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 SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
2
3
1
No
Check a B+ voltage (#3 of Tuner) 5V,
change a main PCB ass’y.
No
No
Power Indicator is off.
Lamp on, no picure.
Yes
Check a TU5002_SLIM
Change a main PCB ass’y.
Does the signal appear at C5016?
[4] Does the signal appear at
pin 9 of TU5002_SLIM?
Does the digital data appear at the
output of LVDS (RA4074~RA4079)?
No
Please, Contact Tech support.
Check the LVDS cable?
Replace the LCD panel?
Yes
Connect the RF cable and
check RF signal.
Yes
1
2
3
Yes
No
Check a IC4001
Change a main PCB ass’y
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LE32A676A
Страница 25: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal ...
Страница 27: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Страница 29: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Страница 31: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal ...
Страница 33: ...4 12 4 Troubleshooting WAVEFORMS 2 Digital Output Data 5 Analog Signal Y C ...
Страница 35: ...4 14 4 Troubleshooting WAVEFORMS 6 The Signal are Inputed to IC2102 7 The Signal are Inputed to IC2104 ...
Страница 283: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram ...
Страница 285: ...6 3 6 Wiring Diagram 6 2 Wiring Picture ...