Brother MFC-8860DN Service Manual

Confidential
9-57
9.2.4.7 Troubleshooting of the control panel
(L-1) Nothing is displayed on the LCD.
User Check
(1) Verify if the power switch is turned off.
Possible cause Step Check Result Remedy
Connection
between main
PCB and control
panel PCB
1 Main PCB and
control panel PCB
are properly
connected
No Fix the connector properly.
Harness between
main PCB and
control panel
PCB
2 Harness is damaged. Yes Replace the harness with a normal
part.
Connection
between main
PCB and low-
voltage power
supply PCB
3 Main PCB and low-
voltage power supply
PCB are properly
connected.
No Fix the connection properly.
Harness between
main PCB and
low-voltage
power supply
PCB LCD
4 Harness is damaged. Yes Replace the harness with a normal
part.
LCD 5 Replacement of LCD
solves the problem.
Yes Replace the LCD with a normal
part.
Control panel
PCB
6 Replacement of
control panel PCB
solves the problem.
Yes Replace the control panel PCB
with a normal part.
Low-voltage
power supply
PCB
7 Replacement of low-
voltage power supply
PCB solves the
problem.
Yes Replace the low-voltage power
supply PCB with a normal part.
Main PCB 8 Replacement of main
PCB solves the
problem.
Yes Replace the main PCB with a
normal part.

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