Brother MFC-9840CDW Service Manual

Confidential
2-4
2. PERIODICAL REPLACEMENT PARTS
2.1 Periodical Replacement Parts
Periodical replacement parts are the parts to be replaced periodically to maintain product
quality. These parts would affect the product quality if they loose their functionality even if they
do not appear to be damaged or there is no change in their appearance.
The periodical replacement parts listed in the table below should be replaced according to the
service life.
Parts Name LCD Q’ty Approximate Life
Replacement
Procedure
Fuser unit &
Toner filter frame ASSY
Fuser Unit 1 80,000 pages Refer to 2.2.1.
Laser unit Laser Unit 1 100,000 pages Refer to 2.2.2.
Paper feeding kit
*1
PF Kit 1, PF Kit 2 1 100,000 pages Refer to 2.2.3.
MP paper feeding kit
*2
PF Kit MP 1 50,000 pages Refer to 2.2.4.
*1
: The paper feeding kit includes the separation pad ASSY, separation pad spring and roller
holder ASSY.
*2
: MP Paper feeding kit includes the separation pad ASSY MP, separation pad spring MP, and
MP roller holder ASSY.
When replacing the periodical replacement parts, each of the counters need to be reset in
order to count the number of replacement times. Refer to “2.3 Parts Life Reset Function” in this
chapter.
Also make sure to wipe the dirt on the drum unit as shown in the figure below when replacing
each of the periodical replacement parts.
The number of printed pages of the machine can be checked by accessing the machine’s log
information on the LCD. (Refer to “1.4.23 Display of the Machine’s Log Information” (Function
code 80) in Chapter 5.) The actual number of printed page will vary depending on the type of
print job or the paper to being used. The figures indicated as the approximate life in the table
above are worked out when printing a general business document (with 5% print coverage) on
one side of A4-size paper.
Note:
- Always turn off the power switch of the machine and unplug the power cord from the power
outlet before replacing the periodical replacement parts.
- If the fuser unit is replaced after errors related to the fuser unit occur, it is necessary to leave
the machine power ON for ten minutes after part replacement. This will make the machine to
be released from errors.
- After disconnecting flat cables, check that each cable is not damaged at its end or short-
circuited.
- When connecting flat cables, do not insert them at an angle. After insertion, check that the
cables are not at an angle.

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