Remedies For Print Quality Troubles - Epson Stylus Pro 7700 Service Manual

Epson Stylus Pro 7700/7710/7700M/7710M/7900/7910/9700/9710/9900/9910/WT7900/WT7910/9890/9908/7890/7908

3.7 Remedies for Print Quality Troubles

3.7.1 Remedies for Print Quality Troubles
This section provides troubleshooting of print quality troubles classifying them by observed symptom.
Before performing troubleshooting, refer to
perform the adjustment.
Symptom
Dot missing Ink stuck inside/on the surface of the nozzles.
The pump is not operating normally.
The Wiper is not operating normally.
There is something wrong in the ink path.
The Head FFC is not connected correctly.
The case those remedies above do not improve the symptom.
TROUBLE SHOOTING
" PRINT IMAGE (p360)" and print the test pattern. Confirm the printed result of the test pattern, and if any maladjustment is found,
Description
Remedies for Print Quality Troubles
Remedy/Points to be checked
Perform a cleaning (normal cleaning, clean each color, power cleaning).
Check the connection of the pump tube.
Check if there is any broken or pressed part on the pump tube.
Check the connection of the Pump Motor.
Replace the Ink System Unit. (See P.266)
Check the Wiper for any damage.
Check the connection of the Wiper Motor.
Replace the Ink System Unit. (See P.266)
Check the connections between Ink Cartridge, Ink Cartridge Holders, Ink tubes,
Damper, and the Printhead for abnormality.
Check the connection of the Head FFC, and if there is abnormality (slant
connection or the like), correct it.
Replace the following parts:
• Ink System Unit (See P.266)
• Printhead (See P.270)
• Main Board Assy (See P.228)
Revision I
149
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