Lexmark 4049LMO Service Manual - Page 32

4049-XXX Error Code 81 Engine Code CRC 88 Toner Low 90X Software Error 917 Transfer Roll Error 918 Transfer Roll Error 2-5 Explanation Microcode to be programmed into the engine board during a machine upgrade has failed a CRC check. The microcode data will be discarded and must be retransmitted from the host computer. Toner sensor detects low toner. Unrecoverable software error. If one of these errors appeared during POST, or while the printer was idle (not printing or receiving data), or while trying to print one of the internal test pages, replace the RIP Board. If the error appeared while sending a job from the host computer to the printer, turn the printer off, then turn it on and try again. If the error appears again, call the next level service support for assistance. Cannot start servo operation. Verify correct cable connections from the engine board to the HVPS. Make sure there is continuity between the transfer roller and its contact on the HVPS; replace the transfer roll if the continuity is correct. If there is no continuity, make sure the HVPS contact returns to its upward limit when depressed, and make sure the left bearing of the transfer roll is making proper contact. If the error persists, replace the HVPS and cable. Servo Failure. Verify correct cable connections from the Engine board to the HVPS. Make sure there is continuity between the transfer roller and its contact on the HVPS; replace the transfer roll if the continuity is correct. If there is no continuity, make sure the HVPS contact returns to its upward limit when depressed, and make sure the left bearing of the transfer roll is making proper contact.