Toshiba 15DV703R Service Manual page 90

Speaker No Sound (Test signal:
Audio problem
No Audio issue
Yes
Is the TV volume
set to "Mute"?
Please make sure the signal cable is
connected and has output. Remove the
headphone.
Yes
Check IC19 power
pin6,7,12,13=12Vdc
Yes
Check IC19
audio output
Yes
Check IC19
output signal
Yes
Check net "MUTE" and "HP" circuit
0.5Vrms @1KHz sine waveform)
Increase the volume level by
Yes
pressing the VOL + button on the
remote control or
Note: Speaker will be muted when
headphone is connected.
No
Check U1
No
Check equipment output
No
IC19 fails
-
on the TV.
83