DOWNLOAD LG 20HIZ2 (CHASSIS:LP69F) Service Manual ↓ Size: 1.54 MB | Pages: 30 in PDF or view online for FREE

Model
20HIZ2 (CHASSIS:LP69F)
Pages
30
Size
1.54 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
20hiz2-chassis-lp69f.pdf
Date
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LG 20HIZ2 (CHASSIS:LP69F) Service Manual ▷ View online

- 13 -
TROUBLESHOOTING
No power 
(LED indicator off)
Check short of main B/D 
or Change Lips.
Change Q903.
Change LED Assy.
Check 15V or 5V 
of Lips.
Check Input/Output
of Q903.
Check LED Assy.
Check S/W update, connector P281
Fail
Fail
Fail
Pass
Pass
Pass
:[A]Process
- 14 -
No Raster
Check LED Status 
on TV.
Check Inverter on
Check Inverter connector.
Check
IC900, IC901, IC906,
IC907, IC909, IC910
output voltage.
Repeat [A] PROCESS.
Fail
Change Lips.
Fail
Change Defect IC.
Fail
Check input signal cabel.
Fail
Check panel link cable.
Pass
Pass
Pass
:[B]Process
Pass
- 15 -
No Raster on AV Signal
(CVBS/S-VHS/SCART/TUNER)
Check L822, R124, R831
of video signal.
If CVBS of RCA(AV2).
Repeat [A] Process .
If YC
Yes
Fail
Yes
Check L822, R124, R831
of video signal.
Repeat [A] Process.
Pass
No
Pass
If RGB of SCART
Yes
Check R280, R281, R282, R110,
R112, R114 of video singal
No
Yes
If If CVBS of SCART
Yes
Check L205, R210, R121 of
video signal.
Check Signal Input jack
Check IC911/906
and Lips
Change Tuner.
No
If Tuner
Yes
Yes
5V_Tuner is On
Video valid on tuner Pin-13
Yes
- 16 -
No Sound
Check the speaker wire
Change source input.
Check the 
input source.
Fail
Pass
Re-solder or Change the
defect part.
Check X301.
Check the input/output 
of IC100
Fail
Pass
Re-solder or change the
defect part.
Check the input/output 
of IC400
Fail
Pass
Change the speaker
Check the speaker
Fail
Pass
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