Brother DCP-B7500D Service Manual

2-73
Confidential
4.2 Troubleshooting for 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.
4.2.1 No paper feeding from paper tray
<User Check>
• Check that the paper is set in the paper tray correctly.
• Check that there is not too much paper set in the paper tray.
• Flip over the paper in the paper tray or rotate the paper 180°.
• Check that the thickness of the paper is 60 to 163 g/m
2
.
• Check that the MP tray is not set as the paper tray.
• Flip through the paper and reset it in the paper tray.
• Clean the paper pick up roller.
Fig. 2-14
Step Cause Remedy
1
Dirt on the paper dust cleaning roller of
the paper tray
Refer to the figure below to clean the paper dust
cleaning roller and inside of the paper dust
cleaning roller cover.
2
T1 roller holder ASSY attachment failure Reattach the T1 roller holder ASSY correctly.
3
Connection failure of the paper feed
motor flat cable
Reconnect the paper feed motor flat cable.
4
Connection failure of the T1 paper feed
sensor harness
(non paper empty sensor models only)
Reconnect the T1 paper feed sensor harness.
5
Connection failure of the T1 clutch harness Reconnect the T1 clutch harness.
6
Connection failure of the T1 paper
empty/paper feed sensor harness
(paper empty sensor models only)
Reconnect the T1 paper empty/paper feed sensor
harness.
7
T1 paper empty actuator coming off Reattach the T1 paper empty actuator.
8
Abrasion of the paper pick up roller Replace the PF kit 1.
9
T1 paper feed sensor failure
(non paper empty sensor models only)
Replace the T1 paper feed sensor PCB ASSY.
10
T1 paper empty sensor failure
(paper empty sensor models only)
Replace the T1 paper empty/paper feed sensor
PCB ASSY.
11
Paper feed motor flat cable failure Replace the paper feed motor flat cable.
12
Paper feed motor failure Replace the paper feed motor.
13
Damaged gears in the paper feed drive
system
Replace the frame L unit.
14
Damaged fuser unit Replace the fuser unit.
15
Main PCB failure Replace the main PCB ASSY.
Paper dust cleaning roller
Paper dust cleaning roller cover
Hooks
<Front side>

Brother DCP-B7500D Specifications

General

Duplex printing	Yes
Print technology	Laser
Maximum resolution	2400 x 600 DPI
Duplex printing mode	Auto
Time to first page (black, normal)	8.5 s
Print speed (black, normal quality, A4/US Letter)	34 ppm
Printing colors	Black
Duplex functions	Print
Maximum duty cycle	15000 pages per month
Number of print cartridges	1
Page description languages	BR-Script 3, PCL 6, PDF 1.7
Copier resize	25 - 400 %
Duplex copying	-
Maximum copy resolution	600 x 600 DPI
Maximum number of copies	99 copies
Scan to	E-mail, File, Image
Input color depth	30 bit
Output color depth	24 bit
Input grayscale depth	10 bit
Output grayscale depth	8 bit
Optical scanning resolution	1200 x 1200 DPI
Faxing	No
Total input capacity	250 sheets
Total output capacity	120 sheets
Paper tray media types	Plain paper, Recycled paper, Thin paper
Paper tray media weight	60 - 230 g/m²
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Legal (media size)
ISO A-series sizes (A0...A9)	A4, A5, A6
Maximum ISO A-series paper size	A4
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Product color	Gray
Market positioning	Home & office
Mac operating systems supported	Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac OS X 10.14 Mojave, Mac OS X 10.15 Catalina, Mac OS X 10.15.3 Catalina, Mac OS X 10.2 Jaguar, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks, Mac OS X 11.0 Big Sur
Windows operating systems supported	Windows 10, Windows 7, Windows 8, Windows 8.1
AC input voltage	220 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (off)	0.03 W
Power consumption (ready)	42 W
Power consumption (sleep)	6.2 W
Power consumption (printing)	485 W

Weight and Dimensions

Depth	398.5 mm
Width	410 mm
Height	272 mm