Updating Firmware - Yamaha A-S201 Service Manual

A-S201

■ UPDATING FIRMWARE

When the following parts are replaced, the firmware must be updated to the latest version.
MAIN P.C.B.
Microprocessor: IC203 on FUNCTION (1) P.C.B.
● Confirmation of firmware version and checksum
Before and after updating the firmware, check the firmware version and checksum by using the self-diagnostic
function menu.
Start up the self-diagnostic function and select "1. FIRMWARE VERSION/CHECK SUM" menu.
Using the sub-menu, have the firmware version and checksum displayed, and note them down.
(For details, refer to "SELF-DIAGNOSTIC FUNCTION")
*
When the firmware version is different from written one after updating, perform the updating procedure again from
the beginning.
● Initializing the back-up IC
After updating the firmware, the back-up IC MUST be initialized by the following procedure to store the setting
information properly.
Start up the self-diagnostic function and select "3. FACTORY PRESET" menu.
(For details, refer to "SELF-DIAGNOSTIC FUNCTION")
Select "PRST RSRV", press the " " (Power) key to turn off the power once and turn on the power again. Then the back-
up IC is initialized.
● Required Tools
• Firmware downloader program
................................................................ RFP.exe
• Firmware
................................................. AS_201_xxx.mot
• RS-232C conversion adaptor (Part No.: ZK189200)
• Flexible flat cable
(9 pin 150 mm pitch = 1.25, Part No.: ZD896000)
• USB to Serial converter
* Recommendation: BUFFALO
12
(USB type-A to D-sub 9 pin)
(Part No.: BSUSRC0605BS)
FTDI Ltd.
(Part No.: DS-US232R-10)
● Preparation and precautions
• Download the firmware downloader program and
the latest firmware from the specified download
source to the same folder of the PC.
• Prepare the above specified RS-232C cross cable.
• While writing the firmware, keep the other
application software on the PC closed.
It is also recommended to keep the software on
the task tray closed as well.