Brother MFC-8860DN Service Manual

Confidential
9-31
(I-3) Completely blank
Possible cause
Step
Check
Result
Remedy
Ground
contacts
Developing
bias contact
failure
1 Are the developing bias
contacts between the
machine body and drum
unit dirty?
Yes Clean the electrodes at
both sides.
(4)
Yes Clean the shaft and the
electrode.
(1)
Drum unit 2 Are the drum shaft and
drum electrode of the
machine body connected
correctly?
No Check the connection
between the shaft and
the electrode.
(1)
Drum unit
failure
3 Is the problem solved after
replacing the drum unit?
Yes Replace the drum unit.
Toner
cartridge
failure
4 Is the problem solved after
replacing the toner
cartridge?
Yes Replace the toner
cartridge with a new
one.
Scanner
harness
connection
failure
5 Is the scanner harness
connected securely?
(Check if there is any play
in the connection.)
No Reconnect the connector
correctly.
Main PCB
failure
6 Are printing signals being
input to the laser unit?
Is the problem solved after
replacing the main PCB?
Yes Replace the main PCB.
Yes Replace the laser unit. Laser unit
failure
7 Is the scanner interlock
lever damaged?
Is the scanner mirror
broken or loose?
No Replace the high-
voltage power supply
PCB.

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