Service manual

V. PICK-UP/FEED SYSTEM
A. Outline
The printer is equipped with two pick-up sources, the multi-purpose tray and the manual feed
slot.
Whether or not the multi-purpose tray and the manual feed slot are loaded with paper is
detected by the paper-out sensor (PS003).
The main motor (M001) starts rotating in about 0.5 seconds after the engine controller
receives a pick-up command from the interface controller.
When the printer enters the initial rotation ready mode (See Note), the pick-up solenoid
(SL001) is turned ON for 0.5 seconds. The pick-up roller is rotated by the transmitted rota-
tional force of the main motor, and the pick-up cam rotates with the roller. When the claw of
the pick-up cam is unhooked from the lifting plate, the plate is lifted with the spring force. A
sheet of the paper pushed up by the lifting plate is picked up by the pick-up roller and trans-
ferred into the printer. The paper pick-up timing is the same for the multi-purpose tray and the
manual feed slot. If the both pick-up sources are loaded with paper, priority is given to the man-
ual feed slot.
Figure 2-5-1
CHAPTER 2
2 - 30
PS201
PS001
Feed roller
Pick-up
roller
Photo-
sensitive
drum
Transfer
charging
roller
Fixing
unit
Face-down
delivery
roller
Fixing
unit
delivery
roller
PAPER TOP SENSOR signal
(/PISNS)
PAPER-OUT SENSOR signal (PAPERSNS)
PICK-UP SOLENOID DRIVE
signal (CPUD)
PAPER DELIVERY SENSOR
signal (POSNS)
MAIN MOTOR DRIVE signal
(MA, /MA, MB, /MB)
Face-down
delivery
Face-up
delivery
SL001
M001
Lifting
plate
Multi-
purpose
tray
Manual
feed slot
Deflector
Main
motor
Engine Controller PCB
PS002
➀ : Paper-out sensor
➁ : Paper top sensor
➂ : Paper delivery sensor
➃ : Pick-up solenoid
➀
➃
➁
➂