Brother MFC-7320 Service Manual

1-23
Confidential
3. PAPER FEEDING PROBLEMS
Problems related to paper 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.
3.1 No Feeding
3.2 Double Feeding
Step Cause Check Result Remedy
1
Edge actuator
catching in some
position
Does the edge actuator
move smoothly? No
Re-assemble the edge
actuator and ensure
smooth operation.
2
Roller holder
ASSY catching in
some position
Does the roller holder
ASSY move smoothly? Yes
Re-assemble the roller
holder ASSY and ensure
smooth operation.
3
Registration front
sensor failure
Is the problem solved
after replacing the
registration front sensor
PCB ASSY?
Ye s
Replace the registration
front sensor PCB ASSY.
4
Paper feeding kit
failure
Is the surface of the
separation pad or the
pickup roller dirty or worn
out?
Ye s
1) Clean the surface of
the separation pad or
pickup roller.
2) Replace the separation
pad or pickup roller.
5
Pressure plate
gear damage
Is the pressure plate gear
damaged?
Ye s
Replace the paper tray.
6
T1 solenoid failure Does the T1 solenoid
work correctly?
No
Replace the T1 solenoid
7
T1 solenoid Circuit
of the high-voltage
power supply PCB
broken
Is the problem solved
after replacing the high-
voltage power supply
PCB ASSY?
Ye s
Replace the high-voltage
power supply PCB ASSY.
8
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Ye s
Replace the main PCB
ASSY.
9
Main motor failure Is the problem solved
after replacing the drive
sub ASSY?
Ye s
Replace the drive sub
ASSY.
Step Cause Check
Result Remedy
1
Paper feeding kit
is abrasion
Is the surface of the
separation pad worn out?
Ye s
Replace the paper
feeding kit.

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