LG 42CQ610H Service Manual page 33

B-LAN & tuner
C a n t u n e r r e a d y
NEW_BLAN
TU1003
TMMB-H002F
SIF C5025
1
+3.3V 0 . 1 u F 16V
TU3700 2
TDSS-H101F
SCL close to TUNER
3
NC SDA
1
4
RESET
2
IF_AGC R5003
SCL 5
3
SDA GND_1 0
4
6
+B1[3.3V]
5
CVBS
SIF 7
6
RESET
+B2[1.8V]
7 8
CVBS
8 +1.8V
9
IF_AGC
9
DIF_N 0
D I F [ P ] R5034
10
10
DIF[N] 0
DIF_P R5035
11
11
12 GND_2
12
close to TUNER
SHIELD +5V
13
GND JP2_P1
14
JP2_P4
15
J1_P2
16
J1_P3
17
J1_P4
18
J1_P5
19
PTS
20
JP1_P3
21
JP1_P4
22
JP1_P5
23
JP1_P6
24
JP1_P7
25
JP1_P10
26
J2_P1
27
J2_P2
28
J2_P3
29
J2_P4
30
J2_P6
31
32
SHIELD
GND
Tuner & b-LAN power
+1.2V/+1.8V_TU
IC3703
+3.3V_TU
AZ1117BH-1.8TRE1
IN OUT
3 2
1
R3766 R3703
ADJ/GND 1
150
1/10W
OPT
C3741
10uF
10V
a d d , 0 9 2 9
+3.3V_Normal
+3.3V_TU
S i z e c h a n g e
L3703
MLB-201209-0120P-N2
60mA
C3715
C3727
C3723 C3725
22uF
0 . 1 u F
0 . 1 u F
22uF 10V
16V
10V 16V
Add,0929
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright ⓒ 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
+1.2V/+1.8V_TU
+3.3V_TU
C1787 C1788
100pF 0 . 1 u F
50V
16V C5006
C5007
100pF
0 . 1 u F
50V
16V
P1400
YFDW254-06S
B-LAN
R2529 0
1 2
B-LAN
R2530
OPT 0
3 4
L3702
MLB-201209-0120P-N2
5 6
C3724 C3719
0 . 1 u F 22uF
16V
10V
B-LAN
011:AB5
R2519 0
B-LAN
b_com_PWCTRL
R1439
0 0 1 6 : A I 1 9
B-LAN
MPI_DIN
R1440
0
016:AM18
MPI_DOUT
B-LAN
GND
R1441 0
B-LAN
SPI_DOUT
016:AM22
R1443 0
SPI_DIN
016:AM22
R1442 B-LAN 0
SPI_CLOCK 016:AM23
016:AN12
R1400 B-LAN 0
bLAN_IR_IN_MODEM
B-LAN
R1410 0
B-LAN
BEXT_MPI_OUT 011:R8
R1407 0
BEXT_MPI_DIN 011:R7
B-LAN
L1401 MLB-201209-0120P-N2
R1406 B-LAN
0
BEXT_Game_Control_Latch
R1401 B-LAN
0
BEXT_IR_MODEM
011:R5
RJ12_MPI
R613 0
RJ12_MPI_DOUT_buffer
RJ12_MPI
R616 0
RJ12_MPI_DIN_buffer
RJ12_MPI
R614 0
RJ12_MPI
R615 0
RJ12_IR_MPI_MODEM_buffer
b_LAN Game control JACK
JK1401
MJ-623PT-6-S-SD
MPI_DOUT 1
MPI_DIN
2
5V
3
4
NC
GND
5
6
IR_OUT
7
C3711-*1 C3713-*1
20pF 20pF
50V 50V TU_IIC_NON_ATSC_SANYO TU_IIC_NON_ATSC_SANYO
TU_I2C_FILTER TU_I2C_FILTER
+3.3V_TU
R3740-*1
TU_I2C_FILTER 1K R3741-*1
TU_I2C_FILTER
1K
R3735-*1 R3736-*1
TU_IIC_ATSC_SANYO
TU_IIC_ATSC_SANYO
COIL COIL R3740
1.2K R3741
33 R3735
1.2K
TU_I2C_NON_FILTER
TU_I2C_NON_FILTER
C3713
33 R3736
C3743
18pF TU_I2C_NON_FILTER
20pF
50V
TU_I2C_NON_FILTER C3742
50V
C3711
20pF
TU_I2C_FILTER
18pF
50V
50V
TU_I2C_FILTER
R5022
1K
+3.3V_TU
C5016
0 . 1 u F
16V
R5009 R5011
OPT
100K
100
TUNER_RESET
C5010
0 . 1 u F
C l o s e t o t h e t u n e r
16V
IF_N_MSTAR
IF_P_MSTAR
1 . s h o u l d b e g u a r d e d b y g r o u n d
2 . N o v i a o n b o t h o f t h e m
+5V_BLAN 3 . S i g n a l W i d t h > = 1 2 m i l s
S i g n a l t o S i g n a l W i d t h = 1 2 m i l s
G r o u n d W i d t h > = 2 4 m i l s
C3722
C3726
22uF 0 . 1 u F
16V 16V JK6001
PEJ027-04
E_SPRING
BLAN BLAN 3
C l o s e t o t h e t u n e r
R1418
0 T_TERMINAL1
BLAN 6A
R1414
0 B_TERMINAL1
BLAN 7A
R1413
0 R_SPRING
BLAN 4
R1415
0 T_SPRING
5
BLAN
R1416
0 B_TERMINAL2
7B
BLAN
R1417
0 T_TERMINAL2
6B
GND
BEXT_5V
011:R6
+5V_ST
b_LAN MPI pin3
p o w e r c o n t r o l
+12V_C_MPI
POWER LINE
BEXT_5V
011:N15
BEXT_MPI_OUT
3.3K
BEXT_MPI_DIN
R1472
011:N15
011:N14
BEXT_Game_Control_Latch
BEXT_IR_MODEM
C
011:N14
Q1470 B-LAN B
2SC3875S(ALY)
E
+3.3V_TU
TU_SCL
TU_BUFFER
R5008
470
TU_SDA
TU_NON_BUFFER
R5005
0
E
TU_BUFFER B
R5007
+3.3V_TU C
4.7K
IF_AGC_MAIN
TU_BUFFER
TU_BUFFER
s h o u l d b e g u a r d e d b y g r o u n d R5004 R5006
220 220
TU_NON_BUFFER
R5000
0
E
R5001
0
TU_BUFFER
B Q5000
TU_BUFFER
MMBT3906(NXP)
C
OPT
+5V_ST
RJ12_MPI
R602
470
RJ12_MPI_DIN
RJ12_MPI
C
0 1 6 : A I 8
10K R610
B
RJ12_MPI
Q601
E
RJ12_MPI
R611
RJ12_MPI 220
R601
C
4.7K
B
RJ12_MPI
RJ12_MPI_DOUT +5V_ST
016:AH11 Q600
E
RJ12_MPI
R600
470K
016:AN14
RJ12_IR_MPI_MODEM
B-LAN POWER
12V_JIG
BLAN CHECK
JP1483
bLAN_POWER_MANAGE
016:N17;011:AG4
E
B-LAN
2N3906S-RTK
B Q1471
C
BEXT_5V
B-LAN
C1470
220pF
50V MPI_5V or 12V
B-LAN
R1474
3.3K
b_com_PWCTRL
1/10W
011:M18
5%
bLAN_POWER_MANAGE
016:N17;011:AF8
M P I _ 5 V o r 1 2 V ( P I N 3 ) S e l e c t C o n t r o l f r o m b - L A N
R5010
82
TU_SIF
MMBT3906(NXP)
Q5001
TU_CVBS
M P I b u f f e r
RJ12_MPI
C601
220pF
RJ12_MPI_DIN_buffer
RJ12_MPI
C600
RJ12_MPI_DOUT_buffer
220pF
RJ12_IR_MPI_MODEM_buffer
RJ12_MPI
RJ12_MPI
R607
R612
470 3.3K
RJ12_MPI
E
2SA1504S
B
RJ12_MPI
Q602
C
220 R617 RJ12_MPI
C602
C
B
220pF
2SC3875S(ALY)
RJ12_MPI
Q603
E
+5V_ST +5V_ST_bLAN
B-LAN
L1405
+5V_ST_bLAN
MLB-201209-0120P-N2
BLAN CHECK
+5V_BLAN
Q1807
AO3407A B-LAN
5VST_JIG B-LAN
BLAN CHECK R1801
R1893 C1801
2.2K
47K G 10V
1uF OPT
OPT
R1891
10K
OPT
R1877
B-LAN
10K
Q1808
C
2SC3052
B
B-LAN B-LAN
R1892 R1890
47K
100K
E
OPT
+12V_C +12V_C_MPI
Q1804
AO3407A B-LAN
B-LAN
C1833
R1880 R1802
0 . 1 u F
5VST_JIG G
47K C1804 2.2K
16V 22uF
BLAN CHECK OPT
OPT
B-LAN
Q1803 C
R1879
47K B
B-LAN
2SC3052
E
42LD6DDH-UA 2 0 1 1 . 1 2 . 0 1
B - l a n & T u n e r 11 11
LGE Internal Use Only
C1802
1uF
10V
C1805
1uF
16V