LG 32LH240H (CHASSIS:LA96A) Service Manual ▷ View online
- 21 -
8. All Source Audio
Check Mstar I2S Output
R604, R605, R606
Check IC500 Power
*24V, 3.3V, 1.8V.
OK
OK
Make sure you can’t hear any audio.
OK
Check Mstar AUDIO_MASTER_CLK
OK
Check Connector & P600
Check Regulator IC601, IC704
No
Check signal line. Or replace IC100.
No
Replace Mstar(IC100) or Main board.
No
Check Output Signal P600 1, 2, 3, 4 pin.
OK
Replace NTP(Audio AMP) IC500
No
Replace connector if found to be damaged.
No
OK
Check speaker resistance
and connector damage.
Replace speaker.
No
- 22 -
10. Analog TV Audio
Check RF Cable.
OK
Check SIF buffer signal.
Check SIF Signal line.
No
OK
Check Tuner 5V Power
TU1001 4pin
Check IC1002.
Check IC1005(19”, 22”).
No
Bad Tuner
Replace Tuner.
No
OK
Follow procedure All source audio
trouble shooting guide.
Replace Mstar(IC100)
or Main board.
No
9. Digital TV Audio
Check Tuner 5V Power
TU1001 4pin.
Check IC1002.
Check IC1005(19”, 22”)
No
OK
Check IF_P/N Signal.
Bad Tuner. Replace Tuner
Bad Tuner.
No
No
OK
Check Demodulator Input Clock(X1005).
Replace X1005.
No
OK
Check IC400(LGDT) Output
- AR1070, AR1071
Replace IC400.
No
OK
Check Output Signal
P600 1, 2, 3, 4 pin
Replace NTP3100L
(Audio AMP) IC500
No
OK
Check speaker resistance
and connector damage.
Replace speaker.
No
OK
Check Connector & P600
Replace connector
if found to be damaged.
No
- 23 -
BLOCK DIAGRAM
- 24 -
D-sub RGB
HDMI 1
Side A
V
CV
BS
, L
/R
DDR2 (5
12Mb
it)
Qimonda
/ Hy
nix
NAND Flash
(256Mb)
Digita
l AMP
NT
P3100A
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
Saturn6
Saturn6
(ATSC
(ATSC
US)
US)
MPEG2/4
L
inux
Scal
er
PIP : x
Headphone(opt)
D
ata [0 …
7]
IF
+/-
SIF
TU_CVBS
R
eset / IF
_AGC
…
SDA
/SCL_
5V
JT
A
G
C
LK,T
D
I,T
D
O
,M
S,
R
S
T
Ad
dr[0…1], C
S
…
Au
di
o L/R
A
u
dio L/R (for
RGB)
HDMI 2
Au
di
o L/R
Out
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
uffer
VS
B
D
em
od.
X-t
al
Res
et
S
w
itch
Reset IC
12MH
z
T
S
In[0…
7]
TS_
cl
k, SOP, Va
l
H/P Amp.
EEPR
OM
EEPR
OM
EEPR
OM
Data[1
6:31]
DDR2 (5
12Mb
it)
Qimonda
/ Hy
nix
AV
Component 1
Y
Pb
Pr, L/R
CV
BS
, L
/R
Speaker Ou
t(8
ohm)
USB2.0
SCL
, SDA
_3
.3
V
IO Expand
er
SCL
,
SDA_
3.
3V
GPIO
DP
/D
M
O.C. Protector
+5V
+5V
LCD Module
LV
D
S
MPEG2,
LINUX
AMP
PTC
MPI Control
RJP
RJP Cont
rol
IR OUT
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