5-10
Phaser 440 Color Printer
5
Theory of Operation
Drum loading
As the paper passes beyond the aligning rollers, it triggers paper-pass sensor 2.
This activates the transfer roll feed motor long enough to apply tension to the
transfer roll, pulling it taut. The aligning rollers carry the sheet of paper to the
spring-loaded paper clamp, waiting in the clamp open position to capture the
leading edge of the paper.
Figure 5-4 Paper clamp opening to receive a sheet of paper
8699-11A
Drum
rotates
backward
to open
clamp
Thermal head
Transfer
roll
Aligning roller
Paper
Paper
clamp opens
as it pushes
against stop
Drum stop
(attached to engine
frame, not drum)
Drum
Paper-
pass
sensor 2