Sanyo LCD-42XR56DZ, Service Manual

Page: 27 / 45

3
．
There is picture but no sound.
Yes Yes Yes
No No No
Yes
No
No sound
Check if the voltage
of
NV02-4/5/32/32#
is 24V ?
Check 24V power supply
circuits on power board and
power supply circuits from
XV03 to NV02 on main board
are normal ?
Check if the voltage
of
NV02-10/27# is
high level ?
Check if the
voltage of
NS01-F16/H16#
is low level?
Change
another
NV02
Check if circuits from
NS01-126/148# to
NV02-10/27# are
normal?
Touch CV04
and CV05
with probe,
check if there
is sound from
earphones?
Check if
audio
output
circuits
of main
chip are
normal?
Check if
there is
sound from
earphones?
Change
another
NS01
Check if circuits
about earphone
amplifier are
normal ?