E
Normal
Audio output
when disc playback?
Normal
IR. VFD & Front
pannel key
functions?
TEST END
Audio
DAC received
correct data stream?
Normal
Audio DAC
out? (IC601)
Check Audio filter, amplify, mute
circuit. (IC602 Application circuit)?
Check the cable connection
on Front pannel.
Check connection between MT1379
& Audio DAC. (Check VRST#, ACLK,
ABCK, ASDAT3)
Check the related circuit of
Audio DAC. (Check Audio
out Pin 14, 15,18,19)
Check communi cation lines
on MT1379.
Communications
between IR.VFD Front pannel key
& MT1379 & Front u-com(IC901)
is normally?
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