Epson STYLUS Scan 2000 Service Manual page 36

EPSON Stylus Scan 2000
PLATEN GAP LEVER
Timing
Paper feed
roller
Paper eject
rollers
Paper guide
(front)
Figure 2-6. Carriage Mechanism with platen gap lever (Top view)
As shown in Figure 2-6, the Platen Gap lever can be moved forward or back to
adjust for the thickness of the paper. The PG lever is connected to the carriage
guide shaft, which raises or lowers the carriage depending on the PG lever
position. The nozzle surface remains parallel to the paper in either position
thanks to a tilt adjustment mechanism. Also, the two parallelism-adjustment
levers, one mounted on each side of the carriage guide shaft, adjust the
parallelism between the platen and shaft when the shaft is installed in the
factory. This precise adjustment is necessary to make sure the gap between
the platen surface and the printhead surface is 1.04 mm in the normal position
or 1.74 mm in the thick-paper position.
Operating Principles
Home position
sensor
belt Carriage
unit
Rear (thick
Forward
paper) position
(normal)
position
Platen Gap
lever
Printer Mechanism Operation
Carriage
motor
Parallelism
adjust
lever
Revision A
36