Xerox Phaser 6128MFP Service Manual

Phaser 6128MFP Service Manual 2-7
Theory of Operation
Development
Toner is electrically attached to the invisible electrostatic latent image on the drum
surface to form the visible toner image on the drum.
The toner in the Toner Cartridge is agitated by the built-in agitator and fed into
the developer. The augers are driven by the Toner Motor and the developer motor
in the Main Drive. The toner to be consumed according to the print count is
calculated and fed into the developer. This process, called toner dispensation, is
controlled by two processes: pixel count dispense control (PCDC) and automatic
density control (ADC).
The toner fed into the developer and the carrier in the developer are agitated by
the auger, and supplied to the magnet roller arranged in the drum surface area.
The toner and carrier are charged by friction due to agitation (toner in negative,
carrier in positive), and they are attracted electrically. A uniform layer is formed by
the trimmer bar as the carrier magnetic substance is attracted to the magnetic
roller.
The magnet roller is covered by a thin semi-conductive sleeve. The developer bias
voltage is supplied to the sleeve by the HVPS. Developer bias is negative DC
voltage combined with AC voltage. The magnet roller is kept at constant negative
voltage against the photoreceptor layer of the drum by DC voltage. Therefore, at
the area on the drum surface where the negative electric charge does not
decrease, potential is lower than the magnet roller, while the potential is higher
than the magnet roller at the area where the negative charge on the drum surface
decreases. The AC voltage shakes the developer on the magnet roller surface,
causing the toner to transfer to the drum.
Thus, the negatively charged toner is attracted only to the area on the drum
surface (electrostatic latent image) where the negative charge is lower than the
charge on the magnet roller, forming the toner image on the drum. Once the toner
adheres to the drum, the negative charge of the toner-bearing location increases,
which decreases the potential and the toner-attracting force.
HVPS
s6128-006
: Negative Electric Charge
: Positive Electric Charge
: Toner
: Carrier
Trimmer Rod
Paddle
Toner Cartridge
Auger
Auger
Magnet Roller
Agitator
Drum

Xerox Phaser 6128MFP Specifications

General

Print technology	Laser
Maximum resolution	600 x 600 DPI
Economical printing	Yes
Time to first page (black, normal)	14 s
Time to first page (color, normal)	17 s
Print speed (black, normal quality, A4/US Letter)	16 ppm
Print speed (color, normal quality, A4/US Letter)	12 ppm
Scanner type	Flatbed scanner
Image formats supported	JPG, TIF
Copier resize	- %
Time to first copy (black, normal)	18 s
Copy speed (black, normal quality, A4)	16 cpm
Copy speed (color, normal quality, A4)	12 cpm
Faxing	Mono faxing
Fax speed dialing (max numbers)	200
Total input capacity	250 sheets
Total output capacity	150 sheets
Display	LCD
Market positioning	Business
Internal memory	384 MB
Card reader integrated	No
Sound pressure level (copying)	52.2 dB
Sound pressure level (printing)	14.9 dB
Maximum print size	216 x 297 mm
Paper tray media types	Bond paper, Card stock, Envelopes, Glossy paper, Labels, Plain paper
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Legal (media size), Letter (media size), Oficio (media size), Statement (140 x 216mm)
ISO A-series sizes (A0...A9)	A4, A5
JIS B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 216 g/m²
Power supply type	AC
Dimensions (WxDxH)	425 x 507 x 585 mm
Power requirements	120 V, 50/60 Hz
Networking features	Fast Ethernet
All-in-one functions	Copy, Fax, Scan
Standard media sizes	76.2 x 127 mm - 215.6 x 355.6 mm
Color all-in-one functions	copy, print, scan
Compatible operating systems	Windows 2000+ Mac OS X v10.3 - 10.5 Red Hat Enterprise Linux 5 Desktop SUSE Linux Desktop 10+
Dimensions (W x D x H) (imperial)	16.7 x 20 x 23 \
Acoustic power emissions (active, print, copy or scan)	62.2/30.3 dB
Standard interfaces	USB 2.0
USB 2.0 ports quantity	1
Power consumption (standby)	18.4 W
Power consumption (average operating)	360 W
Sustainability certificates	ENERGY STAR
Certification	EEC, FCC
Maximum duty cycle	40000 pages per month
Recommended duty cycle	3000 pages per month
Storage temperature (T-T)	-20 - 40 °C
Operating temperature (T-T)	10 - 32 °C
Non-operating relative humidity (non-condensing)	10 - 85 %