Lexmark MS312 Service Manual

315, Theory of operation POR sequence As the printer turns on, the engine code goes through a series of tests to verify hardware integrity. If a hardware failure is detected, then it is reported to the printer. If the POR sequence cannot be completed successfully, then the printer may post an error mess…

51, Actions Yes No Step 7 Make sure that the paper loaded is from a fresh package. Note: Paper absorbs moisture due to high humidity. Store paper in its original wrapper until you use it. Does the problem remain? Go to step 8. The problem is solved. Step 8 Replace the imaging unit. Does the prob…

236, Lexmark MS312 Nameplate removal 1 Open the front door. 2 Remove five screws (A) securing the nameplate. A Control panel assembly removal 1 Remove the right cover. See “Right cover removal” on page 222. 2 Remove the nameplate. See “Nameplate removal” on page 236. 3 Remove the bezel. See “Bezel remo…

237, 4 Remove the screw (A) securing the ground connector to the controller board. A 5 Disconnect the cable JOPP1 or JOPP2 from the controller board. 6 Remove the screw (B) from the right front mount, and route the cable through the slot. B 4514-330 Parts removal 237 …

339, Part name index P/N Part name Page 40X8287 250-sheet tray............................................................................................................................................... 304 40X8528 250-sheet tray insert (option tray only).......................................…

317, #Part 1 Output bin 2 Photoconductor drum 3 Input sensor 4 First input roller 5 Transfer roller 6 Fuser exit roller 7 Fuser assembly 8 Paper exit roller Duplex printing After the first side of the media has been printed on and is partially fed out to the output bin, the duplex solen…