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I. MAINTENANCE AND INSPECTIONA. Image Adjustment Basic Proceduren Non-AE, Copy Density at 5COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-3Is there adifference in densitybetween frontand rear?Is it low (light)at the rear?Turn the adjusting screwat the rear of the primarycharging assemblyclockwise, and turn theadjusting screw at thefront counterclockwisethe same degree (1.5 mmmax. each).Make two to threecopies of the TestSheet.Check the height of thecharging wire.Turn the adjusting screwat the rear of the primarycharging assemblycounterclockwise, andturn the adjusting screwat the front clockwise thesame degree (1.5 mmmax. each).Turn off and then on themachine, and make acopy.Note 1: If the difference still exists after turning the screw1. 5 mm (each; a full turn causes a 0.7mmdifference), check the charging assemblies,scanning lamp, and scanner for dirt.Note 2: When turning the screw counterclockwise, takecare so that the wire is not 7.5mm or less inheight.Check the copy paperand the transfer system.Is the densityof gray scale No. 1too low (light)?Clean the standard whiteplate, mirror, lens, dust-roofing glass, scanninglamp, reflecting plate, andheat absorbing glass.Turn off and then on themachine, and make acopy.Is 'VDM' 'VDT'±10 V?Is 'PLMT' '1'?Is 'VL1M' 'VL1T'±10 V?Is 'VL1M" 'VL1T'±10V?Check the potentialcontrol system; ifnormal, replace thephotosensitivedrum.Check the scanninglamp and thepotential controlsystem; if normal,replace thephotosensitivedrum.Increase the value of'VDT-SW'.Turn off and on themachine, and make acopy.Increase the value of'LIGHT_5'.Decrease the value of'LIGHT_5'.Is the densityof gray scale No. 10proper?Is the densityof gray scale No. 10too high (dark)?Execute AE adjustment.(See p. 11-9.) <Solid black >NOYESYESNOYESNOYESNOYESNOYESNOYESNOYESNONOYES* 1 ** 3 ** 5 *Clean the charging wire.Make a copy.
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