4-16
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 Valencia
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Caution
Make sure to disconnect the power before working on the PD board.
Diagnostics
Change the TU5001_EA or
the main PCB assembly.
No
Yes
No video
Yes
Check the RF source and
check the connection of RF cable?
No
Input the RF signal.
Check the connected cable.
Yes
6
Does the signal appear at
pin11, 12 of TU5001_EA?
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, contact Tech support.
No
Does the digital data appear at
pin 15~81 of CN9301?
No
Change the IC7001 or
the main PCB assembly.
7
Содержание UN40C8000XM
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Страница 16: ...4 9 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Страница 18: ...4 11 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Страница 19: ...4 12 4 Troubleshooting WAVEFORMS 1 PC Input V Sync H Sync 2 LVDS Out CLK ...
Страница 21: ...4 14 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Страница 22: ...4 15 4 Troubleshooting WAVEFORMS 3 4 HDMI Input CLK 5 TS DATA Out Clk Data 0 ...
Страница 24: ...4 17 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Страница 25: ...4 18 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 Eagle Out Clk H Sync ...
Страница 27: ...4 20 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Страница 28: ...4 21 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 Eagle Out Clk H Sync ...
Страница 30: ...4 23 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Страница 31: ...4 24 4 Troubleshooting WAVEFORMS 7 Eagle Out Clk H Sync 9 Component Input Y Pb ...
Страница 33: ...4 26 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Страница 34: ...4 27 4 Troubleshooting WAVEFORMS 0 Audio Input Sign Wave I2S Input Clk Data Audio Amp Out Sign Wave ...