Epson Stylus Color 740 Service Manual

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles
39
2.1.3 Platen Gap and Parallelism Adjustment
Mechanisms
The platen
g
ap
(
PG
)
ad
j
ustment lever chan
g
es the distance between
the printhead and the platen.
(
See Fi
g
ure 2-6.
)
The distance can var
y
between 1.04 mm and 1.74 mm. Normall
y
, the lever is kept in the
forward position, or narrow
g
ap settin
g
. In case of problems durin
g
printin
g
, such as paper curl, the user can move the lever toward the rear
to increase the
g
ap.
Table 2-4.
Platen Gap Adjustment Lever Settings
The parallelism ad
j
ustment levers, mounted on the left and ri
g
ht ends of
the carria
g
e
g
uide shaft, ad
j
ust ali
g
nment between the platen and the
g
uide shaft. Parallelism must be checked and ad
j
usted whenever a
new
g
uide shaft is installed on the printer mechanism, whether durin
g
the production process or repair. For details, see “
Parallelism
Ad
j
ustment” in Chapter 5,
Adjustments
.
Figure 2-6. Carriage Mechanism (Top View)
Paper Lever Position PG adjustment value
All media Front 0 mm
(1.04 mm between head and platen)
If you experience
print problems
Rear 0.7 mm
(1.74 mm between head and platen)
Carriage Home Position Sensor
Carriage Motor
Timing Belt
PF Roller
Paper Feed Motor
Eject Roller
Paper guide(Front)
Carriage Unit
Front
Rear
Parallelism
Adjust Lever
Carriage
Guide Shaft
Bushing
PG Lever

Epson Stylus Color 740 Specifications

General

Brand	Epson
Model	Stylus Color 740
Category	Printer
Language	English