LG 55LM8600 Service Manual page 34

+5V_USB FOR USB1
POWER_ON/OFF2_4
R4328
10K
C4327
0.1uF
16V
16V
IC4305
+24V 0.1uF C4329
TPS54331D
L4305
BOOT
1 8
BLM18PG121SN1D
VIN
2 7
3A
C4324
C4326
10uF EN
0.1uF
3 6
35V 50V
SS/TR
4 5
C4328
0.01uF
50V
Vout=0.8*(1+R1/R2)
IC4306
[EP]GND SN1104041, DC-DC+2CH USB SW
+12V
V7V
24
C4341
AGND_3
4.7uF
L4306 23
10V
BLM18PG121SN1D
VIN_2
22
VIN_1
C4325
21
10uF
16V
PGND_2
20
PGND_1
19
BST
+5V_USB 18
C4331
L4307
0.1uF
3.6uH
LX_2
16V
17
DEV_USB_DCDC_BD86180
IC4306-*1
BD86180MUV C4337 C4301
[EP]GND LX_1
22uF 22uF 16
EN VREG
1 24
COMP GND_3 10V 10V
2 23
SS 3 22 VIN_2
SW_IN_3
RT VIN_1
4 21 15
CTL2 PGND_2
5 20
CTL1 6 19 PGND_1
FLG2 BST SW_IN_2
7 18
14
FLG1 8 17 SW_2
USB_OUT2 SW_1
9 16
GND_1 USB_IN_3
10 15 SW_IN_1
13
GND_2 11 14 USB_IN_2
USB_OUT1 USB_IN_1
12 13
ESD for MTK
ESD for LG1152
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.
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
MAX 2A
L4308
6.8uH
PH
C4333 C4336
22uF 0.1uF
10V 16V
GND
COMP
C4332 C4334
VSENSE
47pF 4700pF
50V 50V R1
OPT
R4336
C4338
20K
1000pF
50V
R2
R4332
POWER_ON/OFF2_4
10K
C4300
0.1uF
16V
EN
1
R4342
COMP
10K
2
5%
USB_DCDC_SN1104041
C4340 C4340-*1
SS
C4342
3 4700pF 0.01uF
100pF
50V 50V
50V
USB_DCDC_BD86180
ROSC
4
USB_DCDC_SN1104041
EN_SW2
5
EN_SW1
6
NFAULT2
7
NFAULT1
8
+5V_USB_3
SW_OUT2
9
AGND_1
10
+5V_USB_2
AGND_2
11
SW_OUT1
12
/USB_OCD1
USB_CTL1
USB_DM1
USB_DP1
+3.3V_NORMAL
USB_CTL2
/USB_OCD2
USB_DM2
USB_DP2
From SoC
USB_DM3
USB_DP3
USB_CTL3 WIFI_DM
/USB_OCD3
WIFI_DP
+3.3V_NORMAL
R4327
R4323
10K
10K
OPT
IC4303
TPS2554 [EP]
GND FAULT
1 10
IN_1 OUT_2
2 9
IN_2 OUT_1 C4323
3 8
ILIM_SEL ILIM0
4 7
EN ILIM1
5 6
+5V_USB_2
+5V_USB_3
USB_WIFI
+5V_USB
L4302 WIFI 120-ohm
BLM18PG121SN1D
C4319
C4320
0.1uF
0.1uF
16V
16V
WIFI
WIFI
For EMI
USB3_HUB_WiFi
USB1
10uF DVR Ready
10V
MAX 1.8A
3AU04S-305-ZC-(LG)
JK4303
USB2
MAX 1.5A
3AU04S-305-ZC-(LG)
JK4302
C4322
10uF
10V
USB3
MAX 1.5A
3AU04S-305-ZC-(LG)
JK4300
C4310
10uF
10V
C4339
C4321
MAX 0.4A
10uF 10uF
10V
10V
WIFI WIFI
P4301
12507WR-04L
WIFI
VDD
1
DM
2
DP
3
GND
4
5
.
2011.10.26
43
LGE Internal Use Only