Fujitsu Impact 3650, Maintenance Manual

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5.2.2 Paper Feed Operation
5.2.2.1 Paper path selection mechanism (HCPP)
Figure 5.10 Control panel
The “PAPER PATH” button on the control panel is used to select cut sheet paper, front-fed continuous forms, and
rear-fed continuous forms. The button lights a lamp indicating the type of paper to be used. When the PAPER
PATH button is pressed to select the type of paper, the printer automatically operates the applicable components
by using power of HCPP motor rotation.
The opening and closing of a roller and the state of a motor connection place in each paper path are as follows.
Table Condition of Each PAPER PATH
PAPER PATH “TRACTOR F” “CUT SHEET” “TRACTOR R”
STATE OF ROLLER 1 2 * 2 * 1
1 Nip ROLLER F OPEN CLOSE CLOSE CLOSE CLOSE
2 Nip ROLLER R CLOSE CLOSE CLOSE CLOSE OPEN
3 What TR motor drives FRONT TRACTOR Nothing REAR TRACTOR
4 What LF motor drives ROLLERS ROLLERS ROLLERS
Note * ; In each tractor mode, both of nip rollers are closed when loading and ejecting the paper.
< Opening and closing the Nip Roller>
HCPP motor moves OC lever L and R through the gear. And OC lever L and R move the OC slide cams. And
OC slide cams moved the OC calms. and OC came lift up the Nip roller.
When OC slide cam move to the front side, then front Nip Roller is opened.
When OC slide cam move to the rear side, then rear Nip Roller is opened.
< Switching the TR motor transmission>
HCPP motor rotates the OC lever L. And OC lever L’s rib (cam) shifts shift gears F and R to switch power to
the TR motor.
< How to determine the home position of a HCPP mechanism>
When the PAPER PATH button is pressed to change the paper path, the OC lever operates to detect the ON/OFF
state of the HCPP switch under the OC lever L. OC lever L has a cam to operate the switch, which is closed in
REAR TRACTOR side and open in FRONT TRACTOR side.
Detecting the home position done from off state to on state.