4-22
4. Troubleshooting
4-1-8. 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 CN7005, CN5011, CN5004
Change the Main Assy
BN94-02990A
No
No
Does the DC B3.3V, B12V
appear at IC9002?
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI)?
Yes
Yes
No
No
Does the I2C data appear at R4408?
Does the sound data appear at
CN7005(AV R/L)
CN5004(COMP R/L)
CN5011(DVI/PC R/L)?
Check IC4010 (Saturn4)
Check IC9002 (Sound AMP)
Change the Main Assy
BN94-02990A
No
Does the sound data appear at
TP - RP, RN (R +/-)
TP - LP, LN (L +/-)?
No
Please, Contact Tech support
Replace speaker?
Change the Main Assy
BN94-02990A
Yes
Check IC9002 (Audio CODEC)
Change the Main Assy
BN94-02990A
Input the sound source properly.
6
7
Yes
Yes
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LA22B650T6M
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Страница 21: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
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Страница 24: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
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Страница 27: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
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Страница 30: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 32: ...4 20 4 Troubleshooting ...
Страница 33: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 35: ...4 23 4 Troubleshooting ...
Страница 36: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...