LG 42LY750H Service Manual page 35

WIFI(Netcast 4.0 WIFI Module)
MAX 0.4A
JP4300 C4301
10uF
10V
P4301
12507WR-06L
1
2
3
ZD4301
4 ADLC 5S 02 015
WIFI_ESD
R4301 22
5
6
7
(Support WOWL)
USB1 Rear
+3.3V_NORMAL
R4327
R4323
10K
10K
OPT
+5V_USB
/USB_OCD1
USB_CTL1
USB_DM1
USB_DP1
To SOC
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
+3.5V_ST_WIFI
L4301
BLM18PG121SN1D
C4302
C4303 C4304
10uF
0.1uF 0.1uF
10V 16V 16V
+3.5V_ST
For EMI
Q4301
PMV48XP
G
C4310
4.7uF
10V
WIFI_DM
WIFI_DP
ZD4302
ADLC 5S 02 015
WIFI_ESD
WOL/WIFI_POWER_ON
C
B Q4302
WIFI_EN
RT1N141C-T112-1
E
IC4303
TPS2554 [EP]
GND FAULT
1 10
IN_1 OUT_2
2 9
IN_2 OUT_1
C4323
3 8
10uF
10V
ILIM_SEL ILIM0
4 7
EN ILIM1
5 6
R4345
100K
+3.5V_ST_WIFI
C4348
0.1uF
50V
IC4302
MP4460DQ-LF-Z EP_GND
close to pin
SW_1
1 10
D4302
SW_2
MBRA340T3G
2 9
C4311
0.1uF
EN
16V 3 8
OPT
COMP
4 7
R4346 C4347
18K FB
150pF
5 6
50V
R4347
150K
L4302
C4345
22UH
22uF
25V
USB2 Side
(HUB)
/USB_OCD2
JK4303
USB_CTL2
KJA-UB-0-0037
1
2
USB_DM2
3
USB_DP2
4
5
To SOC
USB POWER(+12V->+5V_USB)
12V_USB
L4305
BLM18PG121SN1D
[EP]PGND
C4324
10uF
16V
Switching noise reducing [MPS recommend]
C4326
R4348
0.1uF
22 50V
+24V
BST
VIN_2
C4349 C4350
VIN_1
3.3uF 0.1uF
50V 50V
R4349
FREQ 200K
12V_USB
1/8W
GND
1%
R4350 R4351
270K 10K
1/16W 1/16W
1% 1%
R4352
C4346 20K
1/16W Vout=(0.763+0.0017*Vout.set)*(1+R1/R2)=4.98V
0.1uF
1%
50V
+3.3V_NORMAL
R4311
R4312
10K
10K
OPT
IC4306
TPS2554 [EP]
+5V_USB
GND FAULT
1 10
IN_1 OUT_2
2 9
IN_2 OUT_1
3 8
ILIM_SEL ILIM0
4 7
EN ILIM1
5 6
IC4305
+5V_USB
TPS54425PWPR
VIN2 VO
14 1
R4331
VIN1 VFB
22K
13 2
1%
R2
VBST VREG5
12 3
C4327
4A
1uF
SW2 SS 10V
11 4
R1
C4332
R4330
SW1 GND
22pF
10 5 +3.5V_ST 120K
R4328 C4329
50V
1%
3300pF
100K
PGND2 PG
50V 10K_OLD 100K_LY75
9 6
R4344 R4344-*1
10K 100K
PGND1 EN
R4329 10K
8 7
C4328
POWER_ON/OFF2_4
0.1uF +5V_USB
L4308
2uH
C4333
C4334
22uF
22uF
10V 10V
C4340
10uF
10V
xxLY750H-UA 2013.12.24
USB/WIFI 10 21
LGE Internal Use Only