Epson Stylus PHOTO 820 Service Manual page 73

EPSON Stylus PHOTO 810/820
Occurrence CR position at the
Error condition
timing power on timing
Poor printing
Operation
quality
Troubleshooting
Table 3-18. Poor printing quality
Phenomenon
Horizontal banding
against CR movement
direction
Star wheel mark
Insufficient top margin
- Ink Blur
Ink stain
Wrinkle
Unit Level Troubleshooting
Unit/Part name
Lower housing The porous pad for the "no margin" printing comes off.
PF motor The accuracy of the PF motor is lowered.
The PF roller has any foreign material.
PF roller unit The PF roller is damaged
The Spur gear 60 is damaged.
Printer driver The printer driver setting is not suitable.
Printhead Each segment is printed correctly in the nozzle check pattern.
The Front frame is bent down.
Front frame
The Star wheel comes off.
Paper eject roller unit The Paper eject roller shaft comes off.
LD roller unit The friction of the LD roller is lowered.
Printer driver The printer driver setting is not suitable.
Printhead The Head ID is not input correctly.
The Front frame has the ink stain somewhere.
Front frame
The Front frame is bent up.
The Lower housing has the ink stain somewhere.
Lower housing
The porous pad for the "no margin" printing comes off.
The Paper eject roller has ink stain somewhere.
Paper eject roller unit
The Spur gear 60 comes off.
Paper guide upper/left The Paper guide upper/left has ink stain somewhere.
PF roller unit The PF roller has ink stain somewhere.
The Printhead has the ink drop on the nozzle surface.
Printhead
The Printhead cover has the ink drop.
ASF unit The Hopper pad/LD pad is correctly not pasted on the dent.
Possible cause
Refer to Table 3-19
Revision A
Check table
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