Brother MFC-8860DN Servise Manual

Confidential
9-24
(8) Fuser unit failure
Possible cause
Step
Check
Result
Remedy
1 Is the contact of connector
CN1 and CN2 on the relay
rear PCB good?
No Reconnect the connector.
Poor
thermistor
harness
contact
2 Is the contact of connector
CN3 on the main PCB
good?
No Reconnect the connector.
Yes Replace the fuser unit. Thermistor
assembling
failure
3 Is the thermistor installed
properly?
No Reinstall the thermistor
properly.
Halogen
heater lamp
failure
4 Remove the fuser unit and
measure the resistance of
the halogen heater lamp. Is
it open circuit?
Yes Replace the halogen heater
lamp.
Heater harness
connection
failure
5 Is the heater harness
connector connected to the
low-voltage power supply
PCB and fuser unit secure?
No Reconnect the connectors
securely.
NOTE:
• This problem will be cleared if leaving the machine power ON for ten minutes.
• If the heater is cooled down sufficiently, this problem may be cleared by turning on the machine
power switch while pressing the Go button. Be warned, however, that this operation will melt
the fuser unit if the heater is hot.
(9) Main PCB failure
Possible cause
Step
Check
Result
Remedy
Main PCB 1 Is it possible to print the
test page with the method
of 8.4.5 ‘Test Pattern 1’ in
chapter 8?
No Replace the main PCB.
Software bug 2 Does this problem appear
when printing specific data
or printing under a specific
environment?
Yes Inform the Brother office of the
used specific data, machine
condition and system
environment.

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