Lexmark Optra C710 Service Manual - Page 102

5016-001 A Media does not feed from MPT, 250 paper jam message displays. FRU 1 Gear B1 Gear 4 PF Bushing 2 Clutch Gear Paper Feed Drive Gear Paper Feed Idler Gear Fulcrum Gear Drive Gear 3 Bypass Paper Detect Sensor Bypass Paper Detect Sensor Cables Bypass Paper Detect Sensor Flag Engine Board Action Check PF gear B1, and gear 4 to be sure they turn. If any problem is found, repair as necessary. Check all the MPT paper feed gears for signs of worn, loose or broken parts. Check the gear pressure spring. Replace any broken or worn parts. Be sure the sensor cables are properly connected and are not cut or damaged. Be sure the ribbon cable that attaches the MPT sensor and clutch to the base printer is not cut or damaged. This may happen if caught between the printer frame and front cover assembly. Check the bypass detect sensor flag for proper operation. Check the voltages for the bypass paper detect sensor and paper feed clutch. The sensor can be checked with the front cover in the down position. Check pin 2, while activating the sensor flag in the MPT tray. Check the voltages on CN12 for the bypass paper detect sensor. Pin # 1 (Brown) 2 (Red) 3 (Orange) 4 (Yellow) 5 (Blue) Voltage Signal +5 V dc KAMIARIO DGND VP - SL4ON Signal Static +5 V dc 0 V dc 0 V dc +24 V dc +24 V dc Signal Activated +5 V dc +5 V dc 0 V dc +24 V dc 0 V dc All voltages are approximate values. • If the voltages on pins 1 and 4 are incorrect, replace the engine board. • If the voltage on pin 2 does not change, replace the sensor. • If this does not fix the problem, replace the engine board. 2-36 Service Manual