Paper Transport - Printronix L5000 Series Maintenance Manual

Paper Transport

Fan-fold paper transport
When the MPU receives the print instruction (PRNT signal) from the 030 (or 040)
controller and completes paper loading, it sends the image data request signal
(VSYNC signal) to the controller and, at the same time, begins to expose the drum to
the LED array light. The fan-fold paper, loaded to the transfer point, is advanced by
the tractor when the drum-exposed surface reaches the toner transfer point. Then, the
paper is carried by the transport belts to the fuser and finally to the paper output
section.
In the fan-fold paper mode, the paper transport unit goes up into the upper position
just before the paper leading edge reaches the toner transfer point and stays there
until printing is completed. To prevent loss of data at the perforation in the fan-fold
paper mode, the paper transport feed motor runs the transport belts at a slightly
higher speed than the paper feed tractors.
Cut-sheet paper transport
In the cut-sheet paper mode, the transfer unit goes into the upper position when the
MPU receives the print instruction (PRNT signal) from the 030 (or 040) controller
and completes drum cleaning. The paper passing through the paper timing sensor
section then travels in front of the pre-drum roller assembly, runs through the transfer
point, rides on the transport belt, moves under the fuser while being carried by the
paper transport unit, and enters the paper output section through the scuff roller
assembly.
5–24
Elevator sensor, EPS4
Cutter
Elevator sensor, EPS3
Toner transfer unit
Principles of Operation