Brother MFC-7320 Service Manual

1-34
Confidential
■ All black
Step Cause Check Result Remedy
1
Corona wire
failure
Are the electrodes on
the drum unit and
machine body dirty?
Ye s
Clean both electrodes.
(Refer to Fig. 1-1, Fig. 1-2.)
2
Is the corona wire
damaged?
Ye s
Replace the drum unit.
3
Under FG wire
not assembled
correctly
Is the under FG wire
connected securely? No
Re-assemble the under FG
wire.
4
Scanner harness
of the laser unit
connection
failure
Is the scanner harness
of the laser unit
connected securely?
No
Reconnect the scanner
harness of the laser unit.
5
FG harness
ASSY connection
failure
Is the FG harness ASSY
between the laser unit
and main PCB ASSY
connected securely?
No
Reconnect the FG harness
ASSY between the laser
unit and main PCB ASSY
securely.
6
HVPS PCB
failure
Is the problem solved
after replacing the
HVPS PCB ASSY?
Ye s
Replace the HVPS PCB
ASSY.
7
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Ye s
Replace the main PCB
ASSY.
8
Laser unit failure Is the problem solved
after replacing the laser
unit?
Ye s
Replace the laser unit.

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