LG 42LV375H Service Manual page 31

+3.5V_ST
D3.3_ETHUB
Q1300
L1303
RSR025P03 R1304
BLM18PG121SN1D
0
C1312 C1311
C1313 OPT 0 . 1 u F 22uF
0 . 1 u F R1360 R1361 16V
16V
16V 10K 10K
C
Q1301 B
ETHUB_PWR_ON/OFF
2SC3052
E
A3.3_ETHUB
IC1302
MP20045DQ-LF-Z
EP[GND]
R1362
VIN_1 EN 10K
1 8
C1348
R1363
2 . 2 u F
VIN_2 PG
100K
25V 2 7
VOUT_1 GND
3 6
$ 0 . 1 3
R1364
L1301
VOUT_2 FB 10K
4 5
BLM18PG121SN1D
Vout
R2
R1365
R1 C1349
2K
2 . 2 u F
V o u t = 1 . 5 * ( 1 + R 1 / R 2 )
25V
A3.3_ETHUB
D3.3_ETHUB
C1345 C1346
C1341 C1342 C1343 C1344
22uF 0 . 1 u F
22uF 0 . 1 u F 0 . 1 u F 0 . 1 u F
16V 16V
A1.8_ETHUB
C1316 C1319 C1321 C1322 C1323 C1324 C1327
22uF 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 . 1 u F
0 . 1 u F
16V
A2.5V
D1.8_ETHUB
L1304
C1336 C1337 C1339 BLM18PG121SN1D
C1338 C1340
22uF 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 . 1 u F
16V
C1320
0 . 1 u F
16V
BCM TO RTL matching
A1.8_ETHUB
D2.5V_ETHUB
CIS21J121
CIS21J121
L1305
L1306
EPHY_RDP
C1328
R1308
4 9 . 9 0 . 1 u F R1318
4 9 . 9
1%
1%
C1325 C1333 R1319
R1309 0 . 1 u F 4 9 . 9
0 . 1 u F
4 9 . 9 1%
1%
EPHY_RDN
C1329
0 . 1 u F
EPHY_TDP
C1330
R1310 R1320
0 . 1 u F
4 9 . 9
4 9 . 9
1%
1%
C1326
0 . 1 u F C1334
R1311 R1321
0 . 1 u F
4 9 . 9 4 9 . 9
1% 1%
EPHY_TDN
C1331
0 . 1 u F
P l a c e c l o s e t o c h i p
P l a c e c l o s e t o c h i p
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
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 © 2011 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
A3.3_ETHUB
C1308
22uF
16V
A3.3_ETHUB
LAN_ACT2
LAN_LINK2
D1.8_ETHUB
AUTO_NEGO
A1.8_ETHUB
GXSPD
GYSPD
L1300
BLM18PG121SN1D GXFULL
GYFULL
C1304 C1303 C1300
0 . 1 u F 22uF 22uF
16V
16V 16V LAN_ACT0
LAN_LINK0
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
A1.8_ETHUB
C1332 C1335
0 . 1 u F 0 . 1 u F
D2.5V_ETHUB
OPT
C1315 C1314
0 . 1 u F 22uF
16V
16V
EPHY_TXOP3
EPHY_TXON3
EPHY_RXIP3
EPHY_RXIN3
D3.3_ETHUB
LED_ACT[2]/P4ANEG
103
LED_SPD[2]/GXANEG
104
LED_DUP[2]/GYANEG
105
DVDD33_3
106
LED_ADD[1]/GXSPD100
107
LED_ACT[1]/GYSPD100
108
LED_SPD[1]/GXFULL
109
LED_DUP[1]/GYFULL
110
LED_ADD[0]/ENFORWARD
111
DGND_7
112
LED_ACT[0]/BCINDROP IC1300
113
LED_SPD[0]/MAX1536
114
LED_DUP[0]
115
RTL8306G
CK25MOUT
116
R1317 OSCI
117
1K
HVDD33
118
AVDD18_11
119
X1
120
X2
121
AGND_6
122
R1312 0 VCTRL
123
R1313
0 DTEST2
124
R1314 0 DTEST1
125
AGND_7
126
IBREF
127
AVDD18_12
128
FOR DEBUG
D3.3_ETHUB
RTL LD1300 LD1303
OPT OPT
R1324 R1326
330 330
OPT OPT
LAN_LINK3
LAN_ACT3
EPHY_LINK
EPHY_ACTIVITY
R1325 R1327
330 330
OPT OPT
BCM
LD1301 LD1302
OPT
OPT
D1.8_ETHUB
64 DGND_3
M(R)RXD[1]/PTXD[1]
63
62 DVDD33_1
M(R)RXD[0]/PTXD[0]
61
MRXDV/PTXEN/CRSDV
60
59 MRXC/PTXC/REFCLK1
58 MCOL/PCOL
MTXD[3]/PRXD[3]/P4IRTAG[1]
57
MTXD[2]/PRXD[2]/P4IRTAG[0]
56
55 M(R)TXD[1]/PRXD[1]/LEDMODE[1]
54 M(R)TXD[0]/PRXD[0]/LEDMODE[0]
53 DVDD18_2
52 M(R)TXEN/PRXDV
51 MTXC/PRXC/CTRL_REFCLK1
50 DGND_2
49 P4LNKSTA#
48 P4DUPSTA/HOME_CRS
47 P4SPDSTA
R1328 0
46 P4FLCTRL/CPU_INTERRUPT#
P4MODE[0](MODESET2)
45 P4MODE0
P4MODE[1](MODESET3)
44 P4MODE1
43 DVDD18_1
DISDUALMII(MODESET4)
42 DISDUALMII
41 ITEST4
40 RESET# ETHUB_RESET
39 DGND_1
D i f f e r e n t i a l 1 0 0 o h m
No Via
C l o s e t o
Chameleon(EU_GP2_BCM3556)
xxLV375H-ZA
ETHERNET HUB
STRAPPING PIN CONFIG
D3.3_ETHUB
AUTO_NEGO
PHY2PRXDV
PHY2PRXD3
ENDEFER
EN_AUTOXOVER
LAN_ACT0
GXSPD
R1353 0
GYSPD LAN_ACT1
R1354
0
GXFULL LAN_LINK1
GYFULL
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
PHY2PRXD3 : Backpressure enable/disable
ENDEFER : Defer enable/disable
EN_AUTOXOVER : Auto cross over enable/disable
R1330 1K
SETGROUP
R1331 1K
PHY2PTXEN
CONFIG FOR MAC5
R1335
470
DISDUALMII
R1332
470
OPT
P4MODE1
R1336
470
P4MODE0
R1333
1K
GXMODE
R1334
1K
OPT
DUP3_GYMODE
R1340
10K OPT
LAN_LINK2
R1339
10K OPT
LAN_ACT2
R1338
10K OPT
LAN_ACT3
R1337
10K OPT
LAN_LINK0
D3.3_ETHUB
R1329 R1357
1K 1K
ETHUB_MDC
ETHUB_MDIO
R1358 R1359
1K 1K
OPT OPT
2 0 1 0 . 1 2 . 2 0
13
LGE Internal Use Only