LG 32LH20FD, Service Manual

Page: 26 / 28

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
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
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
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)