Epson Stylus C40UX Service Manual page 53

Stylus C40UX/C40SX/C20UX/C20SX
Table 3-18. Dot missing occur 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
connection point
pump unit seems work
correctly. But, any ink
6. Check if the pump tube
is not ejected to waste
has a little slack
ink pad.
between the Cap
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.
Troubleshooting
Check point Remedy
5. Replace the Printer
mechanism with new one.
Pump tube
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
Pump unit
7. If the problem is not
solved, replace the Printer
mechanism with new one.
Troubleshooting with LED Error Indications
Table 3-19. Dot missing occur and it is not recovered with CL
Step
Detail phenomenon
No.
1. Check if the segment in
In the CL sequence,
the nozzle check patter
ink is ejected to the
is reduced every CL &
Waste ink pad (this
Nozzle check pattern
means pump unit & cap
printing.
unit are working
2
correctly). But, the dot 2. Check if any damage is
missing is not solved at observed on the Head
the specific nozzles FFC.
even if the several CLs
are performed.
1. Check if the Head FFC
In the CL sequence, ink
is connected to the CN9
is ejected to the Waste
on the Main board or
ink pad. But, dot
Head FFC.
3
missing is occurred on
all nozzle in the printing
and is not solved in the
several CLs.
Revision B
Check point 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 CN9 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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