Sanyo LED-22XR10F, Руководство по обслуживанию

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3
、
No sound, but picture is normal.
Check if
voltage of N406-
2#/3#/34#/35#/
40#/41#/44#/45#
is +12V?
Check +12V of power
board and its related
circuits
.
Check if
N407-15#
/20- 22# has
input signal?
Check if
voltage of N407-
19# / 25# is high
level?
Check peripheral
circuits of power
amplifier.
Check mute circuits of
power amplifier
Check if
N313-3# / 5#
has input
signal?
Check mute circuits of
power amplified
Check audio output
circuits of main chip
Yes
Yes
Yes
No Yes
No
No
No