Xerox PHASER 6121MFP, Service Manual

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2-24 Phaser 6121MFP Service Manual
Theory of Operation
An electrical charge is applied to the drum by an electrode mounted near the
drum. This charge attracts toner from the Toner Cartridge developer roller. The
image stabilization control process controls the grid voltage (Vg) applied to the
electrode’s grid mesh.
Imaging Unit Life
A counter tracks the number of prints since the last detection of a new Imaging
Unit. As this count nears its maximum value, the system generates a warning
message. When the count reaches the maximum value, a replacement error is
generated. The counter is reset following the detection of a new Imaging Unit.
The system checks for a new Imaging Unit when the Power Switch is turned On or
the front door is closed. If a new Imaging Unit is detected, the image stabilization
sequence is carried out.
The life counter is reset when a new Imaging Unit is detected. When a
predetermined number of printed pages are produced after the life value has been
reached, the machine displays a Imaging Unit replacement message.
s6121mfp-124
Cleaning Blade
s6121mfp-282
Grid Mesh