7. AE AdjustmentAdjust the AE mechanism using the following three service modes:q AE Basic AdjustmentNo. 410 .............scanner forward stopNo. 408 ........scanning lamp on checkNo. 208 .....AE sensor voltage displayNo. 301lamp intensity automatic adjustment at time of AE scanw Copy Density in AE Mode (No. 302)(developing bias) reference adjustmente Copy Density in AE Mode(developing bias) slope adjustmentIf the copy density is not optimum after executing AE basic adjustment q (No. 410,No. 408, No. 208, No. 301), execute w and then , if necessary, e, i.e., No. 302 and No.303.If you have replaced the AE sensor, scanning lamp, or DC controller, adjust thescanning lamp intensity (VR 301); then, execute AE basic adjustment q, scannerforward stop (No. 410), scanning lamp on check (No. 408), AE sensor voltage display(No. 208), and lamp intensity automatic adjustment (No. 301).Go through the following when making adjustments; Table 10-1 is a list of servicemodes excluding scanner forward stop (No. 410), list of service modes excludingscanner forward stop (No. 410), scanning lamp on check (No. 408), and AE sensorvoltage display (No. 208).a. AE Basic Adjustment (No. 410, No. 408, No. 208, No. 301)In this adjustment, the intensity of the scanning lamp is read by the lamp intensitysensor and the voltage of the AE sensor unit is adjusted by VR 391 on the DC controller.After the adjustment, execute the lamp intensity automatic adjustment for AE scans.1) Place the Test Sheet NA-3 on the copyboard, and close the copyboard.Adjust to the appropriate copy density in non-AE mode (settings) by suing biasadjustment knob “VR302”. Then press the service mode switch (SW302) to activateservice mode.2) Enter ‘4’ using the keypad, and press the AE key.• The display indicates ‘401’.3) Enter ‘410’ using the keypad.• The display indicates ‘410’.4) Press the Start key once.• The scanner moves forward.Caution:Each press moves the scanner forward; do not press more than once.5) Enter ‘408’ using the keypad, and press the Start key.• The display indicates ‘ON’, and turns off after about 1.5 sec.6) Press the Clear key twice.• The display indicates ‘4’.7) Press ‘2’ on the keypad, and press the AE key.• The display indicates ‘201’.10-11CHAPTER 10 TROUBLESHOOTINGCOPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
