Brother MFC-9840CDW Service Manual

Confidential
5-43
2.3 Drum Unit Cleaning Mode
<Function>
This mode is to remove the dust attached on the exposure drum. When white spots appear on
the printout, perform this operation to remove the dust by using the drum cleaning sheet.
<Operating Procedure>
(1) Load the drum cleaning sheet into the MP tray.
(2) Check that the Status LED lights in green and press the
and Clear/Back buttons at the
same time. “DRUM CLEANING” will appear on the LCD.
(3) Press the Black Start button. The machine starts cleaning the drum unit.
“DRUM CLEANING / PLEASE WAIT” appears on the LCD during cleaning.
(4) When finishing cleaning normally, “DRUM CLEANING / COMPLETE” appears on the
LCD.
(5) Press the Stop/Exit button so that the machine returns to the ready state.
2.4 Fuser Motor Speed Adjustment Mode
<Function>
The problem such as dirt on the paper bottom or the unexpected print image due to a paper
crease may be occurred when printing the thin paper. This mode allows you to change the
speed of the fuser motor (Paper feed/belt cleaner motor ASSY) according to the respective
problems.
<Operating Procedure>
(1) Press the 2 and 8 buttons at the same time while the front cover is opened.
“FU MOTOR SPEED / 0 ” will appear on the LCD.
(2) Press the ▲or ▼ button to choose the setting value and press the OK button.
“FU MOTOR SPEED / Accepted” will appear on the LCD, and the setting value is saved.
- Dirt on the paper bottom
Increase the fuser motor speed. (Setting value: 1, 2, 3)
- Unexpected print image due to a paper crease
Reduce the fuser motor speed. (Setting value: -1, -2, -3)
Note:
Make sure to return the setting value to “0” after printing the thin paper.
Failure to do so may cause color misregistration or dirt on the paper.

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