Read LG 47LH40FD (CHASSIS:LC91A) 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.
POWER
R862
47
+1.8V_DDR
+3.3V
+3.3V_AVDD
+12V
+3.3V
+1.8V_AMP
C847
4.7uF
16V
IC803
AP1117E18G-13
2
OUT
3
IN
1
ADJ/GND
IC801
AP1117E33G-13
2
OUT
3
IN
1
ADJ/GND
R843 1.8K
+3.3V_ST
+3.3V_AVDD_MPLL
L807
CB3216UA121
0.1uF
C856
L826
2.2uH
C837
22uF
L810
BLM18PG121SN1D
C849
22uF
16V
OPT
R854
0
+3.3V_ST
IC805
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
PANEL_CTL
001:AJ10
+3.3V_ST
+5V_ST
R824
22K
1%
+24V/+20V
Q804
2SC3052
E
B
C
R809
10.5K
1%
OPC_OUT1
008:K9
+1.8V_DDR
Q800
2SC3052
E
B
C
L808
BLM18PG121SN1D
R826
10
1%
C808
0.1uF
16V
R827
75K
1/8W
1%
+12V
R831
10K
1/10W
+3.3V
+5V_ST
L806
CB3216UA121
C843
22uF
16V
R801
0
OPT
L805
BLM18PG121SN1D
C836
10nF
50V
R871
8.2K
1%
C879
10uF
R807
33K
OPT
C887
1uF
10V
+5V_GENERAL
+5V_ST
POWER_ON/OFF1
001:AJ11;007:P8
L804
CB3216UA121
C803
0.1uF
16V
R872
10K
C832
68uF
35V
L817
BLM18PG121SN1D
+5V_ST
L813
3.6uH
NR8040T3R6N
AMP_VCC
C813
0.1uF
50V
C821
68uF
35V
OPT
L803
BLM18PG121SN1D
+3.3V
R830
10K
1/10W
OPT
C878
10uF
R825
22K
1%
+3.3V_ST
C838
22uF
OPT
PANEL_POWER
Q805
2SC3052
E
B
C
+3.3V_ST
C845
10uF
16V
OPT
C862
0.01uF
50V
L827
2.2uH
C889
10uF
10V
Q801
RT1P141C-T112
E
B
C
+5V_ST
Q802
2SC3052
E
B
C
+1.26V_VDDC
PWM_DIM
001:S17;008:K8
+24V/+20V
ERROR_OUT
001:AA21
INV_CTL
001:AJ10
C826
100uF
16V
C824
220uF
16V
A_DIM
001:S16
Q806
RSR025P03
S
D
G
POWER_ON/OFF1
001:AJ11;007:M5
R874
75K
5%
C882
330pF
R873
56000
5%
C883
330pF
C876
22uF
C880
22uF
L812
CIC21J501NE
C840
1uF
10V
P805
FW20020-24S
19
NC
14
12V
9
5.2V
4
GND
18
24/20V
13
12V
8
5.2V
3
GND
17
24/20V
12
GND
7
5.2V
2
PWR_ON
16
GND
11
GND
6
GND
1
NC
20
INV_ON
15
GND
10
5.2V
5
GND
21
A_DIM
22
ERROR_OUT
23
PWM_DIM2
24
PWM_DIM1
C800
100uF
16V
C802
0.1uF
16V
C806
100uF
16V
C807
0.1uF
16V
OPT
C814
0.1uF
16V
C811
0.1uF
16V
C815
0.1uF
16V
C820
0.1uF
16V
C865
0.1uF
16V
C822
100uF
16V
C825
0.1uF
16V
C827
0.1uF
16V
C841
0.01uF
25V
C842
0.1uF
16V
C859
0.1uF
16V
C877
0.1uF
16V
C885
0.1uF
16V
R800
10K
R802
10K
R804
10K
R805
10K
R814
100
R815
6.8K
OPT
R818
3.3K
R821
10K
R822
10K
R823
10K
OPT
R832
10K
OPT
R833
10K
R837
22K
R839
22K
0
R841
R842
10K
R856
4.7K
22
R859
OPC_DISABLE
R860
22
OPC_ENABLE
D801
100V
1N4148W_DIODES
OPT
R1800
10K
1/8W
1%
C1826
0.1uF
16V
C1819
0.1uF
16V
D1800
100V
1N4148W_DIODES
C1800
22uF
C1823
4.7uF
10V
+6V_TUNER
C1810
1000pF
OPT
R1805
10
1/10W
1%
C1822
0.1uF
16V
+6V_DTMB
C1825
0.1uF
50V
+6V_TUNER
+5V_TUNER
C1827
0.1uF
16V
R1801
10K
1/10W
L1800
CIC21J501NE
L1805
BLM18PG121SN1D
L1804
BLM18PG121SN1D
C1820
100uF
16V
C1805
0.1uF
50V
L1803
3.6uH
NR8040T3R6N
+3.3V
IC1800
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
C1813
1uF
10V
+12V
C1803
OPT
C1804
47uF
16V
C1816
100uF
16V
+1.2V_DTMB
R1808
10K
C1809
10uF
10V
C1828
0.1uF
16V
C1829
22uF
16V
C1811
100uF
16V
+3.3V_DTMB
R1809
5.1K
+6V_DTMB
IC1804
KIA78R033F
1
VIN
2
VC
3
VOUT
4
NC
5
GND1
6
GND2
C1815
0.1uF
16V
C1807
0.1uF
16V
IC1803
SC4215ISTRT
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
C1812
0.1uF
16V
IC1802
AZ1117D-3.3TRE1
1
ADJ/GND
2
OUTPUT
3
INPUT
C1806
100uF
16V
+3.3VA_DTMB
C1817
100uF
16V
+12V
C1808
0.1uF
16V
L1802
CIC21J501NE
C1821
4.7uF
10V
C1824
0.1uF
16V
C853
1uF
25V
IC1801
BA50BC0WFP-E2
1
CTL
2
VCC
3
GND
4
OUT
5
NC
IC806
BD9150MUV
1
PGND2_1
3
PVCC_2
7
SW1_1
9
EN1
10
FB1
11
ITH1
12
AGND
13
NC
14
AVCC
15
ITH2
16
FB2
17
EN2
18
SW2_1
19
SW2_2
20
PGND2_2
5
PGND1_1
8
SW1_2
6
PGND1_2
4
PVCC_3
2
PVCC_1
C891
0.47uF
25V
R1804
0
C809
10uF
16V
+12V
R885
12.4K
1%
C817
1000pF
OPT
C818
0.1uF 50V
L831
CIC21J501NE
C816
5600pF
50V
IC808
MP2305DS
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
C830
0.1uF
16V
+5V_GENERAL
R883
9.1K
R882 100K
R884
56K
1%
C810
0.47uF
25V
L832
22uH
+5V_USB_SIDE
L833
MLB-201209-0120P-N2
C833
0.1uF
16V
C834
10uF
10V
C828
22uF
16V
3225
C829
22uF
16V
3225
C835
330uF
25V
OPT
R1803
62K
1%
R1807
5.1K
1%
C804
1uF
10V
R803
4.7K
R1802
0
C1818
22uF
16V
3225
C1814
0.47uF
25V
R1806
2K
1/10W
C812
0.1uF
50V
Stand-by +3.3V
EAX60736302
7 9
2009.02.27
+3.3V /
50 mA
450 mA
FROM LIPS & POWER B/D
+5V_GENERAL/
S6 core 1.26 volt
R1
R2
PI_080719
PANEL Power
Vout=0.8*(1+R1/R2)
Replaced Part
R1
Close to IC
$0.07
C IN
465 mA @85% efficiency
C OUT
Close to IC
Placed on SMD-TOP
Placed on SMD-TOP
Replaced Part
1600 mA
MAX 3A
4.9A 0.0150OHM 34MHZ
R2
Vout=0.8*(1+R1/R2)
+1.8V_DDR
+5V_USB
Amp Power
Vout=0.8*(1+R1/R2)
R2
Close to IC
Placed on SMD-TOP
+6V_FE
$0.07
Close to IC
+5V_TUNER
4.9A 0.0150OHM 34MHZ
R1
+3.3VA_DTMB
+3.3V/+1.2V_DTMB
Tuner & Demod Power
FIN must be connected GND
R2
Vout=0.923*(1+R1/R2)
Placed on SMD-TOP
R1
LC91A(32/37/42/47LH40FD-CE)
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