CHAPTER 10 TROUBLESHOOTINGCOPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-5531. indicator does not go OFFActionDisconnect the shorting.Either 24VDC or GNDis not connected to thecontrol card unit.Explain to the user thatthe indicator will not goOFF unless a card otherthan a department card isinserted.Continue with step 7.Use another card.Replace the control cardcontroller PCB.Replace the control cardcontroller PCB.Is the Control Card Vnormal?• Use another card orchange the upper limit.Replace the control cardcontroller PCB.Check the wiring be-tween the socket and theDC controller PCB.Replace the DC control-ler PCB.ResultNoNoNoYesNoNoYesNoNoYesCheckIs anything displayed on the control carddisplay?Is a department card being used?Take the card out completely; then, insertit once again. Does "-EE-" appear on thecontrol card display?Is there dirt on the card PCB, or is it bro-ken, etc.?Does the display in step 4 flash?Borrow the upper limit setting card fromthe user and check the departmental upperlimit flashing in step 5. Has the number ofcopies reached the upper limit?Set the power switch OFF. Put a test con-trol counter into the socket. DisconnectJ314 from the DC controller. Set the meterto the Ω × 1 range. Connect the leads toJ316-1 and J504-4, and J316-2 and J504-3. Does the meter indicate 0Ω?Procedure1234567Cause/ProblemareaControl Cardunit powersupplyOperationCardCard sensorPCBControllerPCBControllerPCBWiringDC controllerPCB
