Lexmark T520 Service Manual - Page 35

4520-xxx Error Code 975 - 979 Network Card X 980 Comm 981 982 Comm 983 984 990 991 Card Action The following errors indicate a failure with the network card in the specified slot. X=any card installed in slots 1,2 or 3. 975 - Unrecognizable Network Card x. Replace Network Card x. 976 - Unrecoverable software error in Network Card x. 977 - Controller software detects that a Network Card is installed in slot x but cannot establish communications with it. 978 - Bad checksum while programming Network Card x. Replace Network Card x. 979 - Flash parts failed while programming Network Card x. If the printer is a network model, replace the controller board. The engine is experiencing unreliable communications to the specified device. The engine protocol violation detected by the specified device. Communications error detected by the specified device. Invalid command received by the specified device. Invalid command parameter received by the specified device. Note: Service Errors 980 thru 984 can be one of the following: engine board, duplex, tray x (1,2,3,4 or 5), envelope feeder or output bin. Indicates an equipment check condition has occurred in the specified device, but the device is unable to identify the exact component failure. Note: can be one of the following: duplex, tray x (1,2,3,4 or 5), envelope feeder or output bin. The specified device has detected an equipment check in its system card. Note: can be one of the following: duplex, tray x(1,2,3,4 or 5), envelope feeder or output bin. Diagnostic Information 2-7