12. E030 (The total copy counter fails to turn on.)13. E031 (The option counter has an open circuit.)CHAPTER 11 TROUBLESHOOTING11-90 COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CauseOption counterTotal copycounterDC controllerPCBChecksTurn off the power switch, and dis-connect J104 from the DC con-troller. Set the meter to the × 1KΩrange, and measure theresistance between J104-B6 andJ104-B7. Is it about 500Ω?Connect J104 to the DC controllerPCB, and turn on the powerswitch. Set the meter to the30VDC range, and measure thevoltage between J104-B6 (+) andJ104-A6 (–) on the DC controllerPCB. Does it change from about24 V to about 0 V and then toabout 24 V?Step12YES/NONOYESNOActionCheck the wiring fromthe DC controller PCB tothe total copy counter; ifnormal, replace the totalcopy counter.Replace the total copycounter.Replace the DCcontroller PCB.CauseTotal copycounterTotal copycounterDC controllerPCBChecksTurn off the power switch, and dis-connect J104 from the DC con-troller. Set the meter to the × 1KΩrange, and measure theresistance between J104-B2 andJ104-B1. Is it about 500Ω?Connect J104 to the DC controllerPCB, and turn on the powerswitch. Set the meter to the30VDC range, and measure thevoltage between J104-B2 (+) andJ104-A6 (–) on the DC controllerPCB. When the Copy Start key ispressed, does it change fromabout 24 V to about 0 V and thento 24 V?Step12YES/NONOYESNOActionCheck the wiring fromthe DC controller PCB tothe total copy counter; ifnormal, replace the totalcopy counter.Replace the total copycounter.Replace the DCcontroller PCB.
