Brother MFC-8860DN Service Manual

Confidential
9-29
[ 3 ] Troubleshooting image defect
Several types of the image defects can be cleared by end users. For those defects, instruct the user to
check the ‘User Check’ items described in each table. Even if the same image defect appears, the
following procedures should be followed in the event of specific image defects.
See also [4] “Location of ground contacts” in this Chapter for information about the location of the
grounding contacts.
CAUTION
When using the machine for a special job, such as printing of name cards, print quality cannot be
guaranteed.
(I-1) Light
User Check
(1) Check the machine’s environment. Conditions such as humidity, high
temperatures, etc. may cause this situation to occur.
(2) If the whole page is light, toner save mode may be on. Disable toner save
mode within Printer Properties tab of the driver.
(3) Try installing a new toner cartridge or drum unit.
Possible cause
Step
Check
Result
Remedy
Ground
contacts
Toner sensor
failure
(machine side)
1 Can printing be started
with the drum unit and
toner cartridge removed?
Yes Check if the toner
sensor is dirty and check
the toner sensor
connection.
Toner sensor
failure
(toner
cartridge side)
2 Is the problem solved when
4 or 5 pages are printed
after the toner cartridge is
replaced with a full one?
Yes The wiper of the toner
cartridge is defective.
Replace the toner
cartridge.
Drum
connection
failure
3 Are all the contacts
between the drum unit and
machine body connected
correctly?
No Clean contact electrodes
both on the drum unit
and in the machine
body.
(1), (4)
(5), (6)
HVPS / Main
PCB failure
4 Is the harness connection
between the HVPS and the
main PCB correct?
Yes Replace the HVPS or
the main PCB.
Dirt on the
scanner
window
5 Is there any dirt on the
scanner window?
Yes Wipe it off with a soft
clean paper.
Laser unit
failure
6 Is the problem solved after
replacing the laser unit?
Yes Replace the laser unit.

Brother MFC-8860DN Specifications

General

Duplex printing	Yes
Print technology	Laser
Maximum resolution	1200 x 1200 DPI
Time to first page (black, normal)	8.5 s
Print speed (black, normal quality, A4/US Letter)	28 ppm
Scan to	e-mail, file, image, OCR
Grayscale levels	256
Input color depth	48 bit
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
Maximum number of copies	99 copies
Copy speed (black, normal quality, A4)	28 cpm
Faxing	Mono faxing
Fax memory	500 pages
Modem speed	33.6 Kbit/s
Fax speed dialing (max numbers)	300
Total input capacity	250 sheets
Total output capacity	150 sheets
Auto document feeder (ADF) input capacity	50 sheets
Maximum internal memory	544 MB
Sound power level (standby)	30 dB
Sound pressure level (printing)	55 dB
Display	LCD
Market positioning	Business
Paper tray media types	Envelopes, Plain paper, Recycled paper
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
Font styles	66 Scaleable fonts, Letter, Gothic 16.66, OCR-A, OCR-B, 11 Barcodes
Dimensions (WxDxH)	531 x 450 x 475 mm
Networking features	10/100 Base-TX
All-in-one functions	Copy, Fax, Scan
Color all-in-one functions	scan, n
Compatible operating systems	Windows98(SE)/Me/2000/XP/NT4.0WS Mac OS 9.1-9.2/ OS X 10.2.4 +
Standard interfaces	USB 2.0
Power consumption (standby)	85 W
Power consumption (PowerSave)	15 W
Power consumption (average operating)	1104 W
Sustainability certificates	ENERGY STAR