Yamaha ACD1 Service Manual page 74

ACD1
d) Writing VNP1 fi rmware
Firmware is written on the VNP1 which is an Ethernet controller. If the fi rmware is not written, the Ethernet cannot be used normally.
The version is detected automatically when the power is turned on and the fi rmware will be written automatically if it should be
written. Firmware needs writing only once.
1. Timing for writing VNP1 fi rmware
Firmware is written on the VNP1 in the following cases:
• In an old version is written on the VNP1.
The VNP1 fi rmware is written in the IC108 in the ENT2 circuit board.
If the ENT2 circuit board is replaced with the one containing old version data, the VNP1 fi rmware will be written when the power
is turned on for the fi rst time.
• If the program section is updated
New VNP1 fi rmware is contained in the program section. If the updating of the program section causes the necessity of updating
VNP1 fi rmware, fi rmware will be written on the VNP1.
2. Execution and confi rmation
If the VNP1 needs writing of fi rmware, it detects and starts writing automatically. The writing will be executed in the following
way.
1. The following indication will appear during writing. It takes about 30 seconds for writing. Do not turn off the power during
writing.
2. When the writing is completed, the indication for writing will disappear and the ACD1 will start in normal mode.
3. If the hardware has some problem and there is some error in the communication of the CPU and VNP1, an error message will
appear after the normal startup.
74
Updating f/ware
Do not turn off!
[Example of the ACD1 LCD display]
YAMAHA ACD1
000:
[Example of the ACD1 LCD display]
Network HW Error
[Example of the ACD1 LCD display]