Lexmark Optra S Service Manual - Page 65
POST fails with Close Duplex Rear Door displayed when Duplex, Rear Door is closed.
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4059-XXX POST fails with Close Duplex Rear Door displayed when Duplex Rear Door is closed. FRU 1 Rear Door Switch (Not installed on some duplex units) Action Check the rear door for correct installation and operation. Check to ensure the cable or connector is not damaged and is properly connected at J6 on the duplex system board. The rear door switch can be checked by measuring the continuity between J6-1 and J6-2 on the cable connector while actuating the rear door switch. If there is no continuity, replace the rear door switch assembly. If there is continuity, replace the duplex option system board. POST fails with Insert Duplex Front Cover message displayed. FRU 1 Front Cover Switch (Not installed on some duplex units) Action Check the switch for correct installation and that the jam removal tray actuates the switch. Check to make sure the switch cable is connected to J7 on the system board. If no problem is found, check the continuity between J7-1 and J7-2 on the cable connector while actuating the front cover switch. If there is no continuity, replace the front cover switch assembly. If there is continuity, replace the duplex option system board. Diagnostic Information 2-38