LG KE590 Service Manual page 118

7. CIRCUIT DIAGRAM
1 2
ANALOG SWITCH
(UART3 <=> Bluetooth)
VBAT
MAX47*
A
MAX4701ETE+T
U303
0(COM-NC) 1 16
UART_RXD NC1 COM1
2 15
BT_NRST IN1_IN2 NO1
1(COM-NO)
3 14
BT_TX NO2 V+
4 13
UART3_TX COM2 NC4
5 12
UART_TXD NC2 COM4
6 11
GND NO4
7 10
BT_CTS NO3 IN3_IN4
8 9
UART3_CTS COM3 NC3
17
PGND
B
FM RADIO
R420
R421
47K 47K
1
C C317 100p NC1
2
U304
FM_ANT FMIP
3
RFGND
4
C319 GND1
5
NA _RST SI4703-B16-GM
D
BOOT SELECT
VRIO VRIO
R320
10K
USB_BOOT_SEL
3
BOOT_SEL
R322
Q301
E 2
VBUS R321
2SC5585
20K NA
1
1 2
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3 4 5
OVP
VBUS_IN
UART3_RX
U302 NCP348MTR2G
BT_RX
1 10
IN1 _EN
4 9
IN2 GATE_OUT
UART_RTS
5 8 VBUS
IN3 GATE
UART3_RTS
3 7
_FLAG OUT2
BT_RTS
2 6
GND OUT1
11
BT_NRST NC1
12
NC2
UART_CTS
VRIO
VRABB
15 C316 0.1u
GND3 RADIO_L
14
LOUT
13 C318 0.1u
ROUT RADIO_R
12
GND2
11
VD REMOTE_INT
REMOTE_ADC
VRIO
C320 C321
1uF 1uF
C322
R315
VRABB
0.1u
100K
TC7SH04FS
VCC
5
C323 C324
4 1
CLK_32K
U306
0.1u 0.1u
2
C325 GND
R316
27p
47K
AUTO TP(AT COMMAND)
ON BOARD JTAG INTERFACE
VRIO
4
JTAG_TRST
3
JTAG_TDI
2
JTAG_TMS
1
CN305
JTAG_TCK
4
JTAG_RTCK
3
JTAG_TDO
2
1
CN306
3 4 5
6 7
HOOK_DETECT
C303
120p
R303 75
HSO_L
HSO_R
R304 75
VREXTL
R306 0
C305 C306
C307 C308
120p 10u
82p 47p
C309
82p
L301
HSMICIP
100nH
C312
120p VA301
EVLC14S02050
JACK_TYPE
JACK_DETECT
RPWON
VBAT
UART3_DSR
VBUS_IN
VRIO
0.1u
C313
VA302
EVLC14S02050
UART_TXD
UART_RXD
ANALOG SWITCH U305
ISL8499IRZ-T
(UART3 <=> Remote control))
R311 0 1 12
NC1 COM4
2 11
IN1-2 NO4
20K
3 10
R312
NO2 IN3-4 VBUS
4 9
COM2 NC3
TR_USB_DP
TR_USB_DM
BATT_TEMPS BATT_TEMP
R317
R318 20K
C326
33K
47p
VBAT
TP304
TP306
RPWON
TP307
UART3_RX
TP309
UART3_TX
TP312
- 119 -
8 9 10
VRIO VBAT VCHG
C310
47p
CN301
R309 47 21
19
FB303
1
2
3
FB304
4
5
6
FB305
7
8
9
10
FB301
11
12
13
14
C314 C315
4.7u 0.47u FB302
15
16
UART2_TX
17
UART2_RX
18
20
C441
L303
22
24p
100nH
18Pin IO Connector
RX
FB306
FB307
TX
VBAT
EVLC18S02015
ZD301
ZD302
EVLC18S02015
VBATS
ZD303 EVLC18S02015
EVLC18S02015 ZD304
C327
C439
47p
0.1u
LGE Internal Use Only
A
FM_ANT
L302
100nH B
C
D