| 摘要 |
PURPOSE:To reduce the cost, reduce the power loss and improve the voltage precision of a unified apparatus of a TV and a VTR. CONSTITUTION:A DC voltage is turned on and off by a switching device and a power is supplied to a TV circuit 30, a VTR circuit 27 and a remote control circuit 34. First and second error signal generating circuits 50 and 71 are connected to a common light emitting diode 12 for power control and the light emitting diode 12 is grounded through a transistor 40. One light emitting diode 12 is shared by three modes, the construction can be simplified. |
