Durabrand DTV1307 Service Manual page 23

NO SOUND
Is sound setting appropriate ?
Yes
Is the waveform at pins 6
and 8 of IC1001?
No
Is the AUDIO signal at pin
7 of IC7301?
No
Is the AUDIO signal input
at pin 3 of IC7301?
No
Check J703 and at pins 17 and 18 of
CP2403 and associated circuit.
TROUBLESHOOTING GUIDE
Yes
Yes
Yes
E-5
Check speaker and headphone jack.
Check IC7301 and associated circuit .
Check the pins 2, 4 of IC701 and
associated circuit .