COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)11-46Select potential control.( * 1 * ;'PO.CONT' '0')Measure the voltage during copyingbetween J114-A2 and -A13 on theDC controller PCB. (step C)Check the developing assembly forleakage.Start service mode( * 1 * ). Select'BIAS' (developing bias DC value).Convert the reading during copying(unit: V) into its control voltageaccording to 4 "Potential ControlConversion Table."Measure the voltage betweenJ114-A3 and -A13 on the DCcontroller PCB.Is thedifference betweenthe actual value in step C andthe reading under 'BIAS'in service mode±10%?YESYES(developing bias DCcomponent)(developing bias AC component)Select the primary power supplylimit notation. ( * 1 * ; 'PLMT')Is 'PLMY' '1'?Replace the photosensitive drum.Select non-potential control.( * 4 * ; 'PO.CONT' '1')ENDStart service mode ( * 1 * ). Select'PC' (primary charging assemblycurrent). Convert the readingduring copying (μA) into its controlvoltage according to 4 "PotentialControl Conversion Table."Replace the DC controller PCB.NOYESYESNOYESMeasure the voltage during copyingbetween J114-A5 and -A13 on theDC controller PCB.(primary output)Is thedifference between theactual value in step B and thereading of 'PC' ±10?Replace the DC controller PCB.NOAReplace the DC controller PCB.NOReplace the DC controller PCB.NODoes thevoltage change to about5 V while the scanneris moving forward?Replacethe high-voltage transformer.Is the problemcorrected?<Primary Output> BSelect Direct mode and 'GLEAM-5'in service mode ( * 3 * ) .YESDoes thevoltage vary between 0.5and 4 V during copying accordingto the input of'GLAM-5'? *Replace the DC controller PCB.NOCheck the lamp regulator or thescanning lamp.Enter a value (minimum/maximum; within thespecified range), and press the * user mode key;then, measure the voltage during copying.Ex.GLAM-5 Reading34 → 2.8V139 → 3.9V*
