LG 42LE5350, Service Manual

Page: 27 / 84

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.
09/10/xx
ATSC_TUNER
7 100
GP2_BCM_ATSC
C720
47pF
50V
R728
4.7K
+5V_TU
R722
3.3K
TU_CVBS
11:C4
+3.3V_TU
M_IF_N
11:D2
C704
22uF
16V
R704
100K
OPT
C719
0.1uF
16V
OPT
IF_AGC_CHB
15:A2
IF_P_CHB
15:A3
C716
0.1uF
16V
CVBS_CHB
15:B5;AI7
C708
0.1uF
16V
C703
100pF
50V
R723
3.3K
C707
0.1uF
16V
C702
22uF
16V
OPT
+5V_TU
SCL0_3.3V
SCL0_3.3V
TU_SIF
11:C5
TUNER_SUB_RESET
9:G5
SDA0_3.3V
+5V_TU
SDA0_3.3V
+3.3V_NORMAL
R705
CHB
100
Q701
ISA1530AC1
E
B
C
R711
100K
OPT
C713
0.1uF
16V
CHB
C715
0.1uF
16V
OPT
R730
1K
OPT
R708
0
R716
0
CHB
M_IF_AGC
11:D1
R713
3.3K
CHB
+3.3V_TU
R719
100
R715
0
CHB
+3.3V_TU
C714
47pF
50V
CHB
C712
0.1uF
16V
R726
1K
OPT
R727
1K
OPT
+32V_TU
R725
0
+3.3V_TU
R720 100
Q702
ISA1530AC1
E
B
C
C709
0.1uF
16V
R706
CHB
100
TUNER_MAIN_RESET
9:G4
R703
100
CHB
+5V_TU
M_IF_P
11:D2
Q700
ISA1530AC1
CHB
E
B
C
+3.3V_TU
R724
0
CHB
+1.26V_TU
L701
BLM18PG121SN1D
C710
47pF
50V
CHB
R729
1K
OPT
C711
0.1uF
16V
R707
100
C700
100pF
50V
CHB
+5V_TU
L700
BLM18PG121SN1D
R709
0
IF_N_CHB
15:A3
C721
47pF
50V
C725
100pF
50V
C705
22uF
16V
C701
22uF
16V
OPT
R712
3.3K
CHB
+3.3V_TU
C706
0.1uF
16V
CHB
+5V_TU
R714 0
NON_CHB
R701
0
CHB
R734 0
NON_CHB
CVBS_CHB
+1.8V_TU
C718
2.2uF
16V
L702
500
C717
2.2uF
16V
C724
0.1uF
50V
+1.26V_TU
+3.3V_TU
22uF
C722
IC700
AP1117EG-13
ADJ/GND
OUT IN
C723
22uF
10V
L703
BLM18PG121SN1D
R721
1
R718
120
R710
0
R717
0
CHB
R735
200
CHB
R731
200
CHB
R732
470
R737
82
+5V_NORMAL
TU700
TDVJ-H031F
TUNER_NON_CHB_V
DEV
14
3.3V
13
1.2V
5
N.C
12
GND
11
CVBS
2
N.C
10
N.C
4
N.C
1
N.C
17
IF_N
9
SIF
8
N.C
3
+5V
16
IF_AGC
7
SDA
6
SCL
15
RESET
18
IF_P
19
SHIELD
TU700-*1
TDVJ-H001F
TUNER_NON_CHB_H
DEV
14
3.3V
13
1.2V
5
AS
12
GND
11
VIDEO
2
BST_CNTL
10
NC
4
NC[RF_AGC]
1
ANT_PWR[OPT]
17
DIF_1
9
SIF
8
NC(IF_TP)
3
+B
16
IF_AGC_CNTL
7
SDA
6
SCL
15
RESET
18
DIF_2
19
SHIELD
TU701-*1
TDTD-V035F
TUNER_CHB_H
DEV
14
CVBS[MAIN]
13
SIF
5
DIF_2[SUB]
12
+B3[32V]
11
+B2[5V]
2
SCL[SUB]
19
IF_AGC[MAIN]
18
RESET[MAIN]
10
SDA[MAIN]
4
RESET[SUB]
1
+B1[1.8V]
17
+B5[3.3V][MAIN]
9
SCL[MAIN]
8
CVBS[SUB]
3
SDA[SUB]
16
+B4[1.2V][MAIN]
7
IF_AGC[SUB]
6
DIF_1[SUB]
15
GND
22
SHIELD
20
DIF_1[MAIN]
21
DIF_2[MAIN]
TU701
TDTD-V055F
TUNER_CHB_V
DEV
14
CVBS[MAIN]
13
SIF
5
IF_N[SUB]
12
32V
11
5V
2
SCL[SUB]
19
IF_AGC[MAIN]
18
RESET[MAIN]
10
SDA[MAIN]
4
RESET[SUB]
1
1.8V
17
3.3V[MAIN]
9
SCL[MAIN]
8
CVBS[SUB]
3
SDA[SUB]
16
1.2V[MAIN]
7
IF_AGC[SUB]
6
IF_P[SUB]
15
GND
22
SHIELD
20
IF_N[MAIN]
21
IF_P[MAIN]
+5V_TU
R739
200
OPT
CVBS_CHB_SEARCH
11:C4;AI6
R738
200
OPT
Q703
ISA1530AC1
OPT
E
B
C
CVBS_CHB_SEARCH
R740 0
NON_CHB
R733
220
R736
220
R702
0
R741
0
OPT
200mA
ATSC TUNER
60mA
CHB OPTION
CHB OPTION
NON CHB OPTION
R1
R2
VOUT = VREF *(1+R2/R1)
Vertical
Horizon
TUNER TYPE