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.
Содержание LN32A550P3R
Страница 7: ...1 4 1 Precautions Memo ...
Страница 21: ...2 14 2 Product specifications Memo ...
Страница 23: ...3 2 3 Disassembly and Reassemble Description Picture Description Screws 3 Lift up the rear cover ...
Страница 30: ...4 4 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Страница 32: ...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 36: ...4 10 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Страница 42: ...4 16 4 Troubleshooting WAVEFORMS Audio Input Sign Wave 12S Input Clk Data Audio Amp Out Sign Wave ...
Страница 66: ...4 40 4 Troubleshooting 3 2 Self EDID 1 Option Table control EDID Protect On EDID Protect off EDID WRITE ...
Страница 68: ...4 42 4 Troubleshooting Memo ...
Страница 148: ...5 80 5 Exploded View Part List Memo ...
Страница 149: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram 6 1 1 LN32A550P3R LN40A550P3R LN46A550P3R ...
Страница 150: ...6 2 6 Wiring Diagram ...
Страница 153: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 MT8226 Block Diagram ...
Страница 154: ...7 2 7 Schematic Diagram 7 2 Video Input Output Path ...
Страница 155: ...7 3 7 Schematic Diagram ...
Страница 156: ...7 4 7 Schematic Diagram 7 3 Audio INPUT OUTPUT ...
Страница 157: ...7 5 7 Schematic Diagram ...
Страница 158: ...7 6 7 Schematic Diagram 7 4 Schematic Diagrams 7 4 1 Main Power Block Function Block ...
Страница 159: ...7 7 7 Schematic Diagram 7 2 2 Audio Codec Pop Noise Solution Sound Amp NTP3100 7 2 3 Back AV IN OUT ...
Страница 160: ...7 8 7 Schematic Diagram 7 2 4 Side AV IN OUT PC 7 2 5 HDMI Switch HDMI Input ...
Страница 161: ...7 9 7 Schematic Diagram 7 2 6 Tuner Service Block HDMI Input 4 7 2 7 Video Decoder Scaler MT8226 Sub Micom WT6198 ...
Страница 162: ...7 10 7 Schematic Diagram 7 2 8 DDR RAM Main EEPROM FLASH MEMORY 7 2 9 FBE2 ...
Страница 163: ...7 11 7 Schematic Diagram 7 2 10 LVDS DIMMING ...
Страница 164: ...7 12 7 Schematic Diagram Memo ...