Read LG 42LG61YD (CHASSIS:LB81C) Service Manual online
Fiber Optic
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.
AMP
COMP1_R_IN
R805
680K
R816
680K
+5V_GENERAL
R818 10K
+5V_GENERAL
C803
2.2uF
50V
COMP_L
C812
2.2uF 50V
COMP2_L_IN
+5V_GENERAL
R812
680K
COMP1_L_IN
IC801
MC74HC4066ADR2G
3
YB
2
YA
4
XB
1
XA
6
CONTROL_C
5
CONTROL_B
7
GND
8
XC
9
YC
10
YD
11
XD
12
CONTROL_D
13
CONTROL_A
14
VCC
+5V_GENERAL
COMP2_R_IN
+5V_GENERAL
C804
2.2uF
50V
R813
680K
R815
680K
R806
680K
COMP_SEL
R817
0
COMP_R
C813
2.2uF 50V
+5V_GENERAL
R807
680K
R814
680K
R803
10K
Q800
2SC3052
E
B
C
+5V_GENERAL
R804
0
R802
10K
COMP_SEL
0.1uF
C843
50V
C823
22000pF 50V
R808
100
SDA_EYEQ/AMP
001:B25;007:AD7;010:O14
C805 0.1uF
50V
R830
5.6
L804
DA-8580
EAP38319001
2S
1S
1F
2F
R831
5.6
AUDIO_MASTER_CLK
R829
5.6
C820 22000pF 50V
0.1uF
C827
50V
+1.8V_AMP
+3.3V_CI
C818 1uF 10V
+1.8V_AMP
R836
4.7K
L802
MLB-201209-0120P-N2
D804
100V
1N4148W
R828
5.6
AMP_RST
C835 1000pF 50V
0.1uF
C842
50V
R840
3.3
R823
0
OPT
R827
5.6
OPT
0.1uF
C822
50V
+5V
C832 1000pF 50V
OPT
0.1uF
C829
50V
+5V
D801
100V
1N4148W
0.01uF
C817
50V
R811
100
OPT
R825
5.6
OPT
SCL_EYEQ/AMP
C821 1uF 16V
+15V_AMP
MS_LRCK
SPK_R+
C838 0.47uF 50V
0.1uF
C808
50V
0.01uF
C854
50V
R809
3.3K
0.01uF
C852
50V
C834 1000pF 50V
MS_LRCH
L803
MBW3216-501TF
R834
4.7K
C806 10uF 6.3V
+15V_AMP
C819
330uF
25V
SPDIF_OUT
0.1uF
C828
50V
R801
1K
C839 0.47uF 50V
JK801
JST1223-001
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
C816
22000pF
50V
SPK_L+
MUTE
001:H25
+15V_AMP
C837 1000pF 50V
ZD801
OPT
0.1uF
C811
50V
SPK_L-
R819 3.3
R810
100
OPT
R835
4.7K
D803
100V
1N4148W
R838
3.3
+1.8V_AMP
P801
SMAW250-04
1
2
3
4
R822
0
R841
3.3
+1.8V_AMP
R837
4.7K
0.01uF
C851
50V
L801
C810 1000pF 50V
L805
DA-8580
EAP38319001
2S
1S
1F
2F
+15V_AMP
SPK_R-
0.1uF
C845
50V
C836 1000pF 50V
+15V_AMP
R820
120K
OPT
AC_DET
001:H23;009:E15
D802
100V
1N4148W
MS_SCK
+15V
C807
100pF
50V
0.1uF
C844
50V
0.1uF
C815
50V
0.01uF
C853
50V
C826
22000pF
50V
C833 1000pF 50V
OPT
R826
5.6
OPT
C802 0.1uF
50V
R839
3.3
+15V_AMP
C809 1000pF
50V
+15V_AMP
+15V_AMP
R824
5.6
OPT
C801 10uF 6.3V
C831
1000pF
50V
OPT
C830
1000pF
50V
OPT
C825
1uF
16V
C814
1uF
1
0V
0.1uF
C824
50V
SPK_R-
SPK_R+
SPK_L-
SPK_L+
R859
0
OPT
R860
0
IC802
NTP3000A
EAN41584001
1
BST1A
2
VDR1A
3
/RESET
4
AD
5
VSS_IO
6
CLK_I
7
CLK_O
8
VDD_IO
9
DGNDPLL
10
AGNDPLL
11
LFM
12
AVDDPLL
13
DVDDPLL
14
NC_1
15
DVSS
16
DVDD
17
SDATA
18
WCK
19
BCK
20
SDA
21
SCL
22
PWM_3B/PWM_HP2
23
PWM_3A/PWM_HP1
24
PROTECT
25
FAULT
26
VDR2B
27
BST2B
28
PGND2B_1
29
PGND2B_2
30
OUT2B_1
31
OUT2B_2
32
PVDD2B_1
33
PVDD2B_2
34
PVDD2A_1
35
PVDD2A_2
36
OUT2A_1
37
OUT2A_2
38
PGND2A_1
39
PGND2A_2
40
BST2A
41
VDR2A
42
NC_2
43
VDR1B
44
BST1B
45
PGND1B_1
46
PGND1B_2
47
OUT1B_1
48
OUT1B_2
49
PVDD1B_1
50
PVDD1B_2
51
PVDD1A_1
52
PVDD1A_2
53
OUT1A_1
54
OUT1A_2
55
PGND1A_1
56
PGND1A_2
C846
0.1uF
YAMAHA
GND
P_+16V_AMP_IN
R857
0
YAMAHA
C848
0.1uF
YAMAHA
C850
1uF
25V
YAMAHA
R854
100
OPT
R855
0
YAMAHA
MUTE_YAMAHA
GND
+3.3V_CI
C856
1uF
25V
YAMAHA
P_+16V_AMP_IN
GND
C840
1uF
25V
YAMAHA
R853
0
YAMAHA
R851
200K
YAMAHA
R850
68K
YAMAHA
R856
0
YAMAHA
C855
1uF
25V
YAMAHA
C841
1uF
25V
YAMAHA
GND
R844 120K
1%
YAMAHA
C847
1uF
YAMAHA
P_+16V_AMP_IN
P_+16V_AMP_IN
SPK_N
R845 100K
1%
YAMAHA
L_SOUND_N
P_+16V_AMP_IN
P_+16V_AMP_IN
R_SOUND_P
P_+16V_AMP_IN
GND
L810
YAMAHA
R_SOUND_N
C849
1uF
25V
YAMAHA
+15V
GND
L_SOUND_P
SPK_P
IC803
YDA148-EZ
YAMAHA
1
PVDDREG
3
INLP
7
INRP
9
PLIMIT
10
PVDDPR
11
OUTPR_1
12
OUTPR_2
13
PVSSR
14
OUTMR_1
15
OUTMR_2
16
PVDDMR
17
SLEEPN
18
PROTN
19
MUTEN
20
CKOUT
21
CKIN
22
NCDRC0
23
NCDRC1
24
GAIN0
25
GAIN1
26
PVDDML
27
OUTML_1
28
OUTML_2
29
PVSSL
30
OUTPL_1
31
OUTPL_2
32
PVDDPL
5
VREF
8
AVSS
6
INRM
4
INLM
2
AVDD
R842
68K
1%
YAMAHA
R843
1K
1%
YAMAHA
R832
10K
YAMAHA
R833
10K
YAMAHA
R852
100
OPT
L_SOUND_N
L_SOUND_P
R_SOUND_P
R_SOUND_N
R849
0
YAMAHA
R846
0
YAMAHA
R847
0
YAMAHA
R848
0
YAMAHA
YAMAHA_GAIN1
001:H26
YAMAHA_GAIN0
001:H27
+12V
L811
OPT
JP8005
JP8007
JP8006
JP8008
JP8003
JP8004
JP8001
JP8002
C1211
10uF
6.3V
OPT
R821
1.1K
GND
R8611K
YAMAHA
PS421/NTP_SDA
001:H24;007:AD5
PS421/NTP_SCL
R862
100
R863
100
L806
120-ohm
L808
120-ohm
L809
120-ohm
L807
120-ohm
AUDIO SWITCH
SPEAKER_R
SPEAKER_L
SPDIF OPTIC JACK
L
L
H,H
SPK L
L,H
H
46dB
Output
Gain
GAIN[1:0]
34dB
HP
28dB
H,L
Speaker
AMP
L,L
SPK R
40dB
Mute
X
MUTEN
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