| 摘要 |
<p>PURPOSE:To prevent a reserved broadcast from overlooking by selecting a channel of a television broadcast set by the timer reservation in place of an external video input display when the timer reservation is inputted in the external video input display state. CONSTITUTION:A switching means for switching an external input video signal and a television broadcast signal is controlled by a switching signal transmitted from a control circuit 20. The control circuit 20 has a CPU21, a ROM22, a RAM23 and an I/O port 24, a remote control signal from a command is inputted from an input port of an I/O port 24 and keys 28, 29 in a receiver main body are connected. In order to supply a synchronizing pulse to a clock timer of the CPU21, a commercial AC signal from a commercial C source 37 is fed to a pulsing circuit 38, from which a power supply synchronizing pulse is formed.</p> |
