Denon DVD-3910 Service Bulletin OST-F1186

100 Corporate Drive Mahwah, NJ 07430

Service Bulletin

No. : OST-F1186
Date: June 27, 2007

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Model: DVD3910

Subject: Change in the P. W. Board .

Symptom: The GU-3613-1 SYSTEM UNIT and GU-3614-3 AUDIO UNIT have

been changed on the referenced model in order to improve manufacturing
issues. According to this change, we will inform you of the combination of the
new P. W. Board with old P. W. Board upon using, and the service parts to be
used for the new P. W. Boards.

1) The production of the above P. W. Boards will be switched to new Boards
simultaneously. Therefore, at the field, the new P. W. Board may be mixed and
used together with the old P. W. Board upon maintenance service. In such a
case, an additional modification is necessary to use new P. W. Board with old P.
W. Board.

2) We have summarized the contents of modifications of the P. W. Boards for
each combination. Therefore, please apply the modification according to the
following pages upon combination of the old P. W. B. with new P. W. B.

Solution:

HOW TO CONFIRM THE PRINTING BOARD:

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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:

1) GU-3613-1 SYSTEM UNIT

2) GU-3614-3 AUDIO UNIT

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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.