4-16
4. Troubleshooting
4-1-7. No Video (Video CVBS)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Video CVBS source
Check the Chelsea.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check CN7005
Change the Main Assy
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the video source and
check the connection of video cable?
No
Input the video source properly.
Yes
Yes
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Please, Contact Tech support
No
Does the CVBS data appear at
TP - 7045?
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
No
Check IC4010 (Saturn4)
Change the Main Assy
2
No
Check a set
in the ‘Stand-by mode’.
4
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LA22B450C4H
Страница 185: ...1 4 1 Precautions Memo...
Страница 201: ...4 5 4 Troubleshooting LVDS PC_RGB HV_Sync MAINBOARD BOTTOM...
Страница 202: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output...
Страница 204: ...4 8 4 Troubleshooting HDMI 2 HDMI 1 MAINBOARD TOP...
Страница 205: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output...
Страница 207: ...4 11 4 Troubleshooting B3 3V_PW Tuner_CVBS B5V_VCCT_PW MAINBOARD TOP...
Страница 208: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output...
Страница 210: ...4 14 4 Troubleshooting TS_DATA B1 2V_PW B3 3V_PW B5V_VCCT_PW MAINBOARD TOP...
Страница 211: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output...
Страница 213: ...4 17 4 Troubleshooting MAINBOARD BOTTOM...
Страница 214: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output...
Страница 216: ...4 20 4 Troubleshooting MAINBOARD BOTTOM...
Страница 217: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output...
Страница 220: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out...
Страница 241: ...4 45 4 Troubleshooting Connecting the TV with STB SBB...
Страница 259: ...4 63 4 Troubleshooting 4 10 PCB diagram...
Страница 260: ...4 64 4 Troubleshooting...
Страница 261: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram 26 32 37 40...