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100 Corporate Drive Mahwah, NJ 07430

Service Bulletin
No. : OST-F1501
Date: April 10, 2009
_____________________________________________________________

Model: DCD-CX3, RCD-CX1

Subject: Improvement of playability.
Countermeasure is applicable only upon claim from the customer.

Symptom: Improvement of SLED hunting.

Solution: We improved the software in the Back-end so that no malfunction
occurs.
MODIFICATION: We will supply the following program files for updating the
Back-end firmware. Therefore, please record the Folder (includes the firmware)
onto a blank CD-R separately and individually, and update the firmware in the
Back-end on your customer's unit upon claim.

Cautions:
1) When recording the file(s) on a blank CD-R, the format shall be "ISO9660" and
the session shall be "CLOSE".
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.

______________________________________________________________________________________
CONFIDENTIALITY NOTICE:
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.
Update procedures:
Caution: During the update operation, do not turn off the AC Power or do not
change the function of the unit by any means.

1) Turn the Power of the unit on.
2) Press the "OPEN/CLOSE" button to open the Tray.
3) Place the CD-R disc for updating on the Tray.
4) Press the "OPEN/CLOSE" button to close the Tray.
5) The update operation starts, the Display indicates "COMPLETE" upon
completion of the update, and the operation stops after the Tray opened.
6) Turn the Power of the unit off.
7) At the Test Mode, confirm that the Version is the latest one.

Confirmation of the Version:
(1) Turn off the Power switch of the unit once. While holding the "PLAY/PAUSE"
and "STOP OPEN/CLOSE" buttons on the unit down simultaneously, switch the
Power on.
(2) After indicating the "DCD-CX3" or "RCD-CX1"on the FL Display, press the
"SKIP FORWARD" button on the front panel and confirm that the following
firmware versions appear when the button was pressed at the first, the second
and the third times.

1) At the first time: BE 100171
2) At the 2nd time: MAKE 202

Cautions during the rewriting operation:
1) Please do not turn off the Power during the rewriting operation.
2) If the Display continues to indicate "LOADING" without changing into
"COMPLETE" during the rewriting operation, wait longer than 5 minutes after
closing the Disc Tray. Then, turn off the Power of the unit and start the rewriting
operation from the beginning again.

Note: In these models, the replacement Flash ROM on which the above
improved firmware has been recorded is not available. Therefore, please be sure
to rewrite the BE ROM after replacing the Flash ROM.

Parts:

The program files to be supplied:

______________________________________________________________________________________
CONFIDENTIALITY NOTICE:
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.
Serial Number Range:
We will apply the above modification to the production models beginning from the
following serial numbers. (Last 5 digits)

DCD-CX3 00401 ~
RCD-CX1 00201 ~

______________________________________________________________________________________
CONFIDENTIALITY NOTICE:
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.