Lexmark Optra C Service Manual - Page 36

5045-001 Start Use the error message table, symptom table, service checks, in this chapter and the diagnostic aids in Chapter 3 to determine the corrective action to repair a printer. If the operator panel is blank, black or appears unusual, unplug the video controller board and run the engine print tests using the Density Adjustment Panel. Go to Chapter 3 "Diagnostic Aids" to start the call since the operator panel or video controller board may have a defect. If an error is displayed, locate it in the following "error message table" and take the appropriate action. If your machine does not have an error code and does not complete Power-On Self Test (POST), go to POST and the POST symptom table. If your machine makes it through POST without an error but you have a symptom, go to the symptom table, locate your symptom and take the appropriate action. If an error message appears while you are working on the printer, go to the error message table and take the indicated action. Note: Some of the following service checks require voltage and/or continuity readings. For continuity readings, turn off and unplug the printer or optional sheet feeder. For voltage measurements, close the front door and be sure the door micro switch is in the closed position. WARNING: It is possible for the printer to enter POST or print tests with all covers removed (except the front cover) and the door switch closed. 2-4