4-7
4. Troubleshooting
4-1-4. No Video (Tuner_CVBS) (SX1)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Tuner CVBS source
-
Check the M-star
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
No
Check a B+ voltage (IC801 DRXK IC)
3.3V,1.25V.
Change a main PCB ass’y.
No
No
Power Indicator is off.
Lamp on, no picure.
Yes
Change a main PCB ass’y.
Does the signal appeat #43 of IC801?
(DRXK 43PIN CVBS_TP)
Does the Signal appear at
R505 of IC1102?
Check the LVDS cable?
Replace the LCD panel?
Please, Call to Samsung Co. LTD.
Yes
Connect the RF cable and
check RF signal.
Yes
Yes
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 ...