(Example) When La=12mm and Lb=9mm, shift the paper exit sidemirror base B rail upward by 1.5mm.• When Lc > Ld, shift the mirror base B rail downward by half ofthe difference of Lc – Ld.• When Lc < Ld, shift the mirror base B rail upward by half ofthe difference of Lc – Ld.(When moving the mirror base rail, hold the mirror base rail handle.)2 Adjust according to procedure (1) so that La=Lb and Lc=Ld aresatisfied.3 After completion of the adjustment, turn the mirror base drivepulley manually to full scan mirror base A and mirror base B,and check that the mirror bases are not brought into contactwith each other.(Note) When the mirror bases are moved extremely, theymay be brought into contact. Carefully avoid it.I. Center shift adjustmenta. This adjustment must be performed in the following cases:• The copy (100%) center is shifted from the original centermore than 2mm.• When any part of the lens rail or the lens unit is replaced.(1) Make a test chart for center position adjustment. (Refer to thefigure below.)(2) Set the test chart for the center position adjustment to thedocument reference line, and make a normal (100%) copy withan A4 or 11" × 81⁄2 " paper.(3) Check that the copied image line is at the center of the copypaper.(4) If the error of the copy image line is within the specified range(0±2.0mm), the adjustment is not required. If not, perform thefollowing procedures.(5) Remove the document reference plate and the right upper sidecabinet, and remove the document table glass.(6) Loosen the three fixing screws of the optical system unit andslide the optical system unit to adjust the center position.(7) After adjustment, set the removed parts in the reversed se-quence. make a copy of the test chart to check that the centershift is within the specified range (0 ±2.0mm). If the center shiftis within the specified range, the adjustment is completed. Ifnot, repeat procedures (2) – (7) until it is within the specifiedrange.J. Exposure balance adjustmenta. This adjustment is to provide uniform exposure, and must beperformed in the following cases:• When the reflector is replaced.• When the copy lamp is replaced.• When the exposure adjustment plate is replaced.(1) Set a half tone paper on the original table and make a halftone copy at 100%.(2) If the exposure of the half tone copy is uniform, the adjustmentis not required. If it is varied as shown below, perform thefollowing procedures.Draw a line at the centerCopy paper(A4 or 11" x 8½")Paper transport direction(Copy A)(Copy B)2.0mm or lessShift2.0mm or lessShiftCopy imageCopy paperfoldCopy paperfoldCopy image(Paper feed direction)Documentreference plateDocument table glassRight upper side cabinetABOriginalcenter(Original)CopypapercenterCopypapercenter(Copy 1)Move lens is the A direction(Copy 2)Move lens is the B direction2mmor less2mmor lessOptical systemunitLoosen thescrews(3pcs.)Lens bearing sideLensbodysidePaperdischargedirectionHalf-tone copyExposureinsufficient7 – 12 |
