System Booting Flowchart - Yamaha PSR-1500 Service Manual

PSR-1500/PSR-3000

SYSTEM BOOTING FLOWCHART

PSR-1500
Power ON
Set CPU Resister
Initialize Port
/DACIC = L
/MUTE = L
/SPOFF = L
Initialize Enhancing port
/TG-RES=L
Initialize LCD
brightness DA1=0
Initialize
BOOT Work RAM
/TG-RES = H
Initialize
E-BUS driver
(EBUS Start)
If the booting procedure stops here, there is a
possibility that the IC(s) below is (are) damaged:
CPU
SDRAM
E-BUS
Opening screen
will appear
Installation mode?
No
Is Main Program defective?
No
Reripheral Reset
/DACIC = L
/TG-RES = L
Initialize Work RAM
Release the initialization of the peripheral devices
/DACIC = H
/TG-RES = H
Transmit Main
Program to RAM
Transmit Voice Parameter to RAM
If the booting procedure stops here, there is a
possibility that the IC below is damaged:
SDRAM
Test Program?
No
Factory Set?
FLAG = 1
No
Initialize keyboard(E-BUS)
LINE will appear
Turning the power off under writing data into it, Etc.
BackUP FlashROM
has broken data
No
74
After turning on the power:
L L (*invisible)
After exiting the test program:
H L
DM circuit board
/DACIC:IC4, 2pin
/MUTE:IC10, 2pin
/SPOFF:IC4, 5pin
/TG-RES:IC39, 7pin
Screen will brighten
DM circuit board
DA1:IC7, 238pin
DM circuit board
/DACIC:IC4, 2pin
/MUTE:IC10, 2pin
/SPOFF:IC4, 5pin
/TG-RES:IC39, 7pin
Send a message to E-BUS IC
Yes
Please insert the
INSTALER CARD
Yes Installation failure, Etc.
Program error!
Please install the Program
DM circuit board
/DACIC:IC4, 2pin
/MUTE:IC10, 2pin
/SPOFF:IC4, 5pin
/TG-RES:IC39, 7pin
Yes
Test Program
If Factory Set is executed,
FLAG = 0 1
Yes
After exiting
the test
program,
return to start
Force Format Mode
Send a message to E-BUS IC
Keyboard input is not accepted yet
Yes
Improper power shut down!
Backup data and/or
Userfiles have been lost.
Data restration
Yes
Factory Set?
FLAG = 1
No
Check BackUP Data & Cookie.
If these are damaged, there
will be initialized
If the booting procedure stops here, there is a
possibility that the IC below is damaged:
BackUp FlashROM
Clear Registration
or
Factory Set? FLAG = 1
Initialize Registration backup
No
Check Registration data.
If it is dameged, these will
be initialized.
If the booting procedure stops here, there is a
possibility that the IC below is damaged:
BackUp FlashROM
Yes
Factory Set?
FLAG = 1
If the booting procedure stops here, there is a
No
possibility that the IC below is damaged:
SDRAM
Owner's name will appear
Yes
Backup Flash ROM
is not formatted
Format BackUP FlashROM
No
If the booting procedure stops here, there is a
possibility that the IC below is damaged:
BackUp FlashROM
Copyright(c)2004
will appear
Clear System BackUP?
or
Factory Set? FLAG = 1
Initializing system setup.
No
Recover System BackUP
Release Mute
Release SP OFF
DM circuit board
/MUTE:IC10, 2pin
If you play the keyboard,
/SPOFF:IC4, 5pin
sound will be produced
L H
If the booting procedure stops here, there is a
possibility that the IC below is damaged:
E-BUS
Trun on the panel LED
Main screen will appear
Release MIDI
communication
Connect USB-MIDI
Force Format Mode
Initialize
BackUP Data & Cookie
Clear Registration:
Press the power switch white pressing
Yes
the second highest key (black key).
Initialize
Registration Data
Owner's name
won't appear during
Factory Set
Yes
Initialize
System BackUP
Recover the LCD
brightness parameter
which is set by Function
This will depend on the
connection of Headphones
and the setting of Function