Epson 680Pro Service Manual - Page 60

Table 3-22. Print quality is not good, Table 3-23. Print quality is not good

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EPSON Stylus COLOR 680/777/777i Table 3-22. Print quality is not good Step No. Detail phenomenon Check point Remedy 7. Replace the following parts. 1 Ditto • CR motor • CR timing belt • Compression spring 19.6 1. Check if each segment is printed correctly in the nozzle check pattern. 1. Perform the CL and check the nozzle check pattern. by using the Adjustment program. 2. Check if the suitable 2. Use the suitable paper paper is used according to the printer Micro banding appears horizontally against the according to the printer driver setting. driver setting. paper feeding direction 3. Check if the Paper 3. Clean the surface of the and it appears with the feed roller is dirty. PF roller carefully with same width. 4. Check if the following the soft brush parts do not have any 4. Replace the damaged damage. parts with new one. 2 CR movement • Combination gear 16, direction 21.6 • Combination gear 11.6, 36.8 • Spur gear 73.6 • Spur gear 25.6 5. Replace the Printhead with new one. Revision B Table 3-23. Print quality is not good Step No. Detail phenomenon Check point Remedy 3 Printing is blurred 4 Ink stains the paper 1. Check if the suitable paper is used according to the printer driver setting. 2. Check if the correct head ID is stored in the EEPROM by using the Adjustment program. 1. Check if the following parts are stained with ink. • Upper paper driven roller • PF roller • Paper guide front • Paper eject roller. 2. Check if there is some ink drops around the backside of the printhead. 3. If the bottom area of the printed paper has ink stain, check if the Paper eject frame is secured with three screws. 4. If the bottom area of the printed paper has ink stain, check if the Paper eject frame is bent upward. 1. Use the suitable paper according to the driver setting. 2. Input 6 digits code of the head ID into the EEPROM by using the Adjustment program. 1. Clean the ink stained parts with soft cloth. 2. Wipe off the ink drop with the soft cloth carefully. 3. Secure the screws fixing the Paper eject frame. 4. Replace the Paper eject frame with new one. Troubleshooting Troubleshooting with LED Error Indications 60

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EPSON Stylus COLOR 680/777/777i
Revision B
Troubleshooting
Troubleshooting with LED Error Indications
60
Table 3-22. Print quality is not good
Step
No.
Detail phenomenon
Check point
Remedy
1
Ditto
7. Replace the following
parts.
•
CR motor
•
CR timing belt
•
Compression spring 19.6
2
Micro banding appears
horizontally against the
paper feeding direction
and it appears with the
same width.
1. Check if each segment
is printed correctly in
the nozzle check
pattern.
2. Check if the suitable
paper is used
according to the
printer driver setting.
3. Check if the Paper
feed roller is dirty.
4. Check if the following
parts do not have any
damage.
•
Combination gear 16,
21.6
•
Combination gear
11.6, 36.8
•
Spur gear 73.6
•
Spur gear 25.6
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
PF roller carefully with
the soft brush
4. Replace the damaged
parts with new one.
5. Replace the Printhead
with new one.
CR movement
direction
Table 3-23. Print quality is not good
Step
No.
Detail phenomenon
Check point
Remedy
3
Printing is blurred
1. Check if the suitable
paper is used
according to the
printer driver setting.
2. Check if the correct
head ID is stored in the
EEPROM by using the
Adjustment program.
1. Use the suitable paper
according to the driver
setting.
2. Input 6 digits code of
the head ID into the
EEPROM by using the
Adjustment program.
4
Ink stains the paper
1. Check if the following
parts are stained with
ink.
•
Upper paper driven
roller
•
PF roller
•
Paper guide front
•
Paper eject roller.
2. Check if there is some
ink drops around the
backside of the
printhead.
3. If the bottom area of
the printed paper has
ink stain, check if the
Paper eject frame is
secured with three
screws.
4. If the bottom area of
the printed paper has
ink stain, check if the
Paper eject frame is
bent upward.
1. Clean the ink stained
parts with soft cloth.
2. Wipe off the ink drop
with the soft cloth
carefully.
3. Secure the screws fixing
the Paper eject frame.
4. Replace the Paper eject
frame with new one.