Manual Feed; Paper Jam Sensing - HP LaserJet II Serie Manual De Instrucciones

HP 33440/HP 33449 COMBINED SERVICE MANUAL
The registration rollers align the leading edge of the paper with the leadlng edge of the image
on the photosensitive drum. When the dlgnment is correct the Registration Clutch Solenoid is
activated and the rollers turn and advance the paper toward the photosensitive drum. After the
print image has been transferred to the paper at the transfer station, the paper is fed into the
Fusing Assembly by the Registration and Feed Rollers.
Registration Rollers
Paper (Bowed) Pick-up Roller
Transfer
Corona
o
\
~o
o
0
UT-"
o
Separation Pad
PAPER TRAY
Figure 5-14. Paper Reaching the Registration Rollers
Manual Feed
The timing of manual paper feed is identi~ to the timing for ~sette paper feed, except for the
following points:
1,
2.
A different input paper sensor is used.
Cassette paper out senso~ PS301.
Manual feed paper sensofi PS302.
The initial warmup time for manual feed is longer. It is assumed that manual feed will be
used for heavier media such as envelopes and heavier paper. Bemuse these heavier papers will
absorb more heat, the extra warmup time allows dl components of the fusing system to reach
the 180° C (355° F) temperature before paper movement begins, which is required for proper
fusing of toner to these papers.
Paper Jam Sensing
The Paper Delivery Sensor (PS331) indimtes when paper reaches and clears the fusing station.
PS331 detects a paper jam in any of the fo~owing conditions:
Paper does not r~ch the delivery sensor within the required time (delivery delay jam).
Paper does not cl-r the delivery sensor within the required time (delivery jam).
Paper is present at the delivery sensor when power is switched ON (paper was left inside the
printer and the fuser cooled-ofi, if the fuser is hot it will eject the paper).
5-14