LG 32LV3100 (CHASSIS:LP91U) Service Manual ▷ View online
- 16 -
No Sound
Check The Input Sourse
Check The Input/
Output of IC501
Re-soldering or
Change the defect part
Fail
Pass
Pass
Check The Speaker
Change Speaker
Fail
Check The Speaker Wire
Pass
Change The Source Input
Fail
No Raster On AV Video Signal
No Signal On TV(RF) Signal
Check Input source
Cable And Jack
Pass
Check Input source
Cable and Jack
Pass
Check The Input/
Output of JK103
Re-soldering or
Change the defect part
Pass
Fail
Pass
Repeat [A]/[A-1], & [B] Process
Pass
Check the Input/
Output of IC800
Fail
Re-soldering or
Change the defect part
Pass
Check The Input/
Output of TU600
Of TU500
Re-soldering or
Change the defect part
Pass
Fail
Pass
Check the Input/
Output of IC800
Fail
Re-soldering or
Change the defect part
Repeat [A]/[A-1], & [B] Process
- 17 -
BLOCK DIAGRAM
EEP
ROM
R1EX
24
00
2
RGB-PC
(JK20
2)
Tuner
(TU600)
Compon
ent
(JK10
1)
A
V
_L
IN
/R
IN
:
500mVrms
SPK_L
SPK_R
AV
_
V
IN
:
1Vpp
N
T
P7100
COM
P_Y/Pb/Pr
HD
M
I_DA
T
A
0
TU_
M
A
IN
AV
_
V
IN
C
O
MP_
L
IN
/R
IN
L_CH
R_CH
A
V
_L
IN
/R
IN
PC-SOU
N
D
(JK20
3)
I2S_
MC
L
K
I2S_
S
D
O
I2S_W
S
I2S_
S
C
K
TMDS
EE
PRO
M
(A
T24
C256
C
)
Se
rial
Flas
h
(MX2
5L
6
4
)
EE
PRO
M
HDCP
(2
4WC0
8)
EEP_SCL/
SDA
EEP_SCL/
SDA
TXCE
2
––
TXCE
3
––
TXCL
KE
––
TXCE
1
––
TXCE
0
––
TXCO1
––
TXCO3
––
TXCO2
––
TXCO0
––
TXCL
KO
––
M_SCL/SD
A
Main scaler
Matrix
(L
G
E
4767A
)
(I
C
800
)
IC30
2
T
U
600
IC
802
IC
803
IC
801
IC
501
M_
S
C
L
/S
D
A
SIDE
REAR
HD
M
I3
(JK30
3)
US
B
(JK20
4)
R
S-232
C
(JK20
0)
HD
M
I1
(JK30
1)
HD
M
I2
(JK30
2)
EEP
ROM
R1EX
24
00
2
IC30
1
EEP
ROM
R1EX
24
00
2
IC30
0
DDC
_S
C
L
/SD
A
1
DDC
_S
C
L
/SD
A
2
DDC
_S
C
L
/SD
A
3
Contr
o
ll
e
r
M
A
X3232
C
D
R
IC20
0
RX
D
/TXD
EEP
ROM
R1EX
24
00
2
IC20
1
DS
UB
_SCL/S
D
A
S
P
I_
C
Z
/D
O
SPI
_
CLK/DI
HD
M
I_DA
T
A
1
HD
M
I_DA
T
A
2
U
S
B DN/DP
P
C
_
R
/G/B
PC_VS
/H
S
TXD/
R
X
D
PC_A
UD_L/
R
TXCO4
––
TXCE
4
––
P402
P405
HD LV
DS c
onne
ctor
DDR2 SDR
A
M
(512
M
B
y
te
)
IC
900
DD
R2_C
K
E
DD
R2_WEZ
DD
R2_DQS0 –
–
DD
R2_M
CLK
DD
R2_BA
0/
1
DD
R2_DQS1
––
DD
R2_ODT
DD
R2_DQM
0/
1
51
P FHD L
VDS
co
nne
ctor
P401
P404
30
P FHD L
VDS
co
nne
ctor
A
udi
o
out_L/
R
COM
PON
ENT_L/R
:
500mVrms
CO
M
P
O
N
ENT_Y
/Pb/
P
r
:
1/0.7Vpp
A
udi
o
out_L/
R
:
5
00m
Vrms
AV
(JK10
3)
A
udi
o
out
(JK10
2)
OP A
m
p
A
S324M
T
R
IC
50
2
M
N
T_L/R_A
M
P
A
udi
o
A
m
p
TPA
3124
IC21
00
Hotel opt
ion
f
o
r China
M
A
IN
_SIF
LED d
ro
v
e
r
(M
A
X
16814
)
IC
100
P7701
5P conn
ec
tor
PW
M
_
DIM
WLED
_ENA
BLE
(I
NV_
CTL)
12P
/15P
co
nn
e
c
tor
P400
(15P
)
P403
(12P
)
SUB_S
CL/SD
A
, L
E
D_R
IR
, K
E
Y
1
/2
Only
for 22
TN module
- 18 -
LV
1
400
540
530
521
710
700
900
910
810
A2
A21
A5
A10
120
300
200
500
510
511
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
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
10/12/29
INPUT1
ZD103
SD05
COMP_PB_IN
R118
12K
R121
75
R104
220K
220K
COMP_PR_IN
D100
30V
R107
75
COMP_L_IN
ZD101
SD05
ZD102
SD05
R113
10K
JP108
ZD100
SD05
R100
220K
220K
R108
75
COMP_R_IN
D101
30V
R109
75
COMP_Y_IN
R114
10K
R117
12K
JK101
PPJ234-01
5A
[GN]O-SPRING
6A
[GN]E-LUG
4A
[GN]CONTACT
7B
[BL]E-LUG-S
5B
[BL]O-SPRING
7C
[RD]E-LUG-S
5C
[RD]O-SPRING_1
5D
[WH]O-SPRING
4E
[RD]CONTACT
5E
[RD]O-SPRING_2
6E
[RD]E-LUG
JK103
PPJ233-01
4A
[YL]O-SPRING
5A
[YL]E-LUG
3A
[YL]CONTACT
4B
[WH]C-LUG
5C
[RD]E-LUG
4C
[RD]O-SPRING
3C
[RD]CONTACT
ZD104
SD05
ZD105
SD05
CVBS_V_IN
R110
75
R119
12K
D104
30V
R115
10K
R111
220K
220K
CVBS_L_IN
D105
30V
30V
R112
220K
220K
R120
12K
12K
CVBS_R_IN
R116
10K
MUTE_AUDIO_OUT
ZD107
30V
C102
10uF16V
AUDIO_OUT
C103
5600pF
50V
5600pF
50V
ZD106
30V
C104
5600pF
50V
5600pF
50V
R123
1K
AUDIO_OUT
R124
1K
AUDIO_OUT
R122
0
MUTE_AUDIO_OUT
R125
0
MNT_L_OUT
C101
10uF 16V
AUDIO_OUT
MNT_R_OUT
EXT_SPK_L
R102
0
0
EXT_SPK
EXT_SPK_R
R103
0
0
EXT_SPK
JK102
PPJ241-02
3
[WH]L_OUT
5
[WH]GND
4
[RD]R_OUT
6
FIX_TER
Q104
MMBT3904(NXP)
E
B
C
Q106
MMBT3904(NXP)
E
B
C
Q103
MMBT3904(NXP)
E
B
C
Q105
MMBT3904(NXP)
E
B
C
1 12
COMPONENT / AV IN / AUDIO OUT
LP91U
EAX64049202
REAR AV
COMPONENT
AUDIO_OUT
POP NOISE
POP NOISE
’11 ATV(H6R)
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