Lexmark E238 Service Manual - Page 100

4511-xxx Service error codes (9xx) (continued) Error Description Action 975 Unrecognizable network port 976 Software error in network port A failure with the network port. If the printer is a network model, replace the controller card. See "Controller card removal" on page 4-15. 978 Bad checksum while programming network port. 979 Flash parts failed while programming network port. Sub error codes The sub error codes are helpful troubleshooting a paper path problem. Each status byte has a different level of troubleshooting value for each area of the printer. The following table displays up to 8 status bytes of data. Some or all of these bytes may be used to help diagnose a printer problem. These status bytes are designed to help isolate paper jams and paper feed problems in the base printer. DU xx DU xx xx xx xx xx xx xx To identify the bytes: Byte 1 Byte 2 Byte 3 Byte 4 DU xx xx xx xx DU xx xx xx xx Byte 5 Byte 6 Byte 7 Byte 8 2-68 Service Manual