Lexmark X644E Service Manual - Page 186

7002-xxx Tray x Empty displays when tray x has paper in the tray FRU 1 Paper out sensor flag 2 Paper out sensor (on option system board) Action Check the paper out sensor flag for correct operation and installation. If correct, replace the option system board. (The paper out sensor is mounted on the system board). Printer does not recognize Tray x is installed FRU 1 Autoconnect cables Tray x system board Action Check the autoconnect from the printer or option above tray x. Check for 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, replace the tray option. 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 Autocompensator assembly Action Check the autocompensator pick arm rollers for any sign of glazing, toner or other buildup. Clean or replace as necessary. Interface card service check Warning: When replacing any one of the following components: • Flatbed interconnect card (ICC) • System board assembly • Interface card assembly Only replace one component at a time. Replace the required component, and perform a POR before replacing a second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never replace two or more of the components listed above without a POR after installing each one, or the printer will be rendered inoperable. Warning: Never install and remove components listed above as a method of troubleshooting components. Once a component has been installed in a printer, it cannot be used in another printer. It must be returned to the manufacturer. Check the interface card for correct installation and for any signs of damage. If the card is damaged, replace the interface card. See "Interface card assembly removal" on page 4-107. 2-148 Service Manual