Epson R800 - Stylus Photo Color Inkjet Printer, Service Manual

Page: 69 / 76

EPSON Stylus Photo R800 Revision A
TROUBLESHOOTING Overview 70
Image graininess The image graininess is poor
in all print modes or the
image looks rough. Improper
adjustment,
Main Board or
Print Head
1. Check that PG, Bi-D and Head Angular Adjustments have
been made properly.
1. Make adjustments according to the
specified adjustment priority. (Refer to
Chapter 5
"ADJUSTMENT" .)
2. Print the adjustment check patterns and check how rough
the image looks.
2. If the image graininess is not improved
after adjustment, change the Main Board
for a new one.
The image graininess is poor
only in the 2880dpi print
modes or the image looks
rough. Improper
adjustment,
Main Board or
Print Head
1. After making sure that PG, Bi-D and Head Angular
Adjustments have been made correctly, check whether
PW Sensor has been performed properly.
1. Make adjustments according to the
specified adjustment priority. (Refer to
Chapter 5
"ADJUSTMENT" .)
2. Print the adjustment check patterns and check how rough
the image looks.
2. If the image graininess is not improved
after adjustment, change the Print Head
and Main Board in this order, and check
the image graininess.
Color of image The whole image is reddish. Improper
adjustment or
Print Head
1. Check that the PG Adjustment value is proper. 1. Make adjustments according to the
specified adjustment priority. (Refer to
Chapter 5
"ADJUSTMENT" .)
2. Check that Bi-D and Head Angular Adjustments have been
made properly.
2. Make adjustments according to the
specified adjustment priority. (Refer to
Chapter 5
"ADJUSTMENT" .)
3. Print the adjustment check patterns and check the image
color.
3. If the image color does not change after
adjustment, change the Print Head for a
new one.
Borderless Printing Bordered printing is executed
for borderless printing. PW Sensor 1. Check if the paper powder or scrap of the paper is on the
Front Paper Guide.
1. Remove the paper powder or scrap of the
paper.
2. Check that the PW Sensor is operating normally.
Print the adjustment check patterns with the Adjustment
Program, and check that the clip function is executed
normally. (The clip function is executed normally if an
about 5mm margin is provided on the left of the first gray
band pattern in the patterns.)
2. Change the PW Sensor for a new one if it
has been confirmed in the adjustment
check patterns of the Adjustment
Program that the clip function is not
executed. (Refer to Chapter 5
"ADJUSTMENT" .)
Table 3-15. Print Quality Fault Check Points
Print Quality State Phenomenon Detail
Faulty Part/
Part Name
Check Point Remedy
Download Service Manual And Resetter Printer at http://printer1.blogspot.com