Yamaha DP-U50 Manual de servicio - Página 15
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I STANDARD OPERATION CHART
POWER SW to ON
or connecting AC cord
NG
Backup memory
check
Setting the initial settings
OK
Is the power
NO
turned on at the
standby mode ?
Reseting Gate arry IC
YES
& USB microcontroller
Resetting FL driver IC
IC436, 42pin: L
NO
Is the power
turned to ON?
YES
Turning the power control function on
IC436, 89pin: H
Turning the total mute and
IC436, 107pin: L
the mix mute function off
IC436, 110pin: H
Releasing Gate array IC
IC436, 112pin: L
from the resetting mode
DMVDD ON
Resetting YSS928
IC436, 30pin: H
and DAC ICs
Releasing the FL driver IC
IC436, 42pin: H
from the resetting mode
Displaying "Hello"
IC436, 102pin: H
Standby process
Self-Diagnosis
mode?
Did it pass 3.5
NO
seconds from the
starting -up ?
YES
Communicating with
GUI application
Turning the toatal mute
IC436, 111pin: H
functon off if headphone
IC436, 107pin: H
is not connected
Main process
DP-U50
14