Yamaha RX-V681, Service Manual

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RX-V681/RX-A760
RX-V681/RX-A7
60
■
UPDATING FIRMWARE
When the following parts are replaced, the firmware must be updated to the latest version.
DIGITAL P.C.B.
FPGA Flash ROM: IC86 on DIGITAL (1) P.C.B.
DSP1 Flash ROM: IC926 on DIGITAL (1) P.C.B.
DSP2 Flash ROM: IC930 on DIGITAL (1) P.C.B.
NETWORK MODULE
●
Confirmation of firmware version and checksum
Before and after updating the firmware, check the firmware version and checksum by using the self-diagnostic func-
tion menu.
Start up the self-diagnostic function and select
“
S4. ROM VERSION/CHECKSUM
”
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 again.
●
Initializing the back-up IC (EEPROM: IC82 on DIGITAL P.C.B.)
After updating the firmware, the back-up IC MUST be initialized by the following procedure to store the setting infor-
mation (soundfield parameters, system memory and tuner presetting, etc.) properly.
Start up the self-diagnostic function and select
“
S3. FACTORY PRESET
”
menu.
(For details, refer to
“
SELF-DIAGNOSTIC FUNCTION
”
)
Select
“
PRESET RSRV
”
, press the
“
MAIN ZONE
z
”
key to turn off the power once and turn on the power again. Then
the back-up IC is initialized.
●
Required Tools
• USB storage device
• Latest firmware
Download the latest firmware from the specified download source to the PC.
And then, copy the firmware to the root folder of the USB storage device.
If the firmware is copied to a subfolder of the USB storage device, the update will not proceed.