Denon AVR-1708, AVR-1508, AVR-688, AVR-588, AVR-488 Service Bulletin

100 Corporate Drive Mahwah, NJ 07430

Service Bulletin

No. : OST-C1500

Date: July 23, 2009

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Model: AVR-1508, AVR-588, AVR-488, AVR-1708, AVR-688, AVR-1609,

AVR-589, AVR-1709

Subject: Countermeasure for "HDMI P.W.B. UNIT" issues. Countermeasure is applicable only upon claim from the customer. This countermeasure is not intended and need not be applied to stock units.

Symptom: 1) In the DSP processing mode, the noise occurs from the speaker.

2)In the DSP processing mode, the audio signal is not output from the speaker.

3)In the DSP processing mode, the noise is output, and the audio signal is not output afterwards.

4)When the HDMI input is used, the video signal is not output.

Solution: Countermeasure is applicable only upon claim from the customer. MODIFICATION: Please modify the defective unit when the symptom is not improved after you pull out and insert the "HDMI P.W.B. UNIT" as outlined in service bulletin OST-C1375.

5-1: AVR-1508/1708/488/588/688

1)Remove the Top cover.

2)Remove the "HDMI P.W.B. UNIT".

3)Connect between 4 pin of CP904 on "HDMI P.W.B. UNIT" and JP373 on "2CH AMP P.W.B. UNIT" with a 24 ga. wire (nsp, L=15cm, AWG24 UL1430).

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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.

______________________________________________________________________________________

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.

4) Insert the "HDMI P.W.B. UNIT", and fix the screws with the Back panel and

Top cover.

5-2: AVR-589

1)Remove the Top cover.

2)Remove the "HDMI P.W.B. UNIT".

3)Remove the shield plate.

4)Connect between 4 pin of CN904 on "HDMI P.W.B. UNIT" and JP1008 on "D-

VIDEO P.W.B. UNIT" with a 24 ga. wire (nsp, L=15cm, AWG24 UL1430)

______________________________________________________________________________________

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.