Epson 4000 Service Manual - Page 192

EPSON Stylus Pro 4000 Revision B 3.3 Troubleshooting Based on Your Printout This section describes conceivable print quality problems that may occur with this printer and the troubleshooting points for those errors. Item 1 2 3 4 5 6 Table 3-5. Diagnosing trouble based on printout Description Dot missing Uneven printing/poor resolution Smudged or marred printout on front side Smudged or marred print out on reverse side White/black banding Banding Reference Page p.192 p.193 p.193 p.194 p.194 p.195 DOT MISSING Auto cleaning is performed by dot missing inspection of the Multi Sensor, but dot missing can be generated by increased congealing of ink on Print Head nozzle surfaces or in nozzles due to drying when dot missing inspection is OFF or printer has not been used for a long period. Check the following particulars. † Execute head cleaning or initial ink charge. 1. Execute head cleaning or initial ink charge by one of the following methods. Cleaning Cleaning Power cleaning Initial ink charge Execution Method Maintenance Mode 1: SSCL Maintenance Mode 2/SELF TESTING: KK2 Adjustment Program: CL3 Panel Setting menu/Maintenance Menu: Power Cleaning Adjustment Program: CL4 Maintenance Mode 2/SELF TESTING: Init.Fill Adjustment Program: Initial Ink Charge 2. Nozzle Check Pattern Printing (p54) Execute Nozzle Check Pattern Printing in the Panel Setting menu. ("Panel Setting" → "TEST PRINT" → "NOZZLE CHECK") CHECK P O IN T „ In Initial Ink Charge, a large amount of ink will be discharged into the Maintenance Tank. Therefore, check the counter indication (remaining value) beforehand. (If deemed necessary, prepare another Maintenance Tank as a spare.) „ Check the amount of ink remaining before starting Initial Ink Charge. If the remaining ink is less than 50%, replace the ink cartridge with a new one and then start the procedure. † If the power cleaning does not recover the printer, check the following points. „ If trouble occurs in all the ink colors. • Are the Print Head and Cap Unit sealed during Ink Charge? • If the Cap Unit / Pump Tubes have come off. • If the life of the Cleaning Unit has expired. • If the Cap Unit has failed. (The cap rubber is damaged, etc.) • If the Pump Unit has failed. (The tubes are crushed, etc.) • If the Printhead has failed. • If the fuse on the Main Board has blew. • Head FFC contact failure. „ If the trouble occurs with a specific ink color. • Head Cleaner is dirty. • Abnormal connections between the Ink Cartridge, Ink Holder, Tube, Damper, Print Head. (Fastening nuts loose, or the O-ring deformed or damaged, causing ink to leak, etc. could occur.) • Print Head failure • Execute power cleaning again. † If the trouble still occur even after checking the items listed above, replace the following parts and check again. • Printhead (p278) • C511 MAIN Board (p221) Troubleshooting Troubleshooting Based on Your Printout 192