Xerox Phaser 3120 Service Manual

Also see for 3130 - Phaser B/W Laser Printer: Specifications Install guide User guide Quick reference guide

4-6TROUBLESHOOTINGService Manual4.2 Bad image4.2.1 Vertical Black Line and Band• Description 1. Straight thin black vertical line occurs in the printing.2. Dark black vertical band occur in the printing.Digital PrinterDigital PrinterDigital PrinterDigital PrinterDigital PrinterCheck and Cause Solution1. Damaged develop roller in the Developer.Deformed Doctor-blade or cleaning-blade.2. Scratched surface of the discharge rollerin the developer.3. Partly depression or deformation on thesurface of the transfer roller.1. If causes 1 and 2 occur in the developercartridge, replace the developer and try toprint out.2. Replace the transfer roller if occurred asNo. 3.4.2.2 Vertical White Line• Description White vertical voids in the image.Digital PrinterDigital PrinterDigital PrinterDigital PrinterDigital PrinterCheck and Cause Solution1. Foreign matter stuck onto the window ofinternal lenses of LSU mirror.2. Foreign matter or toner particles betweenthe developer roller and blade.(In case the life of the developer hasbeen expired, white lines or light imageoccur in front of the image.)3. It may occur when Burr and foreign sub-stances are on the window of the devel-oper frame.4. If the fuser is defective, voids occur peri-odically at the top of a black image.1. Foreign matter stuck onto the window :Clean the LSU window with recommend-ed cleaner(IPA) Clean the window with aclean cotton swab.2. Foreign matter in the LSU : Open thecover of LSU and clean with a cottonswab on the surface of the reflex mirror.3. No 3. : Remove the foreign matter andburr of the exposure window.(Developer cartridge)4. No. 4. : Open the front cover and checkribs that corresponds to the position ofthe voids. Remove if found.5. If the problems are not solved, replacethe developer cartridge.