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.
Содержание LE26C45 Series
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Страница 31: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
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Страница 34: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
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Страница 37: ...4 12 4 Troubleshooting WAVEFORMS 2 LVDS output ...
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Страница 40: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 42: ...4 17 4 Troubleshooting ...
Страница 43: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 45: ...4 20 4 Troubleshooting ...
Страница 46: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 48: ...4 23 4 Troubleshooting ...
Страница 49: ...4 24 4 Troubleshooting WAVEFORMS 6 Speaker out ...
Страница 66: ...4 41 4 Troubleshooting 4 9 3 Main Inner 2 4 9 4 Main Inner 3 ...
Страница 67: ...4 42 4 Troubleshooting 4 9 5 Main Bottom ...
Страница 68: ...4 43 4 Troubleshooting 4 9 6 Power_32 SMPS LC5XX 4 9 7 Power_37 SMPS LC5XX ...
Страница 69: ...4 44 4 Troubleshooting 4 9 8 Power_40 SMPS LC5XX 4 9 9 Power_46 SMPS LC5XX ...
Страница 70: ...4 45 4 Troubleshooting 4 9 10 Power_26 SMPS LC45X 4 9 11 Power_32 SMPS LC45X ...