LG 42LT777H Service Manual page 37
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Also See for 42LT777H:
- Commercial mode setup manual (85 pages) ,
- Quick reference manual (40 pages) ,
- Brochure & specs (4 pages)
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USB To SERIAL I/F
+3.3V_NORMAL
+3.3V_USB2SER
M_REMOTE
L4301
C4312
BLM18PG121SN1D
C4311
C4313
0.1uF
0.1uF
0.1uF
16V
16V
16V
M_REMOTE
M_REMOTE
M_REMOTE
+3.3V_USB2SER
+3.3V_USB2SER
C4310
C4309
0.01uF
0.1uF
25V
16V
R4301
M_REMOTE_DEV
M_REMOTE
R4302
33
USB2SER_DP
R4303
33
USB2SER_DM
M_REMOTE_DEV
+3.3V_USB2SER
/USB2SER_RESET
/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.
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 ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C4316
C4315
20pF
M_REMOTE
X4300
20pF
M_REMOTE
M_REMOTE
12MHz
R4305
1M
1%
OPT
VREGEN
TEST1
1
24
THERMAL
SUSPEND
TEST0
2
23
33
VCC_1
CLKOUT
3
22
IC4304
VDD18
DTR
4
21
TUSB3410RHBR
1.5K
PUR
RTS
5
20
M_REMOTE
DP
SOUT/IR_SOUT
6
19
M_REMOTE_TX
DM
GND_2
7
18
GND_1
SIN/IR_SIN
8
17
M_REMOTE_RX
+3.3V_USB2SER
M_REMOTE
R4306
R4309
10K
15K
M_REMOTE
C4314
1uF
M_REMOTE
+3.3V_NORMAL
R4327
10K
R4323
10K
OPT
IC4303
[EP]
TPS2554
+5V_USB
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
USB_WIFI
+5V_USB
L4302
BLM18PG121SN1D
C4319
WIFI
C4339
C4321
MAX 0.4A
C4320
0.1uF
10uF
10uF
0.1uF
16V
16V
10V
10V
WIFI
WIFI
WIFI
WIFI
For EMI
P4301
12507WR-04L
WIFI
VDD
1
DM
2
WIFI_DM
DP
3
WIFI_DP
GND
4
5
To SOC
.
USB2
DVR Ready
MAX 1.8A
/USB_OCD2
USB_CTL2
JK4303
USB_DM2
USB_DP2
To SOC
+5V_USB FOR USB
+12V
L4305
IC4305
BLM18PG121SN1D
[EP]PGND
TPS54425PWPR
VIN2
VO
14
1
VIN1
VFB
13
2
C4324
10uF
16V
VBST
VREG5
12
3
4A
SW2
SS
11
4
C4326
0.1uF
50V
SW1
GND
10
5
PGND2
PG
9
6
PGND1
EN
8
7
Vout=(0.763+0.0017*Vout.set)*(1+R1/R2)=4.98V
+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
C4340
3
8
10uF
10V
ILIM_SEL
ILIM0
4
7
EN
ILIM1
5
6
xxLT760H-UA
USB3_HUB_WiFi
+5V_USB
R4331
22K
1%
R2
C4327
1uF
10V
R1
R4330
C4332
22pF
+3.5V_ST
120K
R4328
C4329
50V
1%
3300pF
100K
50V
R4329
10K
C4328
POWER_ON/OFF2_4
0.1uF
+5V_USB
L4308
2uH
C4333
C4334
22uF
22uF
10V
10V
USB1
(HUB)
DVR Ready
MAX 1.8A
JK4304
2011.09.29
43
LGE Internal Use Only
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