4-23
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 LA32C530F1R
Страница 49: ...4 4 4 Troubleshooting MAINBOARD T T CON ...
Страница 51: ...4 6 4 Troubleshooting MAINBOARD B ...
Страница 52: ...4 7 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Страница 54: ...4 9 4 Troubleshooting MAINBOARD T ...
Страница 55: ...4 10 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 57: ...4 12 4 Troubleshooting MAINBOARD T ...
Страница 58: ...4 13 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 60: ...4 15 4 Troubleshooting MAINBOARD T ...
Страница 61: ...4 16 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 63: ...4 18 4 Troubleshooting MAINBOARD B ...
Страница 64: ...4 19 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 66: ...4 21 4 Troubleshooting MAINBOARD B ...
Страница 67: ...4 22 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 69: ...4 24 4 Troubleshooting MAINBOARD B MAINBOARD T ...
Страница 70: ...4 25 4 Troubleshooting WAVEFORMS 6 Speaker out ...
Страница 89: ...4 44 4 Troubleshooting 4 9 PCB diagram 4 9 1 PCB layout 4 9 2 Main TOP ...
Страница 90: ...4 45 4 Troubleshooting 4 9 3 Main Inner 2 4 9 4 Main Inner 3 ...
Страница 91: ...4 46 4 Troubleshooting 4 9 5 Main Bottom ...
Страница 92: ...4 47 4 Troubleshooting 4 9 6 Power_32 SMPS 4 9 7 Power_37 SMPS ...
Страница 93: ...4 48 4 Troubleshooting 4 9 8 Power_40 SMPS 4 9 9 Power_46 SMPS ...