Epson STYLUS COLOR 480 Service Manual page 64

EPSON Stylus COLOR 480
Table 3-23. Dot missing occur and it is not recovered with CL
Dot missing and it is not recovered with CL
Step
Detail phenomenon
No.
5) Check if the Pump
tube is connected to
the bottom of the Cap
assembly correctly
In the CL sequence,
the pump unit seems
6) Check if the pump tube
work correctly. But,
has a little slack
any ink is not ejected
between the Cap
to waste ink pad.
1
assembly and the pump
Moreover, any ink is
unit when the Cap
not absorbed from the
assembly is slide up
head to the cap. completely.
Cap assy.
Pump unit
Troubleshooting
Check point Remedy
5) Connect the Pump tube
to the bottom of the Cap
assembly deeply.
Pump tube
connection point
6) Pump unit may coil the
pump tube inside the unit.
In this case, pull out the
coiled tube from the
pump unit carefully.
After that, connect the
pump tube to the Cap
assembly after placing
the tube correctly.
Tube
7) If the problem is not
solved, replace the Pump
unit with new one.
Unit Level Troubleshooting
Table 3-24. Dot missing occur and it is not recovered with CL
Dot missing occur and it is not recovered with CL
Step
Detail phenomenon Check point
No.
1. Check if the segment
In the CL sequence,
in the nozzle check
ink is ejected to the
patter is reduced every
Waste ink pad (this
CL & Nozzle check
means pump unit &
pattern printing.
cap unit are working
2
correctly). But, the dot 2. Check if any damage
missing is not solved at is observed on the
the specific nozzles Head FFC.
even if the several CLs
are performed.
1. Check if the Head
In the CL sequence,
FFC is connected to the
ink is ejected to the
CN4 on the Main board
Waste ink pad. But, dot
or Head FFC.
missing is occurred on
3
all nozzle in the
printing and is not
solved in the several
CLs.
Revision B
Remedy
1. Replace the I/C with
new one in the I/C
replacement sequence.
2. Replace the Head FFC
with the new one.
3. Replace the printhead
with new one.
1. Connect the Head FFC
securely to the CN4 on
the Main board or
Printhead.
2. Replace the Printhead
with new one.
3. Replace the Main board
with new one.
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