Epson 680Pro Service Manual - Page 59

Table 3-20. Dot missing occur and it is not recovered with CL, Table 3-21. Print quality is not good

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EPSON Stylus COLOR 680/777/777i Table 3-20. Dot missing occur and it is not recovered with CL Step No. Detail phenomenon Check point Remedy In the CL sequence, 1. Check if the segment in 1. Replace the I/C with new ink is ejected to the Waste ink pad (this the nozzle check patter is reduced every CL & one in the I/C replacement sequence. means pump unit & cap Nozzle check pattern 2 unit are working printing. correctly). But, the dot 2. Check if any damage is 2. Replace the Head FFC missing is not solved at observed on the Head with the new one. the specific nozzles FFC. even if the several CLs are performed. 3. Replace the printhead with new one. 1. Check if the Head FFC 1. Connect the Head FFC In the CL sequence, ink is connected to the CN8 securely to the CN8 and is ejected to the Waste and CN9 on the Main CN9 on the Main board or ink pad. But, dot board or Head FFC. Printhead. 3 missing is occurred on all nozzle in the printing and is not solved in the 2. Replace the Printhead with new one. several CLs. 3. Replace the Main board with new one. Revision B . Table 3-21. Print quality is not good Step No. Detail phenomenon Check point Remedy Vertical banding is appeared against the CR movement direction. And it looks like uneven printing. 1. Check if each segment is printed correctly in the nozzle check pattern. 2. Check if the surface of the CR guide shaft dose not have any sever stain. 3. Check if the surface of the CR sliding portion on the Paper eject frame has enough oil. 1. Perform the CL and check the nozzle check pattern. 2. Clean the surface of the CR guide shaft with the dry soft cloth and lubricate G-55 inside the CR guide shaft. 3. Clean the surface of the CR sliding portion on the Paper eject frame and lubricate specific amount of the G-26. 1 CR movement direction G26 lubrication 4. Reassemble the CR guide 4. Check if the CR guide shaft is assembled in the correct portion securely. shaft into the mounting slat on the both side frame and secure it with Rod spring. 5. Check if the surface of the CR guide shaft is flat. 6. Check if the surface of the Paper eject frame is flat. 5. Replace the CR guide shaft with new one. 6. Replace the Paper eject frame with new one. Troubleshooting Troubleshooting with LED Error Indications 59

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EPSON Stylus COLOR 680/777/777i
Revision B
Troubleshooting
Troubleshooting with LED Error Indications
59
.
Table 3-20. Dot missing occur and it is not recovered with CL
Step
No.
Detail phenomenon
Check point
Remedy
2
In the CL sequence,
ink is ejected to the
Waste ink pad (this
means pump unit & cap
unit are working
correctly). But, the dot
missing is not solved at
the specific nozzles
even if the several CLs
are performed.
1. Check if the segment in
the nozzle check patter
is reduced every CL &
Nozzle check pattern
printing.
2. Check if any damage is
observed on the Head
FFC.
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.
3
In the CL sequence, ink
is ejected to the Waste
ink pad. But, dot
missing is occurred on
all nozzle in the printing
and is not solved in the
several CLs.
1. Check if the Head FFC
is connected to the CN8
and CN9 on the Main
board or Head FFC.
1. Connect the Head FFC
securely to the CN8 and
CN9 on the Main board or
Printhead.
2. Replace the Printhead
with new one.
3. Replace the Main board
with new one.
Table 3-21. Print quality is not good
Step
No.
Detail phenomenon
Check point
Remedy
1
Vertical banding is
appeared against the CR
movement direction.
And it looks like uneven
printing.
1. Check if each segment
is printed correctly in
the nozzle check
pattern.
2. Check if the surface of
the CR guide shaft dose
not have any sever
stain.
3. Check if the surface of
the CR sliding portion
on the Paper eject frame
has enough oil.
4. Check if the CR guide
shaft is assembled in the
correct portion
securely.
5. Check if the surface of
the CR guide shaft is
flat.
6. Check if the surface of
the Paper eject frame is
flat.
1. Perform the CL and check
the nozzle check pattern.
2. Clean the surface of the
CR guide shaft with the
dry soft cloth and
lubricate G-55 inside the
CR guide shaft.
3. Clean the surface of the
CR sliding portion on the
Paper eject frame and
lubricate specific amount
of the G-26.
4. Reassemble the CR guide
shaft into the mounting
slat on the both side frame
and secure it with Rod
spring.
5. Replace the CR guide
shaft with new one.
6. Replace the Paper eject
frame with new one.
CR movement
direction
G26 lubrication