COPYRIGHT © 2000 CANON INC. 2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 20003-36 TCHAPTER 3 STANDARDS AND ADJUSTMENTSMeasure the voltage DEV-DC-CNTduring printing of J102A-8 on the DCcontroller PCB.Check the developing assembly forleakage; if normal, go to a check on thetransfer output.Make the following selections (DCvalue of the developing bias):COPIER>DISPLAY>HV-STS>BIAS.Covert the indication during printing(V) into a control voltage withreference to 8.5 "Potential ControlConversion Table."Is thedeferense betweenthe actual measurement ofDEV-DC-CNT and 'BIAS' inservice mode± 10%?YESANOChecking the Developing Bias OutputDisable potential control: COPIER>OPTION>BODY>PO-CNT=0.Measure the voltage TR-CNT duringprinting of J102A-12 on the DCcontroller PCB.1) Check the transfer charging assembly forleakage.2) Make the following selections in servicemode, and try changing the setting:COPIER>OPTION>BODY>FUZZY.3) Try replacing paper.Make the following selections in servicemode (level of current of transfercharging). Convert the reading (mA) duringprinting into a control voltage based on 8.5"Potential Control Conversion Table."Replace the photosensitivedrum.NOYESNOYESNOIs thedifference between theactual measurement of TR-CNTand 'TR' in servicemode ± 10%?Checking the Transfer OutputIs the tonerimage on the photosensitivedrum before transfernormal?Replace thehigh-voltage transformer.Is the problemcorrected?YESReplace the DC controllerPCB.Replace the DC controllerPCB.ENDEnable potential control: COPIER>OPTION>BODY>PO-CNT=1
