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3. No sound, but the picture is normal.
Check power 12/24V supplied
for C348 is normal or not?
Check if there is signal inputted to
power amplifier N402, check if MUTE
and power of N402 are normal or not?
Check if output of N101-P8/R9/R8/T8 are normal or
not and check if the voltage of N101-J16 is high level?
TV channel
Check
if
there
output from AVOUT ?
Check if DIF output
circuits of TUNER is
normal or not?
No sound, but the picture is normal.
Check if there is output from X402?
No
Yes
No
No
Check current channel.
USB channel
无
is
Check
if
format
supported?
Yes
YPbPr ,VGA，
AV channel
file
Check
is
signal
corresponding
terminal of N101?
Yes
Connection to speakers or
speakers have problem.
No
Check
V309
and its power
circuits
Check
if
Yes
amplifier N402 and
power
of
control
circuits are normal or
not?
Check if power amplifier
N402 is normal or not?
if
there
is
inputted
to
power
HDMI channel
Check if HDMI
N102(KEY)
is
normal or not?
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