Brother DCP 8085DN Service Manual

3-46
Confidential
5.3 Troubleshooting Image Defect
Image defect related problems are end user recoverable if following the User Check items. If
the same problem occurs, follow each procedure in the order of the number described in the
Step column in the tables below.
■ Light
<User Check>
- Check the machine's environment. Low temperature and low
humidity conditions can cause this problem.
- If the whole page is light, toner save mode may be on.
- Replace the toner cartridge or drum unit with a new one.
Step Cause Check
Result Remedy
1
Dirt on exposure
drum electrode
Are the electrodes of the
drum unit and machine
body dirty?
Yes
Clean both electrodes.
(Refer to Fig. 3-2, Fig. 3-3.)
2
Dirt on scanner
windows of the
laser unit
Is the scanner windows
of the laser unit dirty? Yes
Wipe the dirt off with a soft,
clean, lint free cloth.
(Refer to Fig. 3-6.)
3
Toner sensor
failure
After replacing the toner
cartridge with a new
one, does the same
problem occur even
after printing several
pages?
No
Replace the toner
cartridge.
4
Does the machine start
printing even after
removing the toner
cartridge from the drum
unit?
Yes
Clean the toner sensor.
(receiving light side /
emitting light side)
Check the harness
connection of the toner
LED PCB ASSY.
(luminescence side)
Replace the toner sensor
PCB ASSY or toner LED
PCB ASSY.
5
Between the
HVPS PCB/Main
PCB connection
failure
Is the harness of the
HVPS PCB ASSY and
main PCB ASSY
connected correctly?
Yes
Reconnect the harness of
the HVPS PCB ASSY and
main PCB ASSY.
6
HVPS PCB
failure
Is the problem solved
after replacing the
HVPS PCB ASSY?
Yes
Replace the HVPS PCB
ASSY.
7
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
8
Laser unit failure Is the problem solved
after replacing the laser
unit?
Yes
Replace the laser unit.

Brother DCP 8085DN Specifications

General

Print technology	Laser
Maximum resolution	1200 x 1200 DPI
Economical printing	Yes
Time to first page (black, normal)	8.5 s
Print speed (black, normal quality, A4/US Letter)	30 ppm
Scan to	CIFS, E-mail, FTP, Image, OCR, USB
Scanner type	Flatbed scanner
Grayscale levels	256
Input color depth	48 bit
Output color depth	24 bit
Image formats supported	BMP, JPG
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	600 x 2400 DPI
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
N-in-1 copy function (N=)	2
Copy speed (black, normal quality, A4)	30 cpm
Total input capacity	250 sheets
Total output capacity	150 sheets
Auto document feeder (ADF) input capacity	50 sheets
Internal memory	64 MB
Maximum internal memory	576 MB
Sound power level (standby)	30 dB
Sound pressure level (printing)	56 dB
Display	TFT
Market positioning	Business
Maximum print size	216 x 356 mm
Media weight (tray 1)	60 - 105 g/m²
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Transparencies
Non-ISO print media sizes	Executive
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 163 g/m²
Dimensions (WxDxH)	531 x 451 x 475 mm
All-in-one functions	Copy, Scan
Compatible operating systems	Windows 2000 Professional, XP Home Edition, XP Professional Edition, XP professional x64 Edition, Vista Mac OS X 10.3.9 + Linux
Supported network protocols (IPv4)	ARP, RARP, BOOTP, DHCP, APIPA(Auto IP), WINS/NetBIOS name resolution, DNS Resolver, mDNS, LLMNR responder, LPR/LPD, Custom Raw Port/Port9100, IPP/IPPS, FTP Client and Server, TELNET Server, HTTP/HTTPS server, SSL/TLS, TFTP client and server, SMTP Client, APOP, POP before SMTP, SMTP-AUTH, SNMPv1/v2c/v3, ICMP, LLTD responder, Web Services (Print), CIFS Client, SNTP
Supported network protocols (IPv6)	NDP, RA, DNS resolver, mDNS, LLMNR responder, LPR/LPD, Custom Raw Port/Port9100, IPP/IPPS, FTP Client and Server, TELNET Server, HTTP/HTTPS server, SSL/TLS, TFTP client and server, SMTP Client, APOP, POP before SMTP, SMTP-AUTH, SNMPv1/v2c/v3, ICMPv6, LLTD responder, Web Services (Print), CIFS Client, SNTP
Standard interfaces	Ethernet, Parallel, USB 2.0
USB 2.0 ports quantity	1
Bundled software	Brother MFL-pro suite in Windows: BrotherControlCentre 3 Scansoft Paperport 11SE + OCR, Macintosh:BrotherControlCentre 2 Newsoft Presto! Page manager 7
Power consumption (standby)	85 W
Power consumption (PowerSave)	16 W
Power consumption (average operating)	680 W
Package weight	21800 g
Maximum duty cycle	30000 pages per month
Page description languages	BR-Script 3, Epson FX, IBM ProPrinter, PCL 6