Onkyo TXSR-803 Service manual
CONFIDENTIAL
Technical Tip
18 Park Way, Upper Saddle River, NJ 07458
Date: April 6, 2006
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Model: TX-SR803/SR703, DTR-4.6/5.6/6.6/7.6
Subject: High pitched noise is heard in the subwoofer.
Symptom: A high pitched noise or, a motorboat noise can be heard when using the
Optical, Coaxial or HDMI input.
Solution: If the DSP board (U03) is marked NADG-8660-1 (see board version
pictures) modify the DSP board as follows:
Add R149 47 ohm and delete R175. Add PVC wire
(Relocate resistor R175 (47ohm) to location R149. and add pvc wire as 2nd picture
show . )
______________________________________________________________________________________
This document and the information it contains is intended for the exclusive use of Authorized ONKYO Service Centers and their
employees. This document may contain information that is privileged, confidential and exempt from disclosure under applicable law
and terms of the ONKYO Service Agreement. Any dissemination, distribution or copying of this document and the information it
contains is strictly prohibited.
CONFIDENTIALITY NOTICE:
Add a jumper wire to foil side of board between the ground legs of C432 and C442.
______________________________________________________________________________________
This document and the information it contains is intended for the exclusive use of Authorized ONKYO Service Centers and their
employees. This document may contain information that is privileged, confidential and exempt from disclosure under applicable law
and terms of the ONKYO Service Agreement. Any dissemination, distribution or copying of this document and the information it
contains is strictly prohibited.
CONFIDENTIALITY NOTICE:
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