02/20006-66 DocuPrint N2025/N2825GP 5.12, GP 5.13Initial IssueGeneral Procedures / InformationFigure 2 Full and Near End SensorsGP 5.13 MBF AssemblyMBF Tray Assembly – Figure 1Holds paper for the front feed (bypass feed). The MBF Tray Assembly is depressed by the PickUp Cams of the MBF Feed Roll Assembly when paper is not being fed. When the paper isabout to be fed, the Pick Up Cams move off the MBF Tray Assembly because of the rotation ofthe MBF Feed Roll Assembly and release the MBF Tray Assembly. The MBF Tray Assembly istherefore pushed up by the spring to press the paper against the MBF Feed Roll Assembly andgenerates the friction necessary for feeding a sheet of paper.MBF Feed Roll Assembly –Feeds a sheet of paper from the Tray Assembly MBF by the one turn of the roll on the ShaftPick Up each time the MBF Feed Solenoid is actuated.Tray 1 Feed Roll Assembly –Feeds a sheet of paper from the Tray 1 Assembly by the one turn of the roll each time the Tray1 Feed Solenoid is actuated.MBF Feed Solenoid and MBF Pick Up Gear –When the MBF Feed Solenoid is actuated, the MBF Pick Up Gear is released and turned bythe pulling force of the Spring Pick up to engage with the Gear MSSI IN. The MBF Pick UpGear then begins to rotate, causing the MBF Feed Roll Assembly to rotate. After one revolu-tion, the MBF Pick Up Gear disengages from the Gear MBF IN because of its sector-shapedcutout and is latched by the pawl of the Solenoid Feed CST.Turn Roll Assembly –The rotation of these rolls are controlled on and off by means of the Turn Clutch Assembly toguide the paper between the Metal Registration Roll and the Rubber Registration Roll or holdthe pre-fed paper from the Option Feeders on standby just before the Registration Sensor sothat the paper can be fed to the printing process immediately when the Controller is ready(when the printer receives /START from the Controller).When the printer (Print Engine Controller PWB) with the Pre-feed function receives /PRFDfrom the Controller, it pre-feeds a sheet of paper and halt the pre-fed paper at the pre-fed posi-tion just before the Registration Sensor by stopping the rotation of the Turn Roll Assembly. Theprinter restarts the rotation of the Turn Roll Assembly to resume the transportation of the paperwhen it receives the subsequent /START.When the /START is received before the paper reaches the pre-fed position, the printer trans-ports the paper continuously without stopping the rotation of the Turn Roll Assembly. ThePrinter without the Pre-feed function or the printer with the Pre-feed function when it receives /START without receiving /PRFD feeds a sheet of paper by the normal feed, and transports thepaper continuously without stopping the rotation of the Turn Roll Assembly.Turn Clutch Assembly –
