The Picture Appears, But The Audio Does Not Appear - JVC LT-22HG45E Service Manual

THE PICTURE APPEARS,
BUT THE AUDIO DOES NOT
APPEARS.
Is SP WIRE CONNECTOR
connected?
Yes
Is there signal at wave
(SP.Lift) and wave
(SP.Right)?
No
Is there signal at pins 1
and 9 of IC YD1517(F)? and 9 of IC YD1517(F)?
Yes
Is there signal at pins 4
and 6 of IC YD1517(F)?
Yes
Is there voltage at pin 7
of IC YD1517(F)
+12VDC?
Yes
Change IC YD1517(F).
TROUBLESHOOTING GUIDE
No
Yes
Yes
Yes
Yes
Connect SP WIRE
CONNECTOR.
Change SPEAKER.
Check IC YD1517(F) and
peripheral circuit. peripheral circuit.
Check IC YD1517(F) and
peripheral circuit.
Check D514 and peripheral
circuit.