Printer Mechanism - Epson Stylus Pro 5000 Service Manual

Stylus Pro 5000

2.1 PRINTER MECHANISM

This chapter explains the mechanical and electrical operating principles
for the Stylus Pro 5000. Table 2-1 lists the components of the printer
mechanism and the motors that drive each component.
Table 2-1. Mechanism Components
Mechanism
Printing
Carriage
Paper Load/Paper Feed
Upper Surface Sensor
Paper Return
Lifter Gear Train
Stack Lowering
Sub Roller Gear Train
Motor(s) Function (Purpose)
— Discharges ink
Carriage Drives the carriage



Triggers the ink
disengage/engage
lever
Paper Feed, Loads and feeds


Pump/ASF paper
Opens and closes


the ink valve
— Adjusts the position of
the paper load roller to
the height of the paper
stack in the tray
Prevents the feed rollers
from taking many sheets
at once
Pump/ASF Lifts the paper stack
Keeps paper from
folding during feeding
Feeds paper through the

printer mechanism

Table 2-1. Mechanism Components (continued)
Mechanism
Gear Train
Disengagement
Ink Engage/Disengage Paper Feed
Platen Gap (PG) Carriage,
Adjustment Paper Feed
Ink Valve Paper Feed
Friction Release Pump/ASF
Chapter 2 Operating Principles
Motor Function (Purpose)
— Disengages the Lifter
Gear Train if no paper
tray is installed
Switches power between
the ASF and the Pump
Adjusts the platen gap
according to the paper
type
Prevents ink from
leaking during
transportation
Holds the trailing sheet
edge to prevent it from
flipping up and
misaligning the sheet
2-1