DOWNLOAD LG 15LS1RA (CHASSIS:LN71A) Service Manual ↓ Size: 2.18 MB | Pages: 24 in PDF or view online for FREE

Model
15LS1RA (CHASSIS:LN71A)
Pages
24
Size
2.18 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
15ls1ra-chassis-ln71a.pdf
Date
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LG 15LS1RA (CHASSIS:LN71A) Service Manual ▷ View online

Mode
Section
Polarity DOT CLOCK Frequency  Total Period(E)
Display(A)
Front
Sync.(D)
Back
Resolution
Remark
[MHz]
[kHz]/ [Hz]
Porch (B)
Porch (F)
1
H(Pixels)
-
25.175
31.469
800
640
16
96
48
640 x 480
O
V(Lines)
-
59.94
525
480
10
2
33
2
H(Pixels)
+
40.0
37.879
1056
800
40
128
88
800 x 600
O
V(Lines)
+
60.317
628
600
1
4
23
3
H(Pixels)
+
35.999
35.156
1024
800
40
128
72
800 x 600
O
V(Lines)
+
56.250
800
600
1
4
24
4
H(Pixels)
-
65.0
48.363
1344
1024
24
136
160
1024 x 768
O
V(Lines)
-
60.004
806
768
3
6
29
- 13 -
6. Signal Timing(Resolution) 
- 15” only
- 14 -
TROUBLESHOOTING
No power 
(LED indicator off)
Check short of main B/D 
or Change LIPS.
Change IC903.
Change LED Assy.
Check 15V or 5V 
of LIPS.
Check Output of 
IC903.
Check LED Assy.
Check P901, P270,  Connector.
Fail
Fail
Change Q904.
Check Output of 
Q904.
Fail
Pass
Fail
Pass
Pass
Pass
:[A]Process
- 15 -
No Raster
Check LED Status 
on display unit.
Check the input/
Output of IC100.
Check 
IC900, IC901, IC906, IC908,
IC909, IC910.
Check inverter
connector or inverter.
Check inputting source cable
and jack. 
Repeat [A] PROCESS.
Fail
Change IC900, IC901, IC906,
IC908, IC909, IC910.
Fail
Change IC100.
Fail
Change inverter connector or
inverter.
Fail
Change panel link cable or
module.
Fail
Check panel link 
cable or module.
Pass
Pass
Pass
Pass
Pass
:[B]Process
- 16 -
No Raster on AV Signal
(Component, CVBS, S-VHS)
No Raster on TV(RF) signal
Change R103, R104, R106, R108,
R132, L822, L800, L801.
Check the
signal of R103, R104,
R106, R108, R132, L822,
L800, L801.
Repeat
[A] Process .
Check the output
of TU500.
Check the
input/ output  of IC100.
Check inputting source cable
and  jack.
Fail
Fail
Fail
Fail
Re-solder or change the defect part.
Check X100.
Check 5V of TU500.
Re-solder or change the
defect part.
Pass
Pass
Pass
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