22LU50FD (CHASSIS:LC91M) - LG TV Service Manual (repair manual). Page 26

Read LG 22LU50FD (CHASSIS:LC91M) 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.
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:X28
TU_SDA_5V
009:AG6
R1764
200
LGDT_SWE
009:S29
C1734
22pF
50V
R1737
100
R1707
47
LGDT_SCLK
009:V37
TU_IF_OUT+
009:C35
FE_VMAIN
002:E23
R1736
100
R1743
100
C1716
0.01uF
25V
+3.3V_DTMB
C1745
22pF
50V
+1.2V_DTMB
LGDT_SCAS
009:X29
FE_TS_SERIAL
001:AM17
C1733
1uF
OPT
C1715
0.1uF
16V
TU_SCL_3.3V
009:E30
TU_IF_OUT-
009:P4
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:AM18
C1712
47pF
50V
FE_TS_DATA_CLK
001:AM18
R1712
0
OPT
R1729
4.7K
OPT
LGDT_SDQ[0-15]
TU_IF_OUT+
009:P5
R1719
0
FE_DEMOD_SDA
001:D21
TU_SCL_5V
009:N8
LGDT_SBA[0]
009:U25
Q1704
2SA1504S
E
B
C
BLKERR
009:G22
R1769
100
+3.3V_DTMB
C1746
22pF
50V
C1776
100uF
16V
OPT
R1713
470
SYNCLOCK
009:H28
R1742
100
D1701
SAM2333
LDPC ERR
A2[GN]
C
A1[RD]
LGDT_SBA[1]
009:X28
X1700
30.4MHz
R1705
0
C1775
10uF
10V
LGDT_SADDR[0-10]
Q1705
2SC3875S(ALY)
E
B
C
TU_IF_AGC
009:N7
R1744
4.7K
D1700
SAM2333
LOCK
A2[GN]
C
A1[RD]
+5V_TUNER
LGDT_SRAS
009:S28
R1734
4.7K
LGDT_SBA[1]
009:U25
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:AF29
RF_SWITCH_SEL
001:X25
BLKERR
009:H28
R1704
0
+3.3VA_DTMB
TU_SDA_3.3V
009:AO6
LGDT_SDQ[0-15]
R1720
0
R1711
4.7K
C1736
22pF
50V
TU_SDA_5V
009:N8
R1773
10K
C1714
0.01uF
25V
LGDT_SCKE
009:AF28
LGDT_SWE
009:X29
R1765
47
R1700
0
TU_IF_AGC
009:B32
R1716
270
TU_SDA_3.3V
009:E30
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:G21
C1720
10uF
10V
LGDT_SCKE
009:V38
C1717
220pF
50V
OPT
R1772
OPT
C1708
47pF
50V
R1717
270
+5V_TUNER
LGDT_SCS
009:S28
FE_SIF
002:S17
LGDT_SADDR[0-10]
TU_SCL_3.3V
009:AG7
C1713
0.01uF
25V
LGDT_SCAS
009:S28
R1771
2.2K
C1721
10uF
10V
+5V_TUNER
R1731
4.7K
OPT
R1770
0
+3.3V_DTMB
TU_IF_OUT-
009:C35
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:AM17
TU_SCL_5V
009:AO7
R1766
47
LGDT_SBA[0]
009:X28
+5V_TUNER
LGDT_SCS
009:X28
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
C1824
0.1uF
16V
+5V_TUNER
R1800
10K
1/8W
1%
C1800
22uF
R1808
10K
C1815
0.1uF
16V
+6V_DTMB
+6V_DTMB
C1810
1000pF
OPT
C1817
100uF
16V
C1829
22uF
16V
R1806
2K
1/10W
C1805
0.1uF
50V
+3.3V_DTMB
R1803
62K
1%
C1803
OPT
C1821
4.7uF
10V
+12V/+15V
C1828
0.1uF
16V
R1802
0
R1801
10K
1/10W
C1826
0.1uF
16V
C1823
4.7uF
10V
C1818
22uF
16V
3225
D1800
100V
1N4148W_DIODES 
L1802
CIC21J501NE
C1809
10uF
10V
C1808
0.1uF
16V
L1805
BLM18PG121SN1D
R1809
5.1K
C1816
100uF
16V
C1804
47uF
16V
C1812
0.1uF
16V
R1807
5.1K 1%
+6V_TUNER
R1804
0
C1814
0.47uF
25V
IC1804
KIA78R033F
1
VIN
2
VC
3
VOUT
4
NC
5
GND1
6
GND2
C1811
100uF
16V
IC1803
SC4215ISTRT
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
C1820
100uF
16V
C1806
100uF
16V
IC1800
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
+3.3V
C1813
1uF
10V
+12V/+15V
IC1801
BA50BC0WFP-E2 
1
CTL
2
VCC
3
GND
4
OUT
5
NC
+6V_TUNER
C1807
0.1uF
16V
C1827
0.1uF
16V
+3.3VA_DTMB
C1825
0.1uF
50V
R1805
10
1/10W
1%
C1819
0.1uF
16V
C1822
0.1uF
16V
L1800
CIC21J501NE
L1803
3.6uH
NR8040T3R6N
+1.2V_DTMB
L1804
BLM18PG121SN1D
Q1702
ISA1530AC1
E
B
C
Q1703
ISA1530AC1
E
B
C
IC1802
AP1117E33G-13 
OUT
IN
ADJ/GND
L1806
BLM18PG121SN1D
6V_PULL_UP
C1830
0.1uF
16V
6V_PULL_UP
PULL_UP_INV_ON
C1831
0.1uF
16V
5V_PULL_UP
PULL_UP_INV_ON
L1807
BLM18PG121SN1D
5V_PULL_UP
ROUTE SYMMETRICALLY
DEMODULATOR LGDT3900
TUNER TDFR-Z751D
9    9
EAX61023402
   2009.04.28
Close to IC
Close to tuner
LC91M(22/26LU50FD-CA)
FIN must be connected GND
+6V_FE
+5V_TUNER
+3.3VA_DTMB
Placed on SMD-TOP
4.9A 0.0150OHM 34MHZ
Close to IC
R1
Vout=0.8*(1+R1/R2)
Tuner & Demod Power
Close to IC
+3.3V/+1.2V_DTMB
R2
$0.07
Display
Click on the first or last page to see other 22LU50FD (CHASSIS:LC91M) service manuals if exist.
Random: