LG 47LK950 (CHASSIS:LJ01U) Service Manual ▷ View online
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.
3D_SYNC_RF
P3401
12507WR-12L
3D_SG
1
3.3V
2
GND
3
RX
4
TX
5
RESET
6
DC
7
DD
8
GND
9
GPIO_0
10
GPIO_1
11
GPIO_2
12
3D_SYNC
13
.
R3406
22
22
3D_SG
M_REMOTE_RX
R3405
22
22
3D_SG
R3402
100
100
3D_SG
R3408
100
100
3D_SG
L3401
120-ohm
3D_SG
R3411
2.7K
3D_SG
+3.3V_Normal
R3410
2.7K
3D_SG
R3412
2.7K
3D_SG
DD_MREMOTE
M_RFModule_RESET
R3403
22
22
3D_SG
+3.3V_Normal
M_REMOTE_TX
R3401
100
100
3D_SG
3D_GPIO_2
3D_GPIO_1
R3404
22
22
3D_SG
R3409
100
100
3D_SG
DC_MREMOTE
R3407
100
100
3D_SG
1
1
1
0
0
1
RESERVED
GPOIO_0
0
ALL 3D-SG OPTION
1
RESERVED
1
GPOIO_2
3D Off
50Hz
FREQ.
0
1
59.94Hz
1
0
1
1
0
GPOIO_1
0
0
0
0
0
60Hz
TI solution RF-3D OPTION
1
RESERVED
3D_GPIO_0
0
1
RESERVED
1. Power-up boot check
Check stand-by Voltage.
P403 9~12pin : +3.5V_ST
Check Power connector
Main B/D 3.5V Line
Short Check
Check X1002 clock
32 KHz
Replace X1002
Check P403 PWR_ON.
1pin : 3.3V
Replace Micom(IC1002) or Main board
Check Multi Voltage
P403 2pin:24V or 24V ,17pin:12V
Replace Power Board
Check Inverter Control & Error Out
P403 18 pin : High
P403 24 pin : low
P403 24 pin : low
Check Power Board or Module
Check IC402/3/5/7 Output Voltage
IC402 : 2.5V
IC403 : 1.26V
IC405 : 3.3V
IC407 : 1.5V
IC407 : 1.5V
Replace IC402/ 3 / 5 / 7
Re-download Micom software.
Check Micom Voltage
IC1002 pin 48 : +3.5V
IC1002 pin 48 : +3.5V
Replace L404
Check LVDS Power Voltage
Q409 : 12V
Replace Q409
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
Change Module
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
No
No
No
No
No
No
Check X201 Clock
24 MHz
Replace X201
ok
No
Replace Power board.
ok
2. Digital TV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.2V Power
IC3703 2 pin : 1.2V
Check IF_P/N Signal
TU3702 17/18 Pin
Replace IC3703
Check Tuner 5V Power
L3702
Check IC406,IC410
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
ok
ok
ok
ok
No
No
No
No
No
Replace IC406,IC410
No
Bad Tuner. Replace Tuner.
Replace L3702
ok
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