Lexmark C750 Service Manual - Page 122

5060-00x DB1 1C 1E 1F 20 Explanation Paper detected at punch timing sensor too long. Dirty or failed punch timing sensor. Paper not detected at punch timing sensor within timeout. Jam near input, misdirected sheet (diverter stuck or misaligned), sensor failure. Finisher internal software error. Intermittent sensor might cause this error. Unexpected sheet detected at punch timing sensor. Stuck diverter (possibly due to alignment), damaged sheet, dirty or failed sensor. 900 RIP Software Error There may be a communication problem (bad cable, network connection, and so on), software issue, or a hardware problem with the controller board/INA. The communication and software aspects should be checked first. Determine if the problem is constant or intermittent. Constant 900 errors Step 1 Action and questions Reset the ITU electrical disconnect. Turn the printer off. Raise and lower the lever above the ITU handle. Do not remove the ITU assembly itself. Make sure the level is pressed firmly in place. Turn the printer on. Yes Go to step 2 No Problem resolved Does the 900 error display? 2 Disconnect the printer from any external connections. Turn the power off and remove any parallel, USB, or network connections. Turn the printer on. Does the 900 error display? 3 Run the internal test pages. Print one of the internal test pages from the Utilities Menu. If the printer works correctly while disconnected, have the user or their network administrator verify that there are no jobs in the queue which may be causing the error. Does the error remain? 4 Turn the printer off. Remove any options from the RIP or riser card, such as additional memory, hard disk drives, or option cards. Does the 900 error persist when the printer is turned on? Go to step 5 Determine which option is causing the 900 error. Inform the user or network administrator of the issue. Go to step 4 Go to step 4 Go to step 3 2-88 Service Manual