Epson Stylus Color 740 Service Manual

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles
43
Paper Feed Mechanism
When the ASF loads paper into the printer, the PF and pinch rollers
receive it. These rollers in turn move the paper across the platen,
where printin
g
takes place, and feed it out throu
g
h the e
j
ect rollers. The
top e
j
ect roller is notched and set back from the lower e
j
ect roller at a 5-
de
g
ree an
g
le toward the platen. This compensates for paper curl and
allows the trailin
g
(
top
)
ed
g
e of the paper to pass under the printhead
without bendin
g
.
Figure 2-9. Paper Feed Mechanism
2.1.7 Ink System
The ink s
y
stem consists of the followin
g
:

ink cartrid
g
e

printhead cappin
g
mechanism

carria
g
e lock

cleanin
g
blade

ink pump

waste ink drain pad
Althou
g
h the PF motor drives both the paper feed mechanism and the
ink pump, the
g
ear linka
g
e contains no special mechanism to
disen
g
a
g
e these s
y
stems. However, this does not mean the pump is
alwa
y
s pumpin
g
ink. For the ink pump to operate, the printhead must
be capped b
y
the cappin
g
mechanism
(
to create a vacuum seal
)
and
the PF motor must turn the pump in the appropriate direction
(
to en
g
a
g
e
the pump drive rollers
)
.
Figure 2-10. Ink System Mechanism
Platen
5 degrees
Notched
Eject Roller
Paper
Printhead
PF Roller
Eject Roller
Pinch R oller
PF R oller D rive G ear
Eject R oller
D rive G ear
Eject R oller
Transm issionG ear
P F M o to r
Pinion G ear
Pum p
C apping U nit
C leaning B lade
C arriage Lock

Epson Stylus Color 740 Specifications

General

Brand	Epson
Model	Stylus Color 740
Category	Printer
Language	English