NAD T534AH Service Manual page 18

E
NO
Normal Audio output
when disc playback?
YES
NO
Normal IR.VFD & Front
pannel key functions?
YES
TEST END
Audio DAC received
correct data stream?
YES
Normal Audio DAC
out?
YES
Check Audio filter,amplify,mute
circuit.
Communications between
IR.VFD Front pannel k ey & MT1389
is n orma lly?
YES
Check the cable connection on
Front pannel.
3-9
NO
Check connection between MT1379
& Audio DAC.
NO
Check the related
circuit of Audio DAC.
NO
Check communication lines on
MT1389.