| 摘要 |
PURPOSE:To assure the clear reproduction for only the preferential reproduced sound, by incorporating a device capable of recroding and reproduction plus a device capable of reproduction into a housing and providing a control circuit which gives the muting to the reproduced output of either one of the two devices mentioned above as well as to deliver the reproduced output of the other device. CONSTITUTION:When a reproduction switch 7 is turned on at an exclusive reporduction part A, a transistor (TR)29 is turned off. Thus no difference of potential exists between the base and the emitter of a TR32 to turn off the TR32. As a result, a muting TR3 is turned off, and the output of a reproducing amplifier 2 is delivered from a line amplifier. Then a reproduction switch 15 is turned on at a recording/reproducing part B when the switch 7 is on. Thus a TR19 is turned on, and a resistance 35 is connected in parallel to a resistance 28. As a result, the TR29 and TR32 are turned on to turn on the muting TR3. On the other hand, the TR23 and TR26 are turned off to turn off a muting TR11. Then the signal supplied from a reproducing amplifier 10 is delivered to a line amplifier 6. |
