I OPERATIONS AND TIMING IIII. IMAGE FORMATIONSYSTEMA. OutlineThe basic structure of the image forma-tion system is as shown below.Scanning lamp control systemPrimary/transfer corona current and gridbias voltage control systemControlling developing biasDocument density measurement systemDeveloping assembly/Drum cleanerBlankingWhen shorted,signal sent toindicate blackdevelopingassembly.Figure 3-163-18 COPYRIGHT© 1992 CANON INC. CANON NP-1550 REV.1 SEPT. 1992 PRINTED IN JAPAN (IMPRIME AU JAPON)