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4 Troubleshooting
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
3
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
6
7
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
7
8
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
7
8
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
7
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
7
9
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
7
10
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
12
13
4-17
4 Troubleshooting
Memo
4-18