Kenwood DDX3021 Service Manual page 28

4.2.6 FIRM UPDATE MODE selection screen
[BACK] key: Goes back to the SERVICE MODE
(1) [SYSCOM] key
Perform Update when a USB device containing the Update
data is inserted.
• Select a USB source before moving to the service mode.
• Beep sound is output while Update is in progress and
when it is complete, so make sure a speaker is connect-
ed.
<Display during Update (Image)>
• Output beep sound at regular intervals while Update is in
progress
<Update Complete Display (Image)>
*Do not renew display after Update is complete. Alter the
interval of beep sound to notify its completion.
*Press the Reset button after Update is complete to return
to normal operation
(2) [APPCOM] key
Perform Update when a USB device containing the Update
data is inserted.
*Select a USB source before moving to the service mode.
<Display during Update (Image)>
<Update Complete Display (Image)>
(3) [Bluetooth] key
• When a BT dongle is inserted in the Telechips USB ter-
minal or when nothing is inserted →No transition of op-
eration.
• When a USB memory is inserted in the Telechips USB
terminal→Transit to the following screen, send [Play] key
to the address USB, and allow reading of fi les in the USB
memory.
[BACK] key: invalid
• If update information (Update file in the ROOT folder)
command is received, control thereafter follows the
specifications of the module.
• If USB fi le information command is received, it is consid-
ered that Update data was not acknowledged and the fol-
lowing screen is displayed.
• Or, the same screen is displayed when update informa-
tion (update error) is received.
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