DOWNLOAD LG 55LX9500-UA (CHASSIS:LA02R) Service Manual ↓ Size: 4.93 MB | Pages: 105 in PDF or view online for FREE

Model
55LX9500-UA (CHASSIS:LA02R)
Pages
105
Size
4.93 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
55lx9500-ua-chassis-la02r.pdf
Date
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LG 55LX9500-UA (CHASSIS:LA02R) Service Manual ▷ View online

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 P404 PWR_ON.
1pin : 3.3V
Replace Micom(IC8101 ) or Main board
Check Multi Voltage
P8000 2 pin : *20V , 17 pin : 12V
Replace Power Board
Check Inverter Control 
P8000 18 pin : High
Check Power Board or Module
Check IC402/3/5/7 Output Voltage
IC8001 : 1.2V,  IC8003 :  1.8V
IC8004 : 2.5V ,IC8005 : 3.3V
Replace IC8001/ 3 /4 / 5
Re-download Micom software.
Check Micom Voltage
IC8101  pin 48 : +3.5V
Replace L8003
Check LVDS Power Voltage
Q8004 : 12V
Replace Q8004 
Check FRC(IC9001)LVDS Output
Replace FRC(IC9001)or Main Board
Change Module
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
No
No
No
No
OK
No
Check X1001 Clock
54 MHz
Replace X1001
ok
No
Replace Power board.
ok
Check IC402/3/5/7 Output Voltage
IC8903 : 3.3V,  IC8001 : 1.5V
IC8902 :  1.2V
No
Replace IC8901/ 2/ 3
No
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
TU700 17/18 Pin
Replace IC700.
Check Tuner 5V Power
L700
Check IC8003
Check FRC and BCM LVDS Output
Replace Mstar(IC9001) or 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)
3. Trouble shooting - No video (Analog TV video)
Check RF Cable & Signal
Check Tuner 3.3V Power
L701
Replace L701
Check Tuner 1.2V Power 
IC700   2 pin : 1.2V
Check CVBS Signal
TU700  11 Pin
Replace IC700.
Check Tuner 5V Power
L700
Check IC8003
ok
ok
ok
ok
ok
No
No
No
No
No
Replace IC8003
No
Bad Tuner. Replace Tuner.
Replace  L8007
ok
Check FRC and BCM LVDS Output
Replace Mstar (IC9001) 
or BCM( IC900) or Main Board.
4. Trouble shooting - No video (AV)
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
Check JK100 , JK8600 CVBS Signal Line
ƒ Rear AV : R105, R904 
ƒ Side AV : R919, R8603
ok
ok
ok
No
Replace Jack
ok
Check CVBS_DET Signal
• Rear AV Detect : R113
• Side AV Detect : R8608
Replace R113 or R8608
No
No
Check FRC and BCM LVDS Output
Replace LGE7378A(IC9001) or LGE3549XS( IC900)
or Main Board.
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