Brother MFC-7860DW Service Manual

iii
Confidential
3.13.4 Low voltage power supply PCB ASSY failure .................................................... 2-103
3.13.5 NCU ASSY failure .............................................................................................. 2-103
3.14 Other Problems ............................................................................................................... 2-104
3.14.1 The machine is not turned ON, or the LCD indication does not appear ............. 2-104
3.14.2 Fuser fan does not rotate ................................................................................... 2-104
3.14.3 The room temperature is high or low .................................................................. 2-104
3.14.4 Problem associated with Secure Function Lock ................................................ 2-104
CHAPTER 3 DISASSEMBLY/REASSEMBLY
1. SAFETY PRECAUTIONS ........................................................................................................ 3-1
2. PACKING ................................................................................................................................. 3-2
3. SCREW CATALOGUE ............................................................................................................. 3-3
4. SCREW TORQUE LIST ........................................................................................................... 3-4
5. LUBRICATION ......................................................................................................................... 3-6
6. OVERVIEW OF GEARS ........................................................................................................... 3-7
7. HARNESS ROUTING ............................................................................................................. 3-10
8. DISASSEMBLY FLOW CHART ............................................................................................. 3-26
9. DISASSEMBLY PROCEDURE .............................................................................................. 3-27
9.1 Paper Tray ........................................................................................................................ 3-29
9.2 Cord Hook ......................................................................................................................... 3-32
9.3 Back Cover ....................................................................................................................... 3-33
9.4 Outer Chute ASSY ............................................................................................................ 3-34
9.5 Fuser Cover ...................................................................................................................... 3-35
9.6 Inner Chute ASSY, Eject Pinch Roller R ASSY and Eject Pinch Roller L ASSY .............. 3-36
9.7 Front Cover ASSY, Support Flap 1 ................................................................................... 3-38
9.8 Side cover L / Handset holder ASSY ................................................................................ 3-40
9.9 Side Cover R .................................................................................................................... 3-43
9.10 ADF Unit (For models with ADF) ...................................................................................... 3-44
9.10.1 ADF Unit ............................................................................................................... 3-44
9.10.2 Hinge ASSY L / Hinge Arm R / Hinge R / Hinge R support .................................. 3-46
9.10.3 Document Stopper ............................................................................................... 3-47
9.10.4 Document Sub Tray ............................................................................................. 3-48
9.10.5 ADF Cover ASSY ................................................................................................. 3-49
9.10.6 Gear Cover ........................................................................................................... 3-50
9.10.7 Separation Roller ASSY ....................................................................................... 3-51
9.10.8 Separation Rubber Holder ASSY ......................................................................... 3-52
9.10.9 Upper Document Chute ASSY SX ....................................................................... 3-53
9.10.10Document Feed Roller ASSY ............................................................................... 3-54
9.10.11Lower Document Chute ASSY ............................................................................. 3-55
9.10.12Ejection Roller ASSY ............................................................................................ 3-56
9.10.13ADF motor ............................................................................................................ 3-57

Brother MFC-7860DW Specifications

General

Secure printing	Yes
Print technology	Laser
Maximum resolution	2400 x 600 DPI
Time to first page (black, normal)	9 s
Print speed (black, normal quality, A4/US Letter)	26 ppm
Duplex print speed (black, normal quality, A4/US Letter)	5 ppm
Scan to	E-mail, E-mail Server, File, FTP, Image, OCR
Scanner type	Flatbed & ADF scanner
Grayscale levels	256
Input color depth	48 bit
Output color depth	24 bit
Image formats supported	BMP, JPG, TIF
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	600 x 2400 DPI
Copier resize	25 - 400 %
Maximum copy resolution	600 x 600 DPI
Maximum number of copies	99 copies
N-in-1 copy function (N=)	2, 4
Time to first copy (black, normal)	11 s
Copy speed (black, normal quality, A4)	26 cpm
Faxing	Mono faxing
Fax memory	500 pages
Modem speed	33.6 Kbit/s
Fax coding methods	JBIG, MH, MMR (Fax coding method), MR
Fax speed dialing (max numbers)	200
Total input capacity	250 sheets
Total output capacity	100 sheets
Auto document feeder (ADF) input capacity	35 sheets
Display	LCD
Market positioning	Home & office
Display number of lines	2 lines
Display number of characters	16
Internal memory	32 MB
Processor family	ARM
Processor frequency	200 MHz
Card reader integrated	No
Sound pressure level (copying)	53 dB
Sound pressure level (printing)	30 dB
Custom media width	76.2 - 216 mm
Maximum print size	216 x 406 mm
Custom media length	116 - 406.4 mm
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Recycled paper
Paper tray media weight	60 - 105 g/m²
Non-ISO print media sizes	Letter
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 163 g/m²
Auto Document Feeder (ADF) media weight	64 - 90 g/m²
Security algorithms	128-bit WEP, 64-bit WEP, WPA-AES, WPA-PSK, WPA-TKIP, WPA2-PSK
Dimensions (WxDxH)	527 x 510 x 493 mm
All-in-one functions	Copy, Fax, Print, Scan
Color all-in-one functions	Scan
Standard interfaces	USB 2.0
USB 2.0 ports quantity	1
AC input frequency	50 - 60 Hz
Power consumption (standby)	55 W
Power consumption (PowerSave)	0.9 W
Power consumption (average operating)	445 W
Sustainability certificates	ENERGY STAR
Maximum duty cycle	- pages per month
Package weight	11600 g

Weight and Dimensions

Weight	14800 g