Lexmark T620 Service Manual - Page 100

4069-5XX/7XX Printer does not recognize Tray X is installed. FRU 1 Autoconect Cables Tray X System Board Action Check the autoconnect from the printer or option above tray x. Check for signs of cuts, pinched wiring or damage to the contacts in the connector. Check the autoconnect cable(s) for correct installation at the tray x system board. If correct, check the continuity of the autoconnect cable(s). If correct, replace the tray x system board. If incorrect, replace the cable. Paper from Tray X does not reach the Pass Thru Sensor. Service Tip: Check the media in tray x to make sure it is within specifications. Some types of labels, foil material and slick papers can cause misfeeds and slippage of the rollers. FRU 1 Auto compensator Assembly Action Check the auto compensator pick arm rollers for any sign of glazing, toner or other buildup. Clean or replace as necessary. High-Capacity Feeder Input Tray Service Check Note: Voltage measurements in the high-capacity feeder input tray service checks must be made with the high-capacity feeder attached to the base printer to obtain accurate results. Service Tip: Be sure the paper size switch is set to the correct paper size setting and the rear paper guides are in the correct locations for the size of paper installed in the high-capacity feeder tray. Service Tip: Check the other paper sources to be sure they are operating correctly. 2-72 Service Manual