CHAPTER 2
B. Paper Pick-up
1. Pick-up operation
This printer conducts paper pick-up operation by lifting the paper to the paper pick-up position with the lifter and lowering the rotating cassette pick-up roller to the paper level.
Paper pick-up operation is conducted only when the multi-input tray driver receives the pick- up command from the option controller. The pick-up roller is lowered to the paper level by the rotational force of the main motor (MT1). At the same time, the pick-up roller is rotated by the rotational force of the pick-up motor.
Paper pick-up operation is conducted as follows.
On receiving the /PRNT from the video controller PCB, the DC controller PCB runs the main motor (MT1) and the pick-up motor (SMT1). When the cassette pick-up solenoid (SL1) is turned ON, the main motor rotates the cassette pick-up cam via the gear to drive the shaft drive arm.
At the same time, the rotational force of the pick-up motor is transmitted to the cassette pick- up roller via the feed roller gear. As a result, the rotating cassette pick-up roller goes down to the paper level, picks up a sheet of paper, goes up to the paper pick-up standby position, and stops rotation.
When the pick-up motor rotates clockwise, the paper is picked up from the upper cassette by rotating the cassette pick-up roller, feed roller 1 and separation roller of the upper cassette. When the pick-up motor rotates counterclockwise, the paper is picked up from the lower cas- sette by driving the cassette pick-up roller, feed roller 1 and separation roller of the lower cas- sette.
| Paper lifting plate |
Pick-up roller | Cassette pick-up cam |
|
Feed roller 1 | Print paper |
Main motor drive
Shaft drive arm
Pick-up roller shaft
Gear
Separation roller
| Cassettte pick-up |
| solenoid |
Pick-up motor drive | |
| Lift-up release arm |
Feed roller gear | Lift-up cam |
| Pick-up roller shaft fixing arm |
Figure 2-5-3
