21. The copy is blank.22. The copy is solid black.CHAPTER 11 TROUBLESHOOTING11-82 COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CausePrimarychargingassemblyDevelopingassemblyDC controllerPCBScanning lampConnectorPotential controlsystemDeveloping biasMain motor(M1)ChecksIs the primary charging assemblyset securely?Is the charging wire or the gridwire broken?Is the developing assembly in firmcontact with the drum?Does the blanking exposure lampremain OFF while the scanner ismoving forward?Does the scanning lamp remainON during copying?Are the connectors of the PCBsconnected securely?Is the control by the potentialsensor executed normally?Is the contact of the developingbias firmly in place?•Is the 1st copy blank halfway?•Is the 1st copy blank, does the2nd copy have displacedregistration, and does astationary jam occur in thisStep123456789YES/NONOYESNONONONONONONOActionSet the chargingassembly.String the charging wireand the grid wire newly.Check the developingassembly locking lever.Check the DC controllerPCB.See “The scanning lampfails to turn ON.”Connect them securely.Replace the potentialmeasurement unit.Fix it in place.Replace the main motor(M1).Cause ChecksDoes the scanning lamp remainON during copying?Step1YES/NONOActionSee “The scanning lampfails to turn on.”
