LG 42LG300C (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
/
DP
5
V
_
HDM
I
PCM_ADD
PCM_DATA
TS_Parallel
TU
_
TS
_
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
1G
14C
(I
C
1300)
Bu
zze
r
(B
U
1300
)
PW
M
LE
D
C
lo
c
k
B/
D
P
IC
16F
819
(I
C
1303)
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
14925
(Q
1205)
5V
o
r 12V
O
U
T
(T
o
R
S
232
J
A
C
K
)
On
/
Of
f
J
L
C
1562
(I
C
1
03)
I2
C
Co
n
tro
l 4
b
it
RJ
4
5
(J
K
1300)
: H
o
te
l Fu
n
c
ti
o
n
- 26 -
510
300
200
200T
200N
120
122
500
901
900
801
804
803
530
802
550
830
805
806
522
821
540
400
121
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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