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 DC B5V_PW, TU33V_PW
appear at pin #3, 5 of tuner?
No
Yes
Is power inductor LED off?
Lamp(Backlight) on and no video?
Yes
Check the RF source
and the connection.
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 CVBS data appear at R836?
Does the digital data appear at
OD(D3+),
ODD_TXCLK-(D3-)?
No
Check IC1102(SETD-10).
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 LE19C45 Series
Страница 7: ...1 4 1 Precautions Memo ...
Страница 20: ...4 3 4 Troubleshooting Power CN2001 Pin 1 2 3 4 5 6 7 8 9 Dimming out A13V GND GND GND A5V A5V NC Panel Setting ...
Страница 22: ...4 5 4 Troubleshooting ...
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 ...
Страница 26: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 28: ...4 11 4 Troubleshooting ...
Страница 29: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 31: ...4 14 4 Troubleshooting ...
Страница 32: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 34: ...4 17 4 Troubleshooting ...
Страница 35: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 37: ...4 20 4 Troubleshooting ...
Страница 38: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 40: ...4 23 4 Troubleshooting ...
Страница 41: ...4 24 4 Troubleshooting WAVEFORMS 6 I2S DATA 7 Speaker out ...
Страница 56: ...4 39 4 Troubleshooting 4 9 PCB diagram ...
Страница 57: ...4 40 4 Troubleshooting ...