Xerox WorkCentre PE120 Service Manual

Also see for WorkCentre PE120: User guide Quick guide Install guide Evaluator guide Service manual

Contents

Xerox WorkCentre PE120 Service Manual Manual pdf 36 page image

Product Summary4-8 WorkCentre PE 120/120i4.3.1 Paper FeedThe paper feed system consists of an automatic document feeder, a 250-sheet main paper tray, bypass tray (MP),pickup rollers, friction pads and feed rollers. The rollers and sensors in the paper feed path control paperregistration and guide the paper through the image transfer, image development, image fusing and exit assemblies.The paper path has an anti-static connection to ground to eliminate problems due to static charge on the paper.1. Paper Separation MethodIndividual sheets are separated into each tray using the ‘friction pad’ method. When paper feeds into thesystem it passes over a spring loaded friction pad that separates the sheets of paper.2. Paper Tray (cassette)The paper trays use a ‘center loading’ method. There are no paper size sensors, instead a software process isused to detect the size of the first sheet of paper as it is fed through the printer. Both the rear and side paperguides are adjustable for various paper sizes.There is a ‘Paper Empty’ sensor which detects the presence of paper (Capacity: 250 sheets).There is an indicator flag on the front of the tray which indicates the amount of paper remaining.3. Pick-Up RollerThe pick-up roller is used to pick and feed paper into the printer. It also is used to remove any static charge onthe paper.4. Bypass Tray (MP)The multi-purpose tray is used to hold non-standard or custom paper sizes and special media (envelopes,transparencies, etc.). There is a bypass tray paper empty sensor. The Bypass Tray uses a friction pad method toensure paper separation and can hold a maximum of 50 sheets of paper or envelopes.5. Lower Tray Assembly (Tray 2)The optional tray unit is universal with the main tray and also has a capacity of 250 sheets.4.2.4 Transfer AssemblyThe transfer roller transfers toner from the OPC drum to the paper. Toner is transferred from the OPC drum ontothe paper using a PTL (Pre-Transfer Lamp) and a transfer roller. The PTL shines light onto the OPC, reducing theelectrical charge on the OPC surface improving the efficiency of the transfer.4.2.5 Drive AssemblyThe drive assembly receives power from the main controller board. The main motor powers the paper feed, tonercartridge, fuser unit and all pick-up, feed, and exit rollers.4.2.6 Fuser AssemblyThe fuser assembly uses a heat lamp process. This consists of a heat lamp, heat roller, pressure roller, thermistor,and thermostat. By use of heat and pressure, toner is melted to adhere to the paper surface in order to complete theprinting process.4.2.6.1 Thermistor and ThermostatThe thermistor is used to detect the temperature of the heating unit and feeds this information into the mainprocessor.