Epson 3880 - Stylus Pro Color Inkjet Printer, Service Manual, Page: 82 / 306

Epson Stylus Pro 3800/3800C/3850/3880/3885/3890 Revision C
TROUBLE SHOOTING Remedies for Print Quality Troubles 82
3.6 Remedies for Print Quality Troubles
This section provides troubleshooting of print quality troubles classifying them by observed symptom.
Symptom Description Remedy
Dot missing The nozzles are clogging with ink. Clear the clogged nozzles following the procedure below.
1. Run a manual head cleaning using the operation panel or the printer driver. (If
the symptom does not change after running the cleaning cycle four times,
proceed to the next step.)
2. Run a power cleaning cycle using the operation panel.
Replace the print head.
See 4.3.9.5 PRINT HEAD on page 161.
Ink cannot be fired normally due to a failure of the parts listed in the Remedy
column. Inspect the following parts, and fix any abnormality.
†
Pump Cap Unit (PUMP, CAP, ASSY)
See 4.3.9.1 PUMP, CAP ASSY. on page 150.
„
The tube of the CAP ASSY., PUMP is disconnected.
„
The tube of the CAP ASSY., PUMP has become flat.
„
The cap rubber is broken.
„
The cleaning blade is broken or some foreign substances have adhered to
the blade.
†
There is something wrong with the connection of the ink cartridge, ink holder,
tube, damper, and print head. (Replace the INK SYSTEM, ASSY.)
† The head FFC is not connected correctly.
†
Print head See 4.3.9.5 PRINT HEAD on page 161.
†
Main board See 4.3.4.1 BOARD ASSY., MAIN on page 113.
Ink smear (printed area) The paper is contaminated by ink smear in the paper feed path. Check the PF roller for ink smudges, and clean it if any dirt is observed.
Paper is rubbed against the print head. Widen the platen gap.