DOWNLOAD LG 42LH20FD (CHASSIS:LT91A) Service Manual ↓ Size: 4.29 MB | Pages: 75 in PDF or view online for FREE

Model
42LH20FD (CHASSIS:LT91A)
Pages
75
Size
4.29 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lh20fd-chassis-lt91a.pdf
Date
PREV: LG 42LH20D (CHASSIS:LB91A) Service Manual

LG 42LH20FD (CHASSIS:LT91A) Service Manual ▷ View online

Check the CVBS Cable
YES
Check MAIN B’D
C2013, C2014
MAIN B’D
C2013 (Right Sound)
C2014 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
Component Video OK ?
YES
Check MAIN B’D JK400
Replace MAIN B’D JK400
NO
YES
Making 
Revision 
2009. 2 . 1
24/34
LCD TV
Symptom
Component No Audio Problem
26~42LH2000
32~47LH3000/LH4000
Check the PC Audio Cable
YES
Check MAIN B’D
C2015, C2016
MAIN B’D
C2015 (Right Sound)
C2016 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
RGB Video OK ?
YES
Check MAIN B’D JK401
Replace MAIN B’D JK401
NO
YES
Making 
Revision 
2009. 2 . 1
25/34
LCD TV
Symptom
RGB, HDMI-PC No Audio Problem
26~42LH2000
32~47LH3000/LH4000
HDMI Video OK ?
YES
Check the ADJUST MENU
EDID OK ?
YES
Download EDID
(Refer to Adjustment Spec)
NO
Check the HDMI Cable
Replace MAIN B’D IC100
YES
Making 
Revision 
2009. 2 . 1
26/34
LCD TV
Symptom
HDMI-DTV No Audio Problem
26~42LH2000
32~47LH3000/LH4000
Check the SCART Cable
YES
Replace MAIN B’D
IC1103
MAIN B’D
R239 (Right Sound)
R240 (Left Sound)
signal ?
NO
YES
Replace MAIN B’D IC 100
Analog TV Audio OK
YES
Check MAIN B’D JK1100
Replace MAIN B’D JK1100
NO
YES
Check the Trouble Shooting Guide
Analog TV No video
NO
Making 
Revision 
2009. 2 . 1
27/34
LCD TV
Symptom
AV1 No Audio Out Problem
26~42LH2000
32~47LH3000/LH4000
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