Yamaha RX-V765 Owner's Manual page 100

Firmware Update Procedure for RX-V465/565/665/765
STEP3 Plug the AC power cable of the CD/DVD player to the wall outlet.
Insert the Firmware Update CD (Audio CD) into the CD/DVD player
and close the tray.
If the disc begins to play automatically, press STOP button on the
CD/DVD player.
STEP4 ENTER FIRMWARE UPDATE MODE
While pressing the "STRAIGHT" key on the front panel of the AV
receiver, connect the power cable of this unit to the AC outlet.
The firmware update mode is activated and "CDDA UPGRADER" is
displayed.
STEP5 START FIRMWARE UPDATE
Press the "PLAY" key of the CD/DVD player.
Then, writing of the firmware is started. "Found Header" will appear
for few seconds.
While update is in progress,
pressing the buttons or switching off the power.
If an unintended failure occurs, you may start the update process
again from the beginning. Or see IN CASE OF ERROR on the last
page to recover.
STEP6 When writing of the firmware is completed, "Update Success",
"Please..." and "Power off!!" are displayed repeatedly.
STEP7 Stop the DVD/CD player, remove update disc and power off.
STEP8 Turn off the power of AV receiver.
STEP9 CHECK UPDATED VERSION
Press and hold the [STRAIGHT] button on the front panel and keep it
pressed while you press the [STANDBY/ON] button. Once the front
panel displays "Advance Setup", release the [STRAIGHT] button.
Then, press and hold the [TONE CONTROL] button for about 3
seconds until front panel displays
If your firmware version number and checksum don't match, retry from
step 2. Or try the IN CASE OF ERROR method on the last page.
STEP10 Turn off the power of AV receiver.
Congratulations!
You have completed the firmware update. Your AV receiver is ready for normal
use.
DO NOT interrupt the AV receiver by
"M:K032 8FFD"
K032: version of firmware
8FFD: checksum
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