Table 24. Alphabetic error messages (continued) C8523-90921 Control panel messages 199 Message Event log display Explanation Recommended action ADF SKEW ERROR A skew in the ADF feeder has been detected by the ADF skew sensors. 1. Open the ADF feeder and remove the skewed media. Close the ADF feeder. 2. Reload the document and press START. 3. If the error persists, perform a SENSORS diagnostic in the diagnostics menu to verify that the skew front and skew back sensors are functioning correctly. 4. Verify that the pickup roller, feed roller assembly, separation belt assembly, and registration roller assemblies are clean and not damaged.
FLATBED COVER OPEN The ADF is open or the ADF open/ closed sensor is not functioning correctly. 1. Close the ADF. 2. If the error persists, perform a SENSORS diagnostic in the diagnostics menu to test the ADF open/closed sensor. RESEND UPGRADE Power to the MFP was lost during a firmware upgrade 1. Start the firmware upgrade operation over.