Brother MFC-9840CDW Service Manual

Confidential
5-42
2.2 Develop Roller/ Developing Bias Voltage Counter Reset Function
Since print density is likely to become darker as the toner gets older, the developing bias is
lowered by degrees (bias voltage is reduced) according to the number of develop roller
rotations so that an almost fixed density can be maintained from the beginning to the end. The
developing bias voltage can be verified in the display of log information (Function code 80).
In the case that the toner cartridge is replaced with a new one, the develop roller counter and
developing bias voltage are reset at the same time. This function allows you to reset these
manually.
Panel Operation Function
Pressing the Clear/Back button while the front
cover is being opened.
Menus of the develop roller counter reset
<Operating Procedure>
(1) Press the Clear/Back button while the front cover is being
opened.
(2) The “Reset Menu” appears on the LCD. Press the
or
buttons to select the appropriate toner cartrige, and then
press the OK button.
LCD Description
B.TNR-S Reset the develop roller counter of standard black
toner cartrid
g
e.
B.TNR-H Reset the develop roller counter of high-capacity
black toner cartridge.
C.TNR-S Reset the develop roller counter of standard cyan
toner cartridge.
C.TNR-H Reset the develop roller counter of high-capacity
cyan toner cartridge.
M.TNR-S Reset the develop roller counter of standard
magenta toner cartridge.
M.TNR-H Reset the develop roller counter of high-capacity
magenta toner cartridge.
Y.TNR-S Reset the develop roller counter of standard yellow
toner cartridge.
Y.TNR-H Reset the develop roller counter of high-capacity
yellow toner cartridge.
(3) The “B.TNR-S / 1. Reset 2. Exit” will appear on the LCD. If
resetting the counter, press the 1 button. If not, press the 2
button.
(4) The counter is reset when pressing the 1 button.
(5) The machine returns to the status that the front cover is
opened.
Note:
If there is no operation for 60 seconds or more, the machine automatically returns to step (1).

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