Brother MFC-8860DN Service Manual

Confidential
9-38
(I-12) Poor fixing
Possible cause
Step
Check
Result
Remedy
Print paper 1 Is thick paper of more than
43lb being used?
Yes Recommend to use the specified
types of paper.
Nip release
lever
2 Does the position of the nip
release levers in the fuser
unit decompress the nip
pressure?
Yes
Return the nip release levers to
the original position.
Toner sensor
failure
(When
printing is
faint.)
3 Is the problem solved by
replacing the drum unit or
the toner cartridge?
Yes 1) Toner is empty.
2) The toner sensor is defective.
Clean the toner sensor.
3) If the wiper in the toner
cartridge is broken, replace the
toner cartridge with a new one.
Fuser unit
thermistor
failure
4 Is the thermistor fitted
correctly?
No Fit the thermistor correctly.
Low-voltage
power supply
PCB failure
5 Is the problem solved by
replacing the low-voltage
power supply PCB?
Yes Replace the low-voltage power
supply PCB.
Open the back cover and fuser cover. Push down the blue tab (1). Repeat this process on the other
side. Make sure that the top of the tab and the white lever (2) are not level with each other. Close
the back cover and try printing again.
1
2
2
1
Fig. 9-2

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