Epson Stylus PHOTO 820 Service Manual page 76

EPSON Stylus PHOTO 810/820
Occurrence
timing Detailed phenomenon
CR position
Vertical banding appears against the CR
movement direction. And, it looks like
uneven printing.
Operation
Micro banding appears horizontally
-
against the CR movement direction and
it appears with the same width.
CR movement
direction
[Note]
If the problem is not solved, replace the
PF motor with new one.
Troubleshooting
Table 3-19. Check point for the poor printing quality
Defective
unit/part name
1. Check if the grease is enough on the surface of the
Front frame.
Front frame
2. Check if the surface of the Front frame is flat.
1. Check if each segment is printed correctly in the nozzle
check pattern.
Printhead
1. Check if there is any foreign material on the surface of the
PF roller.
PF roller unit
2. Check if the PF roller is damaged
3. Check if the Spur gear 60 is damaged.
1. Check if the suitable paper is used according to the printer
Printer driver &
driver setting.
exclusive paper
1. Check if each segment is printed correctly in the nozzle
check pattern.
Printhead
Unit Level Troubleshooting
Check point
G-58 lubrication
Revision A
Remedy
1. Clean the surface of the Front frame with the
dry soft cloth and lubricate G-58 on its shaft.
Refer to Figure 6-6/Figure 6-7.
2. Replace the Front frame with new one.
1. Perform the printhead cleaning and check the
nozzle check pattern.
If the problem is not solved, replace the
printhead with new one.
1. Clean the surface of the PF roller carefully
with the soft cloth.
2. Replace the Printer mechanism with new one.
3. Replace the Printer mechanism with new one.
1. Use the suitable paper according to the printer
driver setting.
1. Perform the printhead cleaning and check the
nozzle check pattern.
If the problem is not solved, replace the
printhead with new one.
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