Brother MFC-9840CDW Service Manual

Confidential
1-43
3.4 Dirt on Paper
User Check
- Check if the paper is loaded into the paper tray correctly.
- Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray.
Step Cause
Check
Result
Remedy
Is there dirt around the
entrance of the fuser unit?
Yes Clean the entrance of the
fuser unit.
1 Fuser unit dirty
Is the pressure roller
ASSY dirty?
Yes Clean the pressure roller
ASSY.
2 Dirt on belt unit
electrode
Is the electrode of the belt
unit dirty?
Yes Clean the electrode of the
main body and the belt
unit.
3 Dirt on waste
toner box
electrode
Is the electrode of the
waste toner box dirty?
Yes Clean the electrode of the
main body and the waste
toner box.
4 Belt unit dirty Does dirt on the paper
disappear after replacing
the belt unit with a new
one?
Yes Replace the belt unit.
5 Toner leak from
the waste toner
box
Is the waste toner box full
of toner?
Yes Replace the waste toner
box. Check the near/full
sensor ASSY. Or, replace
the main PCB ASSY.
3.5 Wrinkles
User Check
- Check if the paper is loaded into the paper tray correctly.
- Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray.
Step Cause
Check
Result
Remedy
1 Fuser unit failure Do wrinkles on the paper
disappear after replacing
the fuser unit with a new
one?
Yes Replace the fuser unit.

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