Canon PC430 Service Manual - Page 73
F, Adjusting the AE Mechanism VR602, VR603
UPC - 030275150322
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CHPTER 4 IMAGE FORMATION SYSTEM The microprocessor takes measurements of the AE signals four times every 1.5 mm, and generates the developing DC bias control command (DCBPWM) to suit the average document density. See Figure 4-102F for the points at which the document density is measured in relation to the copyboard glass. 6 mm 30 mm (approx.) 33.5 mm (approx.) : Points of measurement Figure 4-102F 3. Adjusting the AE Mechanism (VR602, VR603) You must adjust the AE mechanism if you have replaced the scanning lamp unit, control panel PCB, or intensity/AE sensor; see p.10-8. Note: Adjust the AE mechanism only after adjusting the intensity of the scanning lamp. COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-15