LG 47LH90QR (CHASSIS:LP91C) 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
RGB_PC
PC_Audio
TV
(RF)
COMP1
HDMI1
HDMI2
RS232
TX
232C Driver
ST3232C
Tx/Rx :
±
15Vpp
PC_R/G/B/HS/VS
PC_Audio_L/R :
700mVrms
MNT_VOUT
:
1Vpp
SIDE_V :
1Vpp
SIDE_LIN/RIN :
500mVrms
DDR2 SDRAM
(512MB)
L_SPK_OUT
R_SPK_OUT
EEPROM
24C02
Comp1_L/R :
500mVrms
TUNER
AV1_VIN
:
1Vpp
AV1_LIN/RIN :
500mVrms
PWM
NTP3100L
MNT_OUT
MNT_LOUT/ROUT
:
500mVrms
AV2
(Side AV)
MAIN SCALER
LGE376xA
TXD /RXD :
5V Digital
COMP1_Y/Pb/Pr
:
1/0.7Vpp
COMP2_Y/Pb/Pr
:
1/0.7Vpp
IR
HDMI_DATA_1
HDMI_DATA_2
DDC_SCL2/SDA2
MEMC_RXE2
±
MEMC_RXE4
±
MEMC_RXC3±
MEMC_RXC±
MEMC_RXE1
±
MEMC_RXE0
±
TV_MAIN
MAIN_S I F
COMP1_Y/Pb/Pr
:
1/0.7Vpp
AV1_VIN
PC_Audio_L/R
COMP1_LIN/RIN
L_CH
R_CH
FRC LVDS connector
TV_MAIN
M_SCL/SDA
MAIN_SIF
AV1_LIN/RIN
MNT_L/R OUT
AV1
MNT_OUT
Comp2_L/R :
500mVrms
COMP2_Y/Pb/Pr
:
1/0.7Vpp
COMP2_LIN/RIN
COMP2
MEMC_RXO2
±
MEMC_RXO4
±
MEMC_RXO3
±
MEMC_RXOC±
MEMC_RXO1
±
MEMC_RXO0
±
PC_R/G/B/HS/VS
DDC_SCL1/SDA1
DSUB_SCL/SDA
MNT_VOUT
AV2_VIN
AV2_LIN/RIN
IIS_OUT
USB
USB_DP/DN
AUDIO
AMP
DDC_SCL3/SDA3
EEPROM
24C02
HDMI_DATA_3
TMDS
TMDS
TMDS
HDMI3
EEPROM
(256K)
Serial Flash
(8MByte)
EEPROM
24C02
FULL HD LVDS connector
FRC IC
LGE7329A
URSA_[C:D]
URSA_[A:B]
OPC_EN
DDR2 SDRAM
(2ea*256MB)
Rear Input
Side Input
LIPS
RL_ON/I-DIMMING
/DISP_EN
PANEL_STATUS
E-DIM
OPC_OUT1/2
EEPROM
for HDCP
(8K)
Serial Flash
EEPROM
24C02
EEP_SCL/SDA
EEP_SCL/SDA
M_SCL/SDA
LOCAL DIMMING
IC
LG5110
EEPROM
(32K)
LVDS_CH[1:2]
LVDS_CH[3:4]
LED Backlight
Control Driver Connector
VSINC/DIN/DCLK
- 19 -
300
200
200T
200N
A2
A10
900
120
510
580
121
121
500
560
310
800
802
801
530
550
805
521
400
803
804
540
LV
1
LV
2
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
EEPROM_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
NON_HOTEL_OPT
R124
30V
D114
PC_R
PC_AUD_L
220K
R100
75
R107
PEJ024-01
JK102
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
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
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
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
PPJ225-01
JK101
9J[GN]E-LUG
4A [GN]O-SPRING-S
3A [GN]CONTACT-S
9K [BL]E-LUG
8B [BL]C-LUG-S
9L [RD]E-LUG_1
8C [RD]C-LUG-S
9M [WH]E-LUG_1
8D [WH]C-LUG-S_1
9N [RD]E-LUG_2
4E [RD]O-SPRING-S_1
3E [RD]CONTACT-S_1
9P [YL]E-LUG
4F [YL]O-SPRING-S
3F [YL]CONTACT-S
9Q [WH]E-LUG_2
8G [WH]C-LUG-S_2
9R [RD]E-LUG_3
4H [RD]O-SPRING-S_2
3H [RD]CONTACT-S_2
5J
[GN]O-SPRING-L
6J
[GN]CONTACT-L
7K
[BL]C-LUG-L
7L
[RD]C-LUG_L
7M
[WH]C-LUG-L_1
5N
[RD]O-SPRING-L_1
6N
[RD]CONTACT-L_1
5P
[YL]O-SPRING-L
6P
[YL]CONTACT-L
7Q
[WH]C-LUG-L_2
5R
[RD]O-SPRING-L_2
6R
[RD]CONTACT-L_2
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
JP105
JP106
JP104
MDS61887701
M1
GAS
MDS61887701
M2
GAS
MDS61887701
M3
READY
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
60-ohm
L107
RGB_BEAD
60-ohm
L108
RGB_BEAD
60-ohm
L109
RGB_BEAD
0
L108-*1
RGB_R
0
L107-*1
RGB_R
0
L109-*1
RGB_R
1K
R134
1K
R135
6800pF
C104
6800pF
C10001
6630TGA004K
KCN-DS-1-0089
JK104
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
M24C02-RMN6T
IC100-*1
EEPROM_STM
3
E2
2
E1
4
VSS
1
E0
5
SDA
6
SCL
7
WC
8
VCC
EAX61087201
Mstar LCD LH90
Mstar LCD LH90
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[JACK PACK TYPE C
COMPONENT2
MNT_OUT
INPUT-ANALOG/PC
H6 LH90
1 1 2
2 0 0 9 / 0 3 / 0 4
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