Brother MFC-9125CN Service Manual

3-62
Confidential
4.2 Pitch Indicated in Roller Image
Image defects which occur periodically may be caused by a failure of the roller. By referring to
the table below, specify the cause based on the pitch indicated in the image of each roller.
4.3 Troubleshooting Image Defect
Image defect related problems are user recoverable if following the User Check items. If the
same problem occurs, follow each procedure in the order of the number described in the Step
column in the tables below.
■ Light on the whole page
No. Parts name The pitch which appears in the image
1 Develop roller 31 mm
2 Exposure drum 94 mm
3 Heat roller in the fuser unit 78 mm
4 Pressure roller in the fuser unit 78 mm
<User Check>
- Check the machine’s environment. High temperature and high humidity
or low temperature and low humidity conditions can cause this problem.
- If the whole page is light, toner save mode may be on. Turn off the toner
save mode.
- Replace the toner cartridge or drum unit with a new one.
- Adjust the color density from the control panel cover ASSY.
- Leave the machine for a while as the power remains ON.
Step Cause Check
Result
Remedy
1 HVPS control PCB
failure
Is the problem solved
after replacing the HVPS
control PCB ASSY?
Yes Replace the HVPS
control PCB ASSY.
2 High-voltage power
supply PCB failure
Is the problem solved
after replacing the
high-voltage power
supply PCB ASSY?
Yes Replace the
high-voltage power
supply PCB ASSY.
3 Engine PCB failure Is the problem solved
after replacing the
engine PCB ASSY?
Yes Replace the engine
PCB ASSY.
4 Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Yes Replace the main PCB
ASSY.
5 LED head control
PCB failure
Is the problem solved
after replacing the LED
head control PCB ASSY?
Yes Replace the LED head
control PCB ASSY.
6 LED ASSY failure
Is the problem solved after
replacing the LED ASSY?
Yes Replace the LED ASSY.
7 Registration mark L
PCB failure
Is the problem solved
after replacing the
registration sensor
holder ASSY?
Yes Replace the
registration sensor
holder ASSY.

Brother MFC-9125CN Specifications

General

DVD/CD printing	No
Print technology	LED
Maximum resolution	2400 x 600 DPI
Economical printing	Yes
Print speed (black, normal quality, A4/US Letter)	19 ppm
Fax compatibility	ITU-T G3
Dimensions (WxDxH)	429.3 x 490.2 x 398.8 mm
All-in-one functions	Copy, Fax, Print, Scan
Connectivity technology	Wired
Color all-in-one functions	copy, fax, print, scan
Printing colors	Black, Cyan, Magenta, Yellow
Maximum duty cycle	25000 pages per month
Number of print cartridges	4
Page description languages	BR-Script 3, PCL 6
Copier resize	25 - 400 %
Maximum copy resolution	- DPI
Maximum number of copies	35 copies
N-in-1 copy function (N=)	2, 4
Copy speed (black, normal quality, A4)	19 cpm
Scan to	CIFS, E-mail, File, FTP, Image, OCR
Scanner type	Flatbed scanner
Input color depth	48 bit
Maximum scan area	A4 / Letter (216 x 297) mm
Image formats supported	BMP, JPG, TIF
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	1200 x 2400 DPI
Fax memory	600 pages
Modem speed	33.6 Kbit/s
Fax coding methods	JBIG, JPEG, MH, MMR (Fax coding method), MR
Fax transmission speed	2 sec/page
Paper input type	Paper tray
Total input capacity	250 sheets
Total output capacity	100 sheets
Total number of input trays	2
Multi-Purpose tray input capacity	1 sheets
Maximum print size	216 x 356 mm
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Recycled paper
Non-ISO print media sizes	Executive
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
Display	LCD
Market positioning	Business
Direct printing	-
Standard interfaces	Ethernet, USB 2.0
USB 2.0 ports quantity	1
Supported network protocols (IPv4)	ARP, RARP, BOOTP, DHCP, APIPA(Auto IP), WINS/NetBIOS name resolution, DNS Resolver, mDNS, LLMNR responder, LPR/LPD, Custom Raw Port/Port9100, IPP/IPPS, FTP Client and ServerTELNET Server, HTTP/HTTPS server, TFTP client and server, SMTP Client, APOP, POP before SMTP, SMTP-AUTH, SNMPv1/v2c/v3, ICMP, LLTD responder, WebServicesPrint, CIFS Client, SNTP, SSL/TLS
Supported network protocols (IPv6)	NDP, RA, DNS resolver, mDNS, LLMNR responder, LPR/LPD, Custom Raw Port/Port9100, IPP/IPPS, FTP Client and Server, TELNET Server, HTTP/HTTPS server, TFTP client and server, SMTP Client, APOP, POP before SMTP, SMTP-AUTH, SNMPv1/v2c/v3, ICMPv6, LLTD responder, WebServicesPrint, CIFS Client, SNTP, SSL/TLS
Maximum internal memory	576 MB
Sound power level (standby)	30 dB
Sound pressure level (copying)	53 dB
AC input voltage	120 V
AC input frequency	50 - 60 Hz
Power consumption (off)	11 W
Power consumption (PowerSave)	75 W
Power consumption (average operating)	480 W
Package weight	28490 g
Operating relative humidity (H-H)	20 - 80 %