CHAPTER 4 IMAGE FORMATION SYSTEMCOPYRIGHT © 1999 CANON INC. CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-9B. Operation1. Switching AC Component of the Developing Bias ON/OFFThe square wave generator operates continuously while the copier remains ON.a) When ACBON*=1AC bias switch circuit goes OFF.Output from the square wave generator is cut off.So AC bias is not supplied to the developing cylinder.b) When ACBON*=0The AC bias switch circuit goes ON.The output of the square wave oscillator goes to the T2 drive circuit. This causes the AC high-voltage transformer to generate a 1300VAC AC bias, which is supplied to the developing cylinder.Also, the output of the AC high-voltage transformer is rectified and supplied to the staticcharge eliminator (approx. 3.2 kV).
