Yamaha n8 Service Manual page 135

3. Checking A/D output
ADO1 to ADO8
Digital audio signal with the signal amplitude of approximately 3.3 V, MSB fi rst 24 bit is detected at ADO1 to ADO8.
Set the word clock of the TL255 at trigger source to observe with an oscilloscope as 2 ch signals are transferred through one signal
line with time-division way.
The reference is TL258 (DGND).
Normally, the result will be as follows.
TL255 (WCK)
ADO1 to ADO8
TL238
TL241
TL240
4. Checking D/A input
DAI1 to DAI7
Digital audio signal with the signal amplitude of approximately 3.3 V, MSB fi rst 24 bit is detected at DAI1 to DAI7.
Set the word clock of the TL255 at trigger source to observe with an oscilloscope as 2 ch signals are transferred through one signal
line with time-division way.
The reference is TL258 (DGND).
Normally, the result will be as follows.
TL255 (WCK)
DAI1 to DAI7
24 bit (Odd Channel)
(TL255)
24 bit (Odd Channel)
24 bit (Even Channel)
TL239
TL242
TL244
TL245
TL243
24 bit (Even Channel)
n8/n12
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