LG 47LH30 (CHASSIS:LA92A) Service Manual ▷ View online
- 21 -
LG Electronics. Inc. All right reserved.
C
2009
8. All Source Audio
Make sure you
can t hear any audio.
OK
Check Mstar
AUDIO_MASTER_CLK
R603
NO
Replace Mstar(IC100)
or Main board
OK
Check Mstar I2S Output
R604, R605, R606
NO
Check signal line
Or replace IC100
OK
Check IC500 Power
24V, 3.3V, 1.8V.
NO
Check Regulaor
IC601.IC704
OK
Check Output Signal
P600 1,2,3,4 PIN
NO
Replace NTP(Audio AMP)
IC500
OK
Check Connector & P600
NO
Replace connector
if found to be damaged.
OK
Check speaker resistance
and connector damage.
NO
Replace speaker.
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LG Electronics. Inc. All right reserved.
C
2009
9. Digital TV Audio
Check Tuner 5V Power
TU1001 4Pin
NO
Check IC1002
Check IC1005(19",22")
OK
Check IF_P/N Signal
NO
Bad Tuner. Replace Tuner.
NO
Bad Tuner. Replace
Tuner.
OK
Check Check Demodulator Input
Clock(X1005)
NO
Replace X1005
OK
Check IC400(LGDT) Output
- AR1070, AR1071
NO
Replace IC400
OK
Check Output Signal
P600 1,2,3,4 PIN
NO
Replace NTP(Audio AMP)
IC500
OK
Check Connector & P600
NO
Replace connector
if found to be damaged.
OK
Check speaker resistance
and connector damage.
NO
Replace speaker.
10. Analog TV Audio
Check RF Cable
OK
Check Tuner 5V Power
TU1001 4Pin
NO
Check IC1002
Check IC1005(19",22")
NO
Bad Tuner. Replace
Tuner.
OK
Check SIF buffer signal.
NO
Check SIF Signal line.
OK
Follow procedure All source
audio trouble shooting guide
audio trouble shooting guide
NO
Replace Mstar(IC100)
or Main board
LG Electronics. Inc. All right reserved.
C
2009
- 23 -
BLOCK DIAGRAM
D-sub RGB
HDMI 1
Side A
V
CV
BS
, L
/R
DDR2 (5
12Mb
it
)
Qimonda
/ Hy
nix
NAND Flash
(256Mb)
Digita
l A
udio
(Optic
)
Digita
l AMP
NT
P3100L
RS-232C (Ctrl./SVC)
I2S
EEPROM
512Kb
RGB/
H/V
Half-NIM Tuner
DD
R_Data[
0:
15]
, D
Q
S,
DM
Ad
dr.[ ]
, ctrl. data
MAX3
232
Saturn5
Saturn5
(ATSC
(ATSC
US)
US)
MPEG2
L
inux
Scal
er
D
a
ta [0
7]
IF
+/-
SIF
TU_CVBS
R
e
set / IF
_AGC
SDA
/SCL_
5V
JT
A
G
C
L
K,T
D
I,T
D
O
,M
S,
R
S
T
Ad
dr[0
1], C
S
Au
d
io L/R
A
u
dio L/R (for
RGB)
HDMI 2
SP
DI
F
RX
/T
X
R
X
/TX
J
A
CK
P
A
CK
J
A
CK
P
A
CK
at RE
A
R
at RE
A
R
J
A
CK
P
A
CK
J
A
CK
P
A
CK
at SIDE
at SIDE
SCL
, SDA
_3
.3
V
T
R
B
u
ffer
VS
B
D
e
m
od.
LG
D
T
3305
X-t
al
Res
et
S
w
itch
Reset IC
12MHz
T
S
In[0
7]
TS_
cl
k, SOP, Va
l
EEPR
OM
Data[1
6:31]
DDR2 (5
12Mb
it
)
Qimonda
/ Hy
nix
AV
Compone
nt 1
Y
Pb
Pr, L/R
CV
BS
, Y/
C,
L
/R
SCL
, SDA
_3
.3
V
B
lu
e
tooth
Do
ngl
e
(Option)
DP
/D
M
LCD Module
(FHD,HD)
LV
D
S
EEPR
OM
EEPR
OM
HDMI 3
EEPR
OM
LG Electronics. Inc. All right reserved.
C
2009
- 24 -
804
803
802
801
805
520
400
200
300
120
540
530
550
910
900
A10
A2
LV1
510
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.
IMPORTANT SAFETY NOTICE
Click on the first or last page to see other 47LH30 (CHASSIS:LA92A) service manuals if exist.