Read LG 42SL90QD-DA (CHASSIS:LT91L) 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.
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.
TUNER
C1174
0.1uF
16V
R
1
1
2
7
0
R1118
4.7K
1/10W
5%
C1158
0.1uF
16V
0.1uF
16V
R1135
33
TUNER_SIF_IF_N
011:A4
C1153
22pF
50V
22pF
50V
LD1101
SAM2333
A
2
[
G
N
]
C
A
1
[
R
D
]
DTV_IF_P
C1125
0.1uF
16V
0.1uF
16V
+5V_TUNER
+3.3V_TU_RFSW
C1111
100pF
50V
100pF
50V
C1120
0.1uF
16V
0.1uF
16V
C491
0.1uF
16V
0.1uF
16V
OPT
C1176
0.1uF
16V
0.1uF
16V
+1.8V_TU_CE
C1127
0.1uF
16V
0.1uF
16V
R1131
10K
10K
IF_AGC
R1123
0
C1123
0.1uF
16V
0.1uF
16V
+3.3V_TU_LNA
R1134
33
R1140
100
TUNER_CVBS_IF_P
R1114
82
82
R1116
270
1/10W
1%
+5V_TUNER
C1117
10uF
6.3V
10uF
6.3V
C1156
0.1uF
16V
+3.3V_TU_CE
R1111
390
C1141
56pF
L1101
MLF1608A2R7J
+1.8V_TUNER
L1107
R1124
10K
10K
C1135
0.01uF
Q1103
ISA1530AC1
E
B
C
R1126
100K
100K
OPT
C1115
22uF
16V
16V
C1162
0.1uF
16V
C1133
1.2pF
50V
1.2pF
50V
OPT
R1120
0
D1102
RCLAMP0502B
C1146
0.1uF
16V
C1144
56pF
OPT
C1130
0.1uF
16V
0.1uF
16V
+3.3V_TU_CE
C1140
0.1uF
50V
0.1uF
50V
OPT
IC1105
CE6355
EAN60223501
1
VSS_1
2
VDD_1
3
VSS_2
4
CLK1
5
DATA1
6
IRQ
7
CVDD_1
8
VSS_3
9
RESET
10
SLEEP
11
STATUS
12
SADD4
13
VDD_2
14
VSS_4
15
SADD3
16
SADD2
17
SADD1
18
SADD0
19
CVDD_2
20
VSS_5
21
PLLVDD
22
PLLGND
23
XTI
24
XTO
25
VSS_6
26
PLLTEST
27
OSCMODE
28
AVDD
29
AGND_1
30
VIN
31
VIN
32
AGND_2
33
VDD_3
34
RFLEV
35
CLK2/GPP0
36
DATA2/GPP1
37
CVDD_3
38
VSS_7
39
CVDD_4
40
VSS_8
41
AGC2/GPP2
42
AGC1
43
GPP3
44
SMTEST
45
VDD_4
46
VSS_9
47
MOSTRT
48
MOVAL
49
MDO0
50
MDO1
51
MDO2
52
MDO3
53
MDO4
54
VDD_5
55
VSS_10
56
MDO5
57
MDO6
58
MDO7
59
CVDD_5
60
VSS_11
61
MOCLK
62
BKERR
63
MICLK
64
CVDD_6
+1.8V_TU_XE
R
1
1
0
8
3
9
0
IC1103
TB7601TU
3
VM
2
GND
4
OUTPUT
1
INPUT
6
VCC
5
VOUT
GND
C1183
0.1uF
16V
0.1uF
16V
IF_AGC
L1108
+3.3V_TU_CE
C1113
0.1uF
16V
0.1uF
16V
+3.3V_TU_XE
C1142
120pF
50V
C1105
0.1uF
16V
0.1uF
16V
R1138
1K
1K
C1118
10uF
6.3V
10uF
6.3V
C1182
18pF
50V
18pF
50V
Q1102
ISA1530AC1
E
B
C
R1125
10K
OPT
L1106
C1168
0.1uF
16V
R1103
0
0
+1.8V_TUNER
FE_TUNER_SCL
+5V_TUNER
R1102
680
680
TUNER_SIF_IF_N
FE_VMAIN
002:D24
C1143
39pF
50V
FE_TUNER_SDA
R1137
33
R1112
220
220
C1116
22uF
16V
16V
C1154
0.1uF
16V
C1166
0.1uF
16V
X1101
20.48MHz
+1.8V_TU_XE
Q1101
ISA1530AC1
E
B
C
C1148
0.1uF
+1.8V_TUNER
R1106
0
0
1/16W
5%
5%
C1138
0.1uF
16V
0.1uF
16V
+1.8V_TU_CE
C1150
0.1uF
R
1
1
1
0
3
9
0
C1132
0.1uF
50V
0.1uF
50V
OPT
+3.3V_TU_CE
C1159
0.1uF
16V
+5V_TUNER
R1117
10
1/10W
1%
FE_TS_SYNC
001:AJ18
C1180
0.1uF
16V
0.1uF
16V
+1.8V_TU_CE
+3.3V_TU_CE
FE_TS_DATA
LNA_SWITCH_SEL
C1157
0.1uF
16V
/FE_RESET
+3.3V_TUNER
R1101
680
680
DTV_IF_N
C1122
0.1uF
16V
0.1uF
16V
C1137
3.3pF
R1132
10K
10K
+1.8V_TU_XE
RF_SWITCH_SEL
+1.8V_TU_CE
IC1106
XC5000
1
VDDA_1
2
IN1
3
GND_1
4
IN2
5
GND_2
6
EXTCHOKE
7
GND_3
8
VDDA_2
9
VDDA_3
10
VDDC_1
11
GND_4
12
VDDC_2
13
VDDC_3
14
VDDA_4
15
VAGC
16
VIF
17
VDDA_5
18
SIF
19
GND_5
20
VDDC_4
21
VDDA_6
22
GND_6
23
VDDD_1
24
TESTMODE
25
DDI1
26
VDDC_5
27
DDI2
28
ADDRSEL
29
X2
30
GND_7
31
X1
32
EXTREF
33
VDDD_2
34
SCL
35
SDA
36
GND_8
37
RESET
38
VI2C
39
VDDC_6
40
VREF_N
41
VREF_P
42
VDDC_7
43
VDDC_8
44
REXT
45
VDDA_7
46
GND_9
47
VDDC_9
48
VDDA_8
C1172
0.1uF
16V
0.1uF
16V
C1110
0.1uF
16V
0.1uF
16V
D1101
RCLAMP0502B
+3.3V_TUNER
C1169
0.1uF
16V
+3.3V_TU_XE
IC1101
AZ1117H-3.3
2
OUTPUT
3
INPUT
1
ADJ/GND
FE_SIF
002:T17
C1121
0.1uF
16V
0.1uF
16V
R1115
4.7K
1/10W
5%
C1155
1000pF
50V
R1104
0
0
C1128
1.2pF
50V
1.2pF
50V
OPT
C1151
22pF
50V
22pF
50V
R1141
100
C1101
0.1uF
0.1uF
16V
/DEMOD_RESET
001:N20
R1136
1K
FE_TUNER_SDA
C492
0.1uF
16V
0.1uF
16V
OPT
R1129
0
R1113
390
R1128
4.99K
1%
C1124
0.1uF
16V
0.1uF
16V
C1170
0.1uF
16V
C1112
0.1uF
16V
0.1uF
16V
C1102
0.1uF
16V
0.1uF
16V
L1105
C1181
18pF
50V
18pF
50V
C1114
0.1uF
16V
0.1uF
16V
R1119
2K
C1175
0.1uF
16V
L1112
1008CS-821XGLC
820nH 2%
C1161
0.1uF
16V
0.1uF
16V
C1139
0.01uF
L1134
12nH
DTV_IF_N
011:AK27
C1107
0.1uF
16V
0.1uF
16V
+1.8V_TU_XE
FE_TS_VAL
L1109
270nH
R1121
0
C1147
1000pF
50V
C1152 0.1uF
16V
DTV_IF_P
C1108
0.1uF
16V
0.1uF
16V
R1107
0
0
OPT
C1173
0.1uF
16V
0.1uF
16V
C1149
0.1uF
C1106
0.1uF
16V
0.1uF
16V
FE_TS_CLK
Q1104
ISA1530AC1
E
B
C
+3.3V
+3.3V
FE_TUNER_SCL
C1126
0.1uF
16V
0.1uF
16V
+1.8V_TU_XE
C1160
0.1uF
16V
C1167
0.1uF
16V
C1136
1uF
50V
50V
OPT
R1105
0
0
1/16W
5%
5%
R1122
0
1/16W
5%
5%
L1111
390nH
C1119
0.1uF
16V
0.1uF
16V
+3.3V_TUNER
R1130
33
L1129
12nH
C1109
22uF
16V
16V
+3.3V_TU_CE
C1163
0.1uF
16V
C
1
1
7
1
2
2
p
F
OPT
R1139
1K
1K
+3.3V_TU_RFSW
C1165
0.1uF
16V
C
1
1
6
4
2
2
p
F
OPT
C1177
0.1uF
16V
+1.8V_TU_CE
C1131
3.3pF
50V
3.3pF
50V
X1103
31.875MHz
4
GND_2
1
X-TAL_1
2
GND_1
3
X-TAL_2
R1133
33
+5V_TUNER
L1110
6.8nH
TUNER_CVBS_IF_P
L1102
MLF1608A2R7J
R
1
1
0
9
0
+5V_TUNER
IC1104
PE42742G-20
1
GND_1
3
RF1
7
GND_6
9
GND_7
10
GND_8
11
GND_9
12
GND_10
13
RF2
14
GND_11
15
GND_12
16
C2
17
C1
18
VSS/GND_13
19
GND_14
20
VDD
5
GND_4
8
RFC
6
GND_5
4
GND_3
2
GND_2
IC1102
AZ1117H-1.8TRE1(EH13A)
2
OUTPUT
3
INPUT
1
ADJ/GND
+3.3V_TU_XE
C1145
0.1uF
C
1
1
7
9
1
5
p
F
5
0
V
C1178
15pF
50V
C1103
6.8pF
50V
6.8pF
50V
C1104
6.8pF
50V
6.8pF
50V
L416
+3.3V_TUNER
+3.3V_TU_RFSW
+3.3V_TU_LNA
L417
+3.3V_TUNER
L1104
JK1102
KCN-BT-2-0082
1
2
JK1101
KCN-BT-2-0082
1
2
R1142
0
0
1/10W
5%
5%
L1113
LQH32MN2R2K23L
TUNER
11 11
2%
2%
EAX61268901
2009.04.23
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