LG Electronics service manual 3A

USB DOWN STREAM
USB DOWN STREAM
USB DOWN STREAM
THERMAL
THERMAL
THERMAL
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
USB_DM1
USB_DP2
USB_DP1
USB_DM2
C4339
10uF
10V
WIFI
USB_DM3
C4333
22uF
10V
WIFI_DP
C4327
0.1uF
16V
+5V_USB
R4339
2K
1%
WIFI_DM
R4330
0
USB_DP3
C4334
4700pF
50V
D4304 40V
SMAB34
C4322
10uF
10V
D4303 RCLAMP0502BA
OPT
C4328
0.01uF
50V
C4336
0.1uF
16V
+5V_USB_3
USB_CTL2
C4324
10uF
35V
P4301
12507WR-04L
WIFI
1
VDD
2
DM
3
DP
4
GND
5
.
C4320
0.1uF
16V
WIFI
C4321
10uF
10V
WIFI
R4329
330K
OPT
R4328
10K
JK4303
3AU04S-305-ZC-(LG)
1234
5
C4310
10uF
10V
JK4302
3AU04S-305-ZC-(LG)
1234
5
C4329
0.1uF
16V
L4302
BLM18PG121SN1D
WIFI120-ohm
C4319
0.1uF
16V
WIFI
C4326
0.1uF
50V
POWER_ON/OFF2_4
D4302 RCLAMP0502BA
OPT
+24V
/USB_OCD2
C4332
47pF
50V
IC4305
TPS54331D
3
EN
2
VIN
4
SS/TR
1
BOOT
5VSENSE
6COMP
7GND
8PH
JK4300
3AU04S-305-ZC-(LG)
1234
5
R4327
10K
OPT R4323
10K
USB_CTL1
L4308
6.8uH
R4336
20K C4338
1000pF
50V
OPT
L4305
BLM18PG121SN1D
D4300 RCLAMP0502BA
OPT
/USB_OCD1
C4323
10uF
10V
+5V_USB_2
+5V_USB_3
+5V_USB_2
C4337
22uF
10V
+5V_USB
+3.3V_NORMAL
/USB_OCD3
C4301
22uF
10V
R4332
10K POWER_ON/OFF2_4
C4331
0.1uF
16V
+12V
L4307
3.6uH
C4341
4.7uF
10V
R4342
10K
5%
L4306
BLM18PG121SN1D
USB_CTL3
C4325
10uF
16V
C4342
100pF
50V
USB_DCDC_SN1104041
IC4306-*1
BD86180MUV
DEV_USB_DCDC_BD86180
3
SS
2
COMP
4
RT
1
EN
6
CTL1
5
CTL2
7
FLG2
8
FLG1
9
USB_OUT2
10
GND_1
11
GND_2
12
USB_OUT1 13USB_IN_1
14USB_IN_2
15USB_IN_3
16SW_1
17SW_2
18BST
19PGND_1
20PGND_2
21VIN_1
22VIN_2
23GND_3
24VREG
25
[EP]GND
C4340
4700pF
50V
USB_DCDC_SN1104041
C4340-*1
0.01uF
50V
USB_DCDC_BD86180
IC4303
TPS2554
3
IN_2
2
IN_1
4
ILIM_SEL
1
GND
5
EN 6ILIM1
7ILIM0
8OUT_1
9OUT_2
10 FAULT
11
[EP]
+3.3V_NORMAL
R4301 10K
R4302 10K R4303 10K
OPT
R4304 10K
OPT
IC4306
USB_DCDC_SN1104041
SN1104041, DC-DC+2CH USB SW
3SS
2COMP
4ROSC
1EN
6EN_SW1
5EN_SW2
7NFAULT2
8NFAULT1
9SW_OUT2
10 AGND_1
11 AGND_2
12 SW_OUT1 13
SW_IN_1
14
SW_IN_2
15
SW_IN_3
16
LX_1
17
LX_2
18
BST
19
PGND_1
20
PGND_2
21
VIN_1
22
VIN_2
23
AGND_3
24
V7V
25
[EP]GND C4300
0.1uF
16V
R4343
820
1%
R4300 27K
1/10W
R4341 27K 1/10W
OPT
R4338 10K
1%
D4300-*2 RCLAMP0502BA
ESD_LG1152
D4304-*1 40V SX34
D4302-*1 RCLAMP0502BA
ESD_LG1152
D4303-*3 RCLAMP0502BA
ESD_LG1152
43
USB3_HUB_WiFi 2011.10.26
MAX 0.4A
From SoC
USB3
USB2
USB_WIFI
MAX 2A
Vout=0.8*(1+R1/R2)
MAX 1.5A
R1
DVR Ready
MAX 1.5A
3A
+5V_USB FOR USB1
MAX 1.8A
R2
USB1
For EMI
ESD for LG1152
ESD for MTK
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only