Brother MFC-8860DN Servise Manual

Confidential
9-23
(5) Insufficient output from high-voltage power supply unit
Possible cause
Step
Check
Result
Remedy
High-voltage
contact
1 Do any of the terminals on
the high-voltage contacts
have dirt or contact burns?
Yes Clean the terminals.
Yes Replace the high-voltage power
supply PCB.
High-voltage
power supply
PCB
2 Check the connections of
the connector between the
high-voltage power supply
and the main PCB are
secured correctly?
No Reconnect the connector
between the high-voltage power
supply and the main PCB.
(6) Fixing heater temperature 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.
Blown
thermostat
3 Remove the fuser unit and
measure the resistance of
the thermostat. Is it open
circuit?
Yes Replace the fuser unit.
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 fuser unit.
(7) Laser Unit failure
Possible cause
Step
Check
Result
Remedy
No Reconnect the connector
securely.
Harness
connection
failure (1)
1 Is connector CN18 on the
main PCB secured
correctly?
Yes Replace the laser unit.
No Reconnect the connector
securely.
Harness
connection
failure (2)
2 Is the connection of the
scanner motor connector
CN10 on the main PCB
secure?
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