LG 32LH20FD (CHASSIS:LC91A) Service Manual ▷ View 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.
Module & sub
+5V_ST
LVB_CKM
Q1301
2SC3052
OPT
E
B
C
+5V_ST
Q1300
2SC3052
OPT
E
B
C
LVB_0M
LVB_1P
LVB_0P
R1322
100
LVB_4P
LVB_2M
R1378
3.3K
JEIDA
C1304
0.1uF
16V
OPT
LVB_CKP
LVB_3M
LVB_2P
ZD1306
5.6V
AMOTECH
P1304
12507WS-12L
1
SCL
2
SDA
3
GND
4
KEY1
5
KEY2
6
5V_ST
7
GND
8
WARM_ST
9
IR
10
GND
11
3.3V
12
PWR_ON
13
GND
L1303
BLM18PG121SN1D
L1308
BLM18PG121SN1D
L1307
BLM18PG121SN1D
L1301
BLM18PG121SN1D
PANEL_POWER
L1300
BLM18PG121SN1D
+3.3V
+3.3V
PWM_DIM
001:S17;007:L16
OPC_OUT1
007:L17
OPC_EN
001:AJ13
+3.3V
IR_OUT
004:T8
C1303
220uF
16V
OPT
BIT_SEL
001:AJ20
R1373
0
OPC_DISABLE
R1367
22
OPT
LVDS_SEL
001:AJ11
R1365
22
OPC_ENABLE
R1366
22
OPC_ENABLE
R1371
0
8BIT
R1379
0
VESA
R1370
3.3K
10BIT
LVA_4P
R1321
100
LVA_CKP
LVA_3M
R1325
4.7K
LVA_1P
LVA_2P
LVA_1M
LVA_0M
LVA_2M
LVA_4M
LVA_0P
LVA_3P
LVA_CKM
R1319
4.7K
R1320
4.7K
D1301
5.6V
CDS3C05HDMI1
D1300
5.6V
CDS3C05HDMI1
ZD1304
5.6V
AMOTECH
ZD1302
5.6V
AMOTECH
ZD1303
5.6V
AMOTECH
C1309
100pF
50V
C1315 1000pF 50V
C1311
1000pF
50V
C1307
0.1uF
C1305
0.1uF
C1310
0.1uF
16V
C1314 0.1uF
16V
R1318
100
R1317
100
LED_ON
001:AA19
+3.3V_ST
KEY2
001:AA19
KEY1
001:AA19
+5V_ST
SCL_SUB/AMP
001:D22;006:K12
IR
001:AA20
SDA_SUB/AMP
001:D22;006:K12
+3.3V
LVB_3P
LVB_4M
LVB_1M
R1372
510
OPT
C1300
0.1uF
16V
C1301
1000pF
50V
C1317
0.1uF
R1300
22
OPT
R1301
47K
OPT
R1303
47K
OPT
R1304
47K
OPT
R1302
10K
OPT
R1305
100
R1312
OPT
OPT
R1313
OPT
OPT
R1314
OPT
OPT
R1315
OPT
OPT
P1301
TF05-51S
1
[51]VLCD
2
[50]VLCD
3
[49]VLCD
4
[48]VLCD
5
[47]NC
6
[46]GND
7
[45]GND
8
[44]GND
9
[43]GND
10
[42]GND
11
[41]R2EP
12
[40]R2EN
13
[39]R2DP
14
[38]R2DN
15
[37]GND
16
[36]R2CLKP
17
[35]R2CLKN
18
[34]GND
19
[33]R2CP
20
[32]R2CN
21
[31]R2BP
22
[30]R2BN
23
[29]R2AP
24
[28]R2AN
25
[27]BIT_SEL
26
[26]GND
27
[25]R1EP
28
[24]R1EN
29
[23]R1DP
30
[22]R1DN
31
[21]GND
32
[20]R1CLKP
33
[19]R1CLKN
34
[18]GND
35
[17]R1CP
36
[16]R1CN
37
[15]R1BP
38
[14]R1BN
39
[13]R1AP
40
[12]R1AN
41
[11]GND
42
[10]OPC_EN
43
[9] OPC_OUT
44
[8] VBR_EXT
45
[7] LVDS_SEL
46
[6] NC
47
[5] NC
48
[4] NC
49
[3] NC
50
[2] NC
51
[1] Reverse
52
.
R1369
510
V4
R1323
0
R1324
10K
L1311
BLM18PG121SN1D
EAX60736302
8 9
2009.02.27
Module
CONTROL
IR & LED
close to wafer
Zener Diode is
OPC ENABLE (option)
Reverse
LVDS_SEL
OPC_EN
BIT_SEL
Enable
Disable
Disable
Enable
JEIDA
VESA
10bit(D)
8bit
H
L
/ NC
51 [1]
L / NC
H
45 [7]
HL
42 [10]
25 [27]
H / NC
L
LC91A(32/37/42/47LH40FD-CE)
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.
TUNER
LGDT_SDQ[1]
LGDT_SDQ[3]
LGDT_SDQ[15]
LGDT_SADDR[2]
LGDT_SADDR[9]
LGDT_SDQ[0]
LGDT_SDQ[15]
LGDT_SDQ[14]
LGDT_SADDR[7]
LGDT_SDQ[12]
LGDT_SADDR[6]
LGDT_SADDR[1]
LGDT_SADDR[9]
LGDT_SDQ[8]
LGDT_SDQ[4]
LGDT_SDQ[9]
LGDT_SDQ[8]
LGDT_SADDR[3]
LGDT_SADDR[8]
LGDT_SADDR[10]
LGDT_SDQ[7]
LGDT_SDQ[5]
LGDT_SDQ[13]
LGDT_SADDR[6]
LGDT_SDQ[7]
LGDT_SADDR[5]
LGDT_SDQ[10]
LGDT_SDQ[2]
LGDT_SADDR[8]
LGDT_SDQ[11]
LGDT_SDQ[6]
LGDT_SADDR[0]
LGDT_SADDR[1]
LGDT_SADDR[3]
LGDT_SADDR[5]
LGDT_SDQ[1]
LGDT_SDQ[6]
LGDT_SDQ[10]
LGDT_SDQ[13]
LGDT_SDQ[2]
LGDT_SDQ[12]
LGDT_SDQ[3]
LGDT_SADDR[4]
LGDT_SDQ[9]
LGDT_SDQ[11]
LGDT_SADDR[10]
LGDT_SDQ[5]
LGDT_SADDR[4]
LGDT_SADDR[2]
LGDT_SDQ[0]
LGDT_SDQ[14]
LGDT_SADDR[7]
LGDT_SADDR[0]
LGDT_SDQ[4]
R1721
1K
1/16W
5%
R1768
0
LGDT_SRAS
009:Y27
TU_SDA_5V
009:K12
R1764
200
LGDT_SWE
009:T28
C1734
22pF
50V
R1737
100
R1707
47
LGDT_SCLK
009:W36
TU_IF_OUT+
009:D34
FE_VMAIN
002:E23
R1736
100
R1743
100
C1716
0.01uF
25V
+3.3V_DTMB
C1745
22pF
50V
+1.2V_DTMB
LGDT_SCAS
009:Y28
FE_TS_SERIAL
001:AL16
C1733
1uF
OPT
C1715
0.1uF
16V
TU_SCL_3.3V
009:F29
TU_IF_OUT-
009:AT3
R1718
0
IC1708
SSM6N15FU
0TFTH80001A
OPT
3
DRAIN2
2
GATE1
1
SOURCE1
4
SOURCE2
5
GATE2
6
DRAIN1
R1741
100
FE_TS_VAL_ERR
001:AL16
C1712
47pF
50V
FE_TS_DATA_CLK
001:AL17
R1712
0
OPT
R1729
4.7K
OPT
LGDT_SDQ[0-15]
TU_IF_OUT+
009:AT4
R1719
0
FE_DEMOD_SDA
001:D21
TU_SCL_5V
009:AQ7
LGDT_SBA[0]
009:V24
Q1704
2SA1504S
E
B
C
BLKERR
009:G21
R1769
100
+3.3V_DTMB
C1746
22pF
50V
C1776
100uF
16V
OPT
R1713
470
SYNCLOCK
009:H27
R1742
100
D1701
SAM2333
LDPC ERR
A2[GN]
C
A1[RD]
LGDT_SBA[1]
009:Y27
X1700
30.4MHz
R1705
0
C1775
10uF
10V
LGDT_SADDR[0-10]
Q1705
2SC3875S(ALY)
E
B
C
TU_IF_AGC
009:AQ7
R1744
4.7K
D1700
SAM2333
LOCK
A2[GN]
C
A1[RD]
+5V_TUNER
LGDT_SRAS
009:T27
R1734
4.7K
LGDT_SBA[1]
009:V24
R1708
47
R1714
0
OPT
FE_DEMOD_SCL
001:D21
C1744
22pF
50V
C1719
0.1uF
16V
/FE_RESET
001:X26
R1738 4.7K
LGDT_SCLK
009:AG28
RF_SWITCH_SEL
001:X25;002:P22
BLKERR
009:H27
R1704
0
+3.3VA_DTMB
TU_SDA_3.3V
009:S12
LGDT_SDQ[0-15]
R1720
0
R1711
4.7K
C1736
22pF
50V
TU_SDA_5V
009:AQ7
R1773
10K
C1714
0.01uF
25V
LGDT_SCKE
009:AG27
LGDT_SWE
009:Y28
R1765
47
R1700
0
TU_IF_AGC
009:C31
R1716
270
TU_SDA_3.3V
009:F29
IC1707
HY57V641620FTP
HYNIX 64MBIT
26
A3
27
VDD3
28
VSS1
29
A4
30
A5
31
A6
32
A7
33
A8
34
A9
35
A11
36
NC1
37
CKE
38
CLK
39
UDQM
40
NC2
41
VSS2
42
DQ8
43
VDDQ3
44
DQ9
45
DQ10
46
VSSQ3
47
DQ11
48
DQ12
49
VDDQ4
50
DQ13
17
CAS
3
VDDQ1
6
VSSQ1
16
WE
15
LDQM
14
VDD2
13
DQ7
12
VSSQ2
11
DQ6
10
DQ5
9
VDDQ2
8
DQ4
7
DQ3
4
DQ1
5
DQ2
25
A2
24
A1
23
A0
2
DQ0
22
A10/AP
21
BA1
1
VDD1
20
BA0
19
CS
18
RAS
51
DQ14
52
VSSQ4
53
DQ15
54
VSS3
SYNCLOCK
009:G20
C1720
10uF
10V
LGDT_SCKE
009:W37
C1717
220pF
50V
OPT
R1772
OPT
C1708
47pF
50V
R1717
270
+5V_TUNER
LGDT_SCS
009:T27
FE_SIF
002:S17
LGDT_SADDR[0-10]
TU_SCL_3.3V
009:K13
C1713
0.01uF
25V
LGDT_SCAS
009:T27
R1771
2.2K
C1721
10uF
10V
+5V_TUNER
R1731
4.7K
OPT
R1770
0
+3.3V_DTMB
TU_IF_OUT-
009:D34
C1735
22pF
50V
R1715
82
IC1707-*1
M12L64164A-5TG
ELITE 64MBIT
26
A3
27
VDD_3
28
VSS_1
29
A4
30
A5
31
A6
32
A7
33
A8
34
A9
35
A11
36
NC_1
37
CKE
38
CLK
39
UDQM
40
NC_2
41
VSS_2
42
DQ8
43
VDDQ_3
44
DQ9
45
DQ10
46
VSSQ_3
47
DQ11
48
DQ12
49
VDDQ_4
50
DQ13
17
CAS
3
VDDQ_1
6
VSSQ_1
16
WE
15
LDQM
14
VDD_2
13
DQ7
12
VSSQ_2
11
DQ6
10
DQ5
9
VDDQ_2
8
DQ4
7
DQ3
4
DQ1
5
DQ2
25
A2
24
A1
23
A0
2
DQ0
22
A10/AP
21
A12
1
VDD_1
20
A13
19
CS
18
RAS
51
DQ14
52
VSSQ_4
53
DQ15
54
VSS_3
R1701
0
+3.3V_DTMB
C1701
100pF
50V
+5V_TUNER
FE_TS_SYN
001:AL16
TU_SCL_5V
009:S13
R1766
47
LGDT_SBA[0]
009:Y27
+5V_TUNER
LGDT_SCS
009:Y27
FE_BOOSTER_CTL
001:AJ11
C1718
0.1uF
16V
+3.3V_DTMB
R1767
47
+5V_TUNER
R1722
1K
1/16W
5%
+3.3V_DTMB
R1702
47
C1702
0.1uF
16V
C1704
0.1uF
16V
C1709
0.1uF
16V
C1777
0.01uF
25V
R1746
47
C1722
0.1uF
16V
C1723
0.1uF
16V
C1724
0.1uF
16V
C1725
0.1uF
16V
C1726
0.1uF
16V
C1728
0.1uF
16V
C1729
0.1uF
16V
C1730
0.1uF
16V
C1731
0.1uF
16V
C1737
0.1uF
16V
C1739
0.1uF
16V
C1740
0.1uF
16V
C1741
0.1uF
16V
C1742
0.1uF
16V
C1743
0.1uF
16V
C1748
0.1uF
16V
C1749
0.1uF
16V
C1764
0.1uF
16V
C1768
0.1uF
16V
C1769
0.1uF
16V
C1770
0.1uF
16V
C1771
0.1uF
16V
C1772
0.1uF
16V
C1773
0.1uF
16V
C1750
18pF
C1751
18pF
R1754
470
R1756
470
R1755
1M
R1751
0
R1752
0
R1753
0
OPT
C1706
220uF
16V
C1707
220uF
16V
L1701
MLB-201209-0120P-N2
L1702
MLB-201209-0120P-N2
IC1701
LG3900
1
CMDC
2
AVDD33_1
3
AVSS_1
4
AIFINN
5
AIFINP
6
VREFN
7
VREFP
8
AVDD33_2
9
AVSS_2
10
I2CSEL
11
AGCOUT
12
TUNSCL
13
TUNSDA
14
VSS_1
15
VDD_1
16
GPIO[5]
17
GPIO[4]
18
VDD33_1
19
GPIO[3]
20
GPIO[2]
21
VSS_2
22
GPIO[1]
23
GPIO[0]
24
LOCK
25
nERROR
26
SCL
27
SDA
28
nRESET
29
TPVALID
30
TPDATA[0]
31
TPDATA[1]
32
VSS_3
33
TPDATA[2]
34
TPDATA[3]
35
TPDATA[4]
36
TPDATA[5]
37
VDD33_2
38
VDD_2
39
TPDATA[6]
40
TPDATA[7]
41
TPCLK
42
TPSOP
43
VSS_4
44
SADDR[3]
45
SADDR[2]
46
SADDR[1]
47
SADDR[0]
48
SADDR[10]
49
SBA[1]
50
SBA[0]
51
nSCS
52
VSS_5
53
nSRAS
54
nSCAS
55
VDD33_3
56
nSWE
57
SDQ[7]
58
SDQ[6]
59
VDD_3
60
SDQ[5]
61
SDQ[4]
62
SDQ[3]
63
VSS_6
64
SDQ[2]
65
SDQ[1]
66
SDQ[0]
67
VDD_4
68
VDD33_4
69
SDQ[15]
70
SDQ[14]
71
VSS_7
72
SDQ[13]
73
SDQ[12]
74
SDQ[11]
75
SDQ[10]
76
VSS_8
77
SDQ[9]
78
SDQ[8]
79
SCLK
80
SCKE
81
SADDR[9]
82
SADDR[8]
83
SADDR[7]
84
VDD33_5
85
VSS_9
86
SADDR[6]
87
SADDR[5]
88
VDD_5
89
SADDR[4]
90
OPM[0]
91
OPM[1]
92
OPM[2]
93
TMOD
94
VSS_10
95
XTALI
96
XTALO
97
VDD33_6
98
TESTSE
99
VDD_6
100
VSS_11
TU1702
TDFR-Z751D
14
GND
13
NC_4
5
RF_AGC
12
TU_IF
11
NC_3
2
GAIN-SW
19
NC_7
18
SCL
10
NC_2
4
VTU
1
CTR
17
SDA
9
VIDEO
8
SIF
3
+B1
16
NC_6
7
NC_1
6
+B2
15
NC_5
24
SHIELD
20
IF_AGC
21
DIF1
22
DIF2
23
NC_8
L1709 CM2012FR47KT 0.47uH
C1792
39pF
50V
L1707
CM2012FR22KT
220nH
C1790
24pF
L1708
CM2012FR22KT
220nH
C1791
24pF
Q1702
ISA1530AC1
E
B
C
Q1703
ISA1530AC1
E
B
C
ROUTE SYMMETRICALLY
DEMODULATOR LGDT3900
TUNER TDFR-Z751D
9 9
EAX60736302
2009.02.27
Close to IC
Close to tuner
LC91A(32/37/42/47LH40FD-CE)
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.
P3000
SMAW200-04
1
KEY1
2
GND
3
KEY2
4
GND
SW3001
KPT-1115AM
SW3002
KPT-1115AM
SW3003
KPT-1115AM
SW3004
KPT-1115AM
SW3005
KPT-1115AM
SW3006
KPT-1115AM
SW3007
KPT-1115AM
ZD3002
5.1V
OPT
ZD3001
5.1V
OPT
TP3001
TP3002
SW3008
KPT-1115AM
R3005
10K
10K
R3001
10K
10K
R3006
4.7K
4.7K
R3002
4.7K
4.7K
R3003
1.8K
1.8K
R3007
1.8K
1.8K
R3004
270
270
R3008
270
EAX56916201
2008.09.23
1
1
CONTROL
KEY1
KEY2
CH+
CH-
VOL+
VOL-
ENTER
MENU
INPUT
POWER
1.65V
2.2449V
0.9138V
0.1792V
1.65V
2.2449V
0.9138V
0.1792V