Brother MFC-9840CDW Service Manual

Confidential
1-12
Error code 31
Print Unable 31
Turn the power off and then back on again.
Density sensor failure
Error code 32
Print Unable 32
Turn the power off and then back on again.
Density sensor shutter performance malfunction
User Check
- Check if there is a scratch, dirt or the like on the belt unit. If there is, replace the belt unit with
a new one.
Step Cause
Remedy
1 Harness connection failure of
density sensor holder ASSY
Check the harness connection between the
density sensor holder ASSY and registration relay
PCB, and the one between the registration relay
PCB and engine PCB. Then, reconnect them.
2 Harness connection failure of
density sensor solenoid
ASSY
Check the harness connection between the engine
PCB and registration relay PCB and reconnect
them.
3 Density sensor holder ASSY
failure
Replace the density sensor holder ASSY.
4 Transfer HVPS PCB unit
failure
Replace the transfer HVPS PCB unit.
5 Engine PCB failure Replace the engine PCB ASSY.
Error code 33
Print Unable 33
Turn the power off and then back on again.
Color registration sensor failure
User Check
- Check if there is a scratch, dirt or the like on the belt unit. If there is, replace the belt unit with
a new one.
Step Cause
Remedy
1 Harness connection failure of
registration-mark sensor PCB
ASSY
Check the harness connection of the registration-
mark sensor PCB ASSY and reconnect it.
2 Registration-mark sensor
PCB failure
Check the performance of the registration-mark
sensor following the procedure described in
“Maintenance mode 75”. If any problem occurs,
replace the registration-mark sensor PCB ASSY.
3 Transfer HVPS PCB unit
failure
Replace the transfer HVPS PCB unit.
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