Lexmark T620 Service Manual - Page 97

4069-5XX/7XX FRU 1 Input Sensor Flag 2 System Board 3 Input Sensor Cable Action Check the input sensor flag for damage and proper operation. If a problem is found, repair as necessary. Check for approximately +5 V dc at J25-10 on the system board. If incorrect, replace the system board. Check the continuity of the input sensor cable section of the front wiring harness. If incorrect, replace the harness. If correct, replace the input sensor assembly. Input Tray(s) Option Service Check 250 Sheet and 500 Sheet Trays Service Tip: Try all the other input paper sources to make sure they are properly feeding paper. For 990 Error Code- Service Tray X, X= displays the number of the tray that has a problem or needs service. FRU 1 Tray X option System Board or Compensator Assembly or Autoconnect Cable Action Check the autoconect cables and connectors for any signs of damage. Replace if necessary. Check the cables for continuity. If incorrect, replace the compensator assembly cable. If the cables, connectors and connections are good, replace the FRUs in the following order: auto compensator assembly option system board Diagnostic Information 2-69