Lexmark T520 Service Manual - Page 61

4520-xxx Check Device Connection Messages The messages in the following table display when the printer looses communications with one of the following devices. User Status Message Check Env Feeder Connection Check Tray X Connection Check Duplex Connection Explanation Check Envelope Feeder Connection. Check Tray X (X=1,2,3,4 or 5). Check Duplex Unit Connection. The messages in the following table can occur in two ways. The specified device could have been removed from the printer, for instance to clear a paper jam. Otherwise, the device can still be attached to the printer, but is experiencing a communications problem, not fully connected, or having a hardware failure. If the device is temporarily removed or not connected properly, then reattach it. When the option is recognized, the printer automatically clears the error and continues. If the option is experiencing a hardware problem, turn the printer off and back on. If the error occurs again, turn the printer off, remove the option and call for service. Diagnostic Information 2-33