Table of Contents
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E
NO
Normal Audio output
when disc playback?
YES
NO
Normal IR.VFD & Front
pannel key functions?
YES
TEST END
NO
Audio PWM IC received
correct data stream?
YES
NO
Normal Audio PWM IC
out?
YES
Check Audio filter,amplify,mute
circuit.
Communications between
NO
IR.VFD Front pannel k ey & MT1389
is n orma lly?
YES
Check the cable connection on
Front pannel.
- 3-8 -
Check connection between MT1379
& Audio PWM IC.
Check the related
circuit of Audio PWM IC.
Check communication lines on
MT1389.
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