Chapter 2 Operation of Diag.
- About Solenoid
The solenoid in the printer opens/closes the shutter or controls the position of the gear for transfer-
ring the torque of the motor to the roller.
A solenoid becomes an electromagnet by the passage of electric current through the coil inside the
case and attracts the plunger.
Upon the loss of power to the coil, electromagnetic force is lost and the plunger is returned to its
original position by spring action, thereby allowing the shutter to operate or the gear to move to
the predefined position.
Unlike a clutch, a solenoid generates a loud operation noise.
2 - 20