Toshiba 4580, Service Manual

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6570/5570 PAPER FEED SYSTEM 9 - 10 Mar. 1999 © TOSHIBA TEC
9.3 Large Capacity Feeder (LCF)
9.3.1 Introduction
For making large volumes of copies, the large capacity feeder (LCF) is designed to stack about 4,000
sheets of copy paper.
The LCF consists of the following three main parts:
(1) Tray section
1
Elevator tray ................... The elevator tray is designed to transport the stacks of paper to the
paper feed mechanism. The unit functions to keep the paper biased
towards the feeding mechanism so that paper is always in contact with
the feed rollers. When paper supply is exhausted, the tray will be low-
ered.
2
Elevator mechanism ...... The wire on either side of the elevator tray are wound around (or un-
wound from around) the wire winding pulley by the tray motor drive to
move the elevator tray up and down.
3
Switches ......................... Switches detect at the bottom and top positions of the elevator tray
and the presence of paper.
(2) Paper feeding section
This unit sends paper which is set in the LCF or the manual feed tray to the aligning section.The
paper feed secton is mainly comprised of pick-up rollers, feed rollers, separation rollers, manual-feed
switch, paper-empty switch, tray-up switch, paper-start switch and also their drive mechanism.
The drive mechanism has the feed motors for driving and the manual pick-up solenoid for up-and-
down operation.
1
Pick-up roller
This roller is for feeding paper out of the manual feed tray or LCF unit to the feed roller.
The manual pickup roller feeds paper vertically.
2
Feed roller
This roller is opposite of the separation roller. It is responsible for feeding paper to the aligning
roller.
When the belt winding pulleys rotate counter
clockwise (arrow
A
), the elevator tray moves
up using the principle of a tackle.
Wire winding
pulley
Tray elevation gear
A
A
F
R