4-19
4. Troubleshooting
4-1-4. No Video_Tuner - CVBS (X4)
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
Does the DC B5V_TU_PW, TU33V_PW
appear at #3, #4 Pin of Tuner?
Does the digital data appear at
TP-, E_TXCLK-,
, O_TXCLK- ?
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'
Input the RF source properly.
Please, Contact Tech support.
Change the Main Assy.
Check IC3002 (X4).
Change the Main Assy.
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the RF source and
check the connection of RF cable ?
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LA22C450E1
Страница 34: ...1 4 1 Precautions Memo ...
Страница 51: ...4 4 4 Troubleshooting WAVEFORMS 12 PC input V sink H sink R G B 3 LVDS output ...
Страница 53: ...4 6 4 Troubleshooting WAVEFORMS 1 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 55: ...4 8 4 Troubleshooting WAVEFORMS 1 CVBS OUT Grey Bar 2 LVDS output ...
Страница 57: ...4 10 4 Troubleshooting WAVEFORMS 1 LVDS output ...
Страница 59: ...4 12 4 Troubleshooting WAVEFORMS 1 I2S Data 2 Speaker out ...
Страница 63: ...4 16 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Страница 65: ...4 18 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 67: ...4 20 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 69: ...4 22 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 71: ...4 24 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 73: ...4 26 4 Troubleshooting WAVEFORMS 7 Speaker out ...
Страница 97: ...6 2 6 Wiring Diagram 26 32 T CON MainBoard IP Board CN1405 CN1503 Speaker Speaker Function CN301 CN10_18P ...