Epson R320 - Stylus Photo Color Inkjet Printer, Service Manual

Page: 26 / 114

EPSON Stylus Photo R320 Revision B
TROUBLESHOOTING Unit Level Troubleshooting 26
Table 1-14. Check Points for Defective Print Quality
Occurrence Timing
Position of CR
Phenomenon Detail
Faulty Part/
Part Name
Check Point Remedy
At operation
-
[Phenomenon 1]
When the printer is performing the
Cleaning task, the ink is not drained into
"Waste Ink Pad" in spite of the correct
function of "Pump Unit".
The ink from "Print Head" is not
absorbed in the Cap at all.
[Phenomenon 2]
When the printer is performing the
Cleaning task, the ink is drained into
"Waste Ink Pad". (This indicates that
both of "Pump Unit" and "Cap Unit" are
working correctly.) However, missing
dots is not solved at certain nozzles even
performing the Cleaning several times.
[Phenomenon 3]
When the printer is performing the
Cleaning task, the ink is drained into
"Waste Ink Pad". (This indicates that
both of "Pump Unit" and "Cap Unit"
work correctly.) However, the wiping
function is not executed correctly and
irregular colors appear on the printed
sheet.
[Phenomenon 4]
When the printer is performing the
Cleaning task, the ink is drained into
"Waste Ink Pad". However, some
missing dots occurs while printing.
[Phenomenon 5]
When the printer is performing the
Cleaning task, the ink is drained into
"Waste Ink Pad". However, missing dot
occurs and the place where it occurs
varies in every movement of the
Cleaning.
Ink System
1. Check if there is any foreign matter on the sealing rubber
on "Cap Unit".
2. Check if the sealing rubber on "Cap Unit" is damaged.
3. Check if "Compression Spring, 2.53" is properly attached
in "Cap Unit".
4. Check if "Pump Tube" is properly connected to the
bottom of "Cap Unit".
5. Check if "Extension Spring, 0.788" has come off from
"Slider Cap".
6. Check if "Extension Spring, 0.441" has come off from
"Slider Lock Lever".
1. Remove the foreign matter from the sealing
rubber.
2. Replace "Ink System" with a new one.
3. Replace "Ink System" with a new one.
4. Replace "Ink System" with a new one.
5. Reassemble "Extension Spring, 0.788"
correctly.
6. Reassemble "Extension Spring, 0.441"
correctly.
Sealing rubber
Compression
Spring, 2.53
Contact point of
Pump Tube
Extension Spring, 0.788
Extension Spring, 0.441