Denon DHT-391XP Service Manual page 26

(32) Set the switch of "Writing Kit" (Refer to the table below).
DSPBOOT CE
H H
(33) Press the "RESET" switch of "Writing Kit".
(34) Initializing.
1. Turn off the power using ON/STANDBY button.
2. Press ON/STANDBY button while simultaneously pressing SURROUND MODE 0 and SURROUND MODE 1
buttons.
3. Check that the entire display is flashing with an interval of about 1 second, and release your fingers from the 2
buttons and the microprocessor will be initialized.
Note: •If step 3 does not work, start over from step 1.
• All user settings will be lost and this factory setting will be recovered when this initialization mode.
So make sure to memorize your setting for restoring after the initialization.
3. Notice:
Please keep the following notice for firmware update.
(a) Keep the PC environment
(b) Avoid the communication cable from the electrical noise source.
(e.g. telephone cable, AC line, a fluorescent light)
(c) Don't remove cable during update.
(d) Don't turn off the power during update.
(e) Don't run other PC application during update.
(f) Stop the resident program on PC (Virus checker and System check utilitu, etc)
(g) Stop the screen saver on PC.
(h) Stop the power save ability on PC.
(i) In case of laptop PC, Use the AC adaptor.
Confirming the firmware's number after upgraded
After completion of the updating operation, the new version number can confirmed by starting up the AVR1311 or AVR391
according to the following procedure.
With the following operation, the AVR1311 or AVR391 can be set to the Flash ROM Version-Number Confiemation mode.
Turn on power switch while simultaneously pressing "DIMMER" and "STATUS" buttons on the front panel. Every time the
"STATUS" button is pressed, version number of the Model, Main, DSP, ... are indicated on the front panel section in the
following order.
Depression
1
2
3
EPM CNVSS
H H
Button Name
STATUS Model Name
STATUS Main CPU
STATUS DSP ROM
Remarks
AVR1311 or AVR391 **
Main: **.**
DSP.*.*.*
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