Yamaha n8 Service Manual page 138

n8/n12
The clock is supplied by the MLAN circuit board and provided to SSP1, A/D converter and D/A converter from the 100-pin
connector (CN109) through IC118.
The reference GND is TL258 (DGND).
TL254
TL255
Timing relation of each clock is shown in the following table.
256FS
(TL253)
128FS
(TL104)
64FS
(TL254)
WCK
(TL255)
7. Checking mute control
TL256 (L:MUTE)
L:MUTE is a mute control signal for analog output
(STEREO, C-R A/B/C, AUX, C-R PHONES, AUX
PHONES).
When the point is at "L" level (0 V), muting circuit
will be activated and muting transistor of each output is
turned on. ("H" level is +5.0 V)
Normally, the level is at "L" when the power is turned
ON/OFF, sampling frequency is changed, or bus reset
of IEEE1394 is produced.
The reference GND for observing/measuring the point
is TL258 (DGND) basically, but TL260 (AGND) can
also be used.
138
TL104
# Compared to Up Edge of WCK, Down Edge of other
clocks are almost at the same position.
TL253
TL256