CHAPTER 11 TROUBLESHOOTINGCOPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-9735 The lens fails to move.CauseRailDrive beltDC powersupply PCBLens motor(M3)Motor driver 1PCBDC controllerPCBChecksTurn off the power switch, andmove the pulley of the lens motorby hand. Does the lens movesmoothly?Is the drive belt attachednormally?Is a voltage of about 24 V presentbetween J201-1 (+) and J201-2 (-)on the motor driver PCB?Replace the lens motor. Is theproblem corrected?Replace the motor driver 1 PCB.Is the problem corrected?Step12345YES/NONONONOYESYESNOActionCheck the rail for foreignmatter and dirt.Re-attach it.Check the wiring fromJ201 to the DC powersupply; if normal, see“DC power is absent.”End.End.Check the wiring fromthe DC controller PCB tothe motor driver 1 PCBand from the motordriver 1 PCB to the lensmotor; if normal, replacethe DC controller PCB.
