Read LG 47SL90QD-CA (CHASSIS:LC91L) 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.
POWER
PANEL_POWER
+5V_ST
+3.3V_ST
+12V
PANEL_CTL
1:AK10
+3.3V_AVDD_MPLL
+3.3V_ST
Q805
2SC3052
2SC3052
E
B
C
Q804
2SC3052
2SC3052
E
B
C
L803
BLM18PG121SN1D
C803
0.1uF
16V
0.1uF
16V
C808
0.1uF
16V
0.1uF
16V
+3.3V
+1.8V_AMP
GND
+5V_ST
+1.8V_DDR
GND
L827
2.2uH
L826
2.2uH
C879
10uF
C878
10uF
C883
330pF
C882
330pF
R873
56000
5%
R874
75K
5%
POWER_ON/OFF1
1:AK11
Q806
RSR025P03
S
D
G
+5V_GENERAL
+12V
R815
6.8K
6.8K
OPT
Q802
2SC3052
2SC3052
E
B
C
+24V
ERROR_OUT
+3.3V_ST
+5V_ST
INV_CTL
PWM_DIM
A_DIM
+3.3V_AVDD
+3.3V
C813
0.1uF
50V
0.1uF
50V
+3.3V
L817
BLM18PG121SN1D
L810
BLM18PG121SN1D
OPC_OUT1
R843
1.8K
R871
8.2K
1%
R809
10.5K
1%
IC803
AP1117E18G-13
2
OUT
3
IN
1
ADJ/GND
IC801
AP1117E33G-13
2
OUT
3
IN
1
ADJ/GND
R826
10
1/10W
1%
0.1uF
C856
L813
3.6uH
NR8040T3R6N
+1.26V_VDDC
C836
10nF
50V
+3.3V
+5V_ST
+3.3V_ST
L807
CB3216UA121
L804
CB3216UA121
L806
CB3216UA121
L805
BLM18PG121SN1D
L812
BLM18PG121SN1D
IC805
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
R827
75K
75K
1/8W
1%
R825
22K
1%
R824
22K
1%
1%
C847
4.7uF
4.7uF
16V
C845
10uF
16V
10uF
16V
OPT
C826
100uF
16V
100uF
16V
C866
10uF
OPC_OUT2
+3.3V_MEMC
C846
100uF
100uF
16V
C855
0.1uF
16V
0.1uF
16V
C851
0.1uF
16V
0.1uF
16V
C854
100uF
100uF
16V
+1.8V_FRC_DDR
IC807
SC4215ISTRT
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
R838
12K
1/10W
1%
R
8
4
0
9
.
1
K
1
/
1
0
W
1
%
R861
1uF
10V
10V
C841
0.01uF
25V
C815
0.1uF
16V
0.1uF
16V
C820
0.1uF
0.1uF
16V
C865
0.1uF
0.1uF
16V
C814
0.1uF
16V
0.1uF
16V
C825
0.1uF
16V
0.1uF
16V
C811
0.1uF
16V
0.1uF
16V
C827
0.1uF
16V
0.1uF
16V
C877
0.1uF
16V
0.1uF
16V
C807
0.1uF
16V
OPT
C885
0.1uF
16V
C859
0.1uF
16V
0.1uF
16V
C802
0.1uF
16V
C842
0.1uF
16V
0.1uF
16V
R814
100
R872
10K
R821
10K
R822
10K
R823
10K
OPT
R842
10K
R836
10K
10K
R830
10K
1/16W
OPT
R831
10K
1/16W
R833
10K
10K
R832
10K
10K
OPT
R800
10K
C876
22uF
C880
22uF
C829
1uF
6.3V
C840
1uF
6.3V
22
R859
OPT
R837
22K
R839
22K
R856
4.7K
4.7K
R862
47
R806
0
+1.8V_DDR
+3.3V_ST
R802
10K
Q801
RT1P141C-T112
1
2
3
+5V_ST
Q800
2SC3052
E
B
C
R805
10K
R807
33K
33K
OPT
POWER_ON/OFF1
R810
0
OPT
R804
10K
R818
3.3K
3.3K
C832
68uF
68uF
35V
C821
68uF
68uF
35V
OPT
C896
100uF
16V
100uF
16V
+5V_TUNER
C895
0.1uF
50V
0.1uF
50V
C898
0.1uF
50V
0.1uF
50V
C897
4.7uF
10V
4.7uF
10V
C1811
0.1uF
50V
0.1uF
50V
IC1803
KIA78R033F
1
VIN
2
VC
3
VOUT
4
NC
5
GND1
6
GND2
C1813
0.1uF
50V
0.1uF
50V
C1806
100uF
16V
100uF
16V
C1812
100uF
16V
100uF
16V
C1808
10uF
10V
10uF
10V
C1805
0.1uF
16V
16V
IC1802
SC4215ISTRT
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
+1.2V_DTMB
C1814
0.1uF
16V
0.1uF
16V
C837
22uF
22uF
OPT
+3.3V
D801
100V
1N4148W_DIODES
C1821
22uF
10V
22uF
10V
3216
C1819
1uF
10V
R1803
10K
1/10W
L1802
CIC21J501NE
IC808
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
C1823
0.1uF
16V
0.1uF
16V
+12V
L1803
3.6uH
3.6uH
NR8040T3R6N
C1818
1000pF
OPT
C1822
0.1uF
16V
0.1uF
16V
R1807
10
1/10W
1%
C1816
22uF
22uF
C1817
OPT
R1802
10K
10K
1/8W
1%
L1805
BLM18PG121SN1D
+6V_TUNER
+6V_DTMB
L1804
BLM18PG121SN1D
+6V_DTMB
+6V_TUNER
C894
47uF
16V
47uF
16V
C1825
0.1uF
16V
0.1uF
16V
C1824
0.1uF
16V
0.1uF
16V
C853
1uF
25V
R1806
0
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
C892
0.1uF
16V
0.1uF
16V
OPT
L828
BLM18PG121SN1D
IC811
BA50BC0WFP-E2
1
CTL
2
VCC
3
GND
4
OUT
5
NC
C891
0.47uF
25V
C873
0.1uF
16V
0.1uF
16V
C870
0.1uF
0.1uF
16V
+12V
+5V_GENERAL
+5V_HDMI_SW
C872
0.1uF
16V
L830
22UH
22UH
R854
9.1K
R853
56K
1%
1%
L820
BLM18PG121SN1D
C869
22uF
16V
22uF
16V
+5V_USB_SIDE
C875
0.1uF
16V
0.1uF
16V
R855
12.4K
12.4K
1%
IC802
MP2305DS
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
C860
0.01uF
25V
0.01uF
25V
R852
100K
C868
0.47uF
25V
0.47uF
25V
L819
BLM18PG121SN1D
L831
22UH
22UH
+12V
C863
0.01uF
25V
0.01uF
25V
C862
0.47uF
25V
0.47uF
25V
IC812
MP2305DS
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
C881
0.1uF
16V
C857
22uF
16V
22uF
16V
R860
9.1K
R857
100K
R
8
5
8
3
3
K
1
%
+3.3V_MEMC
R863
12.4K
12.4K
1%
C864
0.1uF
0.1uF
16V
C889
10uF
6.3V
10uF
6.3V
IC813
BD9130EFJ-E2
3
ITH
2
VCC
4
GND
1
ADJ
5
PGND
6
SW
7
PVCC
8
EN
+1.26V_MEMC
C886
10uF
10uF
6.3V
R867
17.4K
17.4K
1%
R2
+3.3V_MEMC
R865
10K
10K
C893
22uF
16V
22uF
16V
C888
330pF
50V
R866
10K
1%
10K
1%
R1
R864
18K
L832
2.2uH
C890
0.1uF
16V
0.1uF
16V
C887
0.1uF
16V
AMP_VCC
L821
BLM18PG121SN1D
C812
0.01uF
50V
+24V
R1805
62K
1%
R1809
5.1K
1%
C830
1000pF
OPT
C833
1000pF
OPT
C1820
0.47uF
16V
R1804
0
1/10W
5%
R1808
2K
2K
1/10W
C838
22uF
22uF
10V
C843
22uF
22uF
10V
C849
22uF
10V
R801
22
R816
0
OPT
C871
5600pF
50V
C858
5600pF
50V
R851
4.7K
1uF
C818
10V
C867
22uF
16V
22uF
16V
C861
22uF
16V
22uF
16V
C831
22uF
16V
22uF
16V
3225
C834
22uF
16V
22uF
16V
3225
0
R841
P800
FM20020-24
19
NC
14
12V
9
5.2V
4
GND
18
20V
13
12V
8
5.2V
3
GND
17
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
25
L1812
BLM18PG121SN1D
+3.3V_CI
C2860
0.1uF
0.1uF
+3.3V_DEMOD
+3.3V_DEMOD
+3.3V_DVBC
L1813
BLM18PG121SN1D
C1810
22uF
16V
22uF
16V
C1809
0.1uF
0.1uF
C1815
47uF
10V
47uF
10V
R1801
4.7K
4.7K
R1800
9.1K
L818
MLB-201209-0120P-N2
C884
10uF
10V
10uF
10V
C874
100uF
16V
OPT
C800
100uF
16V
16V
C806
100uF
100uF
16V
C822
100uF
16V
16V
C824
100uF
100uF
16V
C823
100uF
16V
100uF
16V
OPT
C828
100uF
16V
100uF
16V
Stand-by +3.3V
C1130
8 17
POWER
+5V
$0.048
50 mA
450 mA
FROM LIPS & POWER B/D
BackLight On/Off
S6 core 1.26 volt
$0.048
R1
R2
Vout=0.8*(1+R1/R2)
Replaced Part
Replaced Part
R1
Close to IC
$0.07
C IN
465 mA @85% efficiency
Close to IC
Placed on SMD-TOP
Placed on SMD-TOP
Replaced Part
1600 mA
MAX 3A
$0.24
4.9A 0.0150OHM 34MHZ
R2
Vout=0.8*(1+R1/R2)
DEVELOPE
2009.7.2.
EAX61333001
400 mA
+1.8V_MEMC for DDR
$0.195
415 mA @85% efficiency
Vout=0.8*(1+R1/R2)
R1
R2
R1/R2 : 27K / 20K => Vout=1.88
R1/R2 : 12K / 9.1K => Vout=1.85
R1/R2 : 15K / 12K => Vout=1.80
R1/R2 : 18K / 13K => Vout=1.90
1.8V_AMP
+1.8V_DDR
+3.3V /
+5V_TUNER
3.3V_DEMOD/1.2V_DTMB
+5V_GENERAL
HDMI/USB
PANEL Power
Placed on SMD-TOP
R1
Close to IC
$0.07
4.9A 0.0150OHM 34MHZ
Close to IC
$0.24
DEVELOPE
R2
Vout=0.8*(1+R1/R2)
PI Result
+6V_FE
$0.28
R2
+12V
Vout=0.923*(1+R1/R2)
R1
Vout=0.923*(1+R1/R2)
$0.28
R1
R2
+1.26V_MEMC Core
Vout=0.8*(1+R1/R2)
C320 MUST BE PLACED NEAR PVCC PIN
$0.23
600mA
+3.3V_MEMC
Placed on SMD-TOP
Placed on SMD-TOP
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