LG TU550 Service Manual page 144

7. CIRCUIT DIAGRAM
1 2 3
U501 AAT3152IWP
A C400 1u
8 3
+VPWR IN C1+
R470
5 4
WLED_PWR OUTCP C1-
C404 1u
6
0 C2+
2
LCD_BL_CTRL EN_SET
7
C2-
10
ISINK1 WLED_1
11
ISINK2 WLED_2
9 12
GND ISINK3 WLED_3
13 1
PGND ISINK4 WLED_4
1u
B
C
D VREG_MSMP_2.7V
KEY
RA500
R403
10K
10K
KEY_ROW(0)
501 503
1 2
E KEY_ROW(1)
500 502
4 5
KEY_ROW(2)
506 507
7 8
KEY_ROW(3)
HOT503 508
KEY_COL(0) HOT4 0
KEY_ROW(4)
F KEY_COL(1)
KEY_COL(2)
KEY_COL(3)
KEY_COL(4)
+VPWR
C R465
100
R466
100
R467
100
R469
100
D
R471
100
KEY_ROW(4)
KEY_ROW(3)
KEY_ROW(2)
KEY_ROW(1)
KEY_ROW(0)
KEY_COL(5)
KEY_COL(4)
E KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
KEY_COL(0)
F
1 2 3
LG(42)-A-5505-10:01
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6 7 8
U500 MIC5252-2.8BML
1 6
LCD_LDO_EN EN BYP
2
GND
7 5
PGND NC R499
3 4
IN OUT
+VPWR
C401
C402 C403
1u
1u 0.01u
smd_1608h_9_r
U503 MIC2211-LGYML
1 10
+VPWR VIN VOUT1 VREG_CAM_2.7V
R480
2 9
EN1 VOUT2
CAM_LDO_EN VREG_CAM_1.8V
0
3 8
EN2 NC3
4 7
BYP NC2
6
GND
5 11
C411 C412 NC1 BGND C413 C414
1u 0.01u 1u 1u
HOT502 CLR500 MENU500
HOT3 CLR MENU ON_SW
505 LEFT500 UP500 END
D700
3 LEFT UP ON_SW_N END
RB520S-30
504 OK500 RIGHT500
6 OK RIGHT
509 SND500 SEARCH500
9 SND
SEARCH
HOT504 DN500 BACK500
PM_ON_SW_N
HOT5 DN BACK
KEY_BACK_LIGHT
R451 R452
100 100
R1045
100
R468 R456 R457
100 100 100
R495 R458 R459
100 100 100
R472 R1044
100 100
KYBD_BACKLIGHT
R5555
NA
USB_VBUS USB_VBUS_IN
PS_HOLD
4 5 6 7 8
9 10 11 12
USIM
VREG_LCD_2.8V
0
R401
15K
CON500
4 1
GND VCC VREG_UIM_2.85V
5 2
VPP RST USIM_P_RST_N
6 3
USIM_P_DATA I_O CLK USIM_P_CLK
C465
33p
U502
6 1
USIM_P_DATA USIM_P_CLK
5 2
4 3
VREG_UIM_2.85V USIM_P_RST_N
RCLAMP0504F
SIDE KEY
KEY_ROW(2)
CN500
1
HF_N
2
KEY_ROW(1)
3
4 Q500
5
KEY_ROW(0)
R888
KEY_COL(5)
RA501
51
1
JTAG_RTCK
3
JTAG_TDO
VA527 5
JTAG_TMS
EVLC14S02050 7
JTAG_TCK
RA502
NA
1
JTAG_TDI
3
JTAG_PS_HOLD
5
JTAG_TRST_N
7
MSM_RESIN_N
NA
VREG_MSMP_2.7V
R406
R455 0 HF_MODE
PM_ON_SW_N
1 2
+5V_PWR IN OUT
NA FL500
RA503 3 4
G1 G2
1 2
AUXIP
3 4 NFM21PC105B1A3
AUXIN
5 6
AUXOP
UART1 7 8
AUXON USB_D-
3G 2.5G
1
GND GND
2
RX RX UART_RXD
3
TX TX UART_TXD
4
UFLS NC1 USB_D+
5
ON_SW ON_SW USB_VBUS_IN
6
VBAT VBAT UART_DCD_N
7 R408 NA
PWR USB_VBUS UART_RI
NC2
8
URXD NC3 USB_D-
9
UTXD NC4 USB_D+ UART_RFR_N
10
DSR
11
RTS
12
CTS UART_CTS_N
UART_DTR
VBATT
VREG_MSMP_2.7V
CN501
1
5
VBATT_SENSE
2
CHARGER_THERM
4
3
R412
C420 C421
680K
47n 33p
Battery level check !!!!! Battery temperature sensor !!!!!
OJ501 OJ502
OJ503 OJ504
9
- 145 -
13 14 15 16
(For Hall Sensor)
R504
VREG_MSMP_2.7V
100K
U504 A3212EEH-T
R402
1 6
FOLDER_DETECT OUTPUT VDD
2 5
C489 NC1 NC2 62
4
0.01u GND2
3 7
GND1 PGND
VREG_MSMP_2.7V
C DTC114EE
B
HF_MODE
E
0 ohm
2 U505
4
6 1 6
8
2 5
0 ohm
2 3 4
4
6
8 RCLAMP0504F CN502
25
GND
R405 0 1
BATT_ID
NA 2
HF_MODE
3
DSR
4
PWR_+5V_1
5
PWR_+5V_2
6
ON_SW1
2012 7
PCM_RXA_IN
8
PCM_CLK
9
PCM_SYNC
10
USB_RX
11
PCM_TXA_OUT
12
PWR_GND_1
13
RXD
14
TXD
15
USB_TX
16
USB_PWR
17
DCD
18
RI_TMS
19
PWR_GND_2
20
RFR_RTS
21
PWR_+4_2V_1
22
PWR_+4_2V_2
23
CTS
24
DTR
GND
26
ENRY0004501
GT05M-24P-E1500
CAD for EMC Noise
Between (VBATT & +5V_PWR) and (Mic signal)
Section Date Sign & Name Sheet/
Sheets
TU550
10/31
CU500
MODEL
SH NAM
Designer
2005
5/6
Checked
DRAWING
PERIPHERAL
NAME
Approved
DRAWING
LG Electronics Inc. MAIN_1.2
NO.
LG Electronics Inc.
LGE Internal Use Only
A
B
C
D
E
F
C
D
E