HP LaserJet II Serie Manual De Instrucciones página 204

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Exit Area Checks
The etit area of the printer consists of the Fusing Assembly, Delivery Assembly, and Face-Up
(Rear) and Face-Down (Top) Output Trays. Paper first enters the efit area of the printer at the
Fusing Assembly. In the Fusing Assembly, the paper is guided between the fusing and pressure
rollers where the toner image is permanently fused to the paper. As paper etits the Fusing Roller,
the Paper Pickoff Pawls pick the paper off the Fusing Roller. A Paper Etit Arm Flag and an
associated sensor (PS331) detect paper as it enters and efits the Fusing Assembly, The main
microprocessor on the DC Controller uses this signal (PDP) for monitoring paper jams.
The paper then encounters the Deflector Pawls (claws) which route the paper to the desired
output tray. In the downward position, paper is guided to the Face-Down (Top) Output Tray.
In the upward position, paper is guided to the Face-Up (Rear) Output Tray. Their position is
controlled by the position of the Face-Up (Rear) Output Tray. The delivery rollers in the Top
Cover Assembly feed the paper to the Face-Down (Top) Output Tray.
Drive for the Fusing Assembly is achieved when the printer Top Cover Assembly is closed. Closing
the cover forces a molded protrusion in the rear portion of the Top Cover Assembly to push
against a lever on the right end of the Fusing Assembly (see Figure 7-15). Pushing down this lever
muses the main drive gears of the Fusing Assembly to engage with the drive gear train from the
Main Motor. Drive to the Top Cover Assembly is provided by the Fusing Assembly when the Top
Cover Assembly is closed via the Delivery Coupler Assembly (see Figure 7-15).
A
P awi
Springs
Door Tensioning Spring \b/ \\
\
VY
I
Exit Sensor
Arm Flag
pier
A \ Rear Door
\\
Assembly
Separdon
Pawls &~
\
Door Tensioning Spring
Figure 7-15.
Paper
Exit Area
7-40