Brother MFC-9840CDW Service Manual

Confidential
1-3
2. ERROR CODES
This machine includes a self-diagnosis function. If the machine does not work normally it
judges that an error has occurred, and indicates the corresponding error message on the LCD,
which in turn helps the end user to quickly find out the problem.
2.1 Error Indication
The error codes shaded in the table below are recoverable errors if following the User Check
items.
Error
codes
Problem
Refer
to:
Error
codes
Problem
Refer
to:
20 Laser diode failure
(
K
)
1-8
21 Laser diode failure (Y) 1-8
57 Paper jam while turning it over in
duplex printing or DX solenoid failure
1-16
22 Laser diode failure (M) 1-8 58 Fuser unit failure 1-16
23 Laser diode failure (C) 1-8 59 Fuser unit failure 1-16
24 Internal temperature sensor failure 1-8 5A Charge HVPS PCB ASSY failure 1-17
25 Develop drive motor failure 1-9 5E Replace the belt unit 1-6
26 Belt drive motor failure 1-9 5F Replace the waste toner box 1-17
27 Paper feed/belt cleaner motor failure 1-9 60 Toner cartridge (C) is at the end of life. 1-18
28 Drum drive motor 1 (K, Y) failure 1-9 61 Toner cartridge (M) is at the end of life. 1-18
29 Drum drive motor 2 (M, C) failure 1-9 62 Toner cartridge (Y) is at the end of life. 1-18
2A Belt cleaner release sensor failure 1-10 63 Toner cartridge (K) is at the end of life. 1-18
2B Air intake fan (AIR) failure 1-10 64 Replace the toner cartridge (C) 1-18
2C Toner sensor PCB failure (K) 1-11 65 Replace the toner cartridge (M) 1-18
2D Toner sensor PCB failure (Y) 1-11 66 Replace the toner cartridge (Y) 1-18
2E Toner sensor PCB failure (M) 1-11 67 Replace the toner cartridge (K) 1-18
2F Toner sensor PCB failure (C) 1-11 68 Fuser unit failure 1-19
30 Incorrect EL lamp current value 1-11 69 Fuser unit failure 1-19
31 Density sensor failure 1-12 6A Fuser unit failure 1-19
6B Fuser unit failure 1-1932 Density sensor shutter performance
malfunction
1-12
6C Fuser unit failure 1-19
33 Color registration sensor failure 1-12 6D Fuser unit failure 1-19
34 Color adjustment shutter failure 1-13 6E Fuser unit failure 1-19
35 NVRAM failure on Engine PCB 1-13 6F Fuser unit failure 1-19
36 Transfer HVPS PCB failure 1-13 71 Polygon motor failure 1-20
37 Belt unit temperature sensor failure 1-13 72 Beam detecting sensor (K) failure 1-20
38 THM sensor failure 1-14 73 Beam detecting sensor (C) failure 1-20
39 HUM sensor failure 1-14
3A Engine communication error 1-14
74 Toner cartridge whose color is used
reaches the end of life during printing.
1-21
3B Main PCB RAM failure 1-15 75 Machine cooling down inside 1-6
3D Main PCB failure 1-15 76 Fuser unit failure 1-21
3F Writing error into engine firmware 1-15 78 Fuser unit failure 1-21
50 Replace the drum unit 1-5 7C Engine communication error 1-14
51 Replace the MP paper feeding kit 1-5 7D Dirt on drum unit 1-22
52 Replace the T1 paper feeding kit 1-5
53 Replace the LT paper feeding kit 1-5
54 Replace the fuser unit 1-6
55 Replace the laser unit 1-6
82 Density patch measurement is not
completed normally when
implementing calibration from the
control panel.
1-22
56 Back cover opened 1-15 84 Paper jam rear side of the machine 1-23

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