Read LG 26LT670H (CHASSIS:LA2AE) 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.
22uF
OPT
C3030
+12V_C_MPI
RJ12_MPI_DOUT
022:AH11
5
.6
V
O
PT
D
30
10
RJ12_IR_MPI_MODEM_buffer
0.1uF
16V
C3011
IF_P_MSTAR
bLAN_POWER_MANAGE
020:AG4;022:P17
0
B-LAN
R3006
1K
TU_IIC_NON_ATSC_SANYO
R3035-*1
+5V_ST_bLAN
1.2K
TU_IIC_ATSC_SANYO
R3037
0
B-LAN
R3013
0.1uF 16V
C3003
5
.6
V
O
PT
D
30
03
470
RJ12_MPI
R3059
220
RJ12_MPI
R3053
0
B-LAN
R3011
0
RJ12_MPI
R3016
RJ12_IR_MPI_MODEM_buffer
3.3K
R3040
220pF
RJ12_MPI
C3031
10
K
R
J1
2_
M
P
I
R3
02
4
33
TU_I2C_NON_FILTER
R3034
22
K
O
PT
R
30
66
GND
20pF
50V
TU_I2C_FILTER
C3023
GND
+12V_C
1W
2
0
0
B
-L
A
N
R
30
41
1
M
R
J1
2_
M
P
I
R3056
0.1uF
16V
C3016
BEXT_IR_MODEM
020:R5
100
R3025
BEXT_MPI_OUT
020:R8
BEXT_MPI_DIN
020:N15
0
B-LAN
R3019
22uF
16V
OPT
C3015
1K
TU_IIC_NON_ATSC_SANYO
R3037-*1
22
K
R
J1
2_
M
P
I
R3
05
0
MLB-201209-0120P-N2
B-LAN
L3002
0.1uF
16V
B-LAN
C3029
+5V_BLAN
0
R3001
20pF
50V
TU_I2C_FILTER
C3019-*1
0
B-LAN
R3012
0.1uF
16V
C3013
BEXT_MPI_DIN
020:R7
BEXT_Game_Control_Latch
020:R6
SPI_CLOCK
022:AM23
0
RJ12_MPI
R3018
100K
OPT
R3068
0
R3002
5
.6
V
O
PT
D
30
08
SPI_DIN
022:AM22
YFDW254-06S
OPT
P3000
4
3
2
6
1
5
RJ12_MPI_DOUT_buffer
10K
RJ12_MPI
R3054
0.1uF
16V
B-LAN
C3028
0
B-LAN
R3008
+5V_ST_bLAN
bLAN_POWER_MANAGE
020:AG8;022:P17
+5V_ST
+3.3V_TU
BEXT_5V
470
RJ12_MPI
R3044
SPI_DOUT
022:AM22
RJ12_MPI_DIN_buffer
100pF
50V
C3010
AO3407AB-LAN
Q3010
G
D
S
0
B-LAN
R3029
MPI_DIN
022:AI19
+12V_C_MPI
1/10W
3.3K
5%
B-LAN
R3042
BEXT_IR_MODEM
020:N14
RJ12_MPI_DIN_buffer
10
K
R
J1
2_
M
P
I
R3
04
7
0
B-LAN
R3027
COIL
TU_I2C_FILTER
R3033-*1
33
TU_I2C_NON_FILTER
R3033
0
RJ12_MPI
R3015
+5V_ST
0
B-LAN
R3022
10uF
10V
OPT
C3018
1/
10
W
10
K
5%
B
-L
A
N
R
30
38
BEXT_MPI_OUT
020:N15
1.2K
TU_IIC_ATSC_SANYO
R3035
IF_N_MSTAR
TUNER_RESET
20pF
50V
TU_I2C_FILTER
C3022
470K
RJ12_MPI
R3051
b_com_PWCTRL
020:AB5
0
B-LAN
R3020
18pF
50V
TU_I2C_NON_FILTER
C3019
0.1uF
16V
OPT
C3024
0
B-LAN
R3021
18pF
50V
TU_I2C_NON_FILTER
C3021
TU_SDA
5
.6
V
O
PT
D
30
05
5
.6
V
O
PT
D
30
04
3.3K
RJ12_MPI
R3069
5
.6
V
O
PT
D
30
07
JP3016
220pF
RJ12_MPI
C3026
MPI_DOUT
022:AM18
1K
R3036
0.1uF
16V
C3020
IF_AGC_MAIN
MLB-201209-0120P-N2
B-LAN
L3003
0
B-LAN
R3010
RJ12_IR_MPI_MODEM
022:AN14
20pF
50V
TU_I2C_FILTER
C3021-*1
+5V_ST
0
B-LAN
R3014
5
.6
V
O
PT
D
30
02
0
R3003
+5V_BLAN_TU
TU_SCL
1uF
10V
OPT
C3032
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.
BEXT_5V
1K
R
J1
2_
M
P
I
R3
05
7
4.
7K
R3
04
5
bLAN_IR_IN_MODEM
022:AN12
+3.3V_Normal
220
RJ12_MPI
R3072
47K
B
-L
A
N R3070
5
.6
V
O
PT
D
30
09
0
R3000
22uF
10V
C3012
+3.3V_TU
GND
BEXT_Game_Control_Latch
020:N14
1W
2
0
0
B
-L
A
N
R
30
39
220pF
RJ12_MPI
C3027
0.1uF
16V
C3009
+3.3V_TU
+5V_ST
COIL
TU_I2C_FILTER
R3034-*1
BEXT_5V
1uF
10V
B
-L
A
N
C3034
RJ12_MPI_DIN
022:AI8
0
RJ12_MPI
R3017
0.1uF
16V
B-LAN
C3017
30
V
O
PT
D
30
06
+3.3V_TU
22uF
10V
C3007
b_com_PWCTRL
020:M18
RJ12_MPI_DOUT_buffer
0
B-LAN
R3023
0
B-LAN
R3009
4.7K
RJ12_MPI
R3043
0
B-LAN
R3028
AO3407AB-LAN
Q3011
G
D
S
100pF
50V
C3014
+1.2V/+1.8V_TU
MLB-201209-0120P-N2
L3001
100K
R3026
1/10W
1
R3005
0.1uF
16V
C3000
0
R3004
150
OPT
R3007
+1.2V/+1.8V_TU
10uF
10V
C3008
+3.3V_TU
0.1uF
16V
C3006
22
K
R
J1
2_
M
P
I
R3
06
3
47K
B
-L
A
N
R3071
47K
B-LAN
R3058
47K
B-LAN
R3061
47
K
O
PT
R
30
65
10
K
B
-L
A
N
R
30
62
10KB-LAN
R3064
2.2K
OPT
R3073
2.2K
OPT
R3074
10K
OPT
R3067
PEJ027-01
BLAN_Sn
JK3001
6B
T_TERMINAL2
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
PEJ027-04
BLAN_Au
JK3001-*1
6B
T_TERMINAL2
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
0
BLAN
R3031
0
BLAN
R3032
0
BLAN
R3030
MJ-623PT-6-S-SD
BLAN
JK3000
1
2
3
4
5
6
7
MJ-623PT-6-S-SD
RJ12_MPI
JK3000-*1
1
2
3
4
5
6
7
AZ1117BH-1.8TRE1
IC3000
1
ADJ/GND
2 OUT
3
IN
KCN-BT-0-0056
JK3002
1
2
3
4
MLB-201209-0120P-N2
L3000
+5V_BLAN
+5V_BLAN_TU
0.1uF
16V
C3005
0.1uF
16V
C3002
22uF
16V
C3004
22uF
10V
C3001
220
TU_BUFFER
R3060
+3.3V_TU
0
TU_BUFFER
R3048
220
TU_BUFFER
R3052
1K
OPT
R3049
470
TU_BUFFER
R3076
+3.3V_TU
TU_CVBS
82
R3077
0
TU_NON_BUFFER
R3055
0
TU_NON_BUFFER
R3046
TU_SIF
4.7K
TU_BUFFER
R3075
MMBT3904(NXP)
B-LAN
Q3008
E
B
C
MMBT3904(NXP)
B-LAN
Q3009
E
B
C
MMBT3906(NXP)
TU_BUFFER
Q3003
E
B
C
MMBT3906(NXP)
Q3005
E
B
C
1uF
25V
B
-L
A
N
C3033
MMBT3906(NXP)
RJ12_MPI
Q3006
E
B
C
MMBT3904(NXP)
B-LAN
Q3000
E
B
C
RJ12_MPI
Q3002
E
B
C
RJ12_MPI
Q3004
E
B
C
MMBT3904(NXP)
RJ12_MPI
Q3007
E
B
C
MMBT3906(NXP)
B-LAN
Q3001
E
B
C
220pF
50V
B-LAN
C3025
TMMB-H002F
TU3001
1
SIF
2
+3.3V
3
SCL
4
SDA
5
IF_AGC
6
GND_1
7
CVBS
8
RESET
9
+1.8V
10
DIF_N
11
DIF_P
12
GND_2
13
+5V
14
JP2_P1
15
JP2_P4
16
J1_P2
17
J1_P3
18
J1_P4
19
J1_P5
20
PTS
21
JP1_P3
22
JP1_P4
23
JP1_P5
24
JP1_P6
25
JP1_P7
26
JP1_P10
27
J2_P1
28
J2_P2
29
J2_P3
30
J2_P4
31
J2_P6
32
SHIELD
20
S i z e c h a n g e
b_LAN Game control JACK
60mA
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
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
NC
BLAN CHECK
RxD -->L
C l o s e t o t h e t u n e r
s h o u l d b e g u a r d e d b y g r o u n d
BLAN CHECK
MPI_DOUT
IR_OUT
MPI_5V or 12V
Tuner & b-LAN power
B-LAN & tuner
GND
12V_JIG
POWER LINE
M P I b u f f e r
TxD--> R
close to TUNER
close to TUNER
5V
b_LAN MPI pin3
BLAN CHECK
B-LAN POWER
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 fr o m b - L A N
MPI_DIN
T u n e r R F j a c k
p o w e r c o n t r o l
BLAN CHECK
B - l a n & T u n e r
Add,0929
5VST_JIG
5VST_JIG
add,0929
C a n t u n e r r e a d y
37LT670H-UA
LA1EY
20111008
l o c a t i o n m o v e m e n t , 0 9 2 9
S i z e c h a n g e
200mA
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