Read LG 42LG61YD (CHASSIS:LB81C) 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
C938
100uF
16V
C933
0.1uF
50V
C983
0.01uF 50V
C964
0.01uF 50V
+3.3V_AVDD_ADC
C981
0.01uF
50V
C987
0.1uF
50V
+3.3V_AVDD
+5V
C986
0.1uF
50V
C913
0.1uF
50V
+3.3V_AVDD_MEMPLL
+2.5V_DDR
C982
0.01uF 50V
C940
0.1uF
50V
C971
0.1uF
50V
C990
100uF
16V
C991
0.1uF
50V
PANEL_POWER
+3.3V_AVDD_LPLL
+5V_ST
+3.3V_VDDP_ST
+5V
006:AG26;008:D28;008:E28;009:M14;009:V11;009:Y8
+2.5V
Q905
SI4925BDY
3
S2
2
G1
4
G2
1
S1
5
D2_1
6
D2_2
7
D1_1
8
D1_2
+3.3V_IR
+12V
+3.3V_AVDD_SIF
C980
0.1uF
50V
C978
0.01uF 50V
C972
0.1uF
50V
+3.3V_AVDD_AU
C969
0.1uF
50V
C963
0.01uF 50V
C968
0.1uF
50V
+3.3V_AVDD_MPLL
PANEL_CTL
001:E29
C979
0.1uF
50V
C966
0.01uF 50V
C989
0.1uF
50V
+3.3V_AVDD_DVI
+5V_ST
+5V_ST
C939
0.1uF
50V
R903
10K
OPT
C930
100uF
16V
R902 10K
C967
0.1uF
50V
C911
0.01uF
50V
C988
0.1uF
50V
+3.3V_VDDP
C985
0.1uF
50V
+2.5V
IC904
AZ1085S-3.3TR/E1
1
ADJ/GND
2
OUTPUT
3
INPUT
C962
0.01uF 50V
C918
100uF
16V
RL_ON
001:B27;009:E16
C984
0.01uF 50V
C926
0.1uF
50V
+5V_GENERAL
+5V
C975
0.1uF
50V
C961
0.1uF
50V
C973
100uF
16V
C960
100uF
16V
+3.3V_AVDD
C965
0.01uF 50V
C970
0.1uF
50V
+3.3V_AVDD_OTG
+2.5V_VDD_DDR
C976
0.1uF
50V
C977
0.1uF
50V
C936
0.1uF
50V
+3.3V_TU
C935
100uF
16V
C941
100uF
16V
C943
0.1uF
50V
+5V
R927
OPT
+3.3V_CI
C951
0.1uF
50V
C952
0.1uF
50V
C946
0.1uF
50V
+1.8V_TU
+3.3V_VDDP_ST
+3.3V_VDDP_ST
C955
0.1uF
50V
C956
10uF
16V
3216
C949
0.01uF 50V
C954
0.1uF
50V
+1.25V_VDDC
C953
0.01uF 50V
+1.25V_AVDD_DVI
+1.25V_ST
+1.25V_ST
R925
0
3216
R924
0
3216
C948
0.1uF
50V
C974
10uF
16V
R923
0
+5V_GENERAL
C942
100uF
16V
R926
0
R907
22K
R908
22K
R904
10K
IC903
AZ1085S-ADJTR/E1
1
ADJ/GND
2
OUTPUT
3
INPUT
C931
100uF
16V
C934
0.1uF
50V
C929
0.1uF
50V
C937
330uF
16V
C932
0.1uF
50V
C928
100uF
16V
C957
0.1uF
50V
+3.3V_VDDP_ST
+3.3V_VDDP_ST
+3.3V_VDDP_ST
IC905
AZ1117D-3.3TRE1
1
ADJ/GND
2
OUTPUT
3
INPUT
IC909
AZ1117D-3.3TRE1
1
ADJ/GND
2
OUTPUT
3
INPUT
IC910
AZ1117D-2.5TRE1
1
ADJ/GND
2
OUTPUT
3
INPUT
IC907
AZ1117D-1.8TRE1
1
ADJ/GND
2
OUTPUT
3
INPUT
C958
100uF
16V
+1.8V_AMP
C945
0.1uF
50V
IC908
AZ1117D-1.8TRE1
1
ADJ/GND
2
OUTPUT
3
INPUT
C959
0.1uF
50V
L910
MBW3216-501TF
L906
MBW3216-501TF
L919
MBW3216-501TF
L908
MBW3216-501TF
L907
MBW3216-501TF
L914
MBW3216-501TF
L909
MBW3216-501TF
L905
MBW3216-501TF
OPT
L917
MBW3216-501TF
L915
MBW3216-501TF
L918
MBW3216-501TF
L911
MBW3216-501TF
L913
MBW3216-501TF
L916
MBW3216-501TF
L904
MBW3216-501TF
L912
MBW3216-501TF
Q902
2SC3052
E
B
C
Q904
2SC3052
E
B
C
Q903
2SC3052
E
B
C
R906
560
R905
10K
C916
10uF
OPT
C921
0.1uF
50V
OPT
C922
0.1uF
50V
C908
47uF
16V
C901
0.1uF
50V
C912
4.7uF
10V
OPT
C909
0.1uF
16V
IC902
KIA7805AF
2
C
3
O
1
I
+5V_TU
C910 0.1uF
16V
+12V
003:Z14;006:AB17;008:Z12;009:A8;009:H19
P902
SMAW200-24C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
L903
C905
0.1uF
16V
C919
100uF
16V
C923
0.1uF
16V
+12V
L901
CB4532UK121E
+5V_ST
C907
330uF
25V
C920
1uF
25V
C904
330uF
25V
+15V
L902
CB4532UK121E
R911
0
5V_MNT
001:H26
4.7K
R916
NON_52"Sharp
C903
0.1uF
16V
AC_DET
008:S16;001:H23
RL_ON
001:B27;009:B5
0
R912
OPT
INV_CTL
001:H25;009:K17
INV_CTL
001:H25;009:H14
R918
10K
OPT
+5V_GENERAL
R913
100
R914
10K
+5V_GENERAL
Q901
2SC3052
E
B
C
R917
10K
R915
10K
PWM_DIM
001:G12
0
R901
R909
47K
R910 47K
C917
1uF
35V
C993
0.1uF
50V
C992
0.01uF 50V
+3.3V_HDMI_ST
L921
MBW3216-501TF
R922
0
1/4W
5%
R921
0
1/4W
5%
R928
0
C927
10uF
16V
L920
MBW3216-501TF
C902
100uF
16V
1uF
C906
16V
R929
5.1K
A_DIM
001:B6;001:G12
C914
100uF
16V
JP9010
JP9011
JP9009
JP9008
JP9012
JP9002
JP9005
JP9004
JP9001
JP9006
R919
51
5%
R920
3.3K
1%
JP902
JP901
C925
0
52"Sharp
C924
100uF
16V
C915
100uF
16V
DC-DC CONVERTER
Stand-by +3.3V_+1.25V_MST_Core
TUNER_CI +3.3V_+1.8V_+1.5V
+5V_+12V
+2.5V_DDR
+3.3V_MST
R1
R2
V0 = 1.25(1+R2/R1)
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