Sanyo LED-46XR123D, Service Manual

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3
．
No sound, but picture is normal:
Yes No
No
Yes
No
Yes No Yes
No sound
Check if level of
N607-PIN19&25
are all high?
Check if level of
V606-b is low?
Check if there is
signal inputted to
N607-PIN15&20&21
&22 ?
Check power voltage
of N607.
Check IIS
(signal input
circuits) on main
board.
Check Reset &
Mute circuits of
power amplifier.
Replace
V606
Check +24V on
power board.
Check IIC signal of
N607- PIN23&24.