4-30
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
Change the CN408 (COMP, AV),
CN402(PC), CN406(Audio out) or
the Main PCB assy.
Change IC1001, IC301 or
the main PCB assy.
No
No
Yes
Yes
No sound
Yes
Check the sound source and
check the connection of
sound cable?
No
Input a sound signal.
Check the connected cable.
Replace the speaker.
Please, contact Tech support.
No
Does the signal appear at main board?
COMP/AV : R438, R440
PC : R423, R424
Monir out : R446, R447
Does the digital data appear at
Main board?
R1303 : VAL_MCLK
R1304 : VAL_BCLK
R1305 : VAL_LRCLK
R1306 : VAL_DATA
Yes
Does the signal appear at
Pin1~4 on CN302, Pin1~4 on CN301?
No
Change IC303, IC302 or
the main PCB assy.
@
Yes
0
!
Caution
Make sure to disconnect the power before working on the PD board.
Notice
Refer to the next page for detailed locations.
Содержание UN46C9000ZF
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Страница 112: ...4 20 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 6 Eagle Out Clk H Sync ...
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Страница 115: ...4 23 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
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Страница 118: ...4 26 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar ...
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Страница 121: ...4 29 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 9 Component Input Y Pb ...
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Страница 124: ...4 32 4 Troubleshooting WAVEFORMS 0 Audio Input Sign Wave I2S Input Clk Data Audio Amp Out Sign Wave ...