5. Controlling the DC Component of the Separation/Pre-Transfer Corona CurrentIf an overcurrent flows into the separation/pre-transfer charging assembly, the high-voltage stop signal (HVTOFF) is generated to temporarily stop the corona current(DC/AC component) applied to the pre-transfer/separation charging assembly.When HVOFF is generated, the copier continues to operate, and the application ofthe corona current will be resumed when the application current returns to normal.If leakage occurs because of an overcurrent caused by a broken charging wire or thelike, and HVTOFF continues as a result, the application will not be resumed unless thecause is removed.When the corona current applied to the transfer/separation charging assemblystops because of an overcurrent, separation jams tend to occur frequently.Since the control panel will not indicate any message, check the relevantmechanisms if separation jams are frequent.*Output from the DC controller PCB (connector of signal name).Table 4-104 Combinations of Transfer/Separation SignalsCOPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4 IMAGE FORMATION SYSTEM4-18Switching signals Control signalsSignal* 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’ ‘1’ ‘0’ — 3~11VPre-transfer OFF ‘0’ ‘0’ ‘0’ ‘0’ — 2VSeparation ON ‘1’ ‘1’ ‘1’ ‘0’ 3~11V —Separation OFF ‘0’ ‘0’ ‘0’ ‘0’ 2V —
