Brother MFC-9840CDW Reference Manual

Confidential
Ref. 2-18
3.4 Toner Cartridge
3.4.1 Methods for Detecting and Counting Toner Life
“Toner Life End” is displayed through the following two ways. First, such indication is displayed
when detection is performed by the toner sensor; second, it is displayed at the time when a
rotation rate of the develop roller reaches its upper limit.
(1) Detection by the toner sensor
The amount of toner remaining can be detected by checking the imperviousness to light of
the toner in the cartridge by means of the transmissive photosensor.
(2) Detection by means of rotation rates of the develop roller reached its upper limit
The upper limit of such rotation rates can be detected before the develop roller becomes
unusable due to wear.
<When a new toner cartridge is inserted after “Toner Life End” is displayed>
Corresponding counter, Setting value Operation
Counter of toner cartridge changes +1
Page counter for each toner cartridge Reset (0)
Coverage for each toner cartridge Reset (0)
Developing bias voltage Reset (Initial setting)
<When a toner cartridge in use is inserted after “Toner Life End” is displayed by toner
sensor detection *
1
>
A count value before changes is continuously indicated as a rotation rate of the develop roller.
Irrespective of the amount of toner, printing becomes disabled when the rotation rate reaches
the upper limit.
Corresponding counter, Setting value Operation
Counter of toner cartridge changes No count up
Page counter for each toner cartridge Continued
Coverage for each toner cartridge Continued
Developing bias voltage Reset (Initial setting)*
2
*
1
Excluding a toner cartridge in use in which there is a little toner remained.
*
2
The developing bias voltage is reset to the initial setting once when a toner cartridge in use
is inserted. After resetting, the developing bias voltage correction is performed so that the
developing bias voltage is corrected according to the amount of toner.
Note:
The descriptions in the above tables apply to all four colors.

Brother MFC-9840CDW Specifications

General

Print technology	Laser
Maximum resolution	600 x 2400 DPI
Economical printing	Yes
Time to first page (black, normal)	16 s
Time to first page (color, normal)	17 s
Print speed (black, normal quality, A4/US Letter)	20 ppm
Scan to	E-mail, FTP, OCR, USB
Scanner type	Flatbed scanner
Grayscale levels	256
Input color depth	48 bit
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	1200 x 2400 DPI
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
N-in-1 copy function (N=)	4, 9, 16, 25
Copy speed (black, normal quality, A4)	16 cpm
Faxing	Mono faxing
Fax memory	400 pages
Modem speed	33.6 Kbit/s
Fax speed dialing (max numbers)	300
Total input capacity	250 sheets
Total output capacity	150 sheets
Multi-Purpose tray input capacity	50 sheets
Auto document feeder (ADF) input capacity	35 sheets
Internal memory	128 MB
Sound power level (standby)	30 dB
Sound pressure level (printing)	54.5 dB
Custom media sizes	(69.9 - 216mm) - (116 - 406.4mm)
Dimensions (WxDxH)	530 x 539 x 520 mm
Networking features	10/100Base-TX
Wireless technology	IEEE 802.11b/g
All-in-one functions	Copy, Fax, Scan
Maximum internal memory	0.640 GB
Color all-in-one functions	copy, print, scan
Media weight (tray 1)	60 - 105g/m2
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Recycled paper
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Legal (media size), Letter (media size)
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6
JIS B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 163 g/m²
Security algorithms	LEAP
Supported network protocols (IPv4)	TCP/IP (IPv4 & IPv6)
Standard interfaces	USB 2.0
USB 2.0 ports quantity	1
Bundled software	ScanSoft PaperPort (Win) NewSoft Presto! PageManager (Mac)
Power consumption (PowerSave)	36 W
Power consumption (average operating)	515, 100 W
Package weight	45800 g
Digital sender	No
Maximum duty cycle	3000 pages per month
Market positioning	Business