CHAPTER 11 TROUBLESHOOTING11-423) Press the user mode key ].• Non-auto control mode starts.NIP : 0 ← (] : START)PO_CONT : 1 ← (] : START)4) Press the Reset key twice.Caution:When non-auto control mode is executed, all control (corona current, intensity,developing bias) is set to default settings stored in ROM.w Using Non-Auto Control ModeUse non-auto control mode to find out if a fault, if any, is on the input or the outputside of the microprocessor on the DC controller PCB.c. Zero-Level CheckYou may use a zero-level check to find out whether the surface potential controlcircuit is good or not.Reference:In a zero-level check, a check is made to find out whether the microprocessoridentifies a 0V condition when the surface potential of the drum is 0 V.Using a zero-level check, you can find out whether the microprocessor on the DCcontroller PCB or the measuring unit is good or not.A zero-level check may be either of the following:Method 1 enables you to check the lever shift circuit on the DC controller, whilemethod 2 enables you to check the potential measurement circuit.COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
