| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem that, by applying current while serially connecting impedances of ink of each tank, the ink of each tank is electrically affected on, thereby, it is possible to generate harmful effect to detection accuracy for ink remaining quantity of each tank.SOLUTION: A signal is input to a selecting circuit 130. In the selecting circuit 130, a detection signal is generated for detecting a state of ink in a tank where ink remaining quantity is detected, and the detection signal is selectively output to electrodes 61A of the tank where the ink remaining quantity is detected.</p> |
