LG 47SL90QR-LA / 47SL90QR-TA (CHASSIS:LP91L) Service Manual ▷ View online
- 17 -
No Raster On AV (Video, S-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 JK101, JK201
Pass
Re-soldering or
Change the defect part
Pass
Fail
Pass
Repeat [A], & [B] Process
Check the Input/Output
Of IC800
Fail
Re-soldering or
Change the defect part
Pass
Check The Input/Output
Of TU500
Pass
Re-soldering or
Change the defect part
Pass
Fail
Check the Input/Output
Of IC800
Fail
Re-soldering or
Change the defect part
Repeat [A], & [B] Process
No Sound
Check The Input Source
Check The Input/Output
Of IC600
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
- 18 -
BLOCK DIAGRAM
HDMI1
HDMI2
TX
IR
HDMI
DA
T
A
1
EEPROM
24C02
DDC_SCL1/SD
A
1
TMDS
Serial
Flash
Edge LED Backlight
HDMI3
__
HDMI_DA
T
A
_
2
DDC_SCL2/SD
A
2
USB
DDC_SCL3/SD
A
3
HDMI_DA
T
A
_
3
TMDS
TMDS
EEPROM
24C02
(8MBy
te
)
EEPROM
for HDCP
(8K)
EEP
SCL/SDA
EEP_SCL/SDA
EEPROM
24C02
OPC
E
N
Bluetooth
Circuit
BLT_DP/DN
DDR2 SDRA
M
(512MB)
EEPROM
(256K)
EEP
_
SCL/SDA
RGB_PC
PC_A
udi
o
PC_R/G/B/HS/V
S
PC_A
udi
o
_L/R :
700mVr
m
s
EEPROM
24C02
MAIN SCAL
ER
LGE376xA
PC_A
udi
o
_L/R
PC_R/G/B/HS/V
S
DSUB_SCL/SD
A
LVDS connector
URSA
_[
A
:B]
_
DDR2 SDRA
M
(2*256MB)
E-DIM
MEMC_RXE1
±±
MEMC_RXE0
±±
COMP1
Comp1_L/R :
500m
Vr
m
s
MNT_OUT
COMP1_Y/Pb/
Pr
:
1/0.7V
pp
COMP2_Y/Pb/
Pr
:
1/0.7V
pp
COMP1_Y/Pb/
Pr
:
1/0.7V
pp
COMP1_LIN/RIN
Comp2_L/R :
500m
Vr
m
s
COMP2_Y/Pb/
Pr
:
1/0.7V
pp
COMP2
L
IN/RIN
COMP2
FULL HD
FRC IC
L
G
E7329A
MEMC_RXE2
±±
MEMC_RXE4
±±
MEMC_RXC3
±±
MEMC_RXC
±±
MEMC_RXO2±
±
CO
MEMC_RXOC±
±
MEMC_RXO1±
±
MEMC_RXO0±
±
MNT_VOUT
:
1Vpp
A
V
2
_
L
IN
/RIN :
500m
Vr
m
s
R
SPK
OUT
A
V
1_VI
N
:
1Vpp
A
V1
_
L
IN
/RIN :
500m
Vr
m
s
MNT
L
OUT/ROUT
500
V
A
V
1_VI
N
FRC LVDS connector
A
V
1
_
L
IN
/RIN
AV
1
MNT_OUT
COMP2_
MNT_VOUT
A
V
2_VI
N
A
V
2
_
L
IN
/RIN
URSA
_[C~D]
Serial Flash
MEMC_RXO4±
±
MEM
C_RXO3±
±
M_SCL/SDA
TV
(RF)
232C
D
i
Tx/Rx
:
±15Vpp
L_SPK_O
UT
R_SPK
_
TUNER
NTP3100L
_
:
m
rms
TU_MA
IN
S I
F
L_CH
R_CH
TU_MA
IN
M_SCL/SDA
SIF
MNT_L/R OUT
IIS_OUT
A
UDIO
AM
P
PA
NEL_
STA
TUS
OPC
OUT
RS232
(Not fixed)
Dr
iv
e
r
ST3232C
Tx/Rx
:
TXD /RXD
:
5V Digital
RL_ON/I-DIMMING/DIS
P
_
EN
_
PSU
PWM
USB
DP/DN
_
- 19 -
300
510
310
120
122
200
801
LV
1
LV
2
540
530
803
802
550
810
910
A7
900
400
A2
A22
A10
A9
500
501
580
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
CAT24C02WI-GT3
IC100
CATALYST
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
DDC_WP
DSUB_SCL
DSUB_SCL
4.7K
R129
100
R119
4.7K
R128
100
R123
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.
4.7K
R154
READY
+5VST_MST
DSUB_SDA
0 . 0 1 u F
C113
100
R120
10K R133
0
R124
30V
D114
PC_R
PC_AUD_L
220K
R100
75
R107
75
R126
30V
D104
75
R127
75
R108
12K
R137
COMP2_R
MNT_LOUT
10K R132
220K
R121
CVBS_RIN
SD05
ZD201
10uF
16V
C106
SD05
ZD108
PC_B
100uF 16V
C103
ENKMC2837-T112
D127
A
AC
C
COMP1_PR
MNT_VOUT
MNT_ROUT
CDS3C30GTH
30V
D120
SD05
ZD109
CVBS_VIN
PC_G
SD05
ZD100
12K
R136
CVBS_LIN
30V
D101
ENKMC2837-T112
D128
A
AC
C
DSUB_SDA
COMP2_L
SD05
ZD106
30V
D115
75
R125
SD05
ZD200
30V
D203
220K
R122
COMP2_Y
10K
R113
SD05
ZD105
SD05
ZD102
75
R210
SD05
ZD103
75
R109
CDS3C30GTH
30V
D110
COMP1_Y
10uF
16V
C105
RT1C3904-T112
Q201
E
B
C
SD05
ZD104
COMP2_PB
30V
CDS3C30GTH
D100
RT1C3904-T112
Q200
E
B
C
MUTE_LINE
SD05
ZD107
CDS3C30GTH
30V
D107
SD05
ZD101
ENKMC2837-T112
D126
A
AC
C
PC_AUD_R
30V
D201
COMP1_L
12K
R118
COMP1_PB
10K
R114
12K
R117
30V
D204
220K
R104
+5V_MULTI
COMP1_R
COMP2_PR
DSUB_SCL
CDS3C30GTH
30V
D119
220K
R130
220K
R131
10K
R138
10K
R139
12K
R141
12K
R140
0.1uF
C117
0.1uF
C119
0.1uF
C118
4.7K
R111
4.7K
R112
10K
R215
10K
R217
12K
R219
12K
R218
220K
R211
220K
R214
75
R212
68pF
C100
68pF
C102
PC_VS
68
R110
PC_HS
68
R116
J P 1 0 5
J P 1 0 6
J P 1 0 4
10uF
16V
C10000
READY
0
R142
RT1C3904-T112
Q100
E
B
C
0
R143
RT1C3904-T112
Q101
E
B
C
75
R101
75
R103
75
R102
1K
R134
1K
R135
6800pF
C10001
6800pF
C104
M24C02-RMN6T
I C 1 0 0 - * 1
STM_replace
3
E2
2
E1
4
VSS
1
E0
5
SDA
6
SCL
7
WC
8
VCC
SPG09-DB-010
JK105
1
RED
2
GREEN
3
BLUE
4
GND_1
5
DDC_GND
6
RED_GND
7
GREEN_GND
8
BLUE_GND
9
NC
10
SYNC_GND
11
GND_2
12
DDC_DATA
13
H_SYNC
14
V_SYNC
15
DDC_CLOCK
16
SHILED
P E J 0 2 7 - 0 1
JK106
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
PPJ233-01
JK102
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
P P J 2 3 3 - 0 1
JK101
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
P P J 2 3 4 - 0 1
JK103
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
P P J 2 3 4 - 0 1
JK104
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
PC EDID
AV1
COMPONENT1
PC
**MULTI ITEM
1.24C02-SUB:0IMMRAL014D
2.ENKMC2837-SUB:0DS226009AA
[KDS226]
1.24C02-SUB:0IMMRAL014D
2.ENKMC2837-SUB:0DS226009AA
[KDS226]
POP NOISE
PC SOUND
POP NOISE
COMPONENT1/2, AV1, MNT_OUT
COMPONENT2
MNT_OUT
INPUT-ANALOG/PC
H6 SL90
1 1 2
2 0 0 9 / 0 6 / 0 2
EAX61337301
Mstar LED SL90
Mstar LED SL90
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