Yamaha ARIUS YDP-161 Service Manual page 55

SYSTEM BOOTING FLOWCHART
Power ON
EICN = L (DM: IC100,D12)
TxD0 = H (DM: IC100,B7)
(TxD1 = H (DM: IC100,B6))
Set CPU, SWX Port
Register
Initialize BOOT SDRAM
0 clear, Setup of Constant
Yes
Installation mode?
No
In case of P2ROM
Port initial setting
/SPOFF=H(DM: IC153,2)
/MUTE=H(DM: IC153,4)
/DAC-IC=H(DM: IC153,6)
/MIDI-IC=H(DM: IC153,8)
(/SWP-IC=L(DM: IC153,11))
Port initial setting
/DAC-IC=L(DM: IC153,6)
/MIDI-IC=L(DM: IC153,8)
/MUTE=L(DM: IC153,4)
/SPOFF=L(DM: IC153,2)
Transmit Main Program
and Voice Parameter
to SDRAM
Cancel peripheral reset
/SWP-IC = H
Starts accessing to
DM: IC400.
SWP51L(DM: IC400)
Initialization
BACK-UP FLASH
(DM: IC103)
Initialization
Cancel peripheral reset
/DAC-IC=H(DM: IC153,6)
/MIDI-IC=H(DM: IC153,8)
Initialize EBUS driver
(EBUS Start)
EICN=H(DM: IC100,D12)
If the booting procedure stops here, there
is a possibility that the following parts are
damaged:
• PROGRAM [P2ROM] (DM: IC102)
• SDRAM (DM: IC101)
* "Factory Set" refers to the condition of turning on the power after executing "Factory Set" in the Test Program.
Starts accessing to
DM: IC102.
Starts accessing to
DM: IC101.
IC102
FLASH ROM?
No
Starts accessing to
DM: IC103.
Yes
REC flashes
Not to be used.
Yes
Test Program?
No
Yes
After executing
*
Factory Set?
No
Yes
Backup Clear is
started?
No
Yes
Song Clear is
started?
No
About three seconds after turning on power
Release Mute
/MUTE = L
Depending on whether
Release headphones are inserted or not.
SP OFF
Main
routine
YDP-161/YDP-161C
Produce sine wave sound
Test Program
Main routine
If this indication appears
every time, the following part
is damaged:
• DATA FLASH ROM
(DM: IC103)
REC/PLAY flashes
If this indication appears
every time, the following part
is damaged:
• DATA FLASH ROM
(DM: IC103)
REC/PLAY flashes
If this indication appears
every time, the following part
is damaged:
• DATA FLASH ROM
(DM: IC103)
REC/PLAY flashes
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