Denon DVD-2910, DVD-3910, DVD-955 Service Bulletin OST-F1556

100 Corporate Drive Mahwah, NJ 07430

Service Bulletin

No. : OST-F1556 Date: August 10, 2009

_____________________________________________________________

Model: DVD-2910, DVD-955, DVD-3910

Subject: Correction of the Firmware.

Countermeasure is applicable only upon claim from the customer.

Symptom: 1) A specific DVD disc "Miyuki Utatabi Nakashima concert tour

2007" cannot be correctly reproduced.

2) Sound breaks off in specific DVD disc (MoRA/Ringo Shiina) [TOBF-5601]. And elapsed time becomes discontinuous.

Solution:

occurs.

We improved the software in the Back-end so that no malfunction

MODIFICATION: Record the supplied file onto a blank CD-R separately and individually, and update the firmware in the Back-end on your customer's unit upon refurbishment of the unit and/or claim.

Cautions: 1) When recording the file(s) on a blank CD-R, the format shall be

"ISO9660" and the session shall be "CLOSE".

______________________________________________________________________________________

The information contained in this document is intended for the exclusive use by DENON Authorized Service Centers and their employees. This document may contain information that is privileged, confidential and may be protected from disclosure under applicable laws and terms of the DENON Service Agreement. Any distribution, disclosure, dissemination or copying of this document and the information it contains is prohibited. No responsibility will be accepted by DENON for any damage, injury or loss resulting from the misuse of the information contained in this document.

CONFIDENTIALITY NOTICE:

2) When recording the program file on the CD-R, please record it at the 4-times speed of the normal speed.

3) When the 4-times speed is not available, please record it at the minimum speed that is available in your machine.

4) If the file was recorded at a high speed, such as 32 or 48 times speed of the normal speed, the upgrading may fail due to the data incorrectly recorded on the CD-R.

Program files to be supplied at this time:

1) For the DVD-2910 and DVD-955 : Name of the File: d21zsavd.cfw Version: GEN8258-5/MAKE DAY 710

2) For the DVD-3910 equipped with the 2nd or 3rd Edition of DENON Link (1) DVD-3910 equipped with the 2nd Edition of DENON Link: Name of the File: d31zsavd.cfw Version: GEN8257-6/MAKE DAY 710

(2) DVD-3910 equipped with the 3rd Edition of DENON Link: Name of the File: d31zsavd.cfw Version: GEN8257-6/MAKE DAY 710D

Cautions: In the case of model DVD-3910, the contents of the program files differ

though their names are the same. Therefore, please do not apply the program file for the 3rd Edition DENON Link to the unit that is equipped with the 2nd Edition, and the program file for the 2nd Edition of DENON Link to the unit equipped with the 3rd Edition. If you rewrote the unit by mistake, rewrite the unit again using the correct program file.

How to identify the unit to which the 2nd or 3rd Edition of DENON Link has been applied: Please confirm the version of the DENON Link at the SETUP of the unit according to the following procedures.

1) Switch the Power of the unit on, and press the "SETUP" button so that the SETUP OSD is displayed.

2) Adjust the cursor to the item of DENON Link in the DIGITAL INTERFACE SETUP.

3) If the items of the DENON Link are "OFF" and "2nd" only, the unit is conforming to the 2nd Edition of the DENON Link. If the items are "OFF", "2nd" and "3rd", then the unit is conforming to the 3rd Edition.

______________________________________________________________________________________

CONFIDENTIALITY NOTICE:

The Update Procedures: SYSTEM MICON

1) Updating the System MICON on the DVD-3910: (DVD-3910 only) (1) Connect the Video Output Terminal (VIDEO OUT or S-VIDEO OUT) of the unit to a TV. (2) Switch the Power of the unit on. Press the "OPEN/CLOSE" button and open the Disc Tray. (3) Put the CD-R (Ver.6767-5) for rewriting the System MICON on the Disc Tray and press the "OPEN/CLOSE" button. (4) The Disc Tray closes and the update of the software is performed automatically. (5) After indicating "LOADING" on the FL Display, the Power of the unit is turned off once, and is turned on again. (6) After "WRITING" is indicated on the FL Display, "COMPLETE" is indicated. (7) After the indication of the "COMPLETE", the Disc Tray opens automatically upon completion of the rewriting operation. Take out the Disc from the Disc Tray. (8) Turn the Power switch of the unit off once.

IEEE 1394 ROM

2) Updating the IEEE1394 ROM, (DVD-3910 only): (1) Connect the Video Output Terminal (VIDEO OUT or S-VIDEO OUT) of the unit to a TV. (2) Turn on the Power switch of the unit. Press the "OPEN/CLOSE" button and open the Disc Tray. (3) Set the CD-R (Ver.ER1028 [20041028]) for rewriting the IEEE1394 to the Disc Tray, and press "OPEN/CLOSE" button. (4) The FL Display indicates "LOADING". Then, "STOP", "UPDATE", "ERASE", "WRITING", "COMPLETE" are indicated. (5) After indicating "COMPLETE" on the FL Display, the Disc Tray opens automatically upon completion of the rewriting operation. Take out the Disc from the Disc Tray. (6) Turn off the Power switch of the unit once.

ESS BACK-END ROM

3) Updating the Back-end ROM, (DVD-2910, 955 only): (1) Connect the Video Output Terminal (VIDEO OUT or S-VIDEO OUT) of the unit to a TV. (2) Turn on the Power switch of the unit. Press the "OPEN/CLOSE" button and open the Disc Tray. (3) Put the CD-R for rewriting the Back-end on the Disc Tray, and press the "OPEN/CLOSE" button. (4) The Disc Tray closes, the FL Display indicates "LOADING" and update of the software is performed automatically.

______________________________________________________________________________________

CONFIDENTIALITY NOTICE:

+ 5 hidden pages