Canon NP6621 Service Manual

Also see for NP6621: Service manual Service handbook

Contents

Canon NP6621 Service Manual Manual pdf 178 page image

3–122OPERATIONS AND TIMINGCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)Possible cause• Composite power supply (faulty)• DC controller (faulty)• Scanner cable (displacement,tear)• Scanner home position sensor(PS1; faulty)• Scanner motor (M2; faulty)• DC controller (faulty)• Lens cable (displacement, tear)• Lens home position sensor (PS2;faulty)• Slide shutter (faulty movement)• Blanking shutter home positionsensor (PS3; faulty)• Change solenoid (SL1; faulty)• Lens motor (M3; faulty)• DC controller (faulty)• Scanning lamp (faulty)• Composite power supply (faulty)• DC controller (faulty)• DC controller (faulty)• Composite power supply (faulty)• Power supply cooling fan (faulty)• DC controller (faulty)• Power supply frequency (fluctua-tion)• Composite power supply (faulty)• DC controller (faulty)• DC controller (faulty)• DF controller(faulty)• Connector (poor contact)• DC controller (faulty)• ASSIST controller (faulty)• Communication with ASSIST(faulty)• Composite power supply (faulty)• DC controller (faulty)Code DescriptionThe output value is different from the setting forthe high-voltage output of the composite powersupply.The scanner does not return to home positionwithin 5 sec when scanning operation isstarted.‘E002’ may be checked in service mode No.108.• The lens home position signal (LHP) is notgenerated within a specific period of timeafter the power switch has been turned ON.• The lens home position signal (LHP) is beinggenerated for more than a specific period oftime.• The blank shutter home position signal(BSHP) is not generated when the slideshutter is moved.• Activation of the lamp is detected duringstandby more than 22 sec.An error is detected in the communicationbetween the CPU (Q301) on the DC controllerand the CPU (U402) on the composite powersupply.The power supply cooling fan (FM3) remainsstationary for 10 sec or more because of anerror.The intervals of the zero-cross signal deviatesfrom the tolerance.Initialization of the IPC (Q311) fails at power-on.An error in the communication with the DFcannot be removed.• Communication with ASSIST after connec-tion fails.• A break is detected with ASSIST.The relay (KI) does not turn off when the powerswitch is turned off (ACOFF=0).E064E202(control panelkeys locked)E210E220E240E260E712E717E710E261E802Download service manual and resetter printer at http://printer1.blogspot.com