Read LG 37LU25 (CHASSIS:LA85D) Service Manual online
COMP_Pr2
010:T15
COMP_Pr1
010:V7
COMP_Y1
010:V8
COMP_Pb2
010:T16
COMP_Pb1
010:V8
COMP_Y2
010:T17
0
R971
0.01uF
C916
MBW3216-501TF
L902
+5V_GENERAL
47uF
16V
C917
22
R992
COMP_SEL
COMP_Pb
001:B14
22
R993
22
R991
COMP_Y
001:B13
22 R990
COMP_Pr
001:B13
MC74HC4066ADR2G
IC901
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
680K
R909
680K
R910
COMP_L_IN_2
010:R13
+5V_GENERAL
COMP_L_IN
001:C8
COMP_L_IN_1
010:R6
+5V_GENERAL
680K
R913
680K
R912
4.7K
R908
COMP_SEL
+5V_GENERAL
0
R911
+5V_GENERAL
4.7K
R934
0
R933
+5V_GENERAL
COMP_SEL
+5V_GENERAL
680K
R941
680K
R940
COMP_R_IN_2
010:R12
COMP_R_IN
001:C7
680K
R935
COMP_R_IN_1
010:Q5
680K
R936
+5V_GENERAL
+3.3V_MULTI
1K
R939
AUD_SPDIF_OUT
001:N3
0.1uF
C905
27
R937
F i b e r O p t i c
JST1223-001
JK902
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
READY
ZD900
GND
TP918
100
R921
TP917
COMP_SEL
TP903
TP914
GND
100
R905
100
R906
TP902
NTP_RESET
10uF
16V
C903
10K
R920
+5V_GENERAL
100
R903
SIDEAV_SW
006:J6
TP919
100
R923
100
R924
HDMI_SW_EQ
008:Y13
100
R922
TP915
TP906
0.1uF
16V
C904
MSCL
22
R902
TP907
TP901
100
R907
COMP_SW2
010:Q19
TP904
TP905
TP900
MSDA
22
R900
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.
STMAV340
IC903
3
2B
2
1C
4
2C
1
1B
6
3C
5
3B
7
4B
8
4C
9
GND
10
4A
11
3A
12
2A
13
1A
14
S
15
OE_N
16
VCC
8pF
50V
READY
C914
JP912
0.1uF
50V
C911
10K
READY
R986
22
R972
SCL_HDMI3
+5V_GENERAL
DDC_CTL
22
R973
SDA_HDMI3
4.7K
R984
POWER_HDMI3
JP913
8pF
50V
READY
C913
100
R988
4.7K
R974
0
R964
TMDS3_RX0+
TMDS3_RX2-
HPDCTRL3
TMDS3_RX2+
TMDS3_RXC+
TMDS3_RX0-
SCL_HDMI3
0
R963
DDC_SDA3
+3.3V_VDDP_ST
47K
R9
85
SDA_HDMI3
TMDS3_RX1-
0.1uF
50V
C910
1K
R961
POWER_HDMI3
47K
R E
A D
Y
R989
TMDS3_RXC-
TMDS3_RX1+
DDC_SCL3
47K
R E
A D
Y
R987
100
R975
0
READY
R962
0
READY
R949
120K
R953
M M
B D
3 01
L T
1 G
D912
BSS83
Q901
S
B
D
G
+3.3V_VDDP_ST
0
R960
HDMI_CEC
HDMICEC
0
R955
0
R
982
0
R
979
0
R
977
0
R
976
0
R
981
0
R
978
0
R
980
0
R
983
MNT_OUT_MUTE
5V_MNT
VSB_CTRL
ENKMC2838-T112
D913
A1
C
A2
RT1N141C-T112-1
Q900
E
B
C
2SC3052
Q902
E
B
C
UBW2012-121F
L900
KJA-ET-0-0032
JK903
14
N
C
1
3
CEC
5
DATA1_SHIELD
20
JACK_GND
1
2
CLK-
1
1
CLK_SHIELD
2
DATA2_SHIELD
1
9
HPD
1
8
+5V_POWER
1
0
CLK+
4
DATA1+
1
DATA2+
1
7
DDC/CEC_GND
9
DATA0-
8
DATA0_SHIELD
3
DATA2-
1
6
SDA
7
DATA0+
6
DATA1-
1
5
SCL
M62320FP
IC900
3
SDA
2
SCL
4
D0
1
SO
6
D2
5
D1
7
D3
8
GND
9
D4
10
D5
11
D6
12
D7
13
VDD
14
CS2
15
CS1
16
CS0
CAT24C02WI-GT3
IC902
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
0.
1u
F
50V
C924
0.
1u
F
50V
C925
0.
1u
F
50V
C926
0.
1u
F
50V
C927
+5V_EDID
0
R901
TP1111
TP1114
0
C
918
0
C
919
0
C920
0
C921
0
C922
0
C923
SIGN1325
HIGH:COMP2
LOW :COMP1
SPDIF OUT
//NTP RESET : ACTIVE LOW
SIDE_HDMI
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