Brother MFC-9840CDW Service Manual

Confidential
1-10
Error code 2A
Print Unable 2A
Turn the power off and then back on again.
Belt cleaner release sensor failure
Step Cause
Remedy
1 Rotation defective of release
shaft A of waste toner box.
Replace the waste toner box.
2 Harness connection failure
between belt cleaner release
sensor PCB and belt cleaner
release solenoid.
Check the harness connection between the belt
cleaner release sensor PCB and belt cleaner
release solenoid and reconnect them.
3 Belt cleaner release sensor
actuator performance
defective
Replace the belt cleaner release ASSY.
4 Belt cleaner release sensor
PCB failure
Check the sensor performance following the
procedure described in “Maintenance mode 32”. If
any problem occurs, replace the belt cleaner
release sensor PCB ASSY.
5 Belt cleaner release solenoid
failure
Replace the belt cleaner release ASSY.
6 Engine PCB failure Replace the engine PCB ASSY.
Error code 2B
Print Unable 2B
Turn the power off and then back on again.
Air intake fan (AIR) failure, or short-circuit of fuser unit fan (FU), LVPS fan (PS), or drum unit
fan (OPC)
Step Cause
Remedy
1 Air intake fan (AIR) harness
connection failure
Check the harness connection of the air intake fan
(AIR) and reconnect it.
2 Short-circuit of air intake fan
(AIR), fuser unit fan (FU),
LVPS fan (PS), or drum unit
fan (OPC)
Check if the harness terminal of any of these fans
is short-circuited using the tester.
If any of the fans is short-circuited, replace the
short-circuited fan and the engine PCB ASSY at
the same time.
The harness terminals that must be checked are:
- Air intake fan (AIR): Between 1 and 3 pins
- Fuser unit fan (FU): Between 1 and 2 pins
- LVPS fan (PS): Between 1 and 2 pins
- Drum unit fan (OPC): Between 1 and 2 pins
3 Air intake fan (AIR) failure If no fans are short-circuited in Step 2, replace the
air intake fan (AIR).
4 Engine PCB failure If no fans are short-circuited in Step 2, 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