4-1-7. No Sound
Symptom Audio is normal but no picture is displayed on the screen. -
Major
checkpoints
Check the RF Source -
Check the TAS5715 -
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. -
Diagnostics
No
Check a connection harness and
headphone jack./Side AV.
Check Sound Processor IC1102.
No
Picture is display, no sound.
Check a B13V Line.
Change a main PCB ass’y.
No
Does the signal appear at
pin #15,#20,#21,#22 of IC1603?
Check the DC 13V BD1603_13VS
of IC1603?
Please, Contact Tech support.
No
Does the sound data appear at
TP L-,L+,R_,R+?
Replace the speaker ass’y?
Yes
Connect a sound cable.
control a volume.
Yes
1
Yes
3
Yes
2
Caution Make sure to disconnect the power before working on the IP board.
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