Read LG 42LT760H-TA (CHASSIS:LB3AF) Service Manual 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.
1K
OPT
R8445
EPHY_RDP
TR0N
EPHY_TDN
4 9 . 9
R8417
0 . 1 u F
C8426
1K
OPT
R8446
1K
OPT
R8452
0 . 1 u F
C8411
P4MODE0
470
R8459
OPT
LAN_ACT0
1K
OPT
R8464
LAN_ACT3
ETNHUB_AVDD33
PHY2PRXD3
2 . 2 u F
25V
25V
C8430
4 9 . 9
1%
1%
R8411
GXFULL
2SC3052
Q8401
E
B
C
EN_AUTOXOVER
0 . 1 u F
C8407
AUTO_NEGO
0 . 1 u F
C8429
0 . 1 u F
C8415
0 . 1 u F
C8413
1K
OPT
R8448
10K
R8409
EPHY_RDN
0 . 1 u F
C8412
ETNHUB_EPHY_RXIP2
EPHY_ACTIVITY
10K
R8407
330
R8432
0 . 1 u F
16V
C8435
0 . 1 u F
C8436
4 9 . 9
R8419
BLM18PG121SN1D
L8406
0 . 1 u F
C8422
0 . 1 u F
C8445
GYFULL
ETNHUB_EPHY_TXON2
4 9 . 9
1%
1%
R8413
0 . 1 u F
16V
C8419
LAN_ACT2
1K
R8444
OPT
0 . 1 u F
C8417
+3.5V_ST
ETNHUB_EPHY_RXIN3
ETNHUB_AVDD18
P4MODE1
0 . 1 u F
C8406
10K OPT
R8471
BLM18PG121SN1D
L8403
2K
R8406
EPHY_LINK
ETNHUB_EPHY_RXIP3
2 . 2 u F
25V
25V
C8400
0 . 1 u F
C8433
THERMAL
MP20045DQ-LF-Z
IC8400
3
VOUT_1
2
VIN_2
4
VOUT_2
1
VIN_1
5
FB
6
GND
7
PG
8
EN
9
EP[GND]
0 . 1 u F
C8421
LD8400
A2[RD]
C
A1[GN]
330
R8431
1K
OPT
R8450
0 . 1 u F
C8424
ETNHUB_AVDD33
TR0P
GXSPD
GXMODE
ETNHUB_EPHY_RXIN2
0 . 1 u F
C8444
1K
OPT
R8454
ETNHUB_DVDD33
0 . 1 u F
C8423
0 . 1 u F
C8420
ETNHUB_AVDD33
1K
OPT
R8443
ETNHUB_EPHY_TXOP3
0 . 1 u F
C8410
0 . 1 u F
C8427
0 . 1 u F
C8432
0 . 1 u F
C8443
4 9 . 9
1%
1%
R8412
REALTEK_WOL
DISDUALMII
0 . 1 u F
C8414
1K
R8460
OPT
330
R8428
0
R8410
ETNHUB_DVDD33
ETNHUB_AVDD18
470
R8462
OPT
TR1N
0 . 1 u F
C8446
4 9 . 9
1%
1%
R8414
LD8401
A2[RD]
C
A1[GN]
0 . 1 u F
C8442
EPHY_TDP
0 . 1 u F
16V
16V
C8401
LAN_LINK0
10K OPT
R8469
ETNHUB_AVDD18
1K
OPT
R8453
4 9 . 9
R8418
ETNHUB_DVDD18
330
R8429
RSR025P03
Q8400
S
D
G
10K OPT
R8470
ETNHUB_DVDD18
LD8404
A2[RD]
C
A1[GN]
1K
OPT
R8457
LAN_LINK2
0 . 1 u F
C8418
PHY2PRXDV
ETNHUB_DVDD33
10K
OPT
R8468
ETNHUB_DVDD33
LD8405
A2[RD]
C
A1[GN]
470
R8463
OPT
ETNHUB_EPHY_TXOP2
4 9 . 9
R8416
TR1P
1K
OPT
R8447
10K
R8404
ETNHUB_DVDD33
DUP3_GYMODE
ETNHUB_EPHY_TXON3
330
R8433
1K
OPT
R8461
330
R8430
LD8402
A2[RD]
C
A1[GN]
0 . 1 u F
C8447
ETNHUB_AVDD18
GYSPD
10K
OPT
R8405
100K
R8408
0 . 1 u F
C8405
1K
OPT
R8451
LD8403
A2[RD]
C
A1[GN]
BLM18PG121SN1D
L8407
22uF
10V
10V
C8404
22uF
10V
10V
C8416
22uF
10V
10V
C8402
22uF
10V
10V
C8403
RTL8306G
IC8401
1
AVDD18_1
2
RXIN[0]
3
RXIP[0]
4
AGND_1
5
TXOP[0]
6
TXON[0]
7
AVDD18_2
8
AVDD18_3
9
TXON[1]
10
TXOP[1]
11
AGND_2
12
RXIP[1]
13
RXIN[1]
14
AVDD18_4
15
AVDD18_5
16
RXIN[2]
17
RXIP[2]
18
AGND_3
19
TXOP[2]
20
TXON[2]
21
AVDD18_6
22
AVDD18_7
23
TXON[3]
24
TXOP[3]
25
AGND_4
26
RXIP[3]
27
RXIN[3]
28
AVDD18_8
29
AVDD18_9
30
RXIN[4]
31
RXIP[4]
32
AGND_5
33
TXOP[4]
34
TXON[4]
35
AVDD18_10
36
ITEST1
37
ITEST2
38
ITEST3
39 DGND_1
40 RESET#
41 ITEST4
42
DISDUALMII(MODESET4)
43 DVDD18_1
44
P4MODE[1](MODESET3)
45
P4MODE[0](MODESET2)
46P4FLCTRL/CPU_INTERRUPT#
47 P4SPDSTA
48
P4DUPSTA/HOME_CRS
49P4LNKSTA#
50 DGND_2
51
MTXC/PRXC/CTRL_REFCLK1
52M(R)TXEN/PRXDV
53 DVDD18_2
54
M(R)TXD[0]/PRXD[0]/LEDMODE[0]
55
M(R)TXD[1]/PRXD[1]/LEDMODE[1]
56
MTXD[2]/PRXD[2]/P4IRTAG[0]
57
MTXD[3]/PRXD[3]/P4IRTAG[1]
58MCOL/PCOL
59
MRXC/PTXC/REFCLK1
60
MRXDV/PTXEN/CRSDV
61
M(R)RXD[0]/PTXD[0]
62 DVDD33_1
63
M(R)RXD[1]/PTXD[1]
64 DGND_3
65
ITEST5
66
MRXD[2]/PTXD[2]
67
MRXD[3]/PTXD[3]
68
SEL_MIIMAC#/DISDSPRI
69
EN_AUTOXOVER
70
DVDD18_3
71
EN_RST_BLNK
72
ITEST6
73
PHY2PRXD[0]/M(R)2TXD[0]/ENEEPROM
74
SCL_MDC
75
SDA_MDIO
76
PHY2PRXD[1]/M(R)2TXD[1]/GXENFC
77
PHY2PRXD[2]/M2TXD[2]/GYENFC
78
PHY2PRXD[3]/M2TXD[3]/ENBKPRS
79
DGND_4
80
PHY2PRXDV/M(R)2TXEN/DISBRDCTRL
81
PHY2PRXC/M2TXC/CTRL_REFCLK2
82
PHY2PTXC/M2RXC/REFCLK2
83
DISPORTPRI[0]/PHY2PTXEN/M2RXDV/CRSDV2
84
DISPORTPRI[1]/PHY2PTXD[0]/M(R)2RXD[0]
85
DISPORTPRI[2]/PHY2PTXD[1]/M(R)2RXD[1]
86
DISPORTPRI[3]/PHY2PTXD[2]/M2RXD[2]
87
DVDD33_2
88
DISPORTPRI[4]/PHY2PTXD[3]/M2RXD[3]
89
PHY2PCOL/M2COL/LED_BLNK_TIME
90
LOOPLED#/ENDEFER
91
LED_ADD[4]/DISTAGPRI
92
LED_ACT[4]/DISHOMEPLUG
93
LED_SPD[4]/DISVLAN
94
DGND_5
95
LED_DUP[4]/SETGROUP
96
LED_ADD[3]/MODESET1
97
LED_ACT[3]/EN48PASS1
98
LED_SPD[3]/DISARP
99
LED_DUP[3]/MODESET0
100
DVDD18_4
101
LED_ADD[2]/DISLEAKY
102
DGND_6
103
LED_ACT[2]/P4ANEG
104
LED_SPD[2]/GXANEG
105
LED_DUP[2]/GYANEG
106
DVDD33_3
107
LED_ADD[1]/GXSPD100
108
LED_ACT[1]/GYSPD100
109
LED_SPD[1]/GXFULL
110
LED_DUP[1]/GYFULL
111
LED_ADD[0]/ENFORWARD
112
DGND_7
113
LED_ACT[0]/BCINDROP
114
LED_SPD[0]/MAX1536
115
LED_DUP[0]
116
CK25MOUT
117
OSCI
118
HVDD33
119
AVDD18_11
120
X1
121
X2
122
AGND_6
123
VCTRL
124
DTEST2
125
DTEST1
126
AGND_7
127
IBREF
128
AVDD18_12
GYFULL
1K
R8425
LAN_ACT0
0
R8420
GXMODE
1K
R8436
1M
R8415
AUTO_NEGO
25MHz
X8400
1K
R8442
ETNHUB_AVDD18
18pF
50V
C8440
X t a l _ O l d
0
R8421
P4MODE1
18pF
50V
C8441
X t a l _ O l d
0
R8440
Realtek WOL
ETNHUB_AVDD33
270
1%
R8423
EN_AUTOXOVER
LAN_LINK2
P4MODE0
33
R8434
GYSPD
1.69K
1%
R8424
LAN_LINK3
LAN_ACT3
PHY2PRXDV
ETNHUB_DVDD18
DUP3_GYMODE
ETNHUB_DVDD33
PHY2PTXEN
1K
R8426
OPT
0
R8422
GXFULL
GXSPD
PHY2PRXD3
DISDUALMII
LAN_ACT2
LAN_LINK0
SETGROUP
33
R8435
ETNHUB_DVDD33
ETHERNET_MDIO
ETNHUB_DVDD33
ETHERNET_MDC
0
R8427
Realtek WOL
REALTEK_WOL
1K
R8449
ETNHUB_DVDD33
1K
Realtek WOL
R8439
HUB_STATE
ETHERNET_RESET
ETHERNET_MDIO
ETHERNET_MDC
ETNHUB_EPHY_TXOP3
ETNHUB_EPHY_TXON3
ETNHUB_EPHY_RXIP3
ETNHUB_EPHY_RXIN3
ETNHUB_EPHY_RXIP0
ETNHUB_EPHY_RXIN0
ETNHUB_EPHY_TXOP0
ETNHUB_EPHY_TXON0
REALTEK_WOL
MAGIC_WOL
LAN_LINK0
LAN_ACT0
22uF
10V
10V
C8438
22uF
10V
10V
C8439
22uF
10V
10V
C8425
22uF
10V
10V
C8428
330
R8476
330
R8477
LD8406
A2[RD]
C
A1[GN]
LD8407
A2[RD]
C
A1[GN]
LAN_ACT2
LAN_LINK2
4.7K
OPT
R8441
0
R8472
0
R8473
ETNHUB_EPHY_RXIN2
0
R8474
ETNHUB_EPHY_RXIP2
ETNHUB_EPHY_TXOP2
0
R8475
ETNHUB_EPHY_TXON2
1.5K
R8458
1.5K
R8465
ETNHUB_EPHY_RXIN1
ETNHUB_EPHY_TXON1
ETNHUB_EPHY_RXIP1
ETNHUB_EPHY_TXOP1
ETHERNET_PWR_ON/OFF
+3.5V_ST
10K
R8487
10K
R8486
27pF
50V
C8441-*1
X t a l _ m a t c h i n g
27pF
50V
C8440-*1
X t a l _ m a t c h i n g
1K
R8456
ETNHUB_DVDD33
1K
R8488
OPT
PHY2PTXEN
1K
R8455
OPT
SETGROUP
ETNHUB_DVDD33
1K
OPT
R8490
1K OPT
R8489
CB2012PK501T
L8400
UBW2012-121F
L8404
UBW2012-121F
L8408
PHY TO RTL matching
$ 0 . 1 3
P l a c e c l o s e t o c h i p
V o u t = 1 . 5 * ( 1 + R 1 / R 2 )
MTK TO RTL matching
R1
CONFIG FOR MAC4
R2
Vout
P H Y 2 P R X D V : B r o a d c a s t s t r o m c o n t r o l e n a b l e / d i s a b l e
P H Y 2 P R X D 3 : B a c k p r e s s u r e e n a b l e / d i s a b l e
ENDEFER(NOT USED) : Defer enable/disable
EN_AUTOXOVER : Auto cross over enable/disable
P l a c e c l o s e t o c h i p
STRAPPING PIN CONFIG
RTL
SOC
P l a c e t o c e n t e r p o s i t i o n b e t w e e n t w o c h i p s
FOR DEBUG
WOL
P l a c e t o c e n t e r p o s i t i o n b e t w e e n t w o c h i p s
D i f f e r e n t i a l 1 0 0 o h m
N o V i a
C l o s e t o
P l a c e C l o s e T o R T L 8 3 0 6
P l a c e C l o s e T o R T L 8 3 0 6
M i d e : 1 1 1 1 1
2 0 1 1 . 0 2 . 0 9
xxLT760H-UA
84
E t h e r n e t H u b
S O C
TO PHY Chip
To PHY
LAN1
LAN2
R8426(NC) : Disable HOMEPLUG
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