Lexmark Optra C710 Service Manual - Page 191

5016-001 F 202 Paper Jam displays. Paper is jammed in upper unit of the duplex assembly, when printing in the duplex mode. The printer is operating correctly. FRU 1 Upper Cover 2 Paper Exit/ Storage Selection Guide (Gate Claw) Gear 27Z, Limiter Parts, Paper Exit Roller 3 Interlock Switch lower Duplex Unit (+24V dc Interlock) Duplex Option Controller Board 4 Upper Duplex Motor (FM) Upper Duplex Unit Gears, Rollers, Belt Action Be sure the latch on the upper cover is correctly located in the opening in the paper exit guide. If it is not properly installed, paper will catch on the upper cover and jam. Check the paper exit/storage guide for proper operation. Check all the gears, limiter parts and rollers for signs of wear, broken parts or binds. Repair or replace broken, worn or binding parts. Check the 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. Diagnostic Information 2-125