Denon avr-5308ci ost-c1326 Service Manual
100 Corporate Drive Mahwah, NJ 07430
Service Bulletin
No. :
OST-C1326
Date:
May 28, 2008
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Model:
AVR-5308CI
Subject:
Very small humming noise occurs from Headphones.
This countermeasure is applicable only upon claim from the customer.
Symptom:
The connecting wires for the headphone GND and analog audio
GND was far from the headphone circuit and it existed in the microcomputer
substrate. The cause is a loop of the GND pattern.
substrate. The cause is a loop of the GND pattern.
Solution:
The hum noise has been decreased by lowering the potential of
GND of the headphones.
MODIFICATION: 5-1. 1U-3821-1 CPU UNIT
1) The 2 pins of CY152 are cut.
MODIFICATION: 5-1. 1U-3821-1 CPU UNIT
1) The 2 pins of CY152 are cut.
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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.
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.