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问:有一台双卡录音机在放音时,总是一边喇叭声大,另一边喇叭声小,用两个带仓放音都一样,经检查磁头无问题。录音机的前置放大器使用一块TA7668AP集成电路,从它的⑩脚处注入信号时扬声器无反应,(15)脚无1V的电压,请问,该集成块是否损坏?答:检查这种故障时,可从后级逐渐往前级推进,如磁头(包括磁头连线及相应的转换开关等)无问题,可从功放级的L、R输入端分别注入音频信号,如果发声正常,再从前置级TA7668AP的输出端④脚与(13)脚处注入音频信号,如发声正常,再从它的⑦脚与⑩脚注入音频信号,
Q: There is a dual card recorder in the playback, always a loud speaker on the other side of the horn is small, with two tape positions are the same, after checking the head no problem. The front of the recorder uses a TA7668AP integrated circuit, the speaker from the ⑩ feet when the signal is no response, (15) feet no voltage of 1V, may I ask, whether the manifold is damaged? A: check this fault can be From the rear gradually advance to advance, such as head (including the head connection and the corresponding switch, etc.) no problem, from the L, R amplifier input level were injected into the audio signal, if the sound is normal, TA7668AP output pin ④ and (13) feet into the audio signal, such as normal sound, and then from its ⑦ feet and ⑩ feet into the audio signal,