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FACSIMILE EQUIPMENT
MODEL:
MFC7750
FAX3750/FAX-8650P
SERVICE MANUAL
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All rights reserved. No part of this publication may be reproduced in any form or by any means without permission in writing from the publisher. Specifications are subject to change without notice. © Copyright Brother 1998
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This publication is a Service Manual covering the specifications, construction, theory of operation, and maintenance of the Brother facsimile equipment. It includes information required for field troubleshooting and repair--disassembly, reassembly, and lubrication--so that service personnel will be able to understand equipment function, to rapidly repair the equipment and order any To perform appropriate maintenance so that the facsimile equipment is always in best condition I . . INSTALLATION
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This printer is certified as a Class 1 laser product under the US Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health Since radiation emitted inside the printer is completely confined within the protective housings and external covers, the laser beam cannot escape from the machine during any phase of user The Center for Device and Radiological Health (CDRH) of the US Food and Drug Administration implemented regulations for l
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I . GENERAL DESCRIPTION CHAPTER
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CONTENTS EQUIPMENT OUTLIN E ................................ ................................ ....................... . I 1 External Appearance and Weight ................................ ................................ . . I 2 s ................................ ................................ ................................ . I SPECIFICATION S ................................ ................................ ............................... . I -2 2. -1 Component 1. -1 1. -1 1.
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1. Weight: Approx. 7.2 kg Machine (incl. drum unit & toner cartridge) Approx. 8.5 kg Components 1 * 2 * I - 1 Provided on the FAX-8650P. Provided on the FAX3750/MFC7750. The equipment consists of the following major components: 1.2 Approx. 12 kg In package Machine proper The figure below shows the equipment appearance and approximate dimensions. External Appearance and Weight 1.1 EQUIPMENT OUTLINE
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2. Model MFC7750 1 - - - RPC 1 [ 2 2 OCR 3 3 3 1 * 2 * ° ° C 2 3 * I - 2 Specifications enclosed in brackets are available if options are used. No handset is provided on the Australian and New Zealand versions. or paper jam.) other way will result in a double feed oading more than 20 pages in any (L - Loading as shown at right. /A4) - Forms type: Xerox 4200 (20 lb/LTR), Xerox 4024 (24 lb/LTR), M.PPC (64 g/m - RH: 50% to 70% C to 30 - Temperature: 20 30 pages under the following conditi
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Model - - - - - - - - - - OCR - 3 1 * 2 * ° ° C 2 3 * I - 3 Specifications enclosed in brackets are available if options are used. No handset is provided on the Australian and New Zealand versions. or paper jam.) other way will result in a double feed (Loading more than 20 pages in any - Loading as shown at right. /A4) - Forms type: Xerox 4200 (20 lb/LTR), Xerox 4024 (24 lb/LTR), M.PPC (64 g/m - RH: 50% to 70% C to 30 - Temperature: 20 30 pages under the following conditions: Option
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Model MFC7750 4 4 OGM 1 [ (PRINTER/FAX, PRINTER/SCAN, PRINTER/COPY) PRINTER/COPY) ] 1 - 1 * 4 * I - 4 Specifications enclosed in brackets are available if options are used. According to the Brother chart in standard mode, MMR. Optional CD-ROM required. Yes No Class 1 No Network Application Visioneer [Visioneer] Viewer Application Brother [Brother] Scanner Application SMSI [SMSI] PC-FAX (Send/Receive) Yes Available with option * Bundled Software Applications No No Data Modem Yes (PRINTER/FAX,
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Model 4 4 OGM ─ ─ ─ ─ 1 * 4 * I - 5 Specifications enclosed in brackets are available if options are used. According to the Brother chart in standard mode, MMR. Optional CD-ROM required. Yes Class 1 No Network Application Viewer Application Scanner Application PC-FAX (Send/Receive) Bundled Software Applications Yes Memory Backup Yes Memory Security Yes Remote Diagnostics No Data Modem No Simultaneous Operation No Memory (Opt Upgrade) 4 MB Memory (Standard) General Yes FAX Retrieval Yes FAX F
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. INSTALLATION II CHAPTER
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CONTENTS INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT .............. . 1 - II 1.
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1. FACSIMILE EQUIPMENT If the program version is updated or the main PCB is replaced, install the update program onto the flash ROM of the main PCB. Pentium 75 or higher - RAM ® - OS ® ® Connecting the equipment to your computer Connect the interface cable to the parallel interface port on the back of the equipment and Connect the other end of the interface cable to the printer port of your c omputer and secure Host computer II - 1 wires Lock Interface cable Plug the equipment's power cord into
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Installing the update data onto the flash ROM of the facsimile equipment Load the floppy disk which stores the data and transfer utility into the floppy disk drive of your computer. me directory of the hard disk.) Click the Start button, point to Programs, and then click MS-DOS Prompt to open an MS- Type the drive letter where the update data and transfer utility are located. If it is a floppy disk drive, type from the command line and press the ENTER key. Check that your computer is connecte
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. THEORY OF OPERATION III CHAPTER
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CONTENTS W ................................ ................................ ................................ .......... . 1 - S ................................ ................................ ................................ ..... . m ................................ ................................ .................... . III 2.1.1 Document feeding and ejecting mechanis m ................................ ......... . III r ................................ ................................ .
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1. I II - 1 *Not provided on the FAX-8650P. OVERVIEW
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2. MECHANISMS The facsimile equipment is classified into the following mechanisms: n - ejecting mechanism - n - Paper pulling-in, registration, feeding, and ejecting - - Heat-fixing mechanism n ejecting mechanism Document scanning mechanism Paper ejecting mechanism Paper pulling-in and mechanism With paper feeding registration mechanism Print process mechanism mechanism I II - 2 LASER PRINTING MECHANISM Heat-fixing MECHANISM SCANNER Document feeding and SENSORS AND ACTUATORS processes) exposing,
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Document feeding and ejecting mechanism This mechanism consists of the document stacker, automatic document feeder (ADF), document If the operator sets documents on the document stacker and starts the scanning operation, the scanner motor rotates so that the ADF (which consists of the separation roller and ADF parts) feeds those documents into the equipment, starting from the bottom sheet to the top, page by page. Each document advances with the document feed roller ASSY to the scanner, and the
