5. Controlling the DC Component Overcurrent of the Separation/Pre-TransferCorona CurrentIf an overcurrent flows into the separation/pre-transfer charging assembly, the high-voltage transformer stop signal (HVTOFF) is generated to cut off the corona current(DC/AC component) temporarily to the pre-transfer/separation charging assembly.When the HVOFF signal is generated, the copier continues to operate; application ofthe corona current will be resumed once the application voltage returns to normal.If leakage occurs because of a broken charging wire and, as a result, an overcurrentflows to generate the HVTOFF signal, the corona current will not be applied unless thecause is removed.Separation jams will be frequent if the corona current output to thetransfer/separation charging assembly is stopped because of an overcurrent.No warning will be issued to the control panel in response to this condition; ifseparation jams are frequent, check the relevant mechanism.Table 4-104 Combination of Transfer/Separation SignalsCOPYRIGHT © 1997 CANON INC. CANON NP6045 REV. 1 MAR. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4 IMAGE FORMATION SYSTEM4-16Note:Switching signal Control signalSignal* DCON HVT.POST.AC ACBTP ROED HVSTC HVT.POST.DCHVT output J114A-10 J114A-7 J114A-3 J114A-1 J114A-8 J114A-9Pre-transfer ON ‘1’ ‘1’ ‘0’ ‘1’ — 3~11VPre-transfer OFF ‘0’ ‘0’ ‘0’ ‘0’ — 2VSeparation ON ‘1’ ‘1’ ‘0’ ‘1’ 3~11V —Separation OFF ‘0’ ‘0’ ‘0’ ‘0’ 2V —
