| 摘要 |
<p>PURPOSE: To suppress useless consumption of battery power in the process of manufacturing VTRs by setting the microcomputer at the service interruption mode when products are in process. CONSTITUTION: When a VTR 10 is under condition of a product in process, the power of battery source 3 is supplied to a power source terminal C2 of a system control microcomputer 5 and an initializing circuit 6. Here, because the output current from the battery source 3 passes a diode D2 and a diode D3, the voltage drop is small and the voltage value of the power source terminal C2, namely, the voltage value of the initializing IC 7 exceeds the value preset at the IC 7. Accordingly the initializing IC 7 switches the initializing signal from the low level to the high level. Because of this, the system control microcomputer 5 detects the voltage value of a voltage detecting terminal C1 after initializing itself. When products are in process, the line power source 2 is not turned on, and the service interruption detecting signal is at 0V, and thereby the system control microcomputer 5 sets the operation mode at the service interruption mode.</p> |
