Sanyo LCD-24XR10F, Service Manual, Page: 36 / 50

3
、
No sound, but picture is normal.
Check if
voltage of
N407-3# &
13# is +12V?
Check +12V of power
board and its related
circuits
.
Check if
N407-4# &
12# has input
signal?
Check if
voltage of N407-
6# & 7# is high
level?
Check peripheral
circuits of power
amplifier.
Check mute circuits of
power amplifier
Check if
N313-3# &
5# has input
signal?
Check earphone
amplified circuits
Check audio output
circuits of main chip
Yes
Yes
Yes
Yes No
No
No
No