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4-13
4. Troubleshooting
4-1-5. No Video (Tuner DTV)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the DTV source
-
Check the Tuner (TU601)
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Check the D-TV source.
No
Yes
Does the DC TU5V_PW, TU33V_PW
appear at #2, #4 Pin of Tuner?
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the connection of RF cable ?
No
Insert the RF cable properly.
Yes
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support.
No
Check the ‘signal strength’
in Self Diagnosis menu
Strength is enough?
Does the digital data appear at
Pin #16,17 (LVDS Data clk)
of LVDS connector?
No
Check IC201 (Saturn4).
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
2
No
Check if the set is in
'Stand-by mode.'
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LN26C350D1D
Page 23: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 25: ...4 8 4 Troubleshooting Location Main TOP BOTTOM A B Detail A Pin 7 Pin 12 B LVDS CLK LVDS CLK ...
Page 26: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 29: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 32: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 34: ...4 17 4 Troubleshooting Location Main TOP BOTTOM B A Detail A COMP_YCVBS B LVDS CLK LVDS CLK ...
Page 35: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 38: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 41: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...
Page 67: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram ...