Epson STYLUS COLOR 480 Service Manual page 65

EPSON Stylus COLOR 480
Table 3-25. Print quality is not good
Print quality is not good
Step
Detail phenomenon
No.
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.
Vertical banding is
3. Check if the surface of
appeared against the
the CR sliding portion
CR movement
on the Paper eject
direction. And it looks
frame has enough oil.
like uneven printing.
1
CR movement
direction
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.
Troubleshooting
.
Check point Remedy
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. Refer to
Figure 6-4.
3. Clean the surface of the
CR sliding portion on the
Paper eject frame and
lubricate specific amount
of the G-26.
Refer to Figure 6-8.
G26 lubrication
4. Reassemble the CR
guide shaft into the
mounting slat on the
both side frame and
secure it with Rod
spring. Figure 4-50 and
Figure 4-51.
5. Replace the CR guide
shaft with new one.
6. Replace the Paper eject
frame with new one.
Unit Level Troubleshooting
Table 3-26. Print quality is not good
Print quality is not good
Step
Detail phenomenon Check point
No.
7) Check if the rubber
parts are stuck inside the
I/C cover.
1 Ditto
1. Check if each segment
is printed correctly in
the nozzle check
pattern.
2. Check if the suitable
paper is used
according to the
Micro banding appears
printer driver setting.
horizontally against the
3. Check if the Paper
paper feeding direction
feed roller is dirty.
and it appears with the
same width. 4. Check if the following
parts do not have any
damage.
2
• Combination gear 8.4,
CR movement
21.6
direction
• Combination gear
9.6,33.6
• Spur gear 35.4.
• Spur gear 15
Revision B
Remedy
7. Stick the rubber parts
inside the I/C cover.
8) Replace the following
parts.
• CR motor
• CR timing belt
• Compression spring 15.7
1. Perform the CL and
check the nozzle check
pattern. by using the
Adjustment program.
2. Use the suitable paper
according to the printer
driver setting.
3. Clean the surface of the
PR roller carefully with
the soft brush
4. Replace the damaged
parts with new one.
5. Replace the Printhead
with new one.
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