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

Check input signal format.
Is it supported?
Check Component Cable
for damage or open conductor.
Check JK1105
Y/PB/PR signal Line
ok
ok
ok
No
Replace Jack
Check COMP_DET Signal
Replace R1114 or R130
No
ok
No
Check BCM LVDS Output
Replace BCM( IC101) or Main Board.
5. Trouble shooting - No video (Component)
ok
No
Check FRC IC LVDS Output
Replace FRC ICIC5201) or Main Board.
Check input signal format.
Is it supported?
Check RGB Cable conductors
for damage or open conductor
Check EDID & EEPROM
IC802  I2C Signal R848, R847(SDA,SCL)
Check JK804
H/V_Sync/R/G/B Signal Line
L806/7/8
ok
ok
ok
No
No
Re-download EDID data or Replace the defective IC 
ok
Replace Jack
Check DSUB_DET
Replace R820
No
ok
No
Check BCM LVDS Output
Replace BCM( IC101) or Main Board.
6. Trouble shooting - No video (RGB-PC)
ok
No
Check FRC IC LVDS Output
Replace FRC IC (IC5201) or Main Board.
7. Trouble shooting - No video (HDMI)
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check HDMI Switch 
IC701 video Signal and I2C line
Check JK70 1 / 2 / 3 / 4
ok
ok
ok
No
No
Replace Coil 
ok
Replace Jack
Check HDMI Signal output
of  HDMI Switch (IC701)
Replace the defective IC.
No
Check L2103(+3.3V)
Replace the defective IC.
No
OK
ok
No
Check BCM LVDS Output
Replace BCM( IC101) or Main Board.
ok
No
Check FRC IC LVDS Output
Replace FRC IC(IC5201) or Main Board.
8. Trouble shooting - No Audio (all audio source)
Check the TV Speaker Menu
(Menu -> Sound -> TV Speaker)
On
ok
ok
Check Output Signal P1702
1, 2, 3, 4 pin.
Replace Audio AMP IC(IC1702)
ok
No
Check Connector & P1702
Replace connector
if found to be damaged.
ok
No
Check speaker resistance
and connector damage.
Replace speaker.
ok
No
Off
Toggle the Menu
Check AMP IC(IC1702) Power
*24V, 3.3V
No
Check Regulator L1709,L1710,L1711
Check Mstar I2S Output
R1754,5,6
No
Check signal line. 
Or replace BCM( IC101)
Check  AUDIO_MASTER_CLK
R1753
No
Replace BCM( IC101) or Main Board.
ok
Check AMP I2C Line
R1710,1711
No
Check signal line. 
Or replace BCM( IC101) 
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