4-25
4. Troubleshooting
4-1-7. No Sound (X4)
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 TP - COMP1_AV1_SL_
IN, COMP1_AV1_SR_IN (AV1, COMP1)
TP - COMP2_SL, COMP2_SR (Comp2)
TP - SIDE_AV_AV2_SL_IN, SIDE_AV_AV2_SR_IN(AV2)
TP - PC_DVI_SL_IN, PC_DVI_SR_IN (PC/DVI) ?
Does the DC B3.3V, B13V
appear at TP - B3.3V, B13V?
Yes
Yes
Yes
Input the video source properly.
Please, Contact Tech support.
Check CN1101, CN1107_N22
(CN1107_22), CN1203.
Change the Main Assy.
Check IC3002 (X4).
Change the Main Assy.
No
No
No
No
Check the source and check the connection of
sound cable (Comp/PC/DVI to HDMI) ?
Replace speaker?
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LA22C450E1
Страница 34: ...1 4 1 Precautions Memo ...
Страница 51: ...4 4 4 Troubleshooting WAVEFORMS 12 PC input V sink H sink R G B 3 LVDS output ...
Страница 53: ...4 6 4 Troubleshooting WAVEFORMS 1 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 55: ...4 8 4 Troubleshooting WAVEFORMS 1 CVBS OUT Grey Bar 2 LVDS output ...
Страница 57: ...4 10 4 Troubleshooting WAVEFORMS 1 LVDS output ...
Страница 59: ...4 12 4 Troubleshooting WAVEFORMS 1 I2S Data 2 Speaker out ...
Страница 63: ...4 16 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Страница 65: ...4 18 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 67: ...4 20 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 69: ...4 22 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 71: ...4 24 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 73: ...4 26 4 Troubleshooting WAVEFORMS 7 Speaker out ...
Страница 97: ...6 2 6 Wiring Diagram 26 32 T CON MainBoard IP Board CN1405 CN1503 Speaker Speaker Function CN301 CN10_18P ...