LG 37LG300C (CHASSIS:LD85A) Service Manual ▷ View online
- 25 -
BLOCK DIAGRAM
LV
D
S
L
G
E
7
363C
(I
C
1
0
0
)
STM
A
V
3
4
0
(I
C
7
00)
N
T
P
300
0A
(I
C
1000
)
SP
(
R
)
SP
(
L
)
5
V
_A
N
T
_M
N
T
CI
S
lo
t
(P
8
0
0
)
EE
PR
O
M
KI
A
7
4
2
7
(I
C
104)
I2
C_
D_
T
U
/
I
2
C_
A
_
T
U
K
EY1
/
2
TV Tuner
BO
O
S
T
E
R
SI
F
TV
_
C
V
B
S
DDR
M
e
m
o
ry
25
6M
b
(
IC
300)
SC
1
_
R
/
G
/
B
DS
U
B
_
R
/
G
/
B
R/
G
/B
P
C
_L
/
R
_I
N
COM
P
_
Y
/
P
b
/
P
r
COM
P
_
L
/
R
_
IN
D
S
U
B
_H
/
V
_S
Y
N
C
MA
X
3
2
3
2
(I
C
702)
D
DC/
U
A
R
T-T
x
/
R
x
HD
M
I
Sw
it
c
h
(I
C
902
)
EE
PR
O
M
HDM
I_
I2
C
DD
C_
I2
C*
2
CE
C
TM
D
S
*
2
US
B
_
DM
/
D
P
5
V
_
HDM
I
PCM_ADD
PCM_DATA
TS_Parallel
TU
_
T
S
_
D
A
TA
KI
C
7
SZ
3
2
F
U
(I
C
8
0
2
)
PCM_CD_ON
CI
_
CD_
1
/
2
IIS
MUT
E
LE
D
_
G/
R
&
IR
DT
V
/
T
V
_
V
OU
T
SC
1
_
L
/
R
_
IN
SC
1
_
C
V
B
S
_
IN
LC
D
H
D
Pa
n
e
l
RE
S
E
T
I2
C
I/
O
E
x
p
a
n
d
e
r
(I
C
103)
I2
C
_
A
_
T
U
TS_Serial
74L
V
C
541
A
(I
C
800)
DD
R
M
e
m
o
ry
32M
B*
2
(
IC
300,
301)
EEP
RO
M
Sid e_Y/ C/ V/ L/ R
DD
R
M
e
m
o
ry
25
6M
b
(
IC
3
00)
Fl
a
s
h
M
e
m
o
ry
8M
B*
2
(
IC
106,
1
07)
IR
&
C
o
n
tr
o
l
B/
D
24
C
512
(I
C
105)
D
T
V
/
T
V
_L
/
R
_O
U
T
HP
D*
2
74L
X
1
G
14C
(I
C
1
300)
Bu
zze
r
(B
U
1300
)
PW
M
LE
D
C
lo
c
k
B/
D
P
IC
16F
819
(I
C
1
303)
I2
C
T
P
A
6011A
(I
C
1
001)
EXT
_
SP
K
(J
K
600
)
IR
_
O
UT
(T
o
R
S
232
J
A
C
K
)
S
1
4925
(Q
1205)
5V
o
r 12V
O
U
T
(T
o
R
S
232
J
A
C
K
)
On
/
O
ff
J
L
C
1
562
(I
C
1
03)
I2
C
Co
n
tro
l 4
b
it
RJ
4
5
(J
K
1
300)
: H
o
te
l Fu
n
c
ti
o
n
- 26 -
510
300
200
120
122
500
901
900
800
805
802
530
801
550
806
803
804
521
821
540
400
822
121
200T
200N
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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