DOWNLOAD LG 55LW5600 (CHASSIS:LA12C) Service Manual ↓ Size: 5.04 MB | Pages: 90 in PDF or view online for FREE

Model
55LW5600 (CHASSIS:LA12C)
Pages
90
Size
5.04 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
55lw5600-chassis-la12c.pdf
Date
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LG 55LW5600 (CHASSIS:LA12C) Service Manual ▷ View online

1. Trouble shooting - No power
Check stand-by Voltage.
P501  9~12pin : +3.5V_ST
Check Power connector
Main B/D 3.5V Line
Short Check
Check X602 clock
32 KHz
Replace X602
Check P501 PWR_ON.
1pin : 3.3V
Replace Micom(IC602 ) or Main board
Check Multi Voltage
P501 2 pin : *24V , 17 pin : 12V
Replace Power Board
Check Inverter Control 
P501 18 pin : High
Check Power Board or Module
Check IC501/4/5/8 Output Voltage
IC501 : 0.9V,  IC508 :  1.5V
IC504 : 2.5V ,IC505 : 3.3V
Replace IC501/4/5/8
Re-download Micom software.
Check Micom Voltage
IC602  pin 48 : +3.5V
Replace L503
Check LVDS Power Voltage
Q507 : 12V
Replace Q507 
Change Module
ok
ok
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
No
No
No
No
No
Check X101 Clock
54 MHz
Replace X101
ok
No
Replace Power board.
ok
Check IC5401/2/3 Output Voltage
IC5401 : 1.26V,  IC5402 : 3.3V, IC5403 : 1.5V
Replace IC5401/2/3
ok
No
Check RF Cable & Signal
Check Tuner 3.3V Power
L2103
Replace L2103
Check Tuner 1.26V Power 
IC2103  2pin : 1.26V
Check IF_P/N Signal
TU2101 17/18 Pin
Replace IC2103.
Check Tuner 5V Power
L2104,2101
Check IC507
Check  BCM LVDS Output
Replace  or BCM( IC101) or Main Board.
ok
ok
ok
ok
ok
No
No
No
No
No
Replace ICIC507
No
Bad Tuner. Replace Tuner.
Replace L2101/4
ok
2. Trouble shooting - No video (Digital TV video)
Check  FRC IC LVDS Output
Replace  or FRC IC ( IC5201) or Main Board.
No
ok
3. Trouble shooting - No video (Analog TV video)
Check RF Cable & Signal
Check Tuner 3.3V Power
L2103
Replace L2103
Check Tuner 1.2V Power 
IC2103   2 pin : 1.2V
Check CVBS Signal
TU2101  11 Pin
Replace IC2103.
Check Tuner 5V Power
L2104,2101
Check IC507
ok
ok
ok
ok
ok
No
No
No
No
No
Replace IC507
No
Bad Tuner. Replace Tuner.
Replace  L2104,2101
ok
Check BCM LVDS Output
Replace BCM( IC101) or Main Board.
ok
No
Check FRC IC LVDS Output
Replace FRC IC(IC5201) 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 JK11055 , JK1102 CVBS Signal Line
ƒ Rear AV : R1140 
ƒ Side AV : R1136
ok
ok
ok
No
Replace Jack
ok
Check CVBS_DET Signal
• Rear AV Detect : R1129
• Side AV Detect : R1113
Replace R1129 or R1113
No
No
Check  BCM LVDS Output
Replace  LGE35230( IC101)
or Main Board.
ok
No
Check FRC IC LVDS Output
Replace  or FRC IC ( IC5201) or Main Board.
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