Brother MFC-7365DN Service Manual

2-86
Confidential
■ Black horizontal stripes
Fig. 2-13
User Check
• Clean the inside of the machine and the corona wire in the drum unit.
• When the horizontal stripes at 94.2 mm are intervals, replace the
drum unit with a new one.
• The paper tray ground terminal provided in the machine body may
be dirty. Clean the contact with a dry cloth.
• Toner attached on the develop roller (horizontal stripes at 32.5 mm)
This problem will disappear by printing approximate 10 pages.
If the same problem occurs, replace the toner cartridge.
Step Cause Remedy
1
Dirt on the electrodes of the drum
unit and the machine body
Clean the electrodes of the drum unit and
machine body. (Refer to Fig. 2-11, Fig. 2-
12.)
2
Bend of tray ground spring (1)
Correct bending of the tray ground spring .
(2) Replace the paper tray.
3
Scratch and Dirt on the heat roller
(horizontal stripes at 53.4 mm)
Replace the fuser unit.
4
High voltage power supply PCB
ASSY failure
Replace the high voltage power supply
PCB ASSY.
5 Main PCB failure Replace the main PCB ASSY.
CAUTION :
• Image defects which appear periodically may be caused by failure of a roller. Specify
the cause referring to the diameter of the rollers or pitch which appears in the image as
shown in the table below
No. Parts name
Diameter
The pitch which
appears in the image
1 Develop roller
Ø16 mm 32.5 mm
2 Exposure drum
Ø30 mm 94.2 mm
3 Heat roller in the fuser unit
Ø17 mm 53.4 mm
4 Pressure roller ASSY in the fuser unit
Ø25 mm 78.5 mm
Bottom surface of Paper tray
Paper tray ground terminal

Brother MFC-7365DN Specifications

Printing Specifications

print technology	Electrophotographic Laser
print speed	Up to 24ppm
print resolution	Up to 1200 x 600 dpi

Copying Specifications

copy speed	Up to 24cpm
copy resolution	600 x 600 dpi
copy reduction/enlargement	25% - 400% in 1% increments

Scanning Specifications

scanner type	Color Flatbed with ADF
document glass size	8.5” x 11” (letter)
scan resolution	Optical: Up to 600 x 2400 dpi

Paper Handling

paper size maximum	Up to 8.5” x 14” (legal size)
paper input capacity maximum	250-sheet capacity paper tray, single-sheet manual feed slot
output capacity maximum	100 sheets (face down), 1 sheet (face up)

Weight and Dimensions

unit dimensions	15.9” W x 15.7” D x 12.4” H
unit weight	25.6 lbs.
carton weight	32.6 lbs.
carton dimensions	20.7” W x 20.1” D x 19.4” H