Marantz-SR5600-avr-mz07US04 电路图 维修手册.pdf

100 Corporate Drive Mahwah, NJ 07430 Service Bulletin No. : MZ07-US04 Date: June 5, 2007 _ Model: SR5600 Subject: Troubleshooting the “CHECK POW 5” indication. Symptom: The set shows a “CHECK POW 5” indication but the troubleshooting information in the service manual is vague. Solution: Use the following to troubleshoot the CHECK POW 5 failure: Troubleshooting the +5V Supply If +5V input into pin 108 of IC28 is troubled check the following the checkpoints (1 4). CHECKPOINTS: 1. Turn the power-ON. Is there +5V volts on CN30/pin 7 and CN30/pin 8 of the DSP PWB. 2. (Power Amp Failure) Is the signal on pin 31of IC28 = H? (When 31pin is in a L state for 2 seconds or longer, Abnormalities have occurred in the POWER AMP circuit.) 3. (Power line Failure) Is the signal on pin 109 of IC28 = H? (When pin109 is in a L state for 2 seconds or longer, Abnormalities have occurred to +/-12V power supply or the Power Amps power supply.) 4. (Power Down) Is the signal on pin 38 of IC28 = H? (When 38 pin is in a L state for 2 seconds or longer, Abnormalities have occurred in IC84 and around IC84 circuit of STANDBY PWB.) _ 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