Brother MFC-7340 Service Manual

iii
Confidential
TABLE OF CONTENTS
REGULATION .........................................................................................................viii
SAFETY INFORMATION ..........................................................................................xii
CHAPTER 1 TROUBLESHOOTING ................................................................... 1-1
1. INTRODUCTION ......................................................................................................................... 1-1
1.1 Precautions ......................................................................................................................... 1-1
1.2 Part names ......................................................................................................................... 1-2
1.3 Initial Check ........................................................................................................................ 1-4
2. ERROR CAUSE .......................................................................................................................... 1-6
2.1 Error indication .................................................................................................................... 1-6
2.2 Error Code Cause and Remedy ......................................................................................... 1-7
2.2.1 Recoverable User Check Errors ............................................................................ 1-7
2.2.2 Service Call Error ................................................................................................... 1-7
3. PAPER FEEDING PROBLEMS ................................................................................................. 1-23
3.1 No Feeding ....................................................................................................................... 1-23
3.2 Double Feeding ................................................................................................................ 1-23
3.3 Paper Jam ........................................................................................................................ 1-24
3.4 Dirt on Paper ..................................................................................................................... 1-25
3.5 Wrinkles or creases .......................................................................................................... 1-25
3.6 Waves in the paper / folds in the paper at the eject roller 2 .............................................. 1-25
3.7 Curl in the paper ............................................................................................................... 1-26
4. TROUBLESHOOTING OF DOCUMENT FEEDING .................................................................. 1-27
4.1 No Feeding ....................................................................................................................... 1-27
4.2 Double feeding ................................................................................................................. 1-27
4.3 Paper Jam ........................................................................................................................ 1-28
5. IMAGE DEFECT TROUBLESHOOTING (Defect Of the Print) .................................................. 1-29
5.1 Image Defect Examples .................................................................................................... 1-29
5.2 Diameter of Rollers ........................................................................................................... 1-29
5.3 Troubleshooting Image Defect .......................................................................................... 1-30
6. TROUBLESHOOTING OF SCANNIG ....................................................................................... 1-43
6.1 Cannot scan the document in the FB unit.
(If scan the document, it is completely white or black.) .................................................... 1-43
6.2 Cannot scan the document in the ADF unit.
(If scan the document, it is completely white or black.) .................................................... 1-43
6.3 Print of the scanning document is light or dark ................................................................. 1-44
6.4 Vertical streaks (White or Black vertical streaks) .............................................................. 1-44
6.5 Poor fixing ......................................................................................................................... 1-44
6.6 Image distortion ................................................................................................................ 1-44

Brother MFC-7340 Specifications

General

Duplex printing	Yes
Print technology	Laser
Maximum resolution	2400 x 600 DPI
Print speed (black, normal quality, A4/US Letter)	24 ppm
Grayscale levels	256
Faxing	Mono faxing
Fax memory	400 pages
Total input capacity	250 sheets
Total output capacity	100 sheets
Auto document feeder (ADF) input capacity	35 sheets
Internal memory	16 MB
Card reader integrated	-
Sound pressure level (printing)	53 dB
Dimensions (WxDxH)	428 x 396 x 304 mm
All-in-one functions	Fax, Scan
Color all-in-one functions	scan, n
Compatible operating systems	Windows Mac OS
Operating temperature (T-T)	10 - 32.5 °C
Operating relative humidity (H-H)	20 - 80 %
Copy speed (black, normal quality, A4)	21 cpm
Power consumption (PowerSave)	10 W
Power consumption (average operating)	460 W
Maximum duty cycle	10000 pages per month
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Transparencies
Non-ISO print media sizes	Executive
ISO A-series sizes (A0...A9)	A4, A5
Maximum ISO A-series paper size	A4
Market positioning	Home & office