Epson Stylus PHOTO 820 Service Manual page 77

EPSON Stylus PHOTO 810/820
Occurrence
timing Detailed phenomenon
CR position
Banding * appears horizontally against
the CR movement direction.
* This banding is caused by the overlap
of the printing path
Star wheel mark against the CR
movement direction
Operation
-
The printing operation is correctly
performed. But, the top margin is
insufficient than usual one.
Printing is blurred.
Troubleshooting
Table 3-19. Check point for the poor printing quality
Defective
unit/part name
1. Check if the porous pad in the Lower housing comes off.
Lower housing
1. Check if the Star wheel comes off.
Front frame
2. Check if the surface of the Front frame is flat.
1. Check if the Paper eject roller comes off from the Lower
housing.
Paper eject roller
unit
1. Check if the any paper dust is adhered to the surface of the
LD roller.
LD roller unit
1. Check if the suitable paper is used according to the printer
Printer driver &
driver setting.
exclusive paper
1. Check if the correct Head ID is stored into the EEPROM
Printhead
by using the Adjustment program.
Unit Level Troubleshooting
Check point
1. Reassembly the porous pad correctly.
1. Reassemble the Star wheel correctly.
2. Replace the Front frame with new one.
1. Reassemble the Paper eject roller correctly.
1. Set a cleaning sheet in the ASF up side down.
LD roller
1. Use the suitable paper according to the printer
1. Input 11 digits code of the Head ID into the
Revision A
Remedy
Then holding the top edge, try to load the
paper from the Printer driver. The micro
pearl on the LD roller surface is removed. To
remove severe smear, staple a cloth
moistened with alcohol to a post card and
clean the roller in the same manner.
As for the cleaning sheet, refer to page 59
"Remedy of the Paper out error"
*If the problem is not solved, replace the
Holder shaft unit with new one.
driver setting.
EEPROM by using the Adjustment program.
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