4-7
4. Troubleshooting
4-1-4. No Video (Tuner_CVBS)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Tuner CVBS source
Check the M-star
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check a B+ voltage (#7of Tuner) 5V,
change a main PCB ass’y.
No
No
Power Indicator is off.
Lamp on, no picure.
Yes
Change a main PCB ass’y.
Does the signal appear at R3235?
[4] Does the signal appear at C5068
of IC5001?
Check the LVDS cable?
Replace the LCD panel?
Please, Call to Samsung Co. LTD.
Yes
Connect the RF cable and
check RF signal.
Yes
Yes
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LE26A451C1HX
Page 133: ...3 6 3 Disassembly and Reassemble Memo ...
Page 137: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal ...
Page 139: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Page 141: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Page 143: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal ...
Page 145: ...4 12 4 Troubleshooting WAVEFORMS 2 Digital Output Data 5 Analog Signal Y C ...
Page 158: ...4 25 4 Troubleshooting 4 8 2 Software Upgrade Flash Downloader Flash Downloader ...
Page 163: ...6 4 6 Wiring Diagram 6 2 Wiring Picture ...
Page 169: ...1 4 1 Precautions Memo ...