| 摘要 |
A step motor and a motor control unit are connected to a battery, so that electrical power is continuously supplied to the step motor and the motor control unit. The motor control unit continuously drives the step motor until a rotor of the step motor reaches at a next excitation stable point, in a case that a display position adjusting switch or an ignition switch is turned off when the rotor of the step motor is on a way to the next excitation stable point.
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