4-15
4. Troubleshooting
4-1-3. No Video (HDMI - Digital Signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the HDMI source
-
Check the IC1001(Valencia)
-
Check if the LVDS cable is loose or not.
-
Diagnostics
First of all check the setting of the
external device.
And then check the HDMI cable.
If the problem still occurs,
replace the Main Board.
No
Yes
Does the digital data appear at output of
IC601 pin80~87(HDMI output)?
No
Yes
No video
Yes
Check the HDMI source and
check the connection of HDMI cable?
No
Input an HDMI signal.
Check the connected cable.
Yes
Change the IC601 or
the main PCB assembly.
Yes
Check the LVDS cable?
Check the T-con board?
Replace the LCD panel?
Please, contact Tech support.
No
Does the signal appear at
IC601 pin1~6, 99, 100(HDMI1),
pin8~15(HDMI2), pin17~24(HDMI3),
pin26~33(HDMI4)?
Does the digital data appear at
pin 15~81 of CN1902?
No
Change the IC1101 or
the main PCB assembly.
4
5
7
Caution
Make sure to disconnect the power before working on the PD board.
Notice
Refer to the next page for detailed locations.
Содержание UN46C6900VF
Страница 43: ...4 3 4 Troubleshooting ...
Страница 53: ...4 13 4 Troubleshooting Location Main TOP CN401 IC901 Location Main BOTTOM ...
Страница 54: ...4 14 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Страница 56: ...4 16 4 Troubleshooting Location Main TOP CN1902 IC601 IC1101 Location Main BOTTOM ...
Страница 57: ...4 17 4 Troubleshooting WAVEFORMS 4 5 HDMI Input CLK 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Страница 59: ...4 19 4 Troubleshooting Location Main TOP TU801 IC1101 CN1902 Location Main BOTTOM ...
Страница 60: ...4 20 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 6 Eagle Out Clk H Sync ...
Страница 62: ...4 22 4 Troubleshooting Location Main TOP TU801 IC1101 CN1902 Location Main BOTTOM ...
Страница 63: ...4 23 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Страница 65: ...4 25 4 Troubleshooting Location Main TOP R528 IC1101 CN1902 Location Main BOTTOM ...
Страница 66: ...4 26 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar ...
Страница 68: ...4 28 4 Troubleshooting Location Main TOP IC1101 CN1902 R503 R502 R501 Location Main BOTTOM ...
Страница 69: ...4 29 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 9 Component Input Y Pb ...
Страница 71: ...4 31 4 Troubleshooting Location Main TOP CN407 IC1101 IC301 Location Main BOTTOM ...
Страница 72: ...4 32 4 Troubleshooting WAVEFORMS 0 Audio Input Sign Wave I2S Input Clk Data Audio Amp Out Sign Wave ...