Printronix L5535, Руководство по обслуживанию

Страница: 164 / 358

II–164
Chapter 8
Operational Sequences
7. Transfer/separation charger ON.
The back surface of the paper transported against the drum surface is
charged to transfer the toner image from the drum surface to the paper
and separate the paper from the drum.
8. LSCA (page last raster) signal assertion.
When the last raster of each page begins to be scanned in the fanfold
paper mode, the LSCA signal is asserted to inform the controller of the
scanning of the last raster. At this time, checkout is performed to see
whether the PRNT signal is asserted by the controller. If such PRNT
signal assertion is done, the VSYNC signal for the next page is asserted.
9. Fuser ON.
When the paper comes underneath the fuser, the halogen lamp glows
steadily and the flash lamp intermittently lights.
Steps (3), (4), and (8) are repeated as needed to cover all the pages to be
printed. Note, however, that the conditions indicated in steps (5), (6), (7),
and (9) continue throughout printing, and the main unit feed motor,
vacuum fan motor, and stacker are continuously operating as stated in
step (3).
10. VSYNC signal assertion stopped.
If the PRNT signal is not asserted by the controller at the time of LSCA
signal assertion, the printer concludes that printing is terminated and
stops VSYNC signal assertion for the next page.
11. LED exposure stopped.
When VSYNC signal assertion is terminated, the VDO and VGATE
signals are no longer fed. Therefore, LED exposure also terminates.
12. Fuser OFF; transfer unit descent.
When the last-printed page passes underneath and beyond the fuser, the
fuser turns OFF.
At this time, the transfer unit descends to the lower position.
13. Transfer/separation charger OFF.
When the transfer unit begins to move downward, the transfer and
separation chargers turn OFF.
14. Tractor motor deactivation; paper cutting.
When the perforation positioned immediately after the last-printed page
arrives at the cutter position, the tractor stops and paper cutting takes
place. At this time, the main unit feed motor, vacuum fan motor, and
stacker also stop.
15. Tractor reversal.
When the paper is cut, the tractor reverses to return the leading edge of
unprinted pages to the parking position which is immediately in front of
the paper backward-feed sensor.