| 摘要 |
<p>PURPOSE:To simplify the adjusting work by allowing the adjustment of a video tape prescribed feeding mechanism to be executed by a quantitative means of confirmation of lighting of a light emitting body. CONSTITUTION:A high-level forward signal is outputted from a flip-flop 3 by applying a start pulse from an input terminal 10 at first to drive a capstan motor. When a digital counter 1 counts a scheduled pulse number, the reverse transmission of the forward signal is stopped to stop the capstan motor and a reverse signal having a scheduled pulse width T2 is fed to the capstan motor from a monostable multivibrator 4. When the feeding is set to a small value and an LED 5 is lighted, since it is the case that the turning shaft of the capstan motor turns over a scheduled turning angle, a variable resistor R is adjusted to increase somewhat the pulse width T2. Thus, the pulse width T2 of the reverse signal is made adequate.</p> |
