Ricoh M C250FW Field Service Manual

7.Detailed Descriptions
269
Process Control
Process Control Flow
Process control adjusts imaging processing conditions as required to maintain constant, uniform image
density. Process control comprises toner coverage control and MUSIC (Mirror Unit Skew and Interval
Correction) which ensures consistent color overlay.
Toner Coverage Control
1. The machine uses the temperature and humidity readings of the temperature/humidity sensor to
determine the correct bias for the application of charge to the surface of the drum to ensure that
the surface potential of the drum remains constant.
2. The machine creates differ toner patch patterns on the surface of the image transfer belt by varying
the bias charge, and then the TM/P sensor detects the amount of toner coverage in each patch to
determine the target development bias for optimum toner coverage. This is toner coverage process
control.
3. Next, a range of halftone toner patches are created on the image transfer belt by varying the
strength of LD exposures, the densities of these images are detected by the TM/P sensor, and then
the machine determines optimum LD power levels for creating the optimum densities for halftone
images. This is halftone process control.
MUSIC
In the MUSIC phase, first correction patterns are generated on the image transfer belt then the TM/P
sensors read the patterns. The machine uses these readings to measure and then correct the
positioning of the images exposed on the image transfer belt. (Refer to, MUSIC (Mirror Unit Skew and
Interval Correction))
TM/P Sensors
Three TM/P sensors are on a single board. The center sensor acts as an ID sensor and a MUSIC
sensor. The left and right sensors are used only for MUSIC.

Ricoh M C250FW Specifications

General

Duplex printing	Yes
Print technology	Laser
Maximum resolution	2400 x 600 DPI
Time to first page (black, normal)	9.4 s
Time to first page (color, normal)	9.8 s
Print speed (black, normal quality, A4/US Letter)	25 ppm
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Cabling technology	10/100Base-T(X)
Ethernet LAN data rates	10, 100 Mbit/s
Internal memory	256 MB
Printer fonts	PCL, PostScript
Printing colors	Black, Cyan, Magenta, Yellow
Duplex functions	Print
Maximum duty cycle	65000 pages per month
Number of print cartridges	4
Page description languages	PCL 5c, PCL 6, PostScript 3
AC input voltage	220 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (max)	1300 W
Power consumption (average operating)	- W
Energy Star Typical Electricity Consumption (TEC)	0.31 kWh/week
Copier resize	25 - 400 %
Maximum copy resolution	- DPI
Maximum number of copies	99 copies
Included cartridge capacity (black)	1000 pages
USB 2.0 ports quantity	1
Product color	Black, White
Market positioning	Home & office
Mac operating systems supported	Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra
Server operating systems supported	Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016
Windows operating systems supported	Windows 10, Windows 7, Windows 8.1
Scan to	E-mail, File, USB
Scan drivers	TWAIN
Scanner type	-
Faxing	Color faxing
Modem speed	33.6 Kbit/s
Fax transmission speed	3 sec/page
Total input capacity	250 sheets
Total output capacity	150 sheets
Maximum input capacity	751 sheets
Total number of input trays	2
Paper tray media weight	60 - 163 g/m²
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B4, B5
Maximum ISO A-series paper size	A4

Weight and Dimensions

Depth	493 mm
Width	420 mm
Height	473 mm
Weight	30000 g