Denon DVD-5900 Service Bulletin OST-810

100 Corporate Drive Mahwah, NJ 07430

Service Bulletin

No. : OST-810
Date:

May 15, 2007

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Model: DVD-5900

Subject: Countermeasure for the malfunction upon playing back particular

discs.

Symptom: Occasionally the unit indicates "NO DISC" only when loading the

following type number CDDA manufactured by Shefield.

1) MDMS System Conditioning Disc (Part Number: SHEFIELD LAB SCD-081­0094 G1 960420)

2) XLD test and burn in (SHEFIELD LAB 10041-2 SCD-081-0016 942704 SRC

01)

Solution:

when the malfunction due to the above disc(s) was reported. (This excludes units

to be refurbished (FT) or repaired due to other reasons.)

Please apply the following modification to your customer's unit only

Modification Procedure:

(1) Removing the MECHA Unit
(2) Removing the MAIN P. W. B.
(3) Replacement of the resistor
(4) Installing the MAIN P. W. B.
(5) Installing the MECHA Unit
(6) Confirming the actual operation.

(1) Remove the MECHA Unit from the unit. (Refer to the Service Manual, pages
4 ~ 5.)
(2) Remove the MAIN P. W. Board (GU-3512) from the MECHA Unit. (Refer to
the Service Manual page 10.)

______________________________________________________________________________________

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:

(3) Refer to the following attached Photo, and replace R593 47kΩ chip type
resistor with 22kΩ chip type resistor.

• The P. W. Board has to be removed since the chip type resistor has been
attached on the upper surface of the Board.

(4) Install the MAIN PWB (GU-3512) on the MECHA Unit. (Refer to the Service
Manual, page 10.)
(5) Install the MECHA Unit on the unit. (Refer to the Service Manual, pages 4 ~

5.)
(6) Confirming the actual operation:
Reproduce CDDA (TCD784, etc.), DVD-S (TDV520A, etc.) and DVD-D
(TDV540A, etc.), and confirm that the sound and the image output properly.

Parts:

Ref #

FORMER NEW

Description Part Number Description Part Number

R539 47kΩ 247 3012 940 22kΩ 247 2010 969

______________________________________________________________________________________

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: