Kyocera Mita FS-6750, Руководство по обслуживанию, Страница: 80 / 161

Operation theory
Paper feeding system
4-22 FS-6750
Figure 4.13 Transportation system diagram
Cassette feeding
The main logic controller sends the PRINT* signal to the engine controller after
fin-ishing data processing. The engine controller CPU then starts the main motor
(MOTON*), polygon motor, registration rollers, and the fuser heater. The engine
controller then issues the FEDDR* signal to connect the main motor power to the
paper feed tires. The tires feed the top sheet in the paper stack in the cassette
towards the registration rollers until the paper reaches the registration jam sensor
(JAMR). The printer performs printing by performing communication and synchro-
nization between the engine board and the main board.
The paper is advanced to the drum, to the fuser unit, triggering the exit sensor
(EXITJ*), and finally delivered either to the face-down tray or the face-up tray as
switched by the output stack selector tab.
Multi purpose tray feeding
The printer recognizes the existence of paper on the multi purpose tray when the
manual feed sensor is pushed up (HANDS*).
When the print data is ready, the engine controller sends MPFSOL* to raise the lift
board by the solenoid. After 300 ms, the MPFCLH* signal is issued to rotate the
feed roller and sends the paper towards the registration rollers. As the registration
sensor detects the paper, the lift board lowers. The registration rollers pulls and
sends the paper forwards for development.
Drum
Main motor
Heat Roller
Pressure Roller
Clutches Sensors Rollers
Transfer roller
Paper Cassette
Engine Controller
Feed
clutch
Manual
feed
solenoid Manual
feed
clutch
Regist
clutch
MOTON*
EXITJ*
REGDR*
FEEDS*
PAPER*
FEDDR*
MPFCLH*
HANDS*
MPFSOL*
Paper
sensor
Regist
sensor
Regist rollers
Exit
sensor
Exit rollers
Face-down rollers
Manual
feed
sensor