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 CN5002(COMP), CN5011
(PC, DVI), CN7005(AV), JA3201_
EU(SCART) Change the Main Assy
No
Yes
Does the B12VS_PW
appear at TP2007~8?
No
Yes
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI).
Yes
Change the Main Assy
Does the sound data appear at
CN5002(COMP), CN5011(PC, DVI),
CN7005(AV), JA3201_EU(SCART)?
No
Input the sound source properly.
Yes
Replace speaker
Please, Contact Tech support
No
Does the sound data appear at
TP - L-, L+, R-, R+?
No
Check IC4010 (Saturn4)
Check IC9002 (Sound AMP)
Change the Main Assy
7
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LA22B450C4H
Страница 185: ...1 4 1 Precautions Memo...
Страница 201: ...4 5 4 Troubleshooting LVDS PC_RGB HV_Sync MAINBOARD BOTTOM...
Страница 202: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output...
Страница 204: ...4 8 4 Troubleshooting HDMI 2 HDMI 1 MAINBOARD TOP...
Страница 205: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output...
Страница 207: ...4 11 4 Troubleshooting B3 3V_PW Tuner_CVBS B5V_VCCT_PW MAINBOARD TOP...
Страница 208: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output...
Страница 210: ...4 14 4 Troubleshooting TS_DATA B1 2V_PW B3 3V_PW B5V_VCCT_PW MAINBOARD TOP...
Страница 211: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output...
Страница 213: ...4 17 4 Troubleshooting MAINBOARD BOTTOM...
Страница 214: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output...
Страница 216: ...4 20 4 Troubleshooting MAINBOARD BOTTOM...
Страница 217: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output...
Страница 220: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out...
Страница 241: ...4 45 4 Troubleshooting Connecting the TV with STB SBB...
Страница 259: ...4 63 4 Troubleshooting 4 10 PCB diagram...
Страница 260: ...4 64 4 Troubleshooting...
Страница 261: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram 26 32 37 40...