NAD-C420-tun-st1 维修电路原理图.pdf

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1、PAGE 1-01-01 Service Tip C420Preset memory circuit changePROBLEM: When a frequency of 102.5MHz or higher is stored into preset 3the unit may change this frequency to 12.8MHz less after receiving anyremote command (102.5MHz becomes 89.2MHz). This occurs even with otherbrands remote commands.CAUSE: Th

2、is is a software bug.SOLUTION: The solution is to replace the CPU, this will keep the partnumber mentioned in the service manual: LC866448B (201).PRODUCTION:This modification has been implemented in production from serial number: G0XC42003201Contact:NAD Electronics International633 Granite CourtPickering, ON Canada L1K 3K1Voice: 905-831-0799 FAX 905-837-6357 NADwww.NADRadioFans.CN 收音机爱 好者资料库