LG 42LB4DS (CHASSIS:LA73A) Service Manual ▷ View online
- 41 -
EXT1/2
AT
/N
T
TUNER
LGDT
3303
X260
TP A
TP C
RGB
COMP 1/2
SIF
SIF IN 1
NTP
3000
SIF IN 2
I2S IN 1
I2S IN 2
I2S OUT 1
SPDIF
ØØ
CS8416
I2S
I2S
I2S
I2S
S/PDIF
SPDIF
L/R
L/R
L/R
L/R
ANT/Ca
ble
VSB TP
MSP4450K
MNT
OUT
I2S
I2S
I2
SI
3
I2
SO 1
SC 2
MCLK
MCLK
SPDIF OUT
Optical
Coaxial
HDMI 1/2/3
- 42 -
Check CS8416 (
IC501)
inputs
HD
MI
_S
PD
IF
(C
5005
)
1
2
3
4
5
Fol
lo
w
the pr
o
c
ed
ur
e of
“
COMMON
S
O
UND OUT
”
6
Ch
eck M
S
T3361 (
IC402
)
o
u
tp
u
t
HDMI_S
PDIF
(R4
0
9)
Ch
eck H
D
M
I Cab
le
Ch
eck X260 (
IC101
)
In
pu
ts
SCLK(R1
7
5),
LR
CLK(
R
176
),
D
A
T
A
(R
177
)
Ch
eck C
S
8416 (
IC
501
) ou
tp
u
ts
DA
TA
(#26
),
SC
LK
(#27
),
L
R
C
L
K
(#28
)
- 43 -
1. USB 1.1 Block Diagram For EMF
Ch
eck t
h
e de
vi
c
e
p
o
w
er
LE
D
Ch
eck t
h
e de
vi
c
e
C
a
b
le.
Is
i
t
U
S
B1.1
ca
ble
?
If
th
e de
vi
c
e
i
s
HDD, che
c
k a
ex
te
rn
al
po
w
er
a
d
ap
to
r.
Ch
eck V
B
U
S
_5V
Ch
eck t
h
e D
C
/D
C
C
o
n
ver
te
r
(I
C712
)
N
Y
Y
N
N
2. Check S
equence
Re
place
t
h
e
ca
ble
t
o
U
S
B1
.1
cab
le
or
Re
p
lace t
h
e
d
e
vice.
Y
N
Rep
la
c
e th
e
DC/
DC Con
ve
rter
(I
C712
)
•E
xception
-U
SB
power
coul
d be disa
bl
ed by
in
rushi
ng current
-I
n
th
is
case
, re
mo
ve the de
vice
and try to
rebo
ot the
TV (
A
C
pow
er
off/on
)
X260
USB_ link
(IC10
1)
DC/DC Conv
er
te
r
(IC7
12
)
J
A
C
K
Si
de B/D
USB1.1_OVRCUR
5V_
U
S
B
VBUS
_5
V
DP,DM
Cab
le
USB_PWR_DOWN
DEVICE
(HDD or Me
mor
y)
USB 1.
1
c
ab
le
- 44 -
EXPLODED VIEW - 42LB4DS
300
500
510
520
120
530
121
200
200T
200N
800
804
805
806
807
801
540
550
600
610
803
810
400
910
900
802
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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