EPSON WF-C20590 Service Manual Page 351-400

EPSON WF-C20590 Revision A Troubleshooting Troubleshooting from Failure Phenomenon 351 Confidential 6.5.4 ADF/Scanner Problems Print quality problems Paper feed failure Symptom Check and Measure Replace the part/Adjustment Dark lines (not including printouts from PC) When it occurs all the time Clean the glass surface of ADF. When it occurs in an interval Clean the paper feed path including the glass surface of ADF. If the problem still occurs after cleaning, replace the Scanner Unit. Cannot scan some portions or entire area of printed images 1. Clean the glass surface of ADF/Scanner glass. 2. Check the connection of scanner cable. 3. If the size of scanned document is different from the printer detection, the SCN Paper Sensor may be failure. If the problem still occurs, replace the Scanner Unit. The scanned image is too faint Dirt on the scanner (CIS Sensor) + reverse side scanner glass Clean these places. If the problem still occurs after cleaning, replace the Scanner Unit. The scanned image is skewed to the paper fed from the ADF tray. Make sure that the height of ADF is appropriate for the Scanner glass. Make sure that the ADF is installed in parallel to the Scanner glass. Adjust the position of ADF. If the problem still occurs after the adjustment, replace the ADF. Other print quality problems occurred only when copying 1. Clean the Document Scanner Glass 2. Disconnect and connect the Scanner Cable. If the problem still occurs, replace the Scanner Unit. Symptom Check and Measure Replace the part/Adjustment Multi-feed (Multiple pages are fed at once) Clean the ADF Paper Feed Rollers (three places). If the problem still occurs after cleaning, replace the Paper Feed/Separation Roller. Paper is folded Make sure there is no foreign object or damage in the ADF Paper Feed Path. After cleaning the path, if a damage of part is found, replace the ADF Unit. A paper jam inside the ADF occurs frequently Check that the ADF is closed correctly. Clean the ADF Paper Feed Rollers (three places). Clean the paper feed path in the ADF. Clean the surface of the paper feed rollers. Clean the Separation Pad of the Retard rollers. Clean the cork of the Document Support. If the problem still occurs after cleaning, replace the Paper Feed Roller.
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EPSON WF-C20590 Service Manual Page 351-400