LG ME550d, Service Manual

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E

A

RX

TX

4

5

A

Checked

Approved

MODEL

B

C

Section

(UART3 <=> Bluetooth)

1

2

ANALOG SWITCH

BOOT SELECT

Designer

LG Electronics Inc.

3

4

DRAWING

NAME

DRAWING

NO.

Sheet/

Sheets

5

6

7

8

C

D

18Pin IO Connector

0(COM-NC)

1(COM-NO)

MAX47*

9

1

0

1

D

2

3

ANALOG SWITCH

ON BOARD  JTAG  INTERFACE

(UART3 <=> Remote control))

B

FM RADIO

OVP

27p

K

2007

01/24

ME550c MAIN

3/4

1.1

IO CONNECTOR & UART

Date

Sign & Name

TP308

C323

TP307

TP303

TP306

100K

R317

C318
1uF

FB301

16
17
18

19

2

20

21

22

3
4
5
6
7
8
9

CN301

1

10
11
12
13
14
15

VBAT

TP302

R325

100K

0.1u

C320

NA

EVLC14S02050

VA302

C317

C321

0.1u

C312

C313

4.7u

VRIO

0.47u

100K

R307

10K

R332

0

R318

10

5

_RST

6

_SEN

VRIO

12

GND3

15

GPIO1

19

18

GPIO2

GPIO3

17

14

LOUT

NC1

1

20

NC2

PGND

21

9

RCLK

3

RFGND

13

ROUT

SCLK

7

SDIO

8

16

VA

11

VD

VIO

VRIO

U304

SI4703-B16-GM

2

FMIP

4

GND1

GND2

20K

R334

2.4K

R312

R323

56K

0.1u

C314

C324

VRIO

VRABB

47p

TP309

TP310

100p

C315

10u

C303

20K

R329

VA301

EVLC14S02050

R313

100K

R311

NA

0.1u

C325

NO1

3

NO2

NO3

7

11

NO4

17

PGND

V+

14

VCHG_IN

VCHG

VBAT

COM1

16

COM2

4

COM3

8

COM4

12

GND

6

2

IN1-2

10

IN3-4

NC1

1

NC2

5

NC3

9

NC4

13

15

U305
ISL8499IRZ-T

VRIO

R333
10K

ESD1

A1

A3

ESD2

C1

ESD3

ESD4

C3

GND

B2

VBAT

CSPESD304G

D301

TP301

TP305

75

R31

C311

0.1u

10K

R336

R306

100K

C301
120p

NA

R390

100nH

L303

VRIO

0.1u

R319

20K

C316

R335

NA

R320

0

2

3

1

R32
75

Q301
2SC5585

G4

33K

R330

26

27

28

29

30

17

18

19

20

21

22

23

24

G1

G2

G3

10
11
12
13
14
15

2
3
4
5
6
7
8
9

16

25

CN302

1

5

VCC

VRIO

VRIO

FB302

U306

TC7SH04FS

2

GND

1

4

VCHG_IN

120p

L304
100nH

C310

C307
47p

47p

C305

C304
82p

C306
82p

VRABB

C308

0.1u

R314

47

TP304

COM2

COM3

8

12

COM4

6

GND

IN1_IN2

2

IN3_IN4

10

NC1

1

5

NC2

9

NC3

NC4

13

NO1

15

NO2

3

7

NO3

11

NO4

PGND

17

14

V+

R310

MAXT

U303

COM1

16

4

VBAT

3K

R322

10K

8

GATE

GATE_OUT

9

2

GND

IN1

1

IN2

4

5

IN3

NC1

11
12

NC2

6

OUT1

OUT2

7

10

_EN

_FLAG

3

U302 NCP348MTR2G

C319
1uF

R328

47K

0.1u

C322

120p

C302

I2C_SCL

I2C_SDA

FM_ANT

CLK_32K

VBUS

FM_ANT

BATT_TEMPS

BATT_TEMP

_FM_RESET

RADIO_L

FM_INT

RADIO_R

BT_RTS

TR_USB_DM

TR_USB_DP

VBUS

REMOTE_INT

UART_RXD

UART_TXD

REMOTE_ADC

JTAG_TCK

JTAG_RTCK

JTAG_TDO

UART3_RX

UART3_TX

UART3_CTS

UART3_RTS

BT_NRST

BT_NRST

UART_RXD

UART_TXD

UART_CTS

UART_RTS

BT_RX

BT_TX

BT_CTS

VBATS

JTAG_TRST

JTAG_TDI

JTAG_TMS

HSMICBIAS

UART3_DSR

UART2_TX

VBUS

JACK_TYPE

BOOT_SEL

USB_BOOT_SEL

HSO_R

HSO_L

JACK_DETECT

RPWON

UART2_RX

HOOK_DETECT

HSMICIP

7. CIRCUIT DIAGRAM

ME550d