Read LG 32LH20D (CHASSIS:LB91A) 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
+1.8V_TU_XE
FE_SIF
002:T16
+1.8V_TU_CE
C432
0.1uF
16V
DTV_IF_P
+1.8V_TU_XE
+3.3V_TU_XE
+5V_TUNER
C462
0.1uF
16V
0.1uF
16V
IC403
AZ1117H-3.3
2
OUTPUT
3
INPUT
1
ADJ/GND
L414
TUNER_SIF_IF_N
+1.8V_TU_CE
C475
0.1uF
16V
0.1uF
16V
+1.8V_TUNER
L403
OPT
1uH
C463
0.1uF
16V
0.1uF
16V
+3.3V_TU_CE
+3.3V_TU_CE
R463
10K
10K
R446
10K
OPT
+5V_TUNER
DTV_IF_N
004:AK27
+1.8V_TUNER
R449
100K
100K
OPT
C
4
6
5
2
2
p
F
OPT
R458
33
R404
0
0
1/16W
5%
5%
+3.3V_TUNER
R406
0
0
OPT
R435
0
R422
0
0
+5V_TUNER
C467
10uF
6.3V
10uF
6.3V
C474
0.1uF
16V
0.1uF
16V
C449
18pF
50V
18pF
50V
C424
0.1uF
16V
C471
0.1uF
16V
0.1uF
16V
FE_TUNER_SDA
R442
0
1/16W
5%
5%
C455
0.1uF
16V
0.1uF
16V
+1.8V_TU_CE
+3.3V_TU_CE
R448
33
C437
0.1uF
16V
+3.3V_TU_XE
C421
0.1uF
TUNER_CVBS_IF_P
+1.8V_TU_XE
IC402
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
C
4
6
4
2
2
p
F
OPT
+1.8V_TUNER
C444
270pF
270pF
OPT
+5V_TUNER
FE_VMAIN
002:E22
L405
6.8nH
+3.3V_TU_XE
L415
+3.3V_TUNER
C440
0.1uF
16V
C418
0.1uF
16V
L413
+1.8V_TU_CE
IC405
AZ1117H-1.8TRE1(EH13A)
2
OUTPUT
3
INPUT
1
ADJ/GND
R424
0
C427
0.1uF
16V
+5V_TUNER
+1.8V_TU_XE
R462
33
C482
0.1uF
16V
0.1uF
16V
C435
0.1uF
16V
R464
10K
10K
C477
0.1uF
16V
0.1uF
16V
C460 0.1uF
16V
C457
22uF
16V
16V
+1.8V_TU_CE
C480
0.1uF
16V
0.1uF
16V
C466
0.1uF
16V
0.1uF
16V
R412
4.99K
1%
FE_TUNER_SDA
C445
0.1uF
16V
C420
0.1uF
R461
33
+3.3V_TU_CE
R
4
5
3
0
C452
0.1uF
16V
0.1uF
16V
C448
18pF
50V
18pF
50V
TUNER_SIF_IF_N
004:B2
C472
0.1uF
16V
0.1uF
16V
DTV_IF_N
C416
56pF
OPT
C459
22pF
50V
22pF
50V
C431
0.1uF
16V
C413
56pF
L409
CM2012F2R2KT
R411
680
680
R443
0
R
4
1
6
0
C458
22uF
16V
16V
FE_TS_DATA
R436
0
R410
82
82
C439
0.1uF
16V
0.1uF
16V
C419
1000pF
50V
IF_AGC
+3.3V_TU_CE
C479
0.1uF
16V
0.1uF
16V
R414
0
0
TUNER_CVBS_IF_P
C468
10uF
6.3V
10uF
6.3V
C470
0.1uF
16V
0.1uF
16V
+5V_TUNER
FE_TUNER_SCL
/DEMOD_RESET
001:M18;004:L1
R405
0
0
1/16W
5%
5%
DTV_IF_P
C417
0.1uF
C443
0.1uF
16V
0.1uF
16V
C456
0.1uF
16V
0.1uF
16V
R468
1K
1K
FE_TUNER_SCL
LD401
SAM2333
A
2
[
G
N
]
C
A
1
[
R
D
]
FE_TS_SYNC
001:AM18
C476
0.1uF
16V
0.1uF
16V
L412
GND
C422
0.1uF
R472
1K
1K
C433
0.1uF
16V
C434
0.1uF
16V
FE_TS_VAL
C425
1000pF
50V
C473
0.1uF
16V
0.1uF
16V
C454
0.1uF
16V
0.1uF
16V
+3.3V_TU_CE
R401
680
680
R444
10K
10K
+1.8V_TU_XE
IF_AGC
C453
22uF
16V
16V
+3.3V_TUNER
C469
0.1uF
16V
0.1uF
16V
L411
R413
0
0
FE_TS_CLK
C451
0.1uF
16V
0.1uF
16V
C461
22pF
50V
22pF
50V
R466
1K
C426
0.1uF
16V
R441
2K
IC404
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
R
4
1
5
3
9
0
R409
390
R
4
0
8
3
9
0
R421
390
C442
0.1uF
16V
0.1uF
16V
C411
0.1uF
16V
0.1uF
16V
C430
0.1uF
16V
0.1uF
16V
C410
0.1uF
16V
0.1uF
16V
L408
1008CS-821XGLC
820nH 2%
C436
0.1uF
16V
C428
0.1uF
16V
C429
0.1uF
16V
C438
0.1uF
16V
C441
0.1uF
16V
C423
10pF
50V
10pF
50V
C409
10pF
50V
10pF
50V
Q402
ISA1530AC1
E
B
C
Q401
ISA1530AC1
E
B
C
Q403
ISA1530AC1
E
B
C
Q404
ISA1530AC1
E
B
C
/FE_RESET
R470
33
JK402
PAL-STRAIGHT
OPT
1
2
D401
EAH36618701
L402
MLF1608A2R7J
L407
MLF1608A2R7J
L404
270nH
C415
39pF
50V
L406
390nH
C446
18pF
50V
C
4
4
7
1
8
p
F
5
0
V
X402
20.48MHz
JK401
KCN-ET-0-0094
1
2
C414
120pF
50V
R437
100
R438
100
X403
31.875MHz
4
GND_2
1
X-TAL_1
2
GND_1
3
X-TAL_2
L410
0
0
1/10W
5%
5%
C450
8pF
8pF
50V
EAX59793902(0)
4 11
2009.01.31
2%
2%
AUS_LH20/LH35
Shield PAL Jack
EAX59793902(0)_AUS_MERCURY
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