Marantz-SR7400-avr-mz04059 电路图 维修手册.pdf

100 Corporate Drive Mahwah, NJ 07430 Service Bulletin No. : MZ04-059 Date: January 17, 2007 _ Model: SR7400 Subject: Noise from SURROUND L/R Speakers. Symptom: The symptom appears when the unit is turned on 5-seconds or more after being in the standby state and after the speaker relay turns on and 2 seconds or more pass. During PCM input from a CD Noise can be heard from Surround L/R speakers just before CD Playback begins. Note: This phenomenon occurs only when the Surround L/R speaker Delay time is extended. Solution: 1. Update the CPU (IC28) firmware version to “V040218_2”. 2. Update the DSP (IC20) firmware DSP CODE ID. DSP CODE ID after change is as follows: CD01 02060104 CD02 02010116 CD03 02060206 CD04 02040113 CD05 02030306 CD06 02030114 CD07 02030211 CD08 02020206 CD09 02050211 CD0A 0205030A CD0B 0205040D CD0C 02050510 CD0D 02050110 CD0E 02050603 CD0F 00000000 CD10 00000000 CD11 00000000 CD12 00000000 CD13 00000000 CD14 00000000 3. Please refer to the SR7400 service manual pages 58 to 62 for “10.SERVICE MODE” and “12.UPDATA FIRMWARE” details. 4. Update the firmware using the following files: SR7400_CPU_V040218_2.zip, SR7400_DSP_040518.zip _ 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 Attention: Please copy the files onto your PC and unzip them before using. Parts: Ref# Description Part Number NA CPU and DSP Program Disc 90M-SR7400CD3 Serial Number Range: This improvement has been done in production from the service code MZ04 and after. _ 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