CHAPTER 4 IMAGE FORMATION SYSTEMCOPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-13D. AdjustmentMake the following adjustments when the AE sensor or the DC controller PCB has been re-placed.1) Remove the potentiometer cover at the back of the left cover.2) Set the power switch ON.• Wait until the WAIT period has ended.3) Place an NB-3 or NA-2 test sheet on the copyboard, and lower the copyboard cover.4) Press switch SW 300 on the DC controller PCB.• "0" will appear on the COPY COUNT/RATIO indicator on the control panel.• If "0" does not appear, press the "0" number key on the control panel so that "0" appears.5) Press the SORT/GROUP key on the control panel.• The scanner will move forward to the AE measuring position; then, the scanning lamp will goON. (Note)6) Adjust VR 301 on the DC controller so that "22" appears on the COPY COUNT/RATIO indi-cator.Figure 4-5037) Press the SORT/GROUP key.• The scanning lamp will go OFF, and the scanner will return to the HOME position.8) Remove the test sheet, place a sheet of newspaper on the copyboard, and lower the copyboardcover.9) Press the SORT/GROUP key.• The copier will perform the same operations as described in step 5).10) Make a note of the numerical value displayed on the COPY COUNT/RATIO indicator.11) Press the SORT/GROUP key.• "0" will appear on the COPY COUNT/RATIO indicator.12) Press the "1" number key.• "1" will appear on the COPY COUNT/RATIO indicator.13) Enter the value recorded in step 10) using the numeric keypad.Figure 4-5047.7For reference:Copy density5Test sheet Sheet of newspaperDocument densityVR3017.7Copy density5Test sheet Sheet of newspaperDocument density: when the setting is lowered.: when the setting is raised.
