Lexmark T522 Service Manual - Page 95
The base printer does not recognize that the high-capacity input, tray is installed.
UPC - 734646620642
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Page 95 highlights
4520-xxx The base printer does not recognize that the high-capacity input tray is installed. FRU 1 High-Capacity Feeder Autoconnect Mechanical Check 2 Base Printer or option mounted above 3 LVPS Option System Board Action Check the high capacity feeder input tray to make sure it is mounted correctly and is not pushed down into the frame assembly or damaged. Be sure the high capacity feeder input tray autoconnect is properly connected to the high capacity feeder tray option board assembly. Check the option or base printer autoconnect for signs of damage. Repair the high capacity option autoconnect as necessary. Check the voltages at J11-2 and J11-4. The voltage measures +24 V dc, If the voltage is correct, replace the high capacity system board assembly. If the voltage is incorrect, check the continuity of the AC input cable to the LVPS. If correct, replace the LVPS assembly. If incorrect, replace the AC cable to the input of the LVPS. Diagnostic Information 2-67