Epson L120 Service Manual page 45
Color inkjet printer
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L120
Adjustment Type
Mechanism adjustment
Priority
1
2
Checking the
CR/PF Belt
Adjustment Item
Platen Gap
tension check
Check if the PG is
Check the tension of
within the standard.
the CR Timing Belt
and PF Timing Belt.
Purpose
Remove
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Hopper
Replace
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Remove
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CR Motor
Replace
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Remove
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LD Roller
Assy
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Replace
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Remove
PE Sensor
Lever
Replace
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Remove
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Replace
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Main Board
(Read OK)
Replace
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(Read NG)
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Remove
Printhead
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Replace
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Printout pattern
See
" 3.3.1 Checking
See
" 3.3.2 CR/PF
the Platen Gap
Belt Tension Check
(p48)"
for the
(p50)"
for the
details.
details.
How to judge
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Adjustment program
Tool
See
p48
See
p50
Note "*1": Necessary when the part is replaced at a point in the disassembly procedures other than specified in this manual.
"*2": Replacement of Waste Ink Pad Assy is necessary.
Adjustment
3
4
5
Initialize Setting
EEPROM
(Including the MAC
Ink charge
Head ID input
data copy
address setting)
To copy adjustment
To write sale-
To fill ink inside the
To correct
values or the like
destination-specific
new Printhead to
characteristic
stored on the old
settings and the serial
make it ready for
variation of the
Main Board to the
number into the Main
print after replacing
replaced Printhead
new board when the
Board after replacing
the Printhead.
by entering its
Main Board needs to
it. And also to set the
Printhead ID (Head
be replaced.
MAC address as
ID).
necessary.
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Table 3-1. Required Adjustment List
Adjustment using the Adjustment Program
6
7
8
9
Maintenance
PF/EJ adjustment
Bi-D adjustment
counter
To reset the waste
To correct variations
To correct print start
ink counter after
in paper feed
timing in
replacing the Waste
accuracy to achieve
bidirectional
Ink Pad Assy.
higher print quality.
printing through
software control.
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OK
OK
NG
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NG
NG
NG
NG
OK
NG
Normal area
Examine the
pattern
printout patterns for
Examine the
each of the four
printout patterns
modes, and enter the
and enter the value
value for the pattern
for the pattern
with no gap and
with fewest lines.
overlap for each
Bottom area
mode.
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pattern
Examine the
printout patterns
and enter the value
for the pattern
with no overlap
and gap between
the two rectangles.
O
O
O
O
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"*3": Perform PF Belt tension check only.
"*4": Perform CR Belt tension check only.
Required Adjustments
10
11
12
Head angular
First dot position
TOP margin
PF deterioration
adjustment
adjustment
adjustment
To correct tilt of the
To correct the print
This corrects top
To reset the counter
Printhead caused at
start position in the
margin of printout.
or set it to its
the installation
CR Unit moving
maximum according
through software
direction through
to the replaced parts.
control.
software control.
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-2
-1
OK
0
1
- 2 -1 0 1 2
2
NG
Enter the values of
Examine the
Examine the
the most straight
misaligned lines
misaligned lines
lines.
printed on the left
printed on top of the
side of the paper,
paper, and enter the
and enter the
number beside the
number beside the
line that is exactly 5
line that is exactly 5
mm away from the
mm away from the
paper edge.
paper edge.
O
O
O
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Revision A
13
14
15
CR motor heat
PF motor heat
offset
protection control
protection control
To measure and
To measure and
correct the electrical
correct the electrical
variation of the
variation of the
motor and the power
motor and the power
supply board.
supply board.
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See
" 3.2.2.1 CR
See
" 3.2.2.1 CR
Motor Heat
Motor Heat
Protection Control /
Protection Control /
PF Motor Heat
PF Motor Heat
Protection Control
Protection Control
(p47)"
for the
(p47)"
for the
details.
details.
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45
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