LG 42LT770H (CHASSIS:LA2FF) Service Manual ▷ View online
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.
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.
IR
+3.5V_ST
+3.5V_ST
R4105
22
IR_OUT
+3.5V_ST
R4102
10K
OPT
R4108
0
0
COMMERCIAL_US
R4111
10K
COMMERCIAL_EU
+3.5V_ST
+3.5V_ST
R4104
47K
OPT
R4100
0
0
R4109
1K
COMMERCIAL_EU
R4119
47K
R4115
1K
Q4102
2SC3052
COMMERCIAL_EU
E
B
C
Q4104
2SC3052
E
B
C
Q4100
2SC3052
OPT
E
B
C
Q4101
2SC3052
OPT
E
B
C
R4107
3.3K
OPT
R4103
47K
OPT
OPT
R4101
47K
OPT
OPT
C4102
0.1uF
C4100
0.1uF
R4114
100
100
P4102
12507WR-10L
1
2
3
4
5
6
7
8
9
10
11
D4101
5.6V
AMOTECH
R4125
1.5K
OPT
D4100
5.6V
AMOTECH
R4126
1.5K
L4100
BLM18PG121SN1D
C4107
100pF
100pF
50V
D4106
5.6V
CDS3C05HDMI1
C4101
0.1uF
16V
D4104
5.6V
AMOTECH
R4124
100
C4103
0.1uF
16V
OPT
LED_W/LG_LOGO
D4105
5.6V
CDS3C05HDMI1
KEY2
R4123
100
KEY1
R4113
100
100
I2C_SDA2
I2C_SCL2
+3.5V_ST
C4104
1000pF
50V
LED_R
C4108
1000pF
50V
C4109
0.1uF
16V
C4110
0.1uF
16V
OPT
L4101
BLM18PG121SN1D
+3.3V_NORMAL
I2C_SDA3
I2C_SCL3
R4127
100
OPT
R4128
100
OPT
R4129
0
+3.5V_ST
R4118
10K
1%
R4117
10K
1%
L4102
BLM18PG121SN1D
L4103
BLM18PG121SN1D
IR & KEY
COMMERCIAL
Zener Diode is
close to wafer
41
IR / KEY
2011.09.26
To SOC
xxLT760H-UA
THERMAL
USB DOWN STREAM
THERMAL
THERMAL
USB DOWN STREAM
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.
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_DP1
C4339
10uF
10V
WIFI
WIFI_DP
WIFI_DM
D4303
RCLAMP0502BA
OPT
P4301
12507WR-04L
WIFI
1
VDD
2
DM
3
DP
4
GND
5
.
C4320
0.1uF
16V
0.1uF
16V
WIFI
C4321
10uF
10V
WIFI
L4302
BLM18PG121SN1D
WIFI
C4319
0.1uF
16V
0.1uF
16V
WIFI
R4327
10K
OPT
OPT
R4323
10K
USB_CTL1
/USB_OCD1
C4323
10uF
10V
R4341
27K
1/10W
OPT
R4300
27K
1/10W
IC4303
TPS2554
3
IN_2
2
IN_1
4
ILIM_SEL
1
GND
5
EN
6
ILIM1
7
ILIM0
8
OUT_1
9
OUT_2
10
FAULT
11
[EP]
+3.3V_NORMAL
+5V_USB
D4300
RCLAMP0502BA
OPT
R4302
33
M_REMOTE_DEV
R4303
33
M_REMOTE_DEV
USB2SER_DP
USB2SER_DM
C4318
22pF
M_REMOTE
C4317
22pF
M_REMOTE
R4301
1.5K
M_REMOTE
+3.3V_NORMAL
L4301
BLM18PG121SN1D
M_REMOTE
R4304
10K
M_REMOTE
R4305
1M
1%
OPT
X4300
12MHz
M_REMOTE
C4316
20pF
M_REMOTE
M_REMOTE_TX
M_REMOTE_RX
C4315
20pF
M_REMOTE
R4308
100K
1%
OPT
R4307
91K
1%
OPT
R4306
10K
M_REMOTE
+3.3V_USB2SER
R4309
15K
M_REMOTE
C4314
1uF
M_REMOTE
+3.3V_USB2SER
+3.3V_USB2SER
+3.3V_USB2SER
+3.3V_USB2SER
/USB2SER_RESET
C4309
0.1uF
16V
0.1uF
16V
M_REMOTE
C4313
0.1uF
16V
0.1uF
16V
M_REMOTE
R4310
10K
M_REMOTE
C4312
0.1uF
16V
M_REMOTE
0.1uF
16V
M_REMOTE
C4310
0.01uF
25V
0.01uF
25V
M_REMOTE
C4311
0.1uF
16V
0.1uF
16V
M_REMOTE
JK4303
3AU04S-345-ZC-H-LG
1
2
3
4
5
R4329
10K
C4328
0.1uF
0.1uF
C4327
1uF
10V
10V
C4333
22uF
10V
22uF
10V
C4326
0.1uF
50V
0.1uF
50V
C4334
22uF
10V
10V
C4329
3300pF
50V
R4328
100K
L4305
BLM18PG121SN1D
C4332
22pF
50V
22pF
50V
R4344
10K
IC4305
TPS54425PWPR
3
VREG5
2
VFB
4
SS
1
VO
6
PG
5
GND
7
EN
8
PGND1
9
PGND2
10
SW1
11
SW2
12
VBST
13
VIN1
14
VIN2
15
[EP]PGND
POWER_ON/OFF2_4
C4324
10uF
16V
16V
+12V
+3.5V_ST
L4308
2uH
+5V_USB
+5V_USB
USB_CTL2
IC4306
TPS2554
3
IN_2
2
IN_1
4
ILIM_SEL
1
GND
5
EN
6
ILIM1
7
ILIM0
8
OUT_1
9
OUT_2
10
FAULT
11
[EP]
R4313
27K
1/10W
OPT
USB_DM2
+3.3V_NORMAL
D4304
RCLAMP0502BA
OPT
/USB_OCD2
R4311
10K
OPT
OPT
R4314
27K
1/10W
USB_DP2
C4340
10uF
10V
R4312
10K
JK4304
3AU04S-345-ZC-H-LG
1
2
3
4
5
+5V_USB
+5V_USB
R4330
120K
120K
1%
R4331
22K
22K
1%
IC4304
TUSB3410RHBR
M_REMOTE
1
VREGEN
3
VCC_1
7
DM
9
RESET
10
SDA
11
SCL
12
WAKEUP
13
CTS
14
DSR
15
DCD
16
RI/CP
17
SIN/IR_SIN
18
GND_2
19
SOUT/IR_SOUT
20
RTS
21
DTR
22
CLKOUT
23
TEST0
24
TEST1
25
VCC_2
26
X2
27
X1/CLKI
28
GND_3
29
P3.4
30
P3.3
31
P3.1
32
P3.0
5
PUR
8
GND_1
6
DP
4
VDD18
2
SUSPEND
33
[EP]
43
USB3_HUB_WiFi
2011.09.29
MAX 0.4A
USB_WIFI
DVR Ready
+5V_USB FOR USB
MAX 1.8A
USB2
For EMI
To SOC
To SOC
xxLT760H-UA
USB To SERIAL I/F
R1
R2
4A
Vout=(0.763+0.0017*Vout.set)*(1+R1/R2)=4.98V
DVR Ready
MAX 1.8A
USB1
To SOC
(HUB)
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.
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.
M_RFModule_ISP
M_REMOTE_RX
M_REMOTE_TX
+3.3V_NORMAL
L4800
120-ohm
M_REMOTE
M_RFModule_RESET
C4800
0.1uF
P4800
12507WR-08L
M_REMOTE
1
3.3V
2
GND
3
RX
4
TX
5
RESET
6
DC
7
DD
8
GND
9
AR4800
100
1/16W
100
1/16W
M_REMOTE
3D_SYNC_RF
3D_SYNC_RF
M_REMOTE_TX
M_REMOTE_RX
ZigBee_Radio Pulse M_REMOTE OPTION
ALL M_REMOTE OPTION
48
MOTION REMOTE
2011.06.04
Only For PDP
xxLT760H-UA
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.
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.
D5402
100V
1N4148W
OPT
R5402
100
0.1uF
C5421
50V
R5411
12
C5434
0.47uF
50V
C5408
33pF
50V
33pF
50V
R5407
12
C5403
1000pF
50V
R5405
100
R5406
3.3
3.3
OPT
R5413
12
R5403
100
R5414
12
0.1uF
C5419
50V
C5427
1uF
25V
1uF
25V
C5425
22000pF
22000pF
50V
C5416
22000pF
50V
C5422
10uF
35V
10uF
35V
0.1uF
C5436
50V
+3.3V_NORMAL
C5426
22000pF
50V
22000pF
50V
L5402
NRS6045T100MMGK
10.0uH
R5412
12
C5423
10uF
35V
0.1uF
C5400
50V
C5432
390pF
50V
0.1uF
C5437
50V
0.1uF
C5418
50V
R5409
12
0.1uF
C5401
50V
SPK_L-
C5402
100pF
50V
C5406
33pF
50V
33pF
50V
C5405
10uF
10V
OPT
D5400
100V
1N4148W
OPT
C5404
1000pF
50V
C5430
390pF
50V
C5429
390pF
50V
L5405
NRS6045T100MMGK
10.0uH
SPK_R-
+24V_AMP
L5403
NRS6045T100MMGK
10.0uH
C5411
0.1uF
16V
AUD_MASTER_CLK
0.1uF
C5438
50V
SPK_R-
AUD_SCK
D5401
100V
1N4148W
OPT
R5404
3.3K
AUD_LRCK
C5415
1000pF
50V
R5401
10K
I2C_SDA1
0.1uF
C5413
16V
AUD_LRCH
L5401
BLM18PG121SN1D
+24V_AMP
SPK_R+
C5431
390pF
50V
+24V_AMP
D5403
100V
1N4148W
OPT
C5414
10uF
10V
10uF
10V
OPT
R5408
12
C5433
1uF
25V
1uF
25V
L5404
NRS6045T100MMGK
10.0uH
SPK_L-
C5435
0.47uF
50V
C5428
1uF
25V
25V
I2C_SCL1
C5409
10uF
10V
OPT
SPK_L+
P5400
WAFER-ANGLE
1
2
3
4
AMP_MUTE
0.1uF
C5439
50V
C5417
22000pF
50V
R5400
10K
R5410
12
SPK_R+
0.1uF
C5412
16V
+24V
C5410
10uF
10uF
10V
OPT
0.1uF
C5420
50V
SPK_L+
C5424
0.01uF
50V
0.01uF
50V
OPT
L5400
CIS21J121
Q5400
MMBT3904(NXP)
E
B
C
4.7uF
C5407
10V
R5418
5.1K
R5415
5.1K
R5416
5.1K
R5417
5.1K
AMP_RESET_SOC
R5421
33
R5422
10K
10K
IC5400
NTP-7500L
1
AGND_PLL
2
AVDD_PLL
3
DVDD_PLL
4
LF
5
DGND_PLL
6
GND_1
7
DGND
8
DVDD
9
SDATA
10
WCK
11
BCK
12
SDA
13
SCL
14
/FAULT
15
MONITOR0
16
MONITOR1
17
MONITOR2
18
BST2B
19
PGND2B
20
OUT2B_1
21
OUT2B_2
22
PVDD2_1
23
PVDD2_2
24
PVDD2_3
25
OUT2A_1
26
OUT2A_2
27
PGND2A
28
BST2A
29
VDR2
30
AGND
31
VCC_5
32
VDR1
33
BST1B
34
PGND1B
35
OUT1B_1
36
OUT1B_2
37
PVDD1_1
38
PVDD1_2
39
PVDD1_3
40
OUT1A_1
41
OUT1A_2
42
PGND1A
43
BST1A
44
/RESET
45
AD
46
GND_IO
47
CLK_I
48
VDD_IO
49
[EP]
+3.5V_ST
SPEAKER_R
DUAL COMPONENT
Q1801
0x54
SPEAKER_L
1ST : 0TRIY80001A 2ND : 0TR387500AA
54
AMP_NEO
2011.04.30
From SOC
xxLT760H-UA
Click on the first or last page to see other 42LT770H (CHASSIS:LA2FF) service manuals if exist.