LG 22LS4R (CHASSIS:LP69C) Service Manual ▷ View online
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3. No RASTER on PC Signal
Repeat [A, B]
process.
Pass
Check the input/
output of R735,
R736.
Fail
Check the J701.
Pass
Re-soldering or change the
defect part, Check the X100.
defect part, Check the X100.
Check
the input/output
of R128, R131,
R136.
Pass
Check the
input/output of IC100.
Pass
Check input source cable and jack.
Fail
Fail
Re-soldering or Change
the defect part.
the defect part.
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4. No Raster on Component Signal
Repeat [A, B]
process.
Pass
Check the input/
output of R901.
Fail
Check the J900.
Pass
Re-soldering or change the
defect part. Check the X100.
defect part. Check the X100.
Check
the input/output
of R125.
Pass
Check the
input/output of IC100.
Pass
Check input source cable and jack.
Fail
Fail
Re-soldering or Change the defect part.
5. No Raster on HDMI Signal
6. No Raster on AV(Scart in
Video, S-Video) Signal
7. No Raster on TV(RF) Signal
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Repeat [A, B]
process.
Pass
Check the input/
output of IC100.
Fail
Re-soldering or change the
defect part. Check the X100.
defect part. Check the X100.
Pass
Check input source cable and jack.
Check input source cable and jack.
Repeat [A, B]
process.
Fail
Check the output
of TU600.
Pass
Pass
Fail
Check 5V of TU600.
Re-Soldering or change
the defect part.
Re-Soldering or change
the defect part.
Check
the input/output of
L804, L1002,L1003,
L1004.
Fail
Change L804, L1002,
L1003, L1004.
L1003, L1004.
Pass
Check input/output
of IC100.
Pass
Fail
Re-soldering of Change defect part.
Check the X100.
Check the X100.
Pass
Pass
8. No sound
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Check the input
Source.
Fail
Pass
Change the source input.
Check input/Output
of IC100.
Fail
Pass
Re-soldering of Change the defect part.
Check the X110
Check the X110
Check the input/
output of IC500
Fail
Re-soldering or Change
the defect part.
the defect part.
Pass
Check the Speaker
Pass
Check the Speaker wire.
Fail
Change Speaker.
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