Denon avr-4308ci ost-f1494 サービスマニュアル

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3) While holding the "△" and "▽" buttons (SYSTEM CONTROL) down 
simultaneously, turn the "Power switch" on.   
4) The FL Display indicates all digits at a one second interval.   
5) Turn off the "Power switch" of the unit. 
 
Updating the firmware (Refer to the Instruction Manual.)  
1) Turn the Power Supply of the unit off.  
2) Connect the Ethernet terminal of the unit to the Network line by Ethernet 
straight cable. (Don't use Ethernet cross cable.)   
3) The connection of the network recommends the Ethernet cable for certain 
update (do not use a wireless connection).   
4) Turn the Power Supply of the unit on.  
5) The unit sets the Internet. It wishes waiting for about two minutes until 
customer's router ends the setting. 
 
The update doesn't succeed when the customer's set cannot correctly hook up to 
the Internet. In this case, please confirm the internet environment of the customer 
house. Check to see if the customers set can receive internet radio. There are 
some problems under the internet environment when the Internet radio can not 
be received. 
 
6) Press "MENU" button on the front panel and indicates the GUI menu.  
7) Press "CURSOR" button.  
8) The GUI indicates, "MANUAL SETUP" > "OPTION SETUP" > "Firmware 
Update
". 
Caution: 
 The update interrupts when it is not possible to connect it with the 
Internet correctly. In this case, please do from 1) again.