System Booting Flowchart - Yamaha PSR-S710 Service Manual

PSR-S710/PSR-S910

SYSTEM BOOTING FLOWCHART

• PSR-S710
Power ON
Set CPU
Port Register
Port initial setting
/DACIC = L (IC7 6 pin)
/MUTE = L (IC7 4 pin)
/SPOFF = L (IC7 2 pin)
Initialize Enhancing port
/SWP-IC = L (IC11 10 pin)
/LAN-IC = L (IC11 15 pin)
Initialize BOOT SDRAM
/SWP-IC = H (IC11 10 pin)
Initialize E-BUS driver
(EBUS Start)
Opening screen
will appear
If the booting procedure stops here,
there is a possibility that the following
parts are defective.
• CPU (IC3)
• SDRAM (IC2, IC6)
• SWP51 (IC304)
Installation mode?
No
Is Main Program
defective?
No
* "After executing Factory Set" refers to the condition when the power is turned on after executing "Factory Set"
in the Test Program.
72
After turning on the power:
LgL (*invisible)
After exiting the test program:
HgL
Send a message to
SWP51 (IC304)
Yes
Please insert the
Installer media.
Upgrade Routine
Installation
Yes
failure, etc.
Program error!
Please install the
pogram
END
Peripheral ICs Reset
/SWP-IC = L (IC11 10 pin)
Initialize MAIN SDRAM
Release peripheral reset
/DACIC = H (IC7 6 pin)
/SWP-IC = H (IC11 10 pin)
/LAN-IC = H (IC11 15 pin)
Transmit Main Program and Transmitting to the SDRAM
Voice Parameter to SDRAM (IC2, IC6)
If the booting procedure stops here,
there is a possibility that the following
parts are defective.
• SDRAM (IC2, IC6)
• Backup Flash ROM (IC20)
Yes
MAC Address
Writing Mode?
No
Exchange the DML circuit board
No
MAC Address
is not written?
Yes
MAC Address
writing error.
Exchange the DML circuit board
Yes
Test Program Mode?
No
Yes
Factory Set executed? *
No
Force Format Mode
Send a message to
SWP51 (IC304)
Initialize keyboard (E-BUS)
Keyboard input is not
accepted yet
INSTRUMENT ID
WRITE MODE
MAC ADDRESS
ERROR
Proceed the Test Program.
Test Program Routine
After exiting the test program,
return to start.
A