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.
Содержание LN32A450C1D
Страница 6: ...1 4 1 Precautions Memo ...
Страница 18: ...3 6 3 Disassembly and Reassemble Memo ...
Страница 22: ...4 4 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Страница 24: ...4 6 4 Troubleshooting WAVEFORMS 4 5 HDMI Input CLK 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Страница 30: ...4 12 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Страница 36: ...4 18 4 Troubleshooting WAVEFORMS Audio Input Sign Wave 12S Input Clk Data Audio Amp Out Sign Wave ...
Страница 50: ...4 32 4 Troubleshooting Memo ...
Страница 107: ...6 4 6 Wiring Diagram Memo ...
Страница 108: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 Internal Block Diagram of Scaler MSD2248AL ...
Страница 109: ...7 2 7 Schematic Diagram 7 2 SCHEMATIC Block Diagram ...
Страница 110: ...7 3 7 Schematic Diagram 7 3 SlimHalf Tuner Diagram ...
Страница 111: ...7 4 7 Schematic Diagram 7 2 Schematic Diagrams 7 2 1 STANDBY ...
Страница 112: ...7 5 7 Schematic Diagram 7 2 2 FUNCTION KEY 7 2 3 LCD OPTION ...
Страница 113: ...7 6 7 Schematic Diagram 7 2 4 FBE ...
Страница 114: ...7 7 7 Schematic Diagram 7 2 5 ATSC HALF NIM TUNER 7 2 6 DVI SOUND INPUT ...
Страница 115: ...7 8 7 Schematic Diagram 7 2 7 HDMI INPUT ...
Страница 116: ...7 9 7 Schematic Diagram 7 2 8 SIDE HDMI CONNECTOR 7 2 9 SOUND AMP ...
Страница 117: ...7 10 7 Schematic Diagram Memo ...