DENON Service Bulletin OST-C1528 free download

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100 Corporate Drive Mahwah, NJ 07430 Service Bulletin No. : OST-C1528 Date: July 1, 2009 _____________________________________________________________ Model: POA-A1HDCI Subject: Change the voltage of power supply for OP amplifier. Countermeasure is applicable only upon claim from the customer. Symptom: The unit goes into protection mode. Solution: Generally OP amplifier is not defective at "+18/-18 volts" power supply, but few OP amplifiers was damaged by over "+15/-15 volts". COUNTERMEASURE: We pulled down the voltage of the power supply from "+18/-18 volts" to "+15/-15 volts". 1) 1U-3798-1 AMP UNIT: a) IC102, IC103: SA5532ADR (00D2623555901)NJM5532M-D (TE- 1)(00D2630898907) b) ZD101, ZD102: HZS22-1 (00D2760480900)HZS20-1TD (00D2760479908) 2) 1U-3798-2 INPUT UNIT: a) JV39, JV42, JV58: Jumper WireHZS3B-2TD (00D2760453911) See the following picture for details. ______________________________________________________________________________________ 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. b) Cut the pattern of minus line in IC104. c) Solder the diode HZS3B-2 to the PCB with a RUBBER SHEET under the component (on PC board). d) IC101, IC104: SA5532ADR (00D2623555901)SE5532AD8R2G (232810020503S) 3) 1U-3797-3/4/5/6/7 CONNECT UNIT: a) IC511, IC512, IC513, IC514, IC515: SA5532ADR (00D2623555901)SE5532AD8R2G (232810020503S) ______________________________________________________________________________________ CONFIDENTIALITY NOTICE: The information c