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 SEMS01
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
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
Change a main PCB ass’y.
Does the signal appear at L3001?
Does the signal appear at R3169?
No
Please, Call to Samsung Co. LTD.
Check the LVDS cable?
Replace the LCD panel?
Yes
Connect the RF cable and
check RF signal.
Yes
1
2
Caution
Make sure to disconnect the power before working on the SMPS/IP.
Summary of Contents for LE19A65 A Series
Page 53: ...1 4 1 Precautions Memo ...
Page 63: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal ...
Page 65: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Page 67: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Page 89: ...6 4 6 Wiring Diagram 6 2 Wiring Picture 6 2 1 LE19A656A 6 2 2 LE19A651A ...
Page 90: ...6 5 6 Wiring Diagram 6 2 3 LE22A656A 6 2 4 LE19A651A ...
Page 92: ...6 7 6 Wiring Diagram 6 4 Cables Code BN39 00953D 30P 200mm Photo ...
Page 93: ...6 8 6 Wiring Diagram Memo ...