爱华组合音响NX—Z1200、Z9100等采用QD2518Q和CXD1167Q芯片改VCD后,按一般的改机方法利用本机功放放音时无声,这是因为该机内设多层静噪电路所致。其解决办法是将IC502的(15)、(16)脚上端的跨接线VF—A、VF—B断开。但在放CD时暂停、选曲、进出盒均产生刺耳的噪声。为了克服改机后的噪声,通过控制VF—A、VF—B这两条跨接线在电路中的通断可以彻底解决改机噪声。这样,只有在放VCD时VF—A、VF—B才断开,其他工作状态时,原 Epworth combination of audio NX-Z1200, Z9100 using QD2518Q and CXD1167Q chip change VCD, according to the general method of change machine to use this machine amp playback soundless, it is because the machine is due to multi-layer mute circuit. The solution is to disconnect the jumpers VF-A and VF-B at the upper ends of (15) and (16) of the IC502. However, pause while playing CD, selections, out of the box have harsh noise. In order to overcome the noise after the machine is changed, by controlling the VF-A, VF-B these two jumpers in the circuit can completely solve the machine off noise. In this way, only in the VCD when VF-A, VF-B was disconnected, the other working conditions, the original