HP LaserJet 1100 - Printer Paper Feed System

EN Functional Overview
: Printer paper feed system
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Printer paper feed system
The paper input bin and the single-sheet input slot merge into one, main input area.
Paper placed in either of these areas enables the paper-out sensor (PS001), which
informs the ECU that paper is present. The following steps occur when the printer
receives a print job:
Step 1
The ECU enables the laser/scanner assembly and the motor. Paper motion
begins when the ECU energizes the solenoid (SL001).
Step 2
The paper pickup roller rotates once. The paper kick plate pushes the paper
against the pickup roller.
Step 3
The pickup roller grabs the top sheet and advances it to the feed assembly
drive rollers. To ensure that only one sheet is fed, a main separation pad and
two subpads hold the remainder of the stack in place.
Step 4
The feed assembly drive rollers advance the paper to the paper top
photosensor (PS002). This sensor informs the ECU of the exact location of
the paper's leading edge, so that the image being written on the
photosensitive drum can be precisely positioned on the page.
Step 5
The feed assembly drive rollers then advance the paper to the transfer area
where the toner image on the photosensitive drum is transferred to paper.
Step 6
After the image is transferred, the paper enters the fusing assembly where
heat from the fuser and pressure from the pressure roller permanently bond
the toner image to paper. The paper exit sensor (PS201) determines that
paper has successfully moved out of the fusing area.
Step 7
The fusing assembly exit rollers deliver paper to either the paper output bin or
the front paper output slot, depending upon the position of the face-up/face-
down lever.