LG 42LV375H-ZA (CHASSIS:LD03X) 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.
+3.5V_ST
3.3K
OPT
R2426
0 . 1 u F
16V
C2410
OPT
10K
R2416
OPT
2SC3052
Q2401
E
B
C
1000pF
50V
C2404
IR_OUT
BLM18PG121SN1D
L2401
LED_B/LG_LOGO
0
R2422
OPT
47K
R2429
0 . 1 u F
C2402
LED_R/BUZZ
0 . 1 u F
16V
C2405
100
R2410
100
R2401
47K
R2408
BLM18PG121SN1D
L2402
12507WR-12L
P2401
12P_IR
1
2
3
4
5
6
7
8
9
10
11
12
13
10K
R2407
0
OPT
R2427
CDS3C05HDMI1
5.6V
5.6V
D2404
0 . 1 u F
C2401
100pF
50V
C2407
AMOTECH
5.6V
D2402
+3.5V_ST
+3.5V_ST
1000pF
50V
50V
OPT
C2409
BLM18PG121SN1D
L2404
100
R2402
2SC3052
Q2402
E
B
C
KEY2
007:AA15
+3.5V_ST
+3.5V_ST
CDS3C05HDMI1
5.6V
D2403
IR
1000pF
50V
50V
OPT
C2408
0 . 1 u F
16V
C2403
1.5K
R2413
22
R2403
+3.5V_ST
AMOTECH
5.6V
D2401
2SC3052
Q2405
E
B
C
22
R2428
47K
R2431
47K
R2409
1000pF
50V
C2406
10K
R2430
AMOTECH
5.6V
D2405
1.5K
R2414
KEY1
007:AA15
+3.5V_ST
+3.3V_NORMAL
2SC3052
Q2406
E
B
C
BLM18PG121SN1D
L2403
EPHY_TXOP1
013:U15
5.6V
D4705
LAN_ACT1
013:AM23
510
R4701
5.6V
D4700
XRJV-01V-D12-180
JK4700
1
2
3
4
5
6
7
8
D1
D2
D3
D4
9
EPHY_TXON1
013:U15
5.6V
D4703
D3.3V
LAN_LINK1
013:AM23
5.6V
D4702
5.6V
D4701
510
R4700
5.6V
D4704
CIC21J501NE
L4701
100
R2432
100
R2433
SCL1_3.3V
SDA1_3.3V
EPHY_RXIP1
EPHY_RXIN1
A1.8_ETHUB
4 9 . 9
1%
1%
R4706
4 9 . 9
1%
1%
R4707
0 . 1 u F
C4702
4 9 . 9
1%
1%
R4708
4 9 . 9
1%
1%
R4709
0 . 1 u F
C4703
0 . 1 u F
16V
C4701
0 . 1 u F
16V
16V
C4700
XRJV-01V-D12-180
JK4701
1
2
3
4
5
6
7
8
D1
D2
D3
D4
9
CIC21J501NE
L4702
0 . 1 u F
16V
16V
C4712
4 9 . 9
1%
1%
R4714
4 9 . 9
1%
1%
R4715
5.6V
D4710
4 9 . 9
1%
1%
R4716
4 9 . 9
1%
1%
R4717
5.6V
D4712
5.6V
D4711
0 . 1 u F
C4710
0 . 1 u F
C4711
5.6V
D4713
0 . 1 u F
16V
C4713
510
R4718
510
R4719
D3.3V
5.6V
D4714
5.6V
D4715
A1.8_ETHUB
EPHY_TXOP0
EPHY_TXON0
EPHY_RXIP0
EPHY_RXIN0
LAN_LINK0
LAN_ACT0
12507WR-15L
15P_IR
P2402
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
18pF
50V
50V
OPT
C2412
18pF
50V
50V
OPT
C2413
CDS3C05HDMI1
5.6V
5.6V
15P_IR
D2406
CDS3C05HDMI1
5.6V
5.6V
15P_IR
D2407
100
R2435
OPT
100
R2436
15P_IR
100
R2437
OPT
100
R2438
15P_IR
CLOCK_SCL
CLOCK_SDA
S/T_SCL
S/T_SDA
1K
R2425
1K
R2406
10K
R2404
10K
R2405
Z e n e r D i o d e i s
c l o s e t o w a f e r
IR & LED
CONTROL
A d j a c e n t T X / R X d i f f e r e n t i a l p a i r s s h o u l d b e s e p a r a t e d b y m o r e t h
1 5 m i l s t o e a c h o t h e r
ETHERNET CONNECT
T r a c e i m p e d a n c e : 1 0 0 o h m d i f f e r e n c t i a l i m p e d a n c e t o G N D p l a n
5 m i l s t r a c e w i d t h w i t h 7 m i l s a i r g a p o n P / N p a i r .
Chameleon(EU_GP2_BCM3556)
2 0 1 0 . 1 2 . 2 0
xxLV375H-ZA
6
I R / E t h e r n e t
rol&IR/LED
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.
TOOL0
22
R749
4.7K
R735
OPT
M41T81
IC701
3
VBAT
2
XO
4
VSS
1
XI
5
SDA
6
SCL
7
IRQ/FT/OUT/SQW
8
VCC
10K
OPT
R718
UART_DBG_SW
22
R775
IR_OUT_RS232C
1M
R748
22
R729
+3.5V_ST
22
R739
100K
R750
NEC_TX
IR_OUT_HDMI1
4.7K
R716
22
R725
22
R710
FLMD0
AMP_MUTE
0
R799
LED_R/BUZZ
NEC_EEPROM_SDA_2
0 . 1 u F
C704
BATTERY
BA700
1
2
SCART1_MUTE
100
R743
4.7K
R736
22
R713
NEC_RX
22
R787
OPT
4.7K
R737
22
R753
0 . 1 u F
C706
22
R796
EXT12V_CTRL
22
R738
22
R762
22
R790
IR_OUT_CTRL
100
R745
OPT
SUBAMP_SD
TOOL0
BCM_NEC_TX
10K
R731
22
R747
+3.5V_ST
10K
R703
SOC_RESET
100
R746
OPT
22
R772
22
R727
FLMD0
KEY1
PANEL_CTL
POWER_ON/OFF2_1
22
R773
0
R759
0
R758
22
R760
CLOCK_SCL
NEC_RXD_DBG
22
R791
EXT5V_CTRL
22
R742
EAW39040101
32.768KHz
X700
OLD_CRYSTAL
IR_OUT
0
R798
POWER_ON/OFF2_2
JTP-1127WEM
SW700
1
2
4
3
0 . 1 u F
C708
SUBAMP_MUTE
22
R723
+3.5V_ST
100
R744
4.7K
R734
OPT
DBG_SW
KEY2
POWER_DET
1K
R701
CLOCK_SDA
22
R761
22
R786
OPT
+3.5V_ST
+3.5V_ST
UPD78F1164GF(S)
NEC_SUB MICOM
IC703
1
P60/SCL0
2
P61/SDA0
3
P62
4
P63
5
P31/TI03/TO03/INTP4
6
P64/RD
7
P65/WR0
8
P66/WR1
9
P67/ASTB
10
P77/EX23/KR7/INTP11
11
P76/EX22/KR6/INTP10
12
P75/EX21/KR5/INTP9
13
P74/EX20/KR4/INTP8
14
P73/EX19/KR3
15
P72/EX18/KR2
16
P71/EX17/KR1
17
P70/EX16/KR0
18
P06/WAIT
19
P05/CLKOUT
20
EVSS1
21
P80/EX0
22
P81/EX1
23
P82/EX2
24
P83/EX3
25
P84/EX4
26
P85/EX5
27
P86/EX6
28
P87/EX7
29
P30/INTP3/RTC1HZ
30
EVDD1
31
P50/EX8
32
P51/EX9
33
P52/EX10
34
P53/EX11
35
P54/EX12
36
P55/EX13
37
P56/EX14
38
P57/EX15
39
P17/EX31/TI02/TO02
40
P16/EX30/TI01/TO01/INTP5
41
P15/EX29/RTCDIV/RTCCL
42
P14/EX28/RXD3
43
P13/EX27/TXD3
44
P12/EX26/SO00/TXD0
45
P11/EX25/SI00/RXD0
46
P10/EX24/SCK00
47
AVREF1
48
P110/ANO0
49
P111/ANO1
50
AVREF0
51
AVSS
52
P157/ANI15
53
P156/ANI14
54
P155/ANI13
55
P154/ANI12
56
P153/ANI11
57
P152/ANI10
58
P151/ANI9
59
P150/ANI8
60
P27/ANI7
61
P26/ANI6
62
P25/ANI5
63
P24/ANI4
64
P23/ANI3
65
P22/ANI2
66
P21/ANI1
67
P20/ANI0
68
P130
69
P131/TI06/TO06
70
P04/SCK10/SCL10
71
P03/SI10/RXD1/SDA10
72
P02/SO10/TXD1
73
P01/TO00
74
P 0 0 / T I 0 0
75
P145/TI07/TO07
76
P144/SO20/TXD2
77
P143/SI20/RXD2/SDA20
78
P142/SCK20/SCL20
79
P141/PCLBUZ1/INTP7
80
P140/PCLBUZ0/INTP6
81
P120/INTP0/EXLVI
82
P47/INTP2
83
P46/INTP1/TI05/TO05
84
P45/SO01
85
P44/SI01
86
P43/SCK01
87
P42/TI04/TO04
88
P41/TOOL1
89
P40/TOOL0
90
RESET
91
P124/XT2
92
P123/XT1
93
FLMD0
94
P122/X2/EXCLK
95
P121/X1
96
REGC
97
VSS
98
EVSS0
99
VDD
100
EVDD0
4.7K
R771
CEC_REMOTE
22
R752
+3.5V_ST
I2C_SW
13pF
C707
10K
R706
+3.5V_ST
0 . 1 u F
16V
16V
C703
NEC_TXD_DBG
IR_OUT_CTRL
IR_OUT_HDMI2
EXT_PWR_DET
22
R756
2SC3052
Q700
E
B
C
EDID_WP
22
R795
22
R726
2SC3052
Q701
E
B
C
FLASH_WP
22
R757
4.7K
R715
22
R755
22
R720
OPT
22
R721
47K
R754
AMP_RESET_N
22
R741
TOOL1
MICOM_RESET
10MHz
X701
22
R719
OPT
22
R722
POWER_ON/OFF1
13pF
C709
12507WS-06L
P701
1
2
3
4
5
6
7
SIDE_HP_MUTE
BCM_NEC_RX
+3.5V_ST
+3.5V_ST
NEC_EEPROM_SCL_2
22
R712
22
R730
22
R717
22
R733
22
R797
OPT
IR
CLOCK_SCL
22
R785
OPT
LED_B/LG_LOGO
22
R724
INV_CTL
MICOM_RESET
22
R794
OPT
22
R751
4.7K
R770
0 . 1 u F
16V
16V
C710
22
R776
0 . 1 u F
C705
CLOCK_SDA
RL_ON
10K
OPT
R740
TOOL1
22
R774
74AC08SJ
IC702
3
O0
2
B0
4
A1
1
A0
6
O1
5
B1
7
GND
8
O3
9
B3
10
A3
11
O2
12
B2
13
A2
14
VCC
10K
R702
OPT
22
R728
22
R779
OPT
22
R780
OPT
22
R781
OPT
22
R783
OPT
22
R782
OPT
UART_SW2
10
R763
10
R767
10
R765
10
R766
10
R768
10
R764
CB3216PA501E
L700
10
R769
KID65003AF
IC705
3
I 3
2
I 2
4
I 4
1
I 1
6
I 6
5
I 5
7
I 7
8
GND
9
COMMON
10
O7
11
O6
12
O5
13
O4
14
O3
15
O2
16
O1
+3.5V_ST
+5V_ST
10uF
25V
25V
C721
CIC21J501NE
L702
+5V_ST
+5V_ST
ETHUB_RESET
ENDEFER
0
R732
THERMAL
SC632ULTRT
IC706
3
C1-
2
C1+
4
IN
1
GND
5
EN
6
OUT
7
C2+
8
C2-
9
[EP]GND
2pF
50V
50V
C701
2pF
50V
50V
C700
ETHUB_MDIO_NEC
22
R7019
22
R7018
22
R7020
ETHUB_PWR_ON/OFF
22
R7021
ETHUB_SW
ETHUB_MDC_NEC
10K
R7027
10K
R7028
10K
R7029
10K
R7030
10K
R7031
4.7K
R7022
4.7K
R7023
4.7K
R7024
4.7K
R7025
4.7K
R7026
2SC3875S(ALY)
Q714
E
B
C
2SC3875S(ALY)
Q715
E
B
C
2SC3875S(ALY)
Q716
E
B
C
2SC3875S(ALY)
Q717
E
B
C
2SC3875S(ALY)
Q713
E
B
C
10K
R7032
10K
R7033
10K
R7034
10K
R7035
10K
R7036
+5V_ST
22
R7037
OPT
2 . 2 u F
10V
C715
2 . 2 u F
10V
10V
C720
12507WR-12L
P700
1
2
3
4
5
6
7
8
9
10
11
12
13
2SA1504S
Q704
E
B
C
2SA1504S
Q703
E
B
C
2SA1504S
Q705
E
B
C
2SA1504S
Q706
E
B
C
2SA1504S
Q702
E
B
C
100
R7040
100
R7041
100
R7042
100
R7043
100
R7044
+5V_ST
SYS_RESET_BCM
22
R788
EAW30067102
32.768KHz
X700-*1
NEW_CRYSTAL
2SC3052
Q711
E
B
C
10K
R778
SOC_RESET
10K
R777
MBRA340T3G
D701
MBRA340T3G
D702
+5V_USB
0 . 1 u F
C723
S/T_SCL
S/T_SDA
S/T_SDA
PKLCS1212E4001-R1
BU700
1
2
22
R789
+3.5V_ST
4.7K
R7101
4.7K
R7100
5
C l o s e d t o C r y s t a l
xxLV375H-ZA
NEC MICOM
REAL TIME CLOCK
Chameleon(EU_GP2_BCM3556)
IR_OUT
2 0 1 0 . 1 2 . 2 0
ST_5V
275mA
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.
HDMI1_RX0+_BCM
0 . 1 u F
16V
16V
C804
0
R858
0
R840
0
R808
0
R846
SCL_HDMI_2
0 . 1 u F
16V
16V
C808
HDMI2_RX2+_BCM
CEC
0
R811
0
OPT
R864
HDMI1_RX2-_BCM
TMDS2_RX2-
HDMI2_SDA_BCM
0 . 1 u F
16V
16V
C830
SDA_HDMI_2
+3.3V_NORMAL
HDMI2_SCL_BCM
47K
R836
0.1uF
C819
SDA_HDMI_2
SCL_HDMI_2
TMDS2_RX1+
0 . 1 u F
16V
16V
C806
HDMI1_RX1-_BCM
+1.8V_HDMI
+3.3V_HDMI
HDMI2_RXC-_BCM
0.1uF
C817
TMDS2_RX0-
HDMI1_SCL_BCM
0 . 1 u F
16V
16V
C822
HDMI1_RX0-_BCM
0.1uF
C812
HDMI1_SCL_BCM
0 . 1 u F
C809
0
R807
0 . 1 u F
C825
0 . 1 u F
C821
HDMI1_RX1+_BCM
0.1uF
C813
HDMI2_RX0+_BCM
0
R857
5V_HDMI_2
0 . 1 u F
16V
16V
C829
TMDS2_RX2-
HDMI2_RX1-_BCM
TMDS2_RXC+
+1.8V_HDMI
0 . 1 u F
C827
TMDS2_RX1-
0
OPT
R867
R867
HDMI_HPD_1
0 . 1 u F
C826
HDMI_HPD_2
0 . 1 u F
16V
16V
C816
0.1uF
C815
YKF45-7058V
JK800
14
NC
13
CE_REMOTE
5
D1_GND
20
SHIELD
GND
12
CK-
11
CK_GND
2
D2_GND
19
HP_DET
18
5V
10
CK+
4
D1+
1
D2+
17
GND
9
D0-
8
D0_GND
3
D2-
16
DDC_DATA
7
D0+
6
D1-
15
DDC_CLK
47K
R833
SDA_HDMI_2
0 . 1 u F
C805
0 . 1 u F
C824
HDMI2_RXC+_BCM
HDMI2_RX2-_BCM
5V_HDMI_1
0
R806
TMDS2_RXC+
0
R809
YKF45-7058V
JK802
14
NC
13
CE_REMOTE
5
D1_GND
20
SHIELD
GND
12
CK-
11
CK_GND
2
D2_GND
19
HP_DET
18
5V
10
CK+
4
D1+
1
D2+
17
GND
9
D0-
8
D0_GND
3
D2-
16
DDC_DATA
7
D0+
6
D1-
15
DDC_CLK
+5V_NORMAL
0 . 1 u F
16V
16V
C820
+3.3V_HDMI
CEC
+1.8V_AMP
HDMI1_RXC+_BCM
12K
R865
TMDS2_RX0+
0
R843
HDMI2_RX0-_BCM
47K
R825
HDMI2_RX1+_BCM
BLM18PG121SN1D
L801
TMDS2_RX1-
BLM18PG121SN1D
L800
5V_HDMI_2
TMDS2_RX2+
SCL_HDMI_2
0
R810
0 . 1 u F
16V
16V
C828
HDMI1_SDA_BCM
TMDS2_RXC-
TMDS2_RX0-
TMDS2_RX1+
+1.8V_HDMI
47K
R827
TMDS2_RX0+
HDMI1_SDA_BCM
HDMI1_RXC-_BCM
0 . 1 u F
16V
16V
C818
HDMI1_RX2+_BCM
TMDS2_RXC-
0.1uF
C811
TMDS2_RX2+
5V_HDMI_1
0
R844
0
R845
D825
+3.5V_ST
CEC
CEC_REMOTE
IR_OUT_HDMI1
IR_OUT_HDMI2
KRC104S
Q801
E
B
C
KRC104S
Q802
E
B
C
1K
R800
5.5V
D801
OPT
5.5V
OPT
D802
4.7K
R801
5V_HPD_1
KRC104S
Q804
E
B
C
1K
R802
KRC104S
Q803
E
B
C
5.5V
OPT
D803
5.5V
OPT
D804
4.7K
R812
HDMI_HPD_2
5V_HPD_2
5V_HDMI_2
ENKMC2838-T112
D4706
A1
C
A2
ENKMC2838-T112
D4707
A1
C
A2
+5V_NORMAL
5V_HPD_2
+5V_NORMAL
BSS83
Q800
S
B
D
G
+5V_NORMAL
0
R856
OPT
22
R860
22
R859
3
3
R852
3
3
R850
3
3
R849
3
3
R851
3
3
R854
33
R853
22K
R892
SCL2_3.3V
SDA2_3.3V
TDA19997
IC800
1
VSS_1
2
OUT_C+
3
OUT_C-
4
VDDO[3V3]
5
OUT_DDC_CLK
6
OUT_DDC_DAT
7
VSS_2
8
VDDDC[1V8]_1
9
RXA_HPD
10
RXA_5V
11
RXA_DDC_DAT
12
RXA_DDC_CLK
13
RXA_C-
14
RXA_C+
15
VDDH[3V3]_1
16
RXA_D0-
17
RXA_D0+
18
VSS_3
19
RXA_D1-
20
RXA_D1+
21
VDDH[3V3]_2
22
RXA_D2-
23
RXA_D2+
24
VDDH[1V8]_1
25
AUX_5V
26
VSS_4
27
TEST1
28
RXB_HPD
29
RXB_5V
30
RXB_DDC_DAT
31
RXB_DDC_CLK
32
RXB_C-
33
RXB_C+
34
VDDH[3V3]_3
35
RXB_D0-
36
RXB_D0+
37
VSS_5
38
RXB_D1-
39
RXB_D1+
40
VDDH[3V3]_4
41
RXB_D2-
42
RXB_D2+
43
VSS_6
44
CDEC_DDC
45
VDDDC[1V8]_2
46
VDDDC[1V8]_4
47
TEST2
48
PD
49
I2C_SDA
50
I2C_SCL
51
RXE_DDC_CLK
52
RXE_DDC_DAT
53
INT_N/MUTE
54
CDEC_STBY
55
VDDS[3V3]
56
VSS_7
57
CEC
58
RXC_HPD
59
RXC_5V
60
RXC_DDC_DAT
61
RXC_DDC_CLK
62
RXC_C-
63
RXC_C+
64
VDDH[3V3]_5
65
RXC_D0-
66
RXC_D0+
67
VSS_8
68
RXC_D1-
69
RXC_D1+
70
VDDH[3V3]_6
71
RXC_D2-
72
RXC_D2+
73
VSS_9
74
R12K
75
VDDH[1V8]_2
76
RXD_HPD
77
RXD_5V
78
RXD_DDC_DAT
79
RXD_DDC_CLK
80
RXD_C-
81
RXD_C+
82
VDDH[3V3]_7
83
RXD_D0-
84
RXD_D0+
85
VSS_10
86
RXD_D1-
87
RXD_D1+
88
VDDH[3V3]_8
89
RXD_D2-
90
RXD_D2+
91
VDDDC[1V8]_3
92
VSS_11
93
OUT_D2+
94
OUT_D2-
95
VDDO[1V8]
96
OUT_D1+
97
OUT_D1-
98
VSS_12
99
OUT_D0+
100
OUT_D0-
+3.3V_HDMI
4.7K
R834
4.7K
R835
0 . 1 u F
16V
16V
C802
0 . 1 u F
16V
16V
C803
BLM18PG121SN1D
L802
3.3K
R842
3.3K
R841
100K
R893
5V_HPD_1
8
NO FLANGE
HDMI2
HDMI S/W
NO FLANGE
For CEC
MECHANICAL : HDMI1
MECHANICAL : HDMI2
MECHANICAL : HDMI2
MECHANICAL : HDMI1
xxLV375H-ZA
2 0 1 0 . 1 2 . 2 0
HDMI
Chameleon(EU_GP2_BCM3556)
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