3–106OPERATIONS AND TIMINGCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)7. Recording on the Service LabelFigure 3-601 shows the label attached behindthe front door. Each machine is adjusted and set atthe factory, and the appropriate values are re-corded on the label.Be sure to record any new settings you enteredin the field on the label. Further, if you have replacedthe DC controller, be sure to enter the settingsrecorded on the label.If you have replaced the drum unit or the com-posite power supply, be sure to enter the settingsrecorded on the labels attached to the drum unit orcomposite power supply (service parts), and recordthese settings on the label.4. Using Adjustment Mode (‘3’) andMachine Settings Mode (‘5’)1) Press the numeric keypad to change the num-ber.• The number flashes.• If the number is negative, ‘%’ turns ON. Toenter a negative number, press the % key andenter the number on the numeric keypad.2) Press the AE key.• The machine stores the value and stopsflashing the value.• A press on the Start key starts copying opera-tion.3) To change the number once again, repeatsteps 1) and 2).4) Press the Clear key to return to item selection.5. Using Operation/Inspection Mode(‘4’)1) Press the Start key to execute the selectedservice mode.2) Press the Stop key to stop and return to itemselection.• If the mode is designed to stop automatically,the machine stops and automatically returnsto item selection.6. Resetting Error Codes (back-upcodes)If ‘E000’, ‘E001’, ‘E002’, ‘E003’, or ‘E004’ isindicated, remove the cause of the error and resetthe code that has been backed up.1) Open the front door, and insert the door switchactuator.2) While holding down the service mode switch(SW850) on the service PCB with a hex key,press the power switch.3) Turn OFF/ON the power switch.Program302303304305306307308309310311312315316318319320321322323324325326327328MeaningAE curve shiftAE curve slopeFixing offset temperatureRegisterLeading edgeRegister B-sideLeading edge B-sideTrailing edgeStack-bypass tailBlank homeBlank home reductionAPVC voltageAPVC currentATVC compensationStack-bypass loopMain register loopC1_cl_offC2_cl_offC3_cl_offDuplex paper stack adjDuplex inversion rollerHalogen lamp intensityDuplex input loopDuplex output loopFigure 3-602Value
