Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD TV LN-S5296D 09_Troubleshooting

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4 Troubleshooting

4-1 No Power

LAMP Off, power indicator LED No Check a connection power cable.
on? P/N: BN39-00639A
Yes s
Ye
Does proper Stand-By DC No Change the Main Power Ass'y
A5V appear at C1875 ? 40" : BN44-00140A
46" : BN44-00141A
Yes
52" : BN44-00150A
Does proper Main DC No
B12V,B5V,B12VS appear at
C181, C186, C167?

Yes
Does proper Inverter DC No
120V appear at CN102 in
SMPS?
Yes
Check IC151
Change the Main Ass'y
Does proper DC A3.3V appear No
40 " : BN94-01008E
at C159 ? 46" : BN94-01008D
52" : BN94-01107A
Yes
Check
Does proper DC S3.3V_D, IC183, IC185, IC102, IC103, IC104, IC105
No
B3.3V, +12V,B5V appear at Change the Main Ass'y
C1847,C1858, C181,C1834? 40 " : BN94-01008E
46" : BN94-01008D
Yes 52" : BN94-01107A

Does proper MEM_S2.5V No Check IC015, IC041
ALBA_S1.2V appear at Change the Main Ass'y
C0148,C0425? 40 " : BN94-01008E
46" : BN94-01008D
52" : BN94-01107A
Yes

No Check a other function (No picture part)
A power is supplied to set ? Replace a LCD Panel
40" : BN07-00288A
46" : BN07-00291A
52" : BN07-00340A

4-1
4 Troubleshooting

4-2 No Video (Analog PC Signal)

Power Indicator is off.
Lamp on, no video

Yes

Check the PC source and No Input an analog PC signal.
check the connection of
Check the connected cable.
DSUB?

Yes

Does the signal appear at No Check CN093, PC cable.
1 #w1, #u1, #AB2, #F1,#G1 Change the PC cable. Change the
(R,G,B,H,V) of IC101? main PCB ass'y
Yes

Does the digital data
2 appear at output of No Check IC901
RA061~RA063,RA065, Change the main PCB ass'y
RA067,RA068?

Yes

Does the digital data No Check IC071
3 appear at output of
Change the main PCB ass'y
R1010~5, R1024~7?

Yes

Check the LVDS cable? No
Please, call to Samsung Co. LTD
Replace the LCD panel?

4-2
4 Troubleshooting

WAVEFORMS
1 2

4-3
4 Troubleshooting

4-3 No Video (HDMI - Digital Signal)

Power Indicator is off.
Lamp on, no video.

Yes

Check the HDMI source No Input an HDMI signal.
and check the connection Check the connected cable.
of HDMI cable?

Yes
Does the signal appear at
R0910,R0912,R0913,R0914 No Check CN091, CN092, HDMI cable.
4
,R0915,R0916,R0943~0948 Change the HDMI cable. Change
(DATA),R097,R099,R0938, the main PCB ass'y
R0940(Clk+/-)?

Yes

Does the digital data
No Check IC091
5 appear at output of
RA093~096 ? Change the main PCB ass'y

Yes

Does the digital data
appear at output of R1034-7, No Check IC101
6
R1039,RA061~063,RA065,R Change the main PCB ass'y
A067,RA068?

Yes

Does the digital data appear No Check IC071
7
at output of RA071~RA712? Change the main PCB ass'y

Yes

Check the LVDS cable ? No
Please, call to Samsung Co. LTD.
Replace the LCD panel ?

4-4
4 Troubleshooting

WAVEFORMS
4 5

4-5
4 Troubleshooting

4-4 No Picture (Tuner_CVBS)

Power Indicator is off.
Lamp on, no picture.

Yes

Check the RF source and No
check the connection of RF Input the RF signal.
cable ? Check the connected cable.

Yes
Check RF111.
Does the signal appear at No Check splitter cable connection.
the main splitter cable ? Change the main PCB ass'y or splitter
cable.
Yes

Does the signal appear at No Check TU501.
8
TU112 ? Change the main PCB ass'y or tuner.

Yes

Does the digital data
appear at output of R1034-7, No Check IC101
6
R1039,RA061~063,RA065,R Change the main PCB ass'y
A067,RA068?

Yes

Does the digital data appear No Check IC071
7
at output of RA071~RA712? Change the main PCB ass'y

Yes

Check the LVDS cable ? No
Please, call to Samsung Co. LTD.
Replace the LCD panel ?

4-6
4 Troubleshooting

WAVEFORMS
6

4-7
4 Troubleshooting

4-5 No Picture (Tuner DTV TS)

Power Indicator is off.
Lamp on, no picture.

Yes

Check the RF source and No
check the connection of RF Input an RF signal.
cable? Check the connected cable.

Yes

Check the RF source and Check CN501.
No Check splitter cable connection.
check the connection of
RF cable ? Change the main PCB ass'y or
splitter cable.
Yes

Does the digital data appear at No
RA111, RA112 (TS data) and Check TU112.
7
RA113(sync,valid,clock) Change the main PCB ass'y or tuner.

Yes

Does the digital data appear
at output of RA031~033, No Check IC1001
8
RA035,RA037,RA039 and Change the main PCB ass'y
R031,R032,R033?

Yes

Does the digital data
appear at output of R1034-7, No Check IC101
6
R1039,RA061~063,RA065,R Change the main PCB ass'y
A067,RA068?

Yes

Does the digital data appear No Check IC071
7
at output of RA071~RA712? Change the main PCB ass'y

Yes

Check the LVDS cable ? No
Please, call to Samsung Co. LTD.
Replace the LCD panel ?

4-8
4 Troubleshooting

WAVEFORMS
6

4-9
4 Troubleshooting

4-6 No Picture(Video CVBS)
Power Indicator is off.
Lamp on, no picture.
Yes

Check the video source and No Input a video signal.
check the connection of Check the connected cable.
video cable?

Yes

No Check CN171 or Side-AV
Does the signal appear at Change the main PCB ass'y or
6
C1021 or C1048 of IC102? Side-AV Ass'y

Yes

Does the signal appear at No
Check IC102
C0651 of IC101?

Yes

Does the digital data
appear at output of R1034-7, No Check IC101
6
R1039,RA061~063,RA065,R Change the main PCB ass'y
A067,RA068?

Yes

Does the digital data appear No Check IC071
7
at output of RA071~RA712? Change the main PCB ass'y

Yes

Check the LVDS cable ? No
Please, call to Samsung Co. LTD.
Replace the LCD panel ?

4-10
4 Troubleshooting

WAVEFORMS
6

4-11
4 Troubleshooting

4-7 No Picture(S-Video 1,2)
Power Indicator is off.
Lamp on, no picture.
Yes

Check the video source and No Input a video signal.
check the connection of Check the connected cable.
s-video cable?

Yes
Does the signal appear No Check CN179 or Side-AV
9 at C1024,C1042,C1050, Change the main PCB ass'y or Side-
C1052(Y,C) of IC102 ? AV Ass'y

Yes

Does the signal appear at No
Check IC102
C0653,C0645 of IC101?

Yes

Does the digital data
appear at output of R1034-7, No Check IC101
6
R1039,RA061~063,RA065,R Change the main PCB ass'y
A067,RA068?

Yes

Does the digital data appear No Check IC071
7
at output of RA071~RA712? Change the main PCB ass'y

Yes

Check the LVDS cable ? No
Please, call to Samsung Co. LTD.
Replace the LCD panel ?

4-12
4 Troubleshooting

WAVEFORMS
6

4-13
4 Troubleshooting

4-8 No Picture(Component1, 2 : 480i, 480p, 720p, 1080i[ Y, Pb, Pr] )
Power Indicator is off.
Lamp on, no picture.
Yes

Check component source No Input a component signal.
and check the connection of Check the connected cable.
component cable ?

Yes
Does the signal appear
10 at C0625,C0644,C0640, No Check CN173, CN172
C0626,C0643,C0638 Change the main PCB ass'y
(Y,Pb,Pr) of IC101 ?

Yes

Does the digital data
appear at output of R1034-7, No Check IC101
6
R1039,RA061~063,RA065,R Change the main PCB ass'y
A067,RA068?

Yes

Does the digital data appear No Check IC071
7
at output of RA071~RA712? Change the main PCB ass'y

Yes

Check a LVDS cable ? No
Please, call to Samsung Co. LTD.
Replace a LCD panel ?

4-14
4 Troubleshooting

WAVEFORMS
6

4-15
4 Troubleshooting

4-9 No Sound

Picture is display, no sound.

Yes

Check the sound source and No Input a sound signal.
check the connection of
Check the connected cable.
sound cable ?

Yes

11
Does the signal appear at Check IC163 or Side-AV.
#59,51(AV,S-Video, No
Change the main PCB ass'y or
Component L,R), #53,54(AV1), side-AV Ass'y
#56,57(PC) of IC 161?

Yes

12 Does the digital data appear at No Check IC165
#74,4,5,6(Mclk,Sclk,LRclk,data)
Change the main PCB ass'y
of IC165 ?

Yes

13 Does the signal appear at No Check IC162
L161,164,165,168 (L/R output) ? Change the main PCB ass'y

Yes

No
Replace the speaker ass'y ? Please, call to Samsung Co. LTD.

4-16
4 Troubleshooting

WAVEFORMS
11

4-17
4 Troubleshooting

Memo

4-18

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