11-100CHAPTER 11 TROUBLESHOOTINGCOPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)39 The Add Paper indicator fails to turn off.40 The Jam indicator fails to turn off.CauseCassetteCassette 1paper sensor(PS2)Cassette 2paper sensor(PS4)DC controllerPCBChecksAre the cassettes set properly?Does the lifter move up?Is the paper sensor normal? (Seethe instructions on how to checkphotointerrupers.)Step123YES/NONONONOYESActionSet the cassettesproperly.See “The lifter fails tomove up.”Check the wiring fromthe DC controller PCB tothe sensor; if normal,replace the sensor.Replace the DCcontroller PCB.CauseJamSensorDC controllerPCBChecksFind out which sensor hasdetected the jam in service mode([1] No.109). Is paper found nearthe sensor?Is the sensor identified in step 1normal? (See the instructions onhow to check photointerrupers.)Step12YES/NOYESNOYESActionRemove the jam.Check the wiring fromthe DC controller to thesensor; if normal,replace the sensor.Replace the DCcontroller PCB.
