NAD-C420-tun-mod40101 电路图 维修手册.pdf

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1、PAGE 4-01-01 NAD C420 MODIFICATION PROBLEM: When a frequency of 10.25 MHz or higher is stored into preset 3 the unit may change this frequency to 12.8 MHz less after receiving any remote command (102MHz becomes 89.2MHz). This occurs even with other brands remote commands. CAUSE: This is a software b

2、ug. SOLUTION: There are two possible solutions for this fault: The best solution is to replace the CPU, this will keep the partnumber mentioned in the service manual: LC866448B (U201) The fast solution is to disable the IR receiver, this is only possible if you are 100% certain the customer will not use this function. It is advisable to perform this modification whenever a unit comes in for service. PRODUCTION: The new CPU will be installed from serial: G0XC42003201 RadioFans.CN 收音机爱 好者资料库