Brother MFC-9840CDW Service Manual

Confidential
3-3
3. SCREW TORQUE LIST
Tightening Note:
When tightening any of the screws shaded in the table below, slowly turn it
counterclockwise (in the direction to loosen the screw) with your hand until you feel that
the screw is a little dropped in the hole. Then, slightly turn it clockwise (in the direction
to tighten the screw) with your hand and tighten it according to the specified torque with
a screwdriver.
Note:
For verifying the shape of each screw, refer to “APPENDIX 4 SCREW CATALOGUE”.
Location of screw Screw type Q'ty
Tightening torque
N m (kgf • cm)
Tray cover ASSY Taptite, bind B M4x12 2 0.80 ±0.1 (8 ±1)
Fuser unit Taptite, pan B M4x14 2 1.20 ±0.1 (12 ±1)
Back cover upper Taptite, cup S M3x8 2 0.80 ±0.1 (8 ±1)
Drive shaft holder Taptite, bind B M3x10 1 0.60 ±0.1 (6 ±1)
Taptite, cup B M4x12 2 1.20 ±0.1 (12 ±1) Paper eject ASSY DX
Taptite, cup S M3x6 1 0.80 ±0.1 (8 ±1)
Back cover ASSY Taptite, cup S M3x8 2 0.80 ±0.1 (8 ±1)
Transfer HVPS PCB unit Taptite, cup S M3x6 2 0.80 ±0.1 (8 ±1)
Earth plate 3 Taptite, bind B M3x8 1 0.60 ±0.1 (6 ±1)
Density shield plate 1 Taptite, bind B M3x8 2 0.60 ±0.1 (6 ±1)
Earth plate 2 Taptite, cup S M3x6 1 0.80 ±0.1 (8 ±1)
Registration-mark sensor PCB ASSY 1 Taptite, bind B M3x8 1 0.60 ±0.1 (6 ±1)
Registration-mark sensor PCB ASSY 2 Taptite, bind B M3x8 1 0.60 ±0.1 (6 ±1)
Density sensor Taptite, bind B M3x8 2 0.60 ±0.1 (6 ±1)
Registration relay PCB ASSY Taptite, bind B M3x8 1 0.60 ±0.1 (6 ±1)
Taptite, cup B M3x10 3 0.50 ±0.1 (5 ±1) Transfer HVPS PCB ASSY
Taptite, cup S M3x6 1 0.80 ±0.1 (8 ±1)
Taptite, cup B M4x12 3 1.20 ±0.1 (12 ±1) Side cover L ASSY
Taptite, cup S M3x8 1 0.80 ±0.1 (8 ±1)
Taptite, cup B M4x12 1 1.20 ±0.1 (12 ±1)
Taptite, cup S M4x8 1 1.20 ±0.1 (12 ±1)
Side plate LB
Taptite, cup S M3x6 3 0.80 ±0.1 (8 ±1)
Taptite, cup B M4x12 2 1.20 ±0.1 (12 ±1) Side cover R ASSY
Taptite, cup S M4x8 2 1.20 ±0.1 (12 ±1)
FG harness ADF Taptite, cup S M3x6 1 0.80 ±0.1 (8 ±1)
FG harness FB Taptite, cup S M3x6 1 0.80 ±0.1 (8 ±1)
Driver PCB ASSY Taptite, cup S M3x6 2 0.80 ±0.1 (8 ±1)
Hinge protection cover ASSY Taptite, cup B M4x12 3 0.80 ±0.1 (8 ±1)
Hinge Taptite, bind B M4x12 2 0.80 ±0.1 (8 ±1)
Taptite, bind B M4x12 1 0.80 ±0.1 (8 ±1) Hinge base R
Taptite, cup B M3x10 3 0.50 ±0.1 (5 ±1)
Taptite, bind B M4x12 1 0.80 ±0.1 (8 ±1) Hinge ASSY L
Taptite, cup B M3x10 3 0.50 ±0.1 (5 ±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