Toshiba 15DLV77B Service Manual page 72

NO SOUND DVD/CD ANALOG
AUDIO
Does this have signal
at pins 8 and 10 of
CP8501?
No
Does this have signal
at pins 7 and 8 of
IC8502?
No
Does this have signal
at pins 113, 115, 116
and 118 of IC4001?
No
Change IC4001.
NO SOUND DVD/CD DIGITAL
AUDIO
Does this have signal
at pin1 of CP8501?
No
Does this have signal
at pin110 of IC4001?
No
Change IC4001.
TROUBLESHOOTING GUIDE
Yes
Yes
Yes
Yes
Yes
E-11
Refer to "LCD SECTION".
Check pins 7 and 8 of IC8501
and peripheral circuit.
Change IC8502.
Check J706 and peripheral
circuit.
Check IC4001 and
peripheral circuit.