
4-31
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 CN407 or
the main PCB assy.
No
Yes
No sound
Yes
Check the sound source and
check the connection of
sound cable?
No
Input a sound signal.
Check the connected cable.
Yes
Replace the speaker.
Please, contact Tech support.
No
Does the digital data
appear at R319, R320, R321?
No
Change CN302 or
the main PCB assembly.
!
Does the signal appear at R463,R464?
Yes
Does the signal appear at
pin1~4 of cn302?
No
Change IC303 or
the main PCB assembly.
@
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 UN46C7000WF
Страница 68: ...4 3 4 Troubleshooting ...
Страница 79: ...4 14 4 Troubleshooting Location Main TOP BOTTOM A B Detail A CN401 B IC6001 ...
Страница 80: ...4 15 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Страница 82: ...4 17 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A IC501 B CN2101 C IC1001 ...
Страница 83: ...4 18 4 Troubleshooting WAVEFORMS 4 5 HDMI Input CLK 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Страница 85: ...4 20 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A TU701 B CN2101 C IC1001 ...
Страница 86: ...4 21 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 6 Eagle Out Clk H Sync ...
Страница 88: ...4 23 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A TU701 B CN2101 C IC1001 ...
Страница 89: ...4 24 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Страница 91: ...4 26 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A CN408 R439 B CN2101 C IC1001 ...
Страница 92: ...4 27 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar ...
Страница 94: ...4 29 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A CN407 R431 R433 R432 B CN2101 C IC1001 ...
Страница 95: ...4 30 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 9 Component Input Y Pb ...
Страница 97: ...4 32 4 Troubleshooting Location Main TOP BOTTOM A B Detail A CN407 B CN302 CN2101 IC303 ...
Страница 98: ...4 33 4 Troubleshooting WAVEFORMS 0 Audio Input Sign Wave I2S Input Clk Data Audio Amp Out Sign Wave ...