3-9
E
Audio DAC received
correct data stream?
Normal Audio output
when disc playback?
Normal IR.VFD & Front
panel key functions?
TEST END
NO
NO
YES
YES
YES
YES
Check connection between
MT1389D & Audio DAC.
NO
Normal Audio DAC out?
YES
Check the related circuit of
Audio DAC.
NO
Check Audio
filter,amplify,mute
circuit.
Communications between
IR.VFD Front panel key &
MT1389D is normally?
NO
Check communication lines
on MT1389D.
Check the cable connection
on Front panel.
