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
Check the source and
check the connection of sound cable?
(Comp/AV/PC/DVI to HDMI)
Does the sound data appear at
TP - COMP_SL_IN, COMP_SR_IN (COMP)
TP - AV_SL_IN, AV_SR_IN (AV)
TP - PC_SL_IN, PC_SR_IN (PC/DVI) ?
Does the DC B12VS
appear at TP - B12VS1?
Replace speaker.
Does the sound data appear at
TP - SPK_ L-, SPK_L+, SPK_R-, SPK_R+?
Input the sound source properly.
Check CN802, CN801, CN901.
Change the Main Assy.
Change the Main Assy.
Please, Contact Tech support.
Check I102 (SX1).
Check IC1301 (Sound AMP).
Yes
Yes
Yes
Yes
No
No
No
No
No
6
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LE32C53 Series
Page 28: ...4 3 4 Troubleshooting ...
Page 30: ...4 5 4 Troubleshooting ...
Page 31: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 33: ...4 8 4 Troubleshooting ...
Page 34: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 36: ...4 11 4 Troubleshooting ...
Page 37: ...4 12 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 39: ...4 14 4 Troubleshooting ...
Page 40: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 42: ...4 17 4 Troubleshooting ...
Page 43: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 45: ...4 20 4 Troubleshooting ...
Page 46: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 48: ...4 23 4 Troubleshooting ...
Page 49: ...4 24 4 Troubleshooting WAVEFORMS 6 Speaker out ...
Page 66: ...4 41 4 Troubleshooting 4 9 3 Main Inner 2 4 9 4 Main Inner 3 ...
Page 67: ...4 42 4 Troubleshooting 4 9 5 Main Bottom ...
Page 68: ...4 43 4 Troubleshooting 4 9 6 Power_32 SMPS LC5XX 4 9 7 Power_37 SMPS LC5XX ...
Page 69: ...4 44 4 Troubleshooting 4 9 8 Power_40 SMPS LC5XX 4 9 9 Power_46 SMPS LC5XX ...
Page 70: ...4 45 4 Troubleshooting 4 9 10 Power_26 SMPS LC45X 4 9 11 Power_32 SMPS LC45X ...