Marantz-SA8003-sacd-mz09005 电路图 维修手册.pdf

100 Corporate Drive Mahwah, NJ 07430 Service Bulletin No. : MZ09-005 Date: August 4, 2009 _ Model: SA8003 Subject: Remote Control Performance Improvement Symptom: When the unit receives remote control codes (from another model) during standby and the AC power supply voltage is reduced for 6% or more, the LED gets dim and the relay may turn on and off one time. Cause: When the microprocessor receives remote control codes during standby, it shifts from Low Speed mode to High Speed mode and starts analyzing remote control codes. The analysis takes approximately one second only, but while this is happening, the voltage of the standby power supply is gradually reduced until the voltage of the microprocessor power supply falls below that of the reset power supply, and thereby the reset is activated. This phenomenon occurs when the voltage is reduced for 6% or more. Solution: The input of the microprocessor regulator has a built-in circuit that lowers the voltage during standby. The fixed voltage number of this circuit should be changed to be capable of guaranteeing normal function at the 15% reduced voltage. _ CONFIDENTIALITY NOTICE: The information contained in this document is intended for the exclusive use by MARANTZ 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 MARANTZ Service Agreement. Any distribution, disclosure, dissemination or copying of this document and the information it contains is prohibited. No responsibility will be accepted by MARANTZ for any damage, injury or loss resulting from the misuse of the information contained in this document. RadioFans.CN 收音机爱 好者资料库 Parts: FORMER NEW Ref # Description Part Number Description Part Number RH10 1.5K OHM 00D2412398997820 OHM 00MGD05821160 Serial Number Range: Applies to xxxx0852xxxxxx and earlier. Note: This improvement has already been done in production from serial number xxxx0901xxxxxx and later. _ CONFIDENTIALITY NOTICE: The information contained in this document is intended for the exclusive use by MARANTZ 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 MARANTZ Service Agreement. Any distribution, disclosure, dissemination or copying of this document and the information it contains is prohibited. No responsibility will be accepted by MARANTZ for any damage, injury or loss resulting from the misuse of the information contained in this document. RadioFans.CN 收音机爱 好者资料库