Lexmark Optra C710 Service Manual - Page 185
Paper Tray 1., Paper size in tray x is not detected.
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5016-001 J Paper size in tray x is not detected. FRU 1 Tray 1 Rear Paper Guide 2 Paper Size Detect Plate Paper Size Detect Plate Sprint 3 CST Cable Paper Size Detect Sensor Board Engine Board Action Check the rear paper guide in tray 1 for correct installation and signs of damage to the paper size detect flag. If the flag is broken, replace the rear paper guide. Check the paper size detect plate spring for signs of looseness or if it is broken. If a problem is found, reconnect or replace the spring. Check the paper size detect plate for proper operation. If incorrect, repair as necessary. Check the continuity of the CST cable. If incorrect, replace the cable. Check the paper size detect sensor board for correct operation. If incorrect, replace the sensor board. If the CST cable and size detect sensor board are operating correctly, replace the engine board. K Paper level in tray x is not detected. Note: When the paper in tray 1 reaches 50 or less sheets the paper detect lever will turn on the paper detect sensor and display Load Paper Tray 1. FRU 1 Paper Sensor Detect Lever (Flag) 2 Paper Detect Sensor Interconnect Board Action Check the paper detect sensor lever (flag) in the paper feed unit assembly for correct operation, or if broken. Replace the lever (flag), if necessary. Replace the following FRUs in the order shown: 1. Paper detect sensor 2. Option Interconnect board Diagnostic Information 2-119