LG 40LX770H Service Manual page 50

b-LAN
close to b-LAN
TU8900
TMMB-H701F
+3.3V
1
SIF
2
GND_1
3
SDA
4
CVBS
5
IF-N1
6
+1.8V
7
IF-P2
8
RESET
R8950
9
AGC1
10
GND_2
11
SCL
12
GND_3
13
IF-P1
14
GND_4
15
IF-N2
16
AGC2
17
RESET2
18
NC
19
GND_5
20
+5V
21
JP2-P1
22
JP2-P4
23
J1-P2
24
J1-P3
25
J1-P4
26
J1-P5
27
PTS
28
JP1-P3
29
JP1-P4
30
JP1-P5
31
JP1-P6
32
JP1-P7
33
JP1-P10
34
J2-P1
35
J2-P2
36
J2-P3
37
J2-P4
38
J2-P6
39
40
SHIELD
465mA(MAX)
+3.3V_NORMAL
+3.3V_TU
Vout=1.25*(1+R2/R1)+Iadj*R2
+3.3V_TU
L8904
BLM18PG121SN1D
IC8900
AZ1117EH-ADJTRG1
C8931
C8930
C8932
22uF
0.1uF
0.1uF
16V 10V 16V
IN OUT
ADJ/GND
C8929
10uF
Close to the b-LAN
10V
1.3A
150mA(MAX)
+5V_NORMAL
+5V_TU
L8906
BLM18PG121SN1D
C8933 C8934
C8935 C8936
0.1uF 22uF
22uF 0.1uF
16V 10V
10V 16V
Close to the b-LAN
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright 2015 LG Electronics Inc. All rights reserved.
Only for training and service purposes
OPT
+5V_TU
C8906
22uF
R8943 6.3V
470 R8944
82
TUNER_SIF
E +5V_TU
C8921
B
Q8906
0.1uF 16V
C
R8945 MMBT3906(NXP) R8946
220
4.7K
E
L8903
BLM18PG121SN1D
+1.8V_TU B Q8907
C8922
C8923 C8924
100pF MMBT3906(NXP)
0.1uF 0.1uF C
50V R8948
16V 16V
1K
OPT
close to b-LAN
R8911 22
R8912
22
C8900
C8903
27pF 27pF
MAIN_NDIF 50V
50V
+3.3V_TU
OPT
R8949
100K Add 2page Pull up
100
/TU_RESET
C8926
0.1uF
1. should be guarded by ground
SUB_PDIF 2. No via on both of them
3. Signal Width >= 12mils
Signal to Signal Width = 12mils
SUB_NDIF
Ground Width >= 24mils
SUB_IF_AGC
MAIN_PDIF
R8951 100
C8941
MAIN_IF_AGC
1000pF
C8927
SUB_IF_AGC 50V
0.1uF close to b-LAN
16V
R8907 22
b_PTS_CTL
R8908 22
MPI_DIN
R8909
22
MPI_DOUT
R8904 22
SPI_DOUT
R8910 22
SPI_DIN
R8905 22
SPI_CLOCK
22
R8906
bLAN_IR
R8913
L8900
C8904
2200pF
50V
R8902 22
R8903 22
Max 240mA
+3.5V_ST +3.3V_TU_IN
C8942
+1.8V_TU L8905
0.1uF
BLM18PG121SN1D
16V
L8907
MLB-201209-0120P-N2
150
R8963 ZD8900
R1
R8960 0 2.5V
300 IC8901
C8928
R8961
AP2132MP-2.5TRG1
10uF [EP]
+3.3V_TU_IN
10V
200 R2
1 8
R8962
C8938
GND
PG
0.1uF
2 7
ADJ
EN
R8954
10K
3 6
C8937 VOUT
VIN
+5V_NORMAL 2A
10uF
4 5
16V
NC
VCTRL
C8939
1uF
Vout=0.6*(1+R1/R2)
+3.3V_TU
L8901
BLM18PG121SN1D
OPT
C8925 C8908 C8909
100pF 0.1uF 10uF
6.3V
50V 16V
2012 perallel
R8947
220
because of derating
TU_CVBS
I2C_SCL6
I2C_SDA6
OPT OPT
C8911 C8912 C8913
22uF 0.1uF 10uF
16V 16V 10V
3305_IF_AGC
R8970 R8917
C8910
100
1K
0.01uF
22 R8918
22 R8919
22 R8920
22 R8921
22 R8922
R8923
22
+5V_bLAN_EXT
R8914 22
22
B-Land External RJ12 jack
JK8900
MJ-623PT-6-S-SD
1
2
3
4
5
6
Max 0.7A
+1.23V_TU
R8955
20K R2
1%
R8956
11K
1%
R1
R8957
10K
1%
C8940
10uF
16V
b-LAN POWER
+5V_bLAN +5V_TU
+5V_bLAN_PWR bLAN_POWER_MANAGE
JK8901
PEJ027-04
E_SPRING
3
T_TERMINAL1
6A
B_TERMINAL1
7A
R_SPRING
4 bLAN_POWER_MANAGE
T_SPRING
5
B_TERMINAL2
7B
T_TERMINAL2
6B
B-Lan MPI pin3 output power(12V) control
MPI_DOUT
MPI_DIN
MPI_SENSE
Game_control
GND
IR_OUT
7
+5V_ST +5V_ST_bLAN
L8902
CB3216PA501E
+5V_ST_bLAN
BLAN CHECK
+5V_bLAN
FET_OLD
Q8904
AO3407A
5VST_JIG
BLAN CHECK C8914 R8940
R8936 C8917
C8919
0.1uF
2.2K
47K G 10V 1uF
16V
1uF OPT 10V
OPT
R8932
OPT
R8928
10K
Q8903 FET_NEW FET_NEW
C
2SC3052 Q8904-*1 Q8905-*1
AO3407B AO3407B
B
R8926
R8933
47K
100K
E
OPT
G G
+13V_C +13V_C_MPI
FET_OLD
Q8905
AO3407A
C8915
R8935 R8939
0.1uF
5VST_JIG G C8918
47K C8916 2.2K
16V 1uF
22uF
BLAN CHECK OPT
25V
OPT
Q8902 C
R8924
47K
B +13V_C
+13V
2SC3052
D8911
E
SX34
40V
+13V_C_MPI
12V_JIG
BLAN CHECK
JP8920
E
2N3906S-RTK
B Q8901
C
+5V_bLAN_EXT
C MPI_5V or 12V
Q8900 B
2SC3052
E
R8938
3.3K
b_PTS_CTL
MPI_5V or 12V (PIN3) Select Control from b-LAN
LX770H
2014.11.15
22 24
bLAN
LGE Internal Use Only