4-15
4. Troubleshooting
4-1-8. 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 IC2002 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.
Yes
Check the Speaker?
Replace the Speaker?
Please, Contact Tech support
No
Does the digital data appear at
R2041, R2044~R2046?
No
Check IC5004
Change the main PCB assembly
@
Does the signal appear at R2002 ~
R2007 (PC, AV(Side AV), COMP1/2,
DVI), R5094 ~ R5101 (HDMI)?
Yes
Does the signal appear at
L2001, L2002?
No
Check IC2004
Change the main PCB assembly
#
Yes
!
Caution
Make sure to disconnect the power before working on the SMPS / IP Board.
Summary of Contents for LN32A550P3R
Page 7: ...1 4 1 Precautions Memo ...
Page 21: ...2 14 2 Product specifications Memo ...
Page 30: ...4 4 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Page 36: ...4 10 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Page 68: ...4 42 4 Troubleshooting Memo ...
Page 148: ...5 80 5 Exploded View Part List Memo ...
Page 150: ...6 2 6 Wiring Diagram ...
Page 153: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 MT8226 Block Diagram ...
Page 154: ...7 2 7 Schematic Diagram 7 2 Video Input Output Path ...
Page 155: ...7 3 7 Schematic Diagram ...
Page 156: ...7 4 7 Schematic Diagram 7 3 Audio INPUT OUTPUT ...
Page 157: ...7 5 7 Schematic Diagram ...
Page 158: ...7 6 7 Schematic Diagram 7 4 Schematic Diagrams 7 4 1 Main Power Block Function Block ...
Page 160: ...7 8 7 Schematic Diagram 7 2 4 Side AV IN OUT PC 7 2 5 HDMI Switch HDMI Input ...
Page 162: ...7 10 7 Schematic Diagram 7 2 8 DDR RAM Main EEPROM FLASH MEMORY 7 2 9 FBE2 ...
Page 163: ...7 11 7 Schematic Diagram 7 2 10 LVDS DIMMING ...
Page 164: ...7 12 7 Schematic Diagram Memo ...