4-10
4. Troubleshooting
4-1-5. 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 Tuner, Check the Chelsea.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Change the Main Assy
No
Yes
Does the CVBS data appear at
#9 pin of Tuner?
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the RF source and
check the connection of RF cable?
No
Input the RF source properly.
Yes
Check Tuner
Change the Main Assy
Yes
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Please, Contact Tech support
No
Does the DC TU5V_PW, TU33V_PW
appear at #3, #5 Pin of Tuner?
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
4
2
No
Check a set
in the ‘Stand-by mode’.
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LE32B53 SERIES
Страница 22: ...4 5 4 Troubleshooting PC RGB HV sync LVDS MAINBOARD B ...
Страница 23: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Страница 25: ...4 8 4 Troubleshooting HDMI3 HDMI2 HDMI1 MAINBOARD T ...
Страница 26: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 28: ...4 11 4 Troubleshooting B5V_VCCT_PW B3 3V_PW TUNER_CVBS MAINBOARD T ...
Страница 29: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 31: ...4 14 4 Troubleshooting B5V_VCCT_PW B3 3V_PW B1 2V_PW TS DATA MAINBOARD T ...
Страница 32: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 34: ...4 17 4 Troubleshooting AV2_CVBS MAINBOARD B ...
Страница 35: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 37: ...4 20 4 Troubleshooting Pr Pb Y MAINBOARD B ...
Страница 38: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 41: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...
Страница 60: ...4 43 4 Troubleshooting 4 9 PCB diagram 4 9 1 PCB layout FHD 32 37 40 46 MAIN BOARD ...
Страница 61: ...4 44 4 Troubleshooting 4 9 2 Main TOP 4 9 3 Main Inner 2 ...
Страница 62: ...4 45 4 Troubleshooting 4 9 4 Main Inner 3 4 9 5 Main Bottom ...