4-22
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
Does the sound data appear at
R524 / R525 (AV1, COMP1)
R549 / R550 (COMP2)
R419 / R420 (PC / DVI)?
Does the sound data appear at
- L-, L+, R-, R+?
Does the DC B13 V appear at BD209?
Yes
Yes
Yes
Yes
Input the sound source properly.
Please, Contact Tech support.
Check CN504, CN402.
Change the Main Assy.
Check IC1001 (X5).
Check IC301 (Sound AMP).
Change the Main Assy.
Change the Main Assy.
No
No
No
No
No
Check the source and check the connection of
sound cable (Comp / PC / DVI to HDMI)?
Replace speaker?
7
Yes
Check the Self Diagnosis
(Support
Self Diagnosis
Picture Test)
Dose the promblem still exist self diagnosis?
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LN26D450G1G
Page 28: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 31: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 34: ...4 12 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 37: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 40: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 43: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
