4-7
4. Troubleshooting
4-1-4. 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 M-star
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
19"/22"_C350
26"/32"_C350
No
Check a B+ voltage (#2 of Tuner) 5V,
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 #8 of TU2400?
Does the Signal appear at C4022
of IC4000?
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 LA19C350D1
Страница 34: ...1 4 1 Precautions Memo ...
Страница 53: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal ...
Страница 55: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Страница 57: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Страница 59: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal ...
Страница 61: ...4 12 4 Troubleshooting WAVEFORMS 6 The Signal are Inputed to IC1201 7 The Signal are Inputed to IC1202 ...
Страница 77: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram ...