4-9
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 MSD2248AL
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check TU5001
Change the main PCB assembly
or tuner.
Power Indicator is off.
Lamp(Backlight) Off, no video
No
Check the RF source and
check the connection of RF cable?
Yes
Check IC3001
Change the main PCB assembly
No
Does the digital data appear at output
of R5006~R5020, R5022~R5029?
Does the digital data appear
at R5022~R5029(TS DATA)
Check IC4001
Change the main PCB assembly
No
Does the digital data appear at output
of R3082F~R3095F?
No
Please, Contact Tech support
Check the LVDS cable?
Replace the LCD panel?
Yes
Input the RF signal.
Check the connected cable.
Yes
Yes
7
6
Yes
7
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LN26A330J1D
Page 7: ...1 4 1 Precautions Memo ...
Page 127: ...5 104 5 Exploded View Part List Memo ...
Page 131: ...4 4 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Page 139: ...4 12 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Page 159: ...4 32 4 Troubleshooting Memo ...
Page 160: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 26 Wiring Diagram ...
Page 161: ...6 2 6 Wiring Diagram 6 2 40 Wiring Diagram ...
Page 162: ...6 3 6 Wiring Diagram ...
Page 164: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 Internal Block Diagram of Scaler MSD2248AL ...
Page 165: ...7 2 7 Schematic Diagram 7 2 SCHEMATIC Block Diagram ...
Page 166: ...7 3 7 Schematic Diagram 7 3 SlimHalf Tuner Diagram ...
Page 167: ...7 4 7 Schematic Diagram 7 2 Schematic Diagrams 7 2 1 STANDBY ...
Page 168: ...7 5 7 Schematic Diagram 7 2 2 FUNCTION KEY 7 2 3 LCD OPTION ...
Page 169: ...7 6 7 Schematic Diagram 7 2 4 FBE ...
Page 170: ...7 7 7 Schematic Diagram 7 2 5 ATSC HALF NIM TUNER 7 2 6 DVI SOUND INPUT ...
Page 171: ...7 8 7 Schematic Diagram 7 2 7 HDMI INPUT ...
Page 172: ...7 9 7 Schematic Diagram 7 2 8 SIDE HDMI CONNECTOR 7 2 9 SOUND AMP ...
Page 173: ...7 10 7 Schematic Diagram Memo ...