4-15
4. Troubleshooting
4-1-8. No Video (Component 1, 2)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Component source
Check the MSD2248AL
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check JA5002
Change the main PCB ass’y
Power Indicator is off.
Lamp(Backlight) Off, no video
No
Check component source and
check the connection of
component cable ?
Check IC3001
Change the main PCB assembly
Does the signal appear at
C3016~C3019 and C3025(Y,Pb,Pr)
of IC3001?
No
Check IC4001
Change the main PCB assembly
No
Does the digital data appear at output
of R3082F~R3095F?
Does the digital data appear at output
of R5006~R5020, R5022~R5029?
No
Please, Contact Tech support
Check the LVDS cable?
Replace the LCD panel?
Yes
Yes
Input a component signal.
Check the connected cable.
Yes
6
Yes
7
Yes
0
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LN32A450C1D
Page 6: ...1 4 1 Precautions Memo ...
Page 18: ...3 6 3 Disassembly and Reassemble Memo ...
Page 22: ...4 4 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Page 30: ...4 12 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Page 50: ...4 32 4 Troubleshooting Memo ...
Page 107: ...6 4 6 Wiring Diagram Memo ...
Page 108: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 Internal Block Diagram of Scaler MSD2248AL ...
Page 109: ...7 2 7 Schematic Diagram 7 2 SCHEMATIC Block Diagram ...
Page 110: ...7 3 7 Schematic Diagram 7 3 SlimHalf Tuner Diagram ...
Page 111: ...7 4 7 Schematic Diagram 7 2 Schematic Diagrams 7 2 1 STANDBY ...
Page 112: ...7 5 7 Schematic Diagram 7 2 2 FUNCTION KEY 7 2 3 LCD OPTION ...
Page 113: ...7 6 7 Schematic Diagram 7 2 4 FBE ...
Page 114: ...7 7 7 Schematic Diagram 7 2 5 ATSC HALF NIM TUNER 7 2 6 DVI SOUND INPUT ...
Page 115: ...7 8 7 Schematic Diagram 7 2 7 HDMI INPUT ...
Page 116: ...7 9 7 Schematic Diagram 7 2 8 SIDE HDMI CONNECTOR 7 2 9 SOUND AMP ...
Page 117: ...7 10 7 Schematic Diagram Memo ...
