40. The scanner fails to move forward.41. The scanner fails to move in reverse.CHAPTER 11 TROUBLESHOOTING11-106 COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CauseCableScanner pathScanner motor(M3)DC controllerPCBChecksIs the scanner drive cable routedcorrectly?Is the scanner rail free of dirt?Does the scanner move smoothlywhen pushed by hand?Set the meter to the 12VDCrange, and connect the probes ofthe meter to the terminals shown.Does the voltage change whenthe Copy Start key is pressed?Step123YES/NONONOYESNOActionRoute the cablecorrectly.Is the surface of thescanner rail soiled? Isthere foreign object thatcomes into contact withthe scanner. Asnecessary, clean,lubricate, or correct.Reference:If the surface of the railis soiled, clean it withalcohol, and apply asmall amount of lubri-cant.Replace the scanner.motor.Check the wiring fromthe DC controller PCB tothe scanner motor; ifnormal, replace the DCcontroller+ – VoltageM3ON J112-B6 J112-B3 about 0 to 5 VM3F/R J112-B7 J112-B3 about 0 toabout 5 to 0 VCauseDC controllerPCBScanner motor(M3)ChecksDoes the scanner move forward?Set the meter to the 12 VDCrange. Does the voltage betweenJ112-B7 (+) and J112-B3 (–) onthe scanner controller PCBchange to about 5 V when thescanner stops moving forward?Step12YES/NONONOYESActionSee “The scanner fails tomove forward.”Replace the DC con-troller PCB.Check the wiring fromthe DC controller PCB tothe scanner motor; ifnormal, replace thescanner motor.
