System Booting Flowchart - Yamaha Clavinova CVP-405 Service Manual

CVP-405/CVP-405PE/CVP-405PM
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SYSTEM BOOTING FLOWCHART

Power ON
Set CPU Register
Initialize Port
/DACIC = L
/MUTE = L
/SPOFF = L
Initialize Enhancing port
/AVDP-RES = L
/EBUS-RES = L
/TG-RES = L
/LAN-RES = L
Initialize LCD brightness
DA1 = 0
Initialize
BOOT Work RAM
/AVDP-RES = H
/EBUS-RES = H
/TG-RES = H
Initialize
E-BUS driver
(EBUS Start)
If the booting procedure stops here,
there is a possibility that the
following parts are damaged:
• CPU (DM: IC5)
• RAM (DM: IC13, 14)
• E-BUS IC (EIF: IC1)
Opening screen
will appear
Maximum brightness
DA1 = $FF
Installation mode?
No
Communicate with TG-CPU
Get the current version
Transmit program
Transmit data
98
* "Factory Set" refers to the condition of turning on the power after executing "Factory Reset" in the Test Program.
After turning on the power:
L L (*invisible)
After exiting the test program:
H L
DM circuit board
/DACIC : IC4, 10pin
/MUTE : IC4, 8pin
/SPOFF : IC4, 6pin
/AVDP-RES : IC27, 9pin
/EBUS-RES : IC27, 12pin
/TG-RES : IC27, 15pin
/LAN-RES : IC27, 19pin
Screen gets dim
DM circuit board
DA1 : IC5, 238pin
DM circuit board
/AVDP-RES : IC27, 9pin
/EBUS-RES : IC27, 12pin
/TG-RES : IC27, 15pin
Send a message to E-BUS IC
Screen will brighten
Yes
Please insert the
Installer media.
Up date
Main routine
Communicate with
TG via MCI IC
Yes
Is Main Program
defective?
No
Please install the
Peripheral Reset
/DACIC = L
/EBUS-RES = L
/LAN-RES = L
Initialize Work RAM
Cancel peripheral reset
/DACIC = H
/EBUS-RES = H
/LAN-RES = H
Transmit Main Program to RAM
Communicate with TG-CPU
If the booting procedure stops here,
there is a possibility that the
following part is damaged:
• RAM (DM: IC13, 14)
Yes
MAC Address
Writing Mode?
No
Yes
MAC Address
is not written?
No
MAC ADDRESS
Yes
Test Program?
No
Yes
*
Factory Set?
Force Format Mode
No
Send a message to E-BUS IC
Initialize keyboard (E-BUS)
Keyboard input is not accepted yet
Installation failure, etc.
Program error!
program
End
DM circuit board
/DACIC : IC4, 10pin
/EBUS-RES : IC27, 12pin
/LAN-RES : IC27, 19pin
Transmitting to the RAM
(DM: IC13, IC14)
Communicate with TG
via MCI IC (DM: IC303)
INSTRUMENT ID
WRITE MODE
ID Write
routine
Failure in writing
ERROR
End
Test
Test Program
Main routine
A