DOWNLOAD LG 55LEX8-SA (CHASSIS:LJ03S) Service Manual ↓ Size: 7.58 MB | Pages: 88 in PDF or view online for FREE

Model
55LEX8-SA (CHASSIS:LJ03S)
Pages
88
Size
7.58 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
55lex8-sa-chassis-lj03s.pdf
Date
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LG 55LEX8-SA (CHASSIS:LJ03S) Service Manual ▷ View online

13-4. 전원 계통도(BOX): D1.2V, A1.2V, D1.8V
D1.2V
P8000
IC8001
MP2208DL
+3.5V_ST
IC900
BCM3549
A1.2V
IC8002
MP2108DQ
D1.8V
IC603, IC604
IC605, IC606
DDR
A1.2V
Q200
+1.8V_HDMI
IC602
BD35331F
IC900
BCM3549
IC8300
TDA19997
DDR0_VREF0
DDR_VTT
IC603, IC604
DDR
IC603, IC604
DDR
DDR1_VREF0
L602
L601
L600
IC603, IC604
IC605, IC606
DDR
IC8101
Micom
IC8100
M24C16
P8200
IR&KEY
IC8200
MAX3232
1-1. Trouble shooting - No power
Check stand-by Voltage.
P8000  9~12pin : +3.5V_ST
Check Power connector
Main B/D 3.5V Line
Short Check
Check X8101 clock
32 KHz
Replace X8101
Check P8000 PWR_ON.
1pin : 3.3V
Replace Micom(IC8101 ) or Main board
Check Multi Voltage
P8000 2 pin : *24V , 17 pin : 12V
Replace Power Board
Check IC8001/2/3/4/5 Output Voltage
IC8001 : 1.2V,  IC8002 :  1.8V, IC8003 : 5V
IC8004 : 2.5V ,IC8005 : 3.3V
Replace IC8001/ 2/ 3/ 4 / 5
Re-download Micom software.
Check Micom Voltage
IC8101  pin 48 : +3.5V
Replace L8003
ok
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
No
No
No
Check X1001 Clock
54 MHz
Replace X1001
No
Replace Power board.
ok
Check DP Cable.
ok
Put the DP Cable in wafer
No
Main Board Check
Check HEAD Part(Next Page)
ok
Check X3001
27 Mhz
Replace X3001
No
1-2. Trouble shooting - No power
Check HEAD Part
Check X100 clock
25 MHz
Replace X100
Check Inverter Control 
P1305 25 pin : High
Check Power Board or Module
Check IC301/2/3/4/9 Output Voltage
IC301 : 3.3V,  IC302 :  1.0V, IC303 : 2.5V
IC304 : 1.2V ,IC309 : 5V
Replace IC301/2/3/4/9 
Check Power B/D 
P205 pin 1~7 : +24V
Replace T-Con Board
Check IC600 Output Voltage
L601 : 3.3V, C641 : 16V
Replace IC600
Check FRC(IC102)LVDS Output
Replace FRC(IC102)or T-con Board
Change Module
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
No
OK
Check X11400 Clock
54 MHz
Replace X11400
ok
No
Check IC301 Output Voltage
IC8903 : 3.3V,  IC302 : 1.0V
IC303 :  2.5V
No
Replace IC301/ 2/ 3
No
Check T-Con Board 
C1306,1307 : 24V
No
Check IC900 Output Voltage
L903 : 12V
Replace IC900
ok
No
T-Con Board Check
Check RF Cable & Signal
Check Tuner 3.3V Power
L701
Replace L701
Check Tuner 1.2V Power 
IC700  2pin : 1.26V
Check IF_P/N Signal
TU701 20/21 Pin
Replace IC700.
Check Tuner 5V Power
L700
Check IC8003
Check BCM LVDS Output
Replace  BCM( IC900) or Main Board.
ok
ok
ok
ok
ok
No
No
No
No
No
Replace IC8003
No
Bad Tuner. Replace Tuner.
Replace L8007
ok
2. Trouble shooting - No video (Digital TV video)
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