Brother MFC-9840CDW Service Manual

Confidential
1-15
Error code 3B
Print Unable 3B
Turn the power off and then back on again.
Main PCB RAM failure
Step Cause
Remedy
1 Main PCB failure Replace the main PCB ASSY.
Error code 3D
Print Unable 3D
Turn the power off and then back on again.
Main PCB failure (Any of the PCBs is judged to be failure by the PCB checker, or it is not tested
with the checker.)
Step Cause
Remedy
1 Main PCB failure Replace the main PCB ASSY.
2 Engine PCB failure Replace the engine PCB ASSY.
Error code 3F
Print Unable 3F
Turn the power off and then back on again.
Writing error into engine firmware
Step Cause
Remedy
1 The machine is turned off
while rewriting the data into
the engine firmware.
Turn the power on. Resend the engine firmware
(DJF format) with the USB memory while the error
code is being indicated.
Error code 56
Cover is Open
Close the Back Cover.
Back cover opened
User Check
- Check if the back cover is closed correcty.
Step Cause
Remedy
1 Back cover switch failure Check the sensor performance following the
procedure described in “Maintenance mode 32”.
2 Harness connection failure of
back cover switch ASSY
Check the harness connection of the back cover
switch ASSY and reconnect it.
3
The boss pressing back cover
switch is broken.
Replace the back cover ASSY.
4 Engine PCB failure Replace the engine PCB ASSY.

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