Epson Stylus Color 740 Service Manual

EPSON Stylus COLOR 440, 640, and 740 Chapter 5 Adjustments
131
5.2.2.8 Head Voltage ID Input
The head volta
g
e ID is a numerical value stored in the printer’s
EEPROM. It corrects for manufacturin
g
variations in the piezo-electric
elements of the printhead. If the correct ID is not entered, the printer
will be unable to print properl
y
, and bandin
g
or blurred printin
g
ma
y
result. You must enter the correct head volta
g
e ID when:

Replacin
g
the main board

Replacin
g
the printhead

Replacin
g
the printer mechanism
1.
When
y
ou replace an
y
of the parts above, note the head volta
g
e ID
in advance. You can find the volta
g
e ID in the followin
g
locations:

Printhead
(
440 and 640
)
: On the side of the printhead.

Printhead
(
740
)
: On the top of the printhead.

Printer mechanism: On the label on the packin
g
box of the
printer mechanism.
2.
Enter the main menu.
(
See Section 5.2.2.3.
)
3.
Select
Adjustment
in the main menu.
4.
Select
Head Voltage ID Input
. The followin
g
screen appears.
Figure 5-22. Head Voltage ID Menu Screen
5.
Select
Change data
. The followin
g
screen appears, promptin
g
y
ou
to enter the head volta
g
e ID.
Figure 5-23. Head Voltage ID Input Screen
M S-D O S P rom pt-S C 640
H ead voltage adjustm ent
C hange data
C heck present data
E s c : P re v io u s U p /D o w n a rro w s : S e le c t E n te r: O K
E n te r th e d ig it v o lta g e ID
HEAD ACTUATO R VO LTAG E ID =
E n te r: O K
5
F o r th e S ty lu s C o lo r 4 4 0 , th e ID is
3
digits
F o r th e S ty lu s C o lo r 6 4 0 , th e ID is
5
digits
F o r th e S ty lu s C o lo r 7 4 0 , th e ID is
8
digits

Epson Stylus Color 740 Specifications

General

Brand	Epson
Model	Stylus Color 740
Category	Printer
Language	English