Standard Operation Chart - Yamaha DP-U50 Service Manual

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I STANDARD OPERATION CHART
POWER SW to ON
or connecting AC cord
Backup memory
check
OK
Is the power
turned on at the
standby mode ?
YES
Resetting FL driver IC
Is the power
turned to ON?
YES
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L 13942296513
Turning the power control function on
Turning the total mute and
the mix mute function off
Releasing Gate array IC
from the resetting mode
DMVDD ON
Resetting YSS928
and DAC ICs
Releasing the FL driver IC
from the resetting mode
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Displaying "Hello"
.
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NG
Setting the initial settings
NO
Reseting Gate arry IC
& USB microcontroller
IC436, 102pin: H
IC436, 42pin: L
NO
Standby process
IC436, 89pin: H
IC436, 107pin: L
IC436, 110pin: H
IC436, 112pin: L
IC436, 30pin: H
IC436, 42pin: H
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2 9
8
Communicating with
Turning the toatal mute
functon off if headphone
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3 6 7 1 3 1 5
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.
9 4 2 8
Self-Diagnosis
mode?
Did it pass 3.5
NO
seconds from the
starting -up ?
YES
GUI application
IC436, 111pin: H
IC436, 107pin: H
is not connected
0 5 8 2 9 9 4 2 8
Main process
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DP-U50
9 9
9 9
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