LG 37LC2DB (CHASSIS:LD61A) Service Manual ▷ View online
- 29 -
No Audio
Push the POWER
ON key
Replace the MSP
Power Error
Check the interfacing ciruit of
Analog Tuner, component
and PC audio accordingly
w.r.t the mode.
Check the
Condition of all
Connectors, wafers,
I2C In corresponding
Signal flow?
Check the
supply voltage 8V
across L403
Check audio
output at MSP across
R429-431.
Check the
PWM output of NSP
across R436-439
Check
3.3V supply across
L402 and 1.8V at
C448
Check 18V
supply at L421
Check the
Amplifier output level
At L423-426
Is the
Set ON?
Check the
RF SIF, Component
L/R and PC L/R signal across
R212, R171-170, R505-506,
respectively according to The
corresponding mode
On jack board
YES
Turn OFF the Mute
Is the
Mute ON?
Increase the Volume
Is Volume level
Of the set 0?
Correct them
Replace NSP
Power Error
Replace
TAS5122(amp)
There may be some
error in Audio
source.
TROUBLESHOOTING RF/Component/PC
BLOCK DIAGRAM(Main)
- 30 -
TDFB-G236P
DVB/PAL
8b
it(656),27M
Hz,I2S
STi5100
CI SLOT
TS IN
CI TS
74LCX244
Tuner TS
MUX
3 State Buffer
3state-control
SPDIF out
8bit(656),27M
Hz,I2S
DTV out VLR
FFC Wafe
r
FFC Wafer
FFC Wafer
Cortez
Hudson
Sub V/YC
Main V/YC
8Pin Reco
rd
PC_RGB
Comp YPbPr
Scart
RG
B
Sil9012
TMDS Rx
(HDCP)
HDMI
8bit
SPDIF OUT
24bit
24bit
SPDIF out DTV
SPDIF out MSP
24bit
24bit
DTV out VLR
LVD
S_31P
LCD : 1
0bit, AI,
PWM,
INV_BRI
24b
it
Uartcommu
nication
Uartcommu
nication
24bit
PDP modul
e
D/L
SDA,SCL
Wafer
to PDP modul
e
PDF Fan
Fan Control
- 31 -
BLOCK DIAGRAM(Jack)
CXA2069Q
AUDIO/VI
D
E
O
S
W
W
MSP4410K
Sound processor
NSP-2110A
Digital s
ound
pro
cessor
VLR
TV_out V
SCART RGB
VLR, YC
DTV V_out
MNT_VLR
PC_RGB
YPbPr
Co
mponent
Jack
Audio_LR
WIRE_IR_in
WIRE_IR_out
Audi
o out
CVBS
Audio
TV_out L
R
I2S
Digital AMP
I2S DTV/HDMI
Main V/YC
AV_LR
AV1
DTV out
AV2
RGB
audio
RGB i
n
IR
out
IR
In
AV3
Side AV
VLR
LR
VLR, YC
Sub V/YC
EPF LR
Audio_LR
TV_LR
MSP_SPDIF
8Pin Rec ord
8Pin Rec ord
FFC Wafer
FFC Wafer
FFC Wafer
- 32 -
EXPLODED VIEW(32LC2D)
010
020
050
120
140
030
160
040
150
110
080
090
100
070
060
060
130
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