LG Electronics U250 service manual Circuit Diagram, 143

7. CIRCUIT DIAGRAM

1

2

3

4

5

ANT101

ANT102

ANT_SEL0

ANT_SEL1

GSM 1800/GSM 1900 RX

LOW

LOW

C450

SW100

C101

GSM 850/ GSM 900 RX

HIGH

LOW

A

22p

56p

GSM 850/GSM 900 TX/ WCDMA

LOW

HIGH

G2

ANT

RF

G1

GSM 1800/GSM 1900 TX

HIGH

HIGH

1p

L101

C102

KMS-507

C437

NA

NA

L102

100nH

Rev.C

Rev.D

U500

Rev.C

C439

5p

11

L108

VREG_RF_SMPS

19

VDD

ANT

GSM900_RX1

5

DCS

C105

15nH

6

0.5p

GSM900_RX2

1

NA

Rev.B

C117

GSM1800_RX1

2

C440

5p

C190

B

10p

7

GSM1800_RX2

3

8

GND1

GSM1900_RX1

4

GND2

GSM1900_RX2

10

GND3

WCDMA2100

9

12

GND4

C442

5.6p

1K

R100

13

GND5

D5011

CTRL1

18

ANT_SEL0

15

GND6

CTRL2

22

1K

R101

ANT_SEL1

17

GND7

PCS

C116

20

GSM900_TX

16

21

GND9

GND8

NA

NA

23

GND10

GSM18001900_TX

14

C110

C109

C443

5.6p

C191

33p

33p

L405

2.7nH

C

L115

100p

1.5nH L116

RAMPPAGSM

EGSM

C120

5.6nH

NA

L111

Rev.D

+VPWR

C123

C121

C124

L403

0.01u

33u

L406

2.7nH

10nH

18nH

100ohm

R107

C441

C438

C134

8.86dB

Rev.1.0

5.6p

100p

0.01u

C136

C139

R108

D

C137

C138

0.01u

DCS_PCS_TX

NA

NA

68p

R110

51

R111

20

17

6

2

91

91

VAPC

VBATT

VCC1B

VCC1A

FL101

15

DCS_PCS_OUT

DCS_PCS_IN 3

7.5dB

4

5

11

EGSM_OUT

U101

EGSM_IN

4

O1

G3

1

R112

GSM_TX

IN

G2

G1

39

19

RSVD_GND

ENABLE 18

R113

100ohm

GSM_PA_EN

3

2

R114

100ohm

R115

100ohm

21

SKY77318

P_GND

BS 1

15p

EFCH897MTDB1

E

GND9 GND8

GND7

GND6

GND5

GND4 GND3

GND2

GND1

C149

R117 100ohm

GSM_PA_BAND

16 14 13 12

10

9 8

7 5

C153

GSM_PA_BAND

MODE

15p

LOW

GSM

GSM/EDGE

HIGH

DCS/PCS

WCDMA

Rev_1.0

C154

Rev.D

1.5p

+VPWR

+VPWR

F

FL102

C155

C158

C159

4

5

EFCH1950TDF1

O1 G3

1

4.7u

15p

15p

L122

C157

L404

G2

IN

NA

10nH

G1

1.8nH

WS2512_TR1G

U103

3

2

10

VCC2

VCC1

1

FL104

L123

9

GND4

RFIN

2

4

PGND

RX

1

1nH

Rev_1.0

3

ANT

TX

2

C162

8

RFOUT

GND1

3

ACMD-7602

3.3p

7

4

GND3

VCONT

PA_R0

1

2

C164

C165

6

GND2

0.5p

OUT

IN

0.5p

1p

11

BGND

VREF

5

L125

50OHM

20dB

COUP

5

TR100

1

C

KRX102U

U102

4

3

2

PA_ON

CP0402A1950DNTR

51R119

Rev.B

4

3

VREG_TCXO_2.85V

R120

PWR_DET

C192

C170

R121

R122

130

47

130

100p

0.1u

7dB

L128

C174

D

1.8nH

10p

Rev.D

TCXO

L407

2.7nH

X100

DSA321SCE-19.2M

7

NC3

NC2

6

VREG_TCXO_2.85V

8

NC4

NC1

5

OUTPUT GND

3

2

100ohm

R124

E

4

VCC

VCONT

1

C183

TRK_LO_ADJ

19.2MHz

VREG BT 2.85V

C181

0.1u

C182

1000p

0.01u

R128

100K

C186

C185

100p

TCXO_PM

VCC

1000p

C187

1000p

C188

0.01u

5

RTR6275_TCXO

2

4

TCXO_BT

U104

3

F

TC7SH04FU

GND

1

2

4

5

6

7

8

9

LG(42)-A-5505-10:01

14

15

16

A

TX_IP

C103

180p

C104

180p

Rev.C

55

ENV_OUT

ENV_LNP

2

TX_IM

TX_QP

C106

8.2p

ENV_LNN

1

C108

46

HB_RF_OUT1

180p

DCS_PCS_TX

44

TX_IP

51

B

6p

HB_RF_OUT2

50

C107

C113

43

TX_IN

53

GSM_TX

12p

LB_RF_OUT1

TX_QP

180p

C112

42

52

24

LB_RF_OUT2

TX_QN

7

TX_QM

TX_ON

RF_ON

TCXO

RTR6275_TCXO

TX_AGC_ADJ

56

VCONTROL

VTUNE1

5

C114

3300p

18

C115 1000p

54

VTUNE2

DAC_REF

DAC_REF

VTUNE-Connected directly to GND

C118

U100

RX_IP

12

RX_IP

14

13

12p

SBDT

RX_IN

RX_IM

R103

12K (1%)

3

R_BIAS1

RTR6275 RX_QP

10

RX_QP

27

11

R_BIAS2

RX_QN

RX_QM

SSBDT_RTR

R104 680 (1%)

40

C119

22p

PWD_DET_IN

PWR_DET

C

31

21

Rev.B

30

GCELL_INP

TEST

R105

5.1

GCELL_INN

4

R433

2.7

Rev.D

32

VDDA1

EGSM_INP

VDDA2

6

VREG_RF_SMPS

33

8

R434

2.7

EGSM_INN

VDDA3

9

R106

5.1

VDDA4

38

15

C122

DCS_INP

VDDA5

39

DCS_INN

VDDA6

16

C126

C127

C128

C129

C130

C131

C132

L114

47nH

22u

36

VDDA7

20

19

37

GPCS_INP

VDDA8

28

C189

Rev.C

GPCS_INN

VDDA9

22p

0.1u

22p

0.1u

22p

0.1u

22p

22p

22

VDDA10

45

41

23

CAL_INP

WLNAOUT

WMIXINP

WMIXINN

VDDA11

47

CAL_INN

VDDA12

L119

26

GND

PGND

VDDM

VDDA13

48

C140

C141

C142

47nH

VREG_SYNTH_2.6V

WLNA_IN

VDDA14

49

D

29

34

35

25

57

17

VDD_RX

22p

22p

100p

C135

0.1u

R109

10

L120

C144

22u

C14722p

C143

0.1u

47nH

VREG_RF_SMPS

Rev.D

R116

VREG_MSMP_2.7V

E

C150

C151

C152

100ohm

Rev.D

1000p

22p

0.01u

VDD_RX

C156

L121

100p

1nH

F

Rev.D

Rev.D

C161

L409

C444

4.7nH

2.2p

2.2p

BLUETOOTH

5

4

L411

1

G2 O2

FL103

IN

O1 EFCH2140TDE1

4.7nH

G1

2

3

ACS2450HBAXX

C

L410

C445

R118

NC1

L408

4.7nH

2.2p

FEED

NC2

10nH

0

L126

ANT103

NA

NA

C169

M100

LBRQ-2B43A

16

BT_CLK

C171

1000p

9

CLK_REF

ANT

SBST

4

BT_SBST

11

SBCK

BT_SBCK

C172

1u

3

12

VCC_OUT

SBDT

BT_SBDT

C173

2.2u

2

5

VDD_INT

SYNC_DET_TX_EN

BT_TX_RX_N

R123

10

13

D

VREG_MSMP_2.7V

VDD_MSM

RX_BB_TX_BB

BT_DATA

0

14

7

VREG_BT_2.85V

VDD_BAT

XTAL_IN

TCXO_BT

100p

0.1uF

2.2u

100p

1000p C176

PGND4

PGND3

PGND2

PGND1

GND4

GND3

GND2

GND1

C179

C177

C180

C178

20

19

18

17

15

8

6

1

E

Section

Date

Sign & Name

Sheet/

Designer

MAR. 07. 2007

KANG. H. S

MODEL

U250/KU250

Sheets

1/4

Checked

RF

DRAWING

Approved

LG Electronics Inc.

DRAWING

REV_1.2

NO.

LG Electronics Inc.

LGMC

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