4-18
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
-
Check if the LVDS cable is loose or not.
-
Diagnostics
Change the TU701 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 TU701?
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, contact Tech support.
No
Does the digital data appear at
Pin 11~81 of CN1602 ?
No
Change the IC1001 or
the main PCB assembly.
5
Caution
Make sure to disconnect the power before working on the PD board.
Notice
Refer to the next page for detailed locations.
Summary of Contents for UN46C9000ZF
Page 95: ...4 3 4 Troubleshooting ...
Page 103: ...4 11 4 Troubleshooting Location Main TOP BOTTOM B A E C D Detail A B C D E ...
Page 105: ...4 13 4 Troubleshooting Location Main TOP BOTTOM B A Detail A B ...
Page 106: ...4 14 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Page 108: ...4 16 4 Troubleshooting Location Main TOP BOTTOM C B A Detail A B C ...
Page 111: ...4 19 4 Troubleshooting Location Main TOP BOTTOM B A C Detail A B C ...
Page 112: ...4 20 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 6 Eagle Out Clk H Sync ...
Page 114: ...4 22 4 Troubleshooting Location Main TOP BOTTOM B A C Detail A B C ...
Page 115: ...4 23 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Page 117: ...4 25 4 Troubleshooting Location Main TOP BOTTOM B A C Detail A B C ...
Page 118: ...4 26 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar ...
Page 120: ...4 28 4 Troubleshooting Location Main TOP BOTTOM B A C Detail A B C ...
Page 121: ...4 29 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 9 Component Input Y Pb ...
Page 123: ...4 31 4 Troubleshooting Location Main TOP BOTTOM B D A C Detail A B C D ...