4-17
4. Troubleshooting
4-1-9. No Sound
Symptom
Video is normal but there is no sound..
-
Major
checkpoints
When the speaker connectors are disconnected or damaged.
When the sound processing part of the Main Board is not functioning.
Speaker defect..
-
-
-
Diagnostics
Check IC3001 or Side-AV.
Change the main PCB ass’y or
side-AV assembly
No
Yes
Lamp(Backlight) Off, no sound.
Yes
Check the sound source and
check the connection of
sound cable?
No
Input a sound signal.
Check the connected cable.
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
Does the signal appear at C3029~
C3036,C3007,C3008,R3022,R3023
(VIDEO2,COMP,PC,DVI,HP),
R3039~R3042 of IC3001?
Yes
!
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 ...
