

1FERAR

2FERAR

R3RESETN_CSP

O_TESER

RTC_ALMNH10

KLC_CTR

RWN

NIXTXR

PIXTXR

C5OCTL1

OCTL2

OCTL4

G6OCTL5

OCTL6

A3OCTL7

FUB_1WSP

PEEK_RWP

N1WS_RWP

51C

2WS_RWP

41C

NTUOCIM

51P

PTUOCIM

51N

5CN

6CN 2

7CN

11F

LTCO_DNG 4B

1CSP_DNG 51B

2CSP_DNG 51K

QRTNI

01L

L3I|O

LED1_DRVG13

LED2_DRVG12

6R CM

NNICIM

41M

PNICIM

41N

71SDNG 01K

2SDNG 8F

3SDNG 9F

4SDNG 01F

5SDNG 7G

6SDNG 8G

7SDNG 9G

01G

8SDNG

9SDNG 6H

VDNG 31P

RUCH_

DNG

BDNG

DDNG 01M

QDNG 8E

1SDNG

01SDNG 7H

11SDNG 8H

21SDNG

31SDNG

41SDNG 8J

51SDNG 9J

61SDNG 01J

DB15

DB2

J5DB3

DB4

DB5

G3DB6

DB7

DB8

DB9

RTNID

KCIAD

6L IDIAD

ODIAD

NRIAD

DB0

DB1

DB10

DB11

DB12

DB13

DB14

21P NBTUOA

21R PBTUOA

41L NNIXUA

PNIXUA

51M

31L NTUOXUA

PTUOXUA

31K

CH_BDRVE11

CH_ISENF12

CH_RESD14

CREF

CSN_PSC

N1AB3

AB4

AB5

M1AB6

AB7

AB8

ADC_AUX1E10

CFA

NATUOA

21N

PATUOA

11P

U300

AB0

P1AB1

AB2

C314

VCCD_2.9V

VBAT

C303

INTRQ

PWR_KEEP

MOTOR

RING_EN

KEY_COL(2)

KEY_ROW(0)

TSR

BUZZER

SIMCLK

SIMDATA

SIMRST

GSM_TX_EN

DCS_TX_EN

VREF

NTUOCIM

PTUOCIM

NO_RWP

NO_GIJ

RTCALARM

K23KLC

RTX_IN

RTX_IP

RTX_QN

RTX_QP

UP_SCLK

UP_SDI

UP_SDO

TXPOWER

PATUOA

NBTUOA

PBTUOA

NNIXUA

PNIXUA

NTUOXUA

PTUOXUA

UP_CS

TNI_PSD

KEY_BL1

CM_M31KLC

NNICIM

PNICIM

RF_EN

XOENA

FLASH_RESET

DSP_IO

DSP_RWN

AFC

NATUOA

DSP_DB(13)

DSP_DB(12)

DSP_DB(11)

DSP_DB(10)

DSP_DB(1)

DSP_DB(0)

DSP_AB(8)

DSP_AB(7)

DSP_AB(6)

DSP_AB(5)

DSP_AB(4)

DSP_AB(3)

DSP_AB(2)

DSP_AB(1)

DSP_AB(0)

DSP_DB(0:15)

DSP_AB(0:8)

SERLE

SERDAT

SERCLK

TX_EN

TX_BAND_SEL

DSP_DB(9)

DSP_DB(8)

DSP_DB(7)

DSP_DB(6)

DSP_DB(5)

DSP_DB(4)

DSP_DB(3)

DSP_DB(2)

DSP_DB(15)

DSP_DB(14)

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SGH-C120 Flow Chart of Troubleshooting

2-4

This Document can not be used without Samsung's authorization

R106

R104

R105

VRF_2.9V

VCCD_2.9V

R107

R110

_SEN

8XOUT

RFIPN

RFIPP

SCLK

SDIO

RFIAN 24

RFIAP 23

RFIDN

RFIDP

RFIEN

RFIEP

BIN

BIP

BQN

BQP

U100

OSC100

C120

C123

VRF_2.9V

R111

C133

C130

C134

RF_EN

SERDAT

AFC

SERLE

SERCLK

13MHZ_BB

RTX_QP

RTX_QN

RTX_IP

RTX_IN

XOENA

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SGH-C120 Flow Chart of Troubleshooting

2-5

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2-1-2. Initial

Initial Failure

The pin #G11 of U101 =

1.8V and

the pin #J12 of U101 =

2.8V ?

Check the U300

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

Yes

Is the pin #K9 of U101

"Low →High" ?

Yes

No Check the U300

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

There is 32.768kHz wave

forms at the C216 and

C217

Yes

Check the U200

Is the pin #A4 of U300

is "High"

The voltage is "High" at

the C313,C315,C316 Check the U300

Check the U100

LCD display is O.K

Yes

Check the LCD part

Sound is O.K

Yes

Check the Audio part

END

Yes

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SGH-C120 Flow Chart of Troubleshooting

2-6

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