Brother MFC-7320 Service Manual

1-27
Confidential
4. TROUBLESHOOTING OF DOCUMENT FEEDING
Problems related to document feeding are end user recoverable if following the User Check
items. If the same problem occurs again, follow each procedure in the order of the number
described in the step column in the tables below.
4.1 No Feeding
4.2 Double feeding
User Check
• Check if the document is inserted correctly to the depths of the ADF unit. (If the
document is inserted, the LCD indication is changed.)
Step Cause Check
Result Remedy
1
Document front
actuator not
operating
smoothly or
catching
Does document front
actuator move
smoothly? No
Re-assemble document
front actuator.
2
Foreign object
around paper
feed roller
Is there a foreign object
around the paper feed
roller?
Ye s
Remove the foreign object.
3
Paper feed roller
failure
Is the surface of the
paper feed roller worn
out?
Ye s
Replace the separate roller
shaft ASSY.
4
ADF sensor PCB Is the problem solved by
replacing the ADF
sensor PCB?
Ye s
Replace the ADF sensor
PCB.
5
ADF motor
failure
Is the problem solved by
replacing the ADF
motor?
Ye s
Replace the ADF motor.
6
Drive frame
ASSY failure
Is the problem solved by
replacing the drive
frame ASSY?
Ye s
Replace the drive frame
ASSY.
7
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Ye s
Replace the main PCB
ASSY.
Step Cause Check
Result Remedy
1
Separation
rubber failure
Is the surface of the
separation rubber worn
out?
Ye s
Replace the separation
rubber.

Brother MFC-7320 Specifications

General

Print technology	Laser
Maximum resolution	2400 x 600 DPI
Time to first page (black, normal)	10 s
Print speed (black, normal quality, A4/US Letter)	18 ppm
Copier resize	25 - 400 %
PC free copying	Yes
Maximum copy resolution	600 x 600 DPI
Copy speed (black, normal quality, A4)	11 cpm
Faxing	Mono faxing
Fax memory	400 pages
Fax speed dialing (max numbers)	200
Total input capacity	250 sheets
Total output capacity	100 sheets
Multi-Purpose tray input capacity	1 sheets
Auto document feeder (ADF) input capacity	35 sheets
Sound power level (standby)	32 dB
Sound pressure level (printing)	53 dB
Standard interfaces	USB 2.0
Dimensions (WxDxH)	428 x 396 x 304 mm
All-in-one functions	Copy, Fax, Scan
Color all-in-one functions	scan, n
Compatible operating systems	Windows Vista, XP (32 & 64 bit); Windows 2000, Mac OS X 10.2.4 en recenter Linux printer driver
Power consumption (standby)	75 W
Power consumption (PowerSave)	9 W
Power consumption (average operating)	320 W
Display	LCD
Market positioning	Home & office
Media weight (tray 1)	60 - 105 g/m²
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
Bundled software	ScanSoft Paperport 11 SE+OCR, Newsoft Presto!, PageManager7 (Mac)
Package weight	14.900 g
Grayscale levels	256
Input color depth	24 bit
Sustainability certificates	ENERGY STAR