Chapter 1313-2413.5 Image Formation System13.5.1 Outline of the Charging Wire0009-5695The photosensitive drum is surrounded by three charging wires (forprimary charging, pre-transfer, and transfer/separation).These charging wires are newly adopted brown wires (0.06 mm indiameter). Do not use a gold-plated wire, which has been used in thepast; otherwise, image faults may occur.Further, be sure to use a strengthened polishing pad (in a blue holder) asthe cleaning pad for the primary charging assembly and the transfercharging assembly.13.5.2 Routing the Charging Wire0009-5696All charging wires (except the grid wire) are routed more or less in thesame way; the following cites the primary charging assembly:1) Remove the shielding plate (left, right) of the charging assembly. Toprevent deformation (slack) in the primary charging assembly, besure to work separately for the left shielding plate and the rightshielding plate (i.e., do not loosen the mounting screws [1] of bothshielding plates at the same time).2) Remove the wire cleaner.F-13-37For other charging assemblies, remove the two lids.3) Free a length of about 5 cm of charging wire from the charging wirereel (0.06 mm in diameter), and form a loop at its end with a diameterof about 2 mm.MEMO:To form a loop, wind the charging wire around a hex key once, and turnthe hex key three to four times; then, twist the charg-ing wire.4) Cut the end (excess) of the twisted charging wire.5) Hook the loop on the stud.F-13-386) At the rear, hook the charging wire on the charging wire positioner;then, hook the charging wire tension spring on the charging wirewhere indicated to the following figure.F-13-397) Cut off the excess of the charging wire with nippers.8) Pick the end of the charging wire tension spring with tweezers, andhook it on the charging power supply electrode.In the case of the pre-transfer charging assembly, hook the spring on thepin at the front.F-13-40F-13-41Make sure of the following:- The charging wire must not be bent or twisted.- The charging wire must be fitted in the V-groove of the charging wirepositioner.9) Attach a cushoin in front of the charg-ing wire. (This does not applyto the primary charging assembly.)10) Mount the shielding plate (left, right).For other charging assemblies, mount the two lids.11) Mount the wire cleaner. At this time, pay attention to make sure thatthe wire cleaner is oriented correctly.12)Wipe the charging wire with lint-free paper moistened with alcohol.13.5.3 Routing the Grid for the Primary ChargingAssembly0009-56971) Loosen the two mounting screws used to secure the left and rightshielding plates in place.2) Loosen the three mounting screws used to secure the motor unit inplace at the front.F-13-423) Loosen the mounting screw, and move it in the direction indicated;then, fix it in place temporarily.4) Free a length of about 5 cm of charging wire from the charging wirereel (0.1 mm in diameter), and form a loop at its end with a diameterof about 2 mm.[1]Charging electrode(rear)(front) Charging wireReelStudCorrectCorrectWrongWrongGrid sideScrews
