DRUM UNIT
B234/B235/B236/D101/D102/D103 6-78 SM
6.11.8 PROCESS CONTROL
Drum potential gradually changes for the following reasons:
• Dirty optics, exposure glass
• Dirty charge corona casing, grid plate
• Deterioration of drum sensitivity
When Does Auto Process Control Execute?
Process control is executed under the following conditions:
• When the machine is turned on with the fusing temperature at less than 100°C
and automatic process control is enabled (SP3901 001 switched on).
• After the machine has remained on and idle for over 24 hours (SP2966 001) and
automatic process control is enabled (SP3901 001 switched on).
• When the service technician executes SP2962 to force process control execution
manually.
• After the power is turned off/on to reset the machine after a pre-charge unit
related SC code has occurred (SC312, SC313). (SP2002 001 is set to "0" (Off)
and the ID sensor is not adjusted.)
• When the speed of the rotation of the drum is changed (Normal Æ Low Speed,
Low Speed Æ Normal Speed) after pressing the [Start] key. (The ID is not
adjusted.)
However, if auto process control fails (SP3902 001 displays a "0"), the auto
process control will not execute even if the drum speed changes.
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