Read LG 47LD950C (CHASSIS:LA92Y) 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
+5V_GENERAL
+5V_USB_SIDE
+12V
R847
56K
1%
1%
R852
9.1K
C839
0.47uF
25V
0.47uF
25V
R853
12.4K
12.4K
1%
IC808
MP2305DS
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
+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
+3.3V
+1.2V_TUNER
Q806
RSR025P03
S
D
G
+3.3V_CI
C810
100uF
16V
16V
C824
220uF
220uF
16V
+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
C801
100uF
16V
16V
L817
BLM18PG121SN1D
L814
BLM18PG121SN1D
L810
BLM18PG121SN1D
OPC_OUT1
R843
1.8K
R871
8.2K
1%
R809
10.5K
1%
L819
22UH
22UH
C860
5.6nF
50V
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
+3.3V
+5V_ST
+3.3V_ST
L821
BLM18PG121SN1D
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
16V
OPT
C826
100uF
16V
16V
IC804
AZ1117H-1.2TRE1
1
ADJ/GND
2
OUT
3
IN
C858
22uF
16V
22uF
16V
C866
10uF
C891
0.47uF
25V
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
L818
BLM18PG121SN1D
+5V_HDMI_SW
0
R841
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
C805
0.1uF
16V
0.1uF
16V
C812
0.1uF
16V
0.1uF
16V
C850
0.1uF
16V
C864
0.1uF
16V
0.1uF
16V
C825
0.1uF
16V
0.1uF
16V
C811
0.1uF
16V
0.1uF
16V
C852
0.1uF
16V
0.1uF
16V
C827
0.1uF
16V
0.1uF
16V
C884
0.1uF
16V
0.1uF
16V
C868
0.1uF
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
R848
100K
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
C890
0.1uF
16V
0.1uF
16V
+5V_GENERAL
IC809
AP1117E33G-13
2
OUT
3
IN
1
ADJ/GND
+3.3V_TUNER
C894
0.1uF
16V
0.1uF
16V
R806
0
+1.8V_DDR
+3.3V_ST
R802
10K
Q801
RT1P141C-T112
1
2
3
+5V_ST
Q800
2SC3052
E
B
C
R807
33K
OPT
POWER_ON/OFF1
R810
0
OPT
R804
10K
OPT
R818
3.3K
3.3K
C832
68uF
35V
C821
68uF
35V
OPT
C892
100uF
16V
16V
C893
100uF
100uF
16V
C837
22uF
22uF
OPT
C838
22uF
22uF
C843
22uF
22uF
10V
C849
22uF
10V
OPT
C853
1uF
25V
C809
470uF
16V
R811
1
R801
1
P800
FW20020-24S
19
.
14
.
9
.
4
.
18
.
13
.
8
.
3
.
17
.
12
.
7
.
2
.
16
.
11
.
6
.
1
.
20
12
15
.
10
.
5
.
21 11
22
14
23
.
24
13
R850
12.4K
12.4K
1%
L815
BLM18PG121SN1D
C862
5.6nF
50V
R803
100K
C867
22uF
16V
22uF
16V
R813
9.1K
C823
0.1uF
0.1uF
16V
IC810
MP2305DS
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
C816
0.47uF
25V
0.47uF
25V
L808
22UH
22UH
+3.3V_MEMC
+12V
C869
0.1uF
16V
C819
0.1uF
16V
R844
10K
10K
IC802
BD9130EFJ-E2
3
ITH
2
VCC
4
GND
1
ADJ
5
PGND
6
SW
7
PVCC
8
EN
R834
10K
1%
10K
1%
R1
L809
2.2uH
R835
17.4K
17.4K
1%
R2
C831
0.1uF
16V
0.1uF
16V
C828
330pF
50V
C817
10uF
10uF
6.3V
C833
22uF
16V
16V
R829
18K
+1.26V_MEMC
C830
10uF
6.3V
10uF
6.3V
+3.3V_MEMC
R
8
4
9
3
3
K
1
%
0.1uF
C834
16V
OPT
L828
BLM18PG121SN1D
L829
BLM18PG121SN1D
37"42"47"_OPC2
C895
0.1uF
16V
0.1uF
16V
OPT
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
1uF
C818
6.3V
R851
4.7K
R805
4.7K
4.7K
R862
0
0
C800
100uF
16V
16V
C822
100uF
16V
16V
C806
100uF
16V
C836
0.1uF
50V
0.1uF
50V
C835
22uF
25V
22uF
25V
C804
22uF
25V
22uF
25V
C848
0.01uF
25V
0.01uF
25V
C863
0.01uF
25V
0.01uF
25V
Stand-by +3.3V
C1130
8 12
POWER
+5V
$0.048
50 mA
180 mA
$0.05
450 mA
FROM LIPS & POWER B/D
BackLight On/Off
+12V
S6 core 1.26 volt
$0.28
$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
R1
R2
Vout=0.8*(1+R1/R2)
Vout=0.923*(1+R1/R2)
DEVELOPE
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
Replaced Part
$0.048
+12V
$0.28
Vout=0.923*(1+R1/R2)
R1
R2
5V SEPERATE FRC WITH TUNER 5V
+1.26V Core for FRC
C320 MUST BE PLACED NEAR PVCC PIN
Vout=0.8*(1+R1/R2)
$0.23
600mA
EAX57644502
2009.05.15
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