Lexmark Optra C710 Service Manual - Page 190
assembly when printing in simplex mode. The printer is operating
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5016-001 E 202 Paper Jam displays. Paper is jammed in upper unit of duplex assembly when printing in simplex mode. The printer is operating properly. FRU 1 Paper Exit/ Storage Selection Guide (Gate Claw) 2 Interlock Switch lower Duplex Unit (+24 V dc Interlock) 3 Upper Duplex Motor (FM) Upper Duplex Unit Gears, Rollers, Belt ADL, ADT Cables Action Check the paper exit/storage guide for proper operation. Check continuity of the microswitch and cable. • If incorrect, replace the switch or cable. • If there is continuity, replace the duplex option controller board. Check cables ADT and ADL. Check the gears, rollers and belt for proper operation. If the feed motor does not turn, check the voltages on CN904. Pin # 1 2 4 5 6 Voltage Signal ABM COM BM AM BBM Voltage Static +24 V dc +24 V dc +24 V dc +24 V dc +24 V dc All voltages are approximate values • If the voltages are incorrect, replace the duplex option board. • If the voltages are correct, replace the motor. 2-124 Service Manual