Brother FAX-750 Service Manual
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Brother FAX-750 Service Manual

Facsimile equipment
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See also: Owner's Manual
FACSIMILE EQUIPMENT
SERVICE MANUAL
MODEL: FAX750/FAX770/FAX870MC
FAX-910/FAX-920/FAX-921/FAX-930/FAX-931
MFC-925/MFC970MC

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  • Page 1 FACSIMILE EQUIPMENT SERVICE MANUAL MODEL: FAX750/FAX770/FAX870MC FAX-910/FAX-920/FAX-921/FAX-930/FAX-931 MFC-925/MFC970MC...
  • Page 2 © Copyright Brother 1998 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.
  • Page 3 PREFACE 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 necessary spare parts.
  • Page 4 CHAPTER I. GENERAL DESCRIPTION...
  • Page 5 CONTENTS EQUIPMENT OUTLINE .................... I-1 1.1 External Appearance and Weight ..............I-1 1.2 Components...................... I-1 SPECIFICATIONS..................... I-2...

  • Page 6: Equipment Outline

    EQUIPMENT OUTLINE External Appearance and Weight The figure below shows the equipment appearance and approximate dimensions. Weight: Machine proper (excluding a ribbon cartridge) Approx. 4 kg (8.82 lbs.) In package Approx. 6 kg (13.23 lbs.) Components The equipment consists of the following major components: I - 1...

  • Page 7: Specifications

    SPECIFICATIONS Model Name FAX750 FAX770 Engine Thermal transfer Thermal transfer Color Black (1395) White (1397) Transmission Speed (sec) Modem Speed (bps) 9600 9600 Group Compatibility Input/Output Width 8.5"/8.5" 8.5"/8.5" ADF (pages) Recording Paper Loadable 100 sheets 100 sheets Ribbon Life (Letter-size print) 250 pages (77 m) 250 pages (77 m) Starter Ribbon Life (Letter-size print)
  • Page 8 Model Name FAX870MC MFC970MC Engine Thermal transfer Thermal transfer Color White (1397) White (1138) Transmission Speed (sec) Modem Speed (bps) 14,400 14,400 Group Compatibility Input/Output Width 8.5"/8.5" 8.5"/8.5" ADF (pages) Recording Paper Loadable 100 sheets 100 sheets Ribbon Life (Letter-size print) 250 pages (77 m) 250 pages (77 m) Starter Ribbon Life (Letter-size print)
  • Page 9 Model Name FAX-910 FAX-920/921 Engine Thermal Transfer Thermal Transfer Color Black(1395) Black(1395)/White(1397/1138) Transmission Speed (sec) Modem Speed (bps) 9600 9600 Group Compatibility Input/Output Width 8.5"/8.5" 8.5"/8.5" ADF (pages) Recording Paper Loadable 100 sheets 100 sheets Ribbon Life (A4-size print) 235 pages 235 pages Starter Ribbon Life (A4-size print) 90 pages (30 m)
  • Page 10 Model Name FAX-930/931 MFC-925 Engine Thermal Transfer Thermal Transfer Color Black(1395)/White(1397/1138) White(1138) Transmission Speed (sec) Modem Speed (bps) 14,400 9600 Group Compatibility Input/Output Width 8.5"/8.5" 8.5"/8.5" ADF (pages) Recording Paper Loadable 100 sheets 100 sheets Ribbon Life (A4-size print) 235 pages 235 pages Starter Ribbon Life (A4-size print) 90 pages (30 m)
  • Page 11 CHAPTER II. INSTALLATION...
  • Page 12 CHAPTER III. THEORY OF OPERATION...

  • Page 13: Table Of Contents

    CONTENTS OVERVIEW ....................... III-1 MECHANISMS ......................III-2 2.1 Transmitting Mechanism (Feeding and scanning documents) ......III-2 2.1.1 Automatic document feeder (ADF) ............III-2 2.1.2 Scanner ..................... III-3 2.2 Receiving Mechanism (Feeding paper and printing data)......... III-4 2.3 Power Transmission Mechanism ..............III-5 2.3.1 Structure of the gear train .................

  • Page 14: Overview

    OVERVIEW Not provided on the FAX-910. III - 1...

  • Page 15: Mechanisms

    MECHANISMS The facsimile equipment is classified into the following mechanisms: n Transmitting Mechanism Feeding and scanning documents n Receiving Mechanism Feeding paper and printing data n Power Transmission Mechanism Switching the power transmission route n Sensors and Actuators Transmitting Mechanism (Feeding and scanning documents) The transmitting mechanism consists of the document stacker, automatic document feeder (ADF), document feeding related rollers, scanner, and document sensors.

  • Page 16: Scanner

    2.1.2 Scanner The scanner uses a contact image sensor (CIS) unit which consists of an LED array illuminating documents, a self-focus lens array collecting the reflected light, a CIS PCB carrying out photoelectric conversion to output picture element data, and a cover glass on which a document advances.

  • Page 17: Receiving Mechanism (Feeding Paper And Printing Data)

    Receiving Mechanism (Feeding paper and printing data) The receiving mechanism consists of the recording paper cover ASSY, paper feed roller ASSY, platen, thermal recording head, paper ejection roller, and sensors. (For details about the sensors, refer to Section 2.4.) STEP 1: In the paper feeding mode If the equipment receives data, the control electronics activates the solenoid and rotates the motor counterclockwise to drive the paper feed roller (and paper ejection roller).

  • Page 18: Power Transmission Mechanism

    Power Transmission Mechanism The equipment has a single drive motor whose power transmission route can be switched by the planetary gear systems and the solenoid. This switching allows the equipment to function in four operation modes (scanning, paper feeding/ejecting, recording, and copying modes). For the details about the planetary gear systems, refer to Subsection 2.3.2.

  • Page 19: Description Of Planetary Gear System

    2.3.2 Description of planetary gear system The equipment uses the following three planetary gear systems: - Sun gear 24/90 ("B" in the figure given on the previous page) and its planet gears - Sun gear 65/60 ("K") and its planet gear - Sun gear 24/28 ("O") and its planet gear This section describes the planetary gear system of sun gear 24/90 ("B").

  • Page 20: Power Transmission For Four Operation Modes

    2.3.3 Power transmission for four operation modes Depending upon the solenoid ON/OFF state and the motor rotation direction, the planetary gear train switches the power transmission route for the four operation modes. Solenoid ON/OFF state Motor rotation direction III - 7...
  • Page 21 [ 1 ] Scanning mode (Solenoid: OFF, Motor rotation: Reverse) In the scanning mode, the control electronics deactivates the solenoid. When the motor rotates in the reverse direction, the clutch lever turns counterclockwise with the compression spring so that its cutout becomes engaged with the stopper of arm A.
  • Page 22 [ 2 ] Paper feeding/ejecting mode (Solenoid: ON, Motor rotation: Reverse) In the paper feeding/ejecting mode, the control electronics activates the solenoid to release the stopper of arm A. When the motor rotates in the reverse direction, sun gear 24/90 ("B") rotates clockwise so that planet gear 34A ("J") transmits the torque via sun gear 65/60 ("K") and other gears to the paper feed roller gear ("T") and paper ejection roller gear ("R").
  • Page 23 [ 3 ] Recording mode (Solenoid: OFF, Motor rotation: Forward) In the recording mode, the control electronics deactivates the solenoid. When the motor rotates in the forward direction, the clutch lever turns counterclockwise with the compression spring so that its cutout becomes engaged with the stopper of arm A.
  • Page 24 Active Gears on the Inner Side of the Drive Unit III - 11...
  • Page 25 [ 4 ] Copying mode (Solenoid: ON, Motor rotation: Forward) In the copying mode, the control electronics activates the solenoid to release the stopper of arm A from the clutch lever. When the motor rotates in the forward direction, sun gear 24/90 ("B") rotates counterclockwise so that planet gear 34A ("J") transmits the torque to the document scanner mechanism (e.g., the separation roller gear ("G"), LF roller gear ("I") and document ejection roller gear ("H")) and planet gear 34B ("C") transmits the torque to the recording mechanism (e.g., platen...
  • Page 26 Active Gears on the Inner Side of the Drive Unit III - 13...

  • Page 27: Power Transmission Route

    2.3.4 Power transmission route Rotation of the motor gear is transmitted as shown below. Gears on the outer side of the drive unit and on the left sides of the platen frame, main frame and control panel ASSY Gears on the inner side of the drive unit A: Motor gear O: Sun gear 24/28 B: Sun gear 24/90...
  • Page 28 [ 1 ] Scanning Mode (Solenoid: OFF, Motor rotation: reverse) [ 2 ] Paper Feeding/Ejecting Mode (Solenoid: ON, Motor rotation: reverse) [ 3 ] Recording Mode (Solenoid: OFF, Motor rotation: forward) [ 4 ] Copying Mode (Solenoid: ON, Motor rotation: forward) III - 15...

  • Page 29: Sensors And Actuators

    Sensors and Actuators This equipment has five photosensors and two mechanical switches as described below. Sensor name Type Located on Document front sensor Photosensor Control panel PCB ASSY Document rear sensor Photosensor (PI2) Main PCB Paper-edge sensor Photosensor (PH1) Sensor PCB Paper ejection sensor Photosensor (PH2) Sensor PCB...
  • Page 30 Location of Sensors and Actuators (1) III - 17...
  • Page 31 Not provided on the FAX-910. Location of Sensors and Actuators (2) III - 18...

  • Page 32: Control Electronics

    3. CONTROL ELECTRONICS Configuration The hardware configuration of the facsimile equipment is shown below. *1 On the main PCB are these sensors: Ribbon sensor (PI1) Document rear sensor (PI2) Cover sensor (SW1) *2 On the front document sensor PCB is the front document sensor.

  • Page 33: Main Pcb

    Main PCB The main PCB, which is the nucleus controlling the entire operation of the equipment, consists of a FAX engine (ASIC), memories, motor drive circuitry, sensor detection circuitry, and analog circuits for scanning, recording, and power transmission shifting. *Provided on the FAX870MC/FAX-930/FAX-931/MFC970MC. EEPROM: Electrically Erasable Programmable Read-only Memory DRAM: Dynamic Random Access Memory...
  • Page 34 FAX750/FAX770/FAX-910/FAX-920/FAX-921/MFC-925 FAX870MC/FAX-930/FAX-931/MFC970MC III - 21...

  • Page 35: Ncu Pcb

    NCU PCB The NCU PCB switches the communications line to telephone or built-in MODEM, under the control of the main PCB. U.S.A. versions III - 22...
  • Page 36 European versions NOTE: For models equipped with a power failure phone, the circuit enclosed in a dotted line does not apply and points A and B are short circuited together. III - 23...

  • Page 37: Control Panel Pcb

    Control Panel PCB The control panel PCB and the main PCB communicate with each other by serially transmitting commands and data. The control panel unit consists of a gate array, an LCD and LEDs, which are controlled by the gate array according to commands issued from the FAX engine on the main PCB.

  • Page 38: Power Supply Pcb

    Power Supply PCB The power supply uses the switching regulator to generate DC power (+25V, +6.5V, and +5V) from a commercial AC power line. The +25V source is stabilized and fed to the motor and solenoid (for feeding documents, recording paper, and ink ribbon), recording head, the main PCB, and the CIS LED array.
  • Page 39 CHAPTER IV. DISASSEMBLY/REASSEMBLY, LUBRICATION AND ADJUSTMENT...
  • Page 40 CONTENTS DISASSEMBLY/REASSEMBLY ................IV-1 Safety Precautions ....................IV-1 Tightening Torque List .................... IV-2 Preparation......................IV-3 How to Access the Object Component ..............IV-3 Disassembly Order Flow ..................IV-4 ROM Cover, Battery ASSY* and Ribbon Shaft Stopper ........IV-5 Control Panel ASSY.................... IV-7 Panel Rear Cover and Control Panel ..............

  • Page 41: Disassembly/Reassembly

    DISASSEMBLY/REASSEMBLY n n Safety Precautions To prevent the creation of secondary problems by mishandling, observe the following precautions during maintenance work. (1) Unplug the power cord from the power outlet before replacing parts or units. When having access to the power supply, be sure to unplug the power cord from the power outlet. (2) Be careful not to lose screws, washers, or other parts removed for parts replacement.

  • Page 42: Tightening Torque List

    Tightening Torque List Location Screw type Q'ty Tightening torque Loosening torque (kg•cm) (kg•cm) ADF parts Taptite, pan (washer) B M3x6 4 ±2 Min. 1 Panel rear cover Taptite, cup B M3x8 4 ±2 Min. 1.5 Document front sensor PCB Taptite, cup B M2.6x6 4 ±2 Min.

  • Page 43: Preparation

    Preparation Prior to proceeding to the disassembly procedure, (1) Unplug - the modular jack of the telephone line, - the modular jack of the curled cord (and remove the handset), and - the modular jack of an external telephone set if connected. (Not shown below.) (2) Remove - the document wire extension, - the paper wire extension,...

  • Page 44: Disassembly Order Flow

    Disassembly Order Flow IV - 4...

  • Page 45: Rom Cover, Battery Assy* And Ribbon Shaft Stopper

    ROM Cover, Battery ASSY* and Ribbon Shaft Stopper (*FAX870MC/FAX-930/FAX-931/MFC970MC) (1) Open the control panel ASSY to the front. (2) Pull up the lock levers and open the recording paper cover ASSY to the rear. (3) As shown below, insert the tip of the spring hook at the center or right half of the locking arm (when viewed from the front), then lift up the hook to release and move the ROM cover to the right.
  • Page 46 (5) Remove the ribbon shaft stopper by pushing down the rear end of the stopper lightly with a screwdriver. Reassembling Notes • When reinstalling the ribbon shaft stopper, lightly push down the ribbon shaft stopper spring with the rear end of the ribbon shaft stopper and then set the stopper. IV - 6...

  • Page 47: Control Panel Assy

    Control Panel ASSY (1) Open the control panel ASSY to the front. (2) Push the right arm of the panel rear cover outward (in the direction of arrow •) to release it from the boss provided on the main frame, then move the control panel ASSY to the left and push the left arm outward (in the direction of arrow ‚).
  • Page 48 (4) Disconnect the panel-main harness. IV - 8...

  • Page 49: Panel Rear Cover And Control Panel

    Panel Rear Cover and Control Panel (1) Place the control panel ASSY upside down. If you do not need to remove the ADF parts, document pressure bar, or document ejection roller, skip to step (6). (2) To remove the ADF parts (spring covers, spring plates, and separation rubber), remove the screw.
  • Page 50 (4) To disassemble the document pressure bar ASSY, first remove the white film. NOTE: Once removed, the white film will become unusable and a new one will have to be put back in. Next, place the document pressure bar ASSY with the pressure bar support facing up for easier disassembly.
  • Page 51 (5) To remove the document ejection roller, push the arm rib to the rear and shift the document ejection roller to the right. Pull out the document ejection roller gear and remove gear 37. Pull out the document ejection roller to the left. Remove the bearing.
  • Page 52 IV - 12...
  • Page 53 (11) To remove the LCD, unhook the four "Z" latches of the LCD holder from the control panel PCB. Unlock the LCD cable connector and disconnect the LCD flat cable. Slide the LCD to the cable side and remove it from the LCD holder. NOTE: Do not take out the LCD except when the LCD is defective and requires replacement.

  • Page 54: Lf Roller Assy And Cis Unit

    LF Roller ASSY and CIS Unit (1) Take off the LF leaf spring by removing the screw. (2) Push the arm rib to the rear and shift the LF roller ASSY to the left. The bearing also comes off. IV - 14...
  • Page 55 (3) Peel off the black CIS film. NOTE: Once removed, the CIS film will become unusable and a new one will have to be put back in. IV - 15...
  • Page 56 (4) Remove screw "a" from the CIS holder L. (5) Lift up the left end of the CIS unit slightly and disengage the CIS holder R from the hooks provided of the main frame. (6) Disconnect the CIS-main harness. (7) Take off the CIS holders L and R by removing screws "b." IV - 16...
  • Page 57 (8) Push the latch to the rear and remove the document pressure rollers and their shaft. (9) Remove the document pressure roller spring. Reassembling Notes • When attaching the CIS film, align its right and rear edges with the cutout provided in the main frame, as illustrated on page IV-15.

  • Page 58: Head Protector, Recording Head Assy, Head Adjuster, And Recorder Frame

    Head Protector, Recording Head ASSY, Head Adjuster, and Recorder Frame (1) Pull up the lock levers and open the recording paper cover ASSY to the rear. (2) While pulling up the left end of the head protector, unhook latches • through „ in this order with a small flat screwdriver as illustrated below.
  • Page 59 (3) Push down both ends of the recording head ASSY and move it to the rear to release the tabs from the cutouts provided in the recorder frame. (4) Disconnect the two harnesses (main-head harness and head-power harness) from the recording head ASSY and then lift up the ASSY.
  • Page 60 (6) Take off the recorder frame by removing the two screws. (7) Remove the grounding spring. (8) Take out the head-power harness from the hook provided on the main frame. IV - 20...
  • Page 61 (9) To replace the main frame with a new one, first check to see which position the head adjuster is currently set in (see the three positions in the illustration below), and then remove the head adjuster with a flat screwdriver. Next set it to the new main frame in the same position. If the printed image is abnormally light or dark, remove the head adjuster and set it back in any other position.

  • Page 62: Recording Paper Cover Assy And Paper Guides

    Recording Paper Cover ASSY and Paper Guides* Not provided on the U.S.A. and Canadian versions.) (1) To remove the paper guides*, open the paper front cover towards you, then pull up the latch (in • the direction of arrow in the illustration below) and pull the paper guide in the direction of ‚...

  • Page 63: Lock Levers, Chute B Assy, Gears, Paper Ejection Roller, Paper Feed Roller Assy, Pressure Plate, Paper Feed Chute And Other Components On The Platen Frame

    Lock Levers, Chute B ASSY, Gears, Paper Ejection Roller, Paper Feed Roller ASSY, Pressure Plate, Paper Feed Chute and Other Components on the Platen Frame With the platen frame being secured to the main frame, you can remove and install the components given in this section.
  • Page 64 (3) Pull the chute B ASSY up and towards you to unhook the upper latches from the platen frame, then pull the ASSY down and towards you to unhook the lower latches. IV - 24...
  • Page 65 (4) At the left end of the platen frame, remove the gears in the following order: Platen gear (gear 25/27) by pulling its pawl outwards. (Also remove the black platen shaft bushing L.) Arm P ASSY by pulling its pawl outwards. Gear 24/28 (sun gear) Clutch gear 37 ASSY by removing the retaining ring, together with gear 19/38 Paper ejection roller gear...
  • Page 66 (6) Remove the front cover sensing actuator from the paper feed roller shaft by pulling up the actuator's rear edge as shown below. (7) At the right end of the paper feed roller ASSY (when viewed from the rear), remove the collar stopper and gear 43 ASSY by removing the retaining ring.
  • Page 67 (9) Make sure that the platen is set in place, and then close the platen frame ASSY. NOTE: If you close the platen frame ASSY when no platen is set and the recording head ASSY is installed, the platen frame ASSY and the recording head ASSY will be locked together.
  • Page 68 (12) Pull up the separation pad while squeezing it. The spring also comes off. (13) Remove the paper-edge sensor actuator by pulling the support outwards. IV - 28...
  • Page 69 (14) To take the paper feed chute off the platen frame, do the following: - Disconnect the main-sensor harness from the sensor PCB while pressing down the PCB with your finger, then remove the harness guide and take out the harness from the cable clamps.
  • Page 70 - Remove the two screws and lift up the paper feed chute. IV - 30...
  • Page 71 (15) From the paper feed chute, remove the pressure plate link, paper ejection sensor actuator, sensor PCB, and chute film. NOTE: Once removed, the chute film will become unusable and a new one will have to be put back in. IV - 31...
  • Page 72 IV - 32...
  • Page 73 (16) Remove the platen as follows: At the left end of the platen frame, remove the platen gear (gear 25/27) by pulling its pawl outwards and then remove the platen shaft bushing L. At the right end, remove the platen shaft bushing R by pulling its pawls outwards. Move the platen to the left to take out the right end from the platen frame and then take it out to the right.

  • Page 74: Cover Stopper And Platen Frame Assy

    Cover Stopper and Platen Frame ASSY TIP: Only when you need to remove the platen frame from the main frame, remove the cover stopper. When accessing other components, keep the cover stopper in place for easier handling. (1) Remove the screw from the cover stopper. (2) Lift up the rear end of the cover stopper and open the platen frame ASSY to remove the cover stopper.
  • Page 75 (4) Remove the retaining ring (E5) from the left end of the platen frame and move the frame to the left. The spring washer also comes off. NOTE: Take care not to drop the retaining ring inside the main frame. If you drop it, you need to remove the bottom plate to take it out.

  • Page 76: Bottom Plate

    Bottom Plate (1) Place the machine upside down. (2) Remove the seven screws from the bottom plate. (3) Slightly lift up the bottom plate and disconnect the grounding terminal. (4) Remove the bottom plate together with the insulation sheet. IV - 36...

  • Page 77: Power Supply Pcb, Main Pcb, And Ncu Pcb

    1.10 Power Supply PCB, Main PCB, and NCU PCB (1) Unhook the head-power harness from latch "B" (together with the PC I/F modular harness since the head-power harness is routed under the PC I/F modular harness through the duct when viewed from the bottom). (2) Pull out the AC cord bushing from the main frame.
  • Page 78 IV - 38...
  • Page 79 Reassembling Notes • When routing the harnesses, refer to Section 1.17. • After you replace the main PCB, be sure to follow the flowchart given below. IV - 39...

  • Page 80: Speaker, Pc I/F Modular Assy, And Ribbon Shaft Stopper Spring

    1.11 Speaker, PC I/F Modular ASSY, and Ribbon Shaft Stopper Spring (1) Pull the speaker support spring to the right and lift up the speaker. The spring also comes off. (2) Slightly lift up the main PCB (if mounted) and disconnect the speaker harness from the PCB. (3) Unhook the PC I/F modular harness (which is routed through the duct) from latches “B”...

  • Page 81: Drive Unit, Motor, And Main-Head Harness

    1.12 Drive Unit, Motor, and Main-Head Harness (1) Slightly lift up the main PCB (if mounted), unhook the motor harness from latch "D," and disconnect the harness from the PCB. (2) Slightly lift up the main PCB (if mounted), unhook the solenoid harness from latches "E" and “G”...

  • Page 82: Panel-Lock Leaf Springs

    1.13 Panel-lock Leaf Springs (1) Remove the panel-lock leaf springs by pushing them up with your finger from the bottom. IV - 42...

  • Page 83: Cover Sensor Actuators And Pinch Roller

    1.14 Cover Sensor Actuators and Pinch Roller (1) Pull up the cover sensor actuator A and turn it to separate from the actuator B. The spring pops up and the actuator B drops. (2) Remove the harness guide film. NOTE: This film is attached to the main frame with double-sided adhesive tape. This film can be usable again as long as it is adhesive.

  • Page 84: Document Rear Sensor Actuator, Separation Roller, And Ribbon Sensor Actuator

    1.15 Document Rear Sensor Actuator, Separation Roller, and Ribbon Sensor Actuator (1) Turn up the document rear sensor actuator to the front and pull it up. (2) Push lock "a" (in the direction of arrow •) and pull the separation roller gear to the right (in the direction of arrow ‚).

  • Page 85: Handset Mount,* Hook Switch Pcb,* And Dummy Mount

    1.16 Handset Mount,* Hook Switch PCB,* and Dummy Mount** (*For models except the FAX-910, **For the FAX-910 only) (1) Insert the tip of a flat screwdriver into the slits of the handset mount* (or the dummy mount**) and unhook the mount from the main frame. (2) To replace the hook switch PCB*, you need to disconnect the hook switch harness from the main PCB.

  • Page 86: Harness Routing

    1.17 Harness Routing IV - 46...

  • Page 87: Lubrication

    LUBRICATION Apply the specified lubricants to the lubrication points as shown below. Molykote EM-30L or EM-30LG For points , apply a rice-sized pinch of grease (6 mm Floil GE-334C For points , apply half of a rice-sized pinch of grease (3 mm [ 1 ] Control panel ASSY IV - 47...
  • Page 88 IV - 48...

  • Page 89: 2 ] Lf Roller Assy

    [ 2 ] LF roller ASSY [ 3 ] Platen frame ASSY IV - 49...
  • Page 90 IV - 50...

  • Page 91: 4 ] Separation Roller And Main Frame

    [ 4 ] Separation roller and main frame IV - 51...
  • Page 92 CHAPTER V. MAINTENANCE MODE...
  • Page 93 CONTENTS ENTRY INTO THE MAINTENANCE MODE ............V-1 LIST OF MAINTENANCE-MODE FUNCTIONS ............V-2 DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS ....V-4 EEPROM Parameter Initialization ..............V-4 Printout of Scanning Compensation Data ............V-5 ADF Performance Test................... V-7 Test Pattern 1 ....................V-8 Firmware Switch Setting and Printout ............

  • Page 94: Entry Into The Maintenance Mode

    1. ENTRY INTO THE MAINTENANCE MODE FAX750/FAX770/FAX870MC/MFC970MC: To make the facsimile equipment enter the maintenance mode, press the Function, *, 2, 8, 6, and 4 keys in this order. Within 2 seconds FAX-910/FAX-920/FAX-921/FAX-930/FAX-931/MFC-925: To make the facsimile equipment enter the maintenance mode, press the Menu, *, 2, 8, 6, and 4 keys in this order. Within 2 seconds The equipment beeps for approx.

  • Page 95: List Of Maintenance-Mode Functions

    2. LIST OF MAINTENANCE-MODE FUNCTIONS Maintenance-mode Functions Function Reference Code Function Subsection (Page) EEPROM Parameter Initialization 3.1 (V-4) Printout of Scanning Compensation Data 3.2 (V-5) ADF* Performance Test 3.3 (V-7) Test Pattern 1 3.4 (V-8) Firmware Switch Setting 3.5 (V-9) Printout of Firmware Switch Data 3.5 (V-49) Operational Check of LCD...
  • Page 96 - - - - - - - - - - - - - - - - - - - - - - - - - - IMPORTANT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Basically, the maintenance-mode functions listed on the previous page should be accessed by service personnel only.

  • Page 97: Detailed Description Of Maintenance-Mode Functions

    3. DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS EEPROM Parameter Initialization Function The equipment initializes the parameters, user switches, and firmware switches registered in the EEPROM, to the initial values. Entering the function code 01 initializes all of the EEPROM areas, but entering 91 does not initialize some areas, as listed below. Function code Data item Maintenance-mode functions...

  • Page 98: Printout Of Scanning Compensation Data

    Printout of Scanning Compensation Data Function The equipment prints out the white and black level data for scanning compensation. Operating Procedure Do not start this function merely after powering on the equipment but start it after carrying out a sequence of scanning operation. Unless the equipment has carried out any scanning operation, this function cannot print out correct scanning compensation data.
  • Page 99 Scanning Compensation Data List V - 6...

  • Page 100: Adf Performance Test

    ADF Performance Test Function The equipment counts the documents fed by the automatic document feeder (ADF) and displays the count on the LCD for checking the ADF performance. Operating Procedure (1) Set documents (Allowable up to the ADF capacity) in the initial stage of the maintenance mode.

  • Page 101: Test Pattern 1

    Test Pattern 1 Function This function, much like the copying function, prints out test pattern 1 to allow the service personnel to check for record data missing or print quality. Operating Procedure Press the 0 and 9 keys in this order in the initial stage of the maintenance mode. The figure below shows test pattern 1.

  • Page 102: Firmware Switch Setting And Printout

    Firmware Switch Setting and Printout [ A ] Firmware switch setting Function The facsimile equipment incorporates the following firmware switch functions (WSW01 through WSW36) which may be activated with the procedures using the control panel keys and buttons. The firmware switches have been set at the factory in conformity to the communications standards and codes of each country.
  • Page 103 Operating Procedure (1) Press the 1 and 0 keys in this order in the initial stage of the maintenance mode. The equipment displays the "WSW00" on the LCD and becomes ready to accept a firmware switch number. (2) Enter the desired number from the firmware switch numbers (01 through 36). The following appears on the LCD: WSWXX = 0 0 0 0 0 0 0 0 (3) Use the...
  • Page 104 Detailed Description for the Firmware Switches WSW01 (Dial pulse setting) Selector Function Setting and Specifications No. 1 2 Dial pulse generation mode 10-N No. 3 4 60 ms Break time length in pulse dialing 67 ms 40 ms (for 16 PPS) 64 ms (at 106-ms intervals) No.
  • Page 105 Selector 7: Switching between pulse (DP) and tone (PB) dialing, by the function switch This selector determines whether or not the dialing mode may be switched between the pulse (DP) and tone (PB) dialing by using the function switch. Selector 8: Default dialing mode, pulse (DP) or tone (PB) dialing This selector sets the default dialing mode (pulse dialing or tone dialing) which may be changed by the function switch.
  • Page 106 WSW03 (PABX* mode setting) Selector Function Setting and Specifications CNG detection when sharing a modular wall socket with a 0: A 1: B telephone No. 2 3 4 0 0 0 : 50 ms 0 0 1 : 210 ms Min.
  • Page 107 Selectors 6 and 7: Dial tone detection in PABX These selectors activate or deactivate the dial tone detection function which detects a dial tone when a line is connected to the PABX. Setting both of these selectors to “1” activates the dial tone detection function so that the equipment starts dialing upon detection of a dial tone when a line is connected.
  • Page 108 WSW04 (TRANSFER facility setting) Selector Function Setting and Specifications Earth function in transfer facility 0: Provided 1: Not provided No. 2 3 Dual tone detection frequency in 350 and 440 Hz (A) ICM recording 440 and 480 Hz (B) 480 and 620 Hz (C) Tone detection sensitivity in ICM 0: OFF 1: High...
  • Page 109 WSW05 (1st dial tone and busy tone detection Selector Function Setting and Specifications No. 1 2 3 0 0 0 3.5 sec. WAIT 0 0 1 7.0 sec. WAIT 0 1 0 10.5 sec. WAIT 1st dial tone detection 0 1 1 14.0 sec.
  • Page 110 Selector 4: Max. pause time allowable for remote ID code detection This selector sets the maximum pause time allowable for detecting the second digit of a remote ID code after detection of the first digit in remote reception. If selector 4 is set to "0" (2 seconds), for instance, only a remote ID code whose second digit is detected within 2 seconds after detection of the first digit will become effective so as to activate the remote function.
  • Page 111 WSW06 (Pause key setting and 2nd dial tone detection) Selector Function Setting and Specifications No. 1 2 3 0 0 0 : No pause 0 0 1 : 3.5 sec. WAIT 0 1 0 : 7 sec. WAIT 0 1 1 : 10.5 sec.
  • Page 112 Selectors 1 through 3: Pause key setting and 2nd dial tone detection Selectors No WAIT is inserted even if the Pause key is pressed. If you press the Pause key during dialing, the facsimile equipment will insert WAIT as defined in the above table. If the Pause key is pressed repeatedly, the equipment inserts the specified WAIT multiplied by the number of depressions.
  • Page 113 WSW07 (Dial tone setting 1) Selector Function Setting and Specifications No. 1 2 Frequency band range Narrows by 10 Hz Initial value Widens by 10 Hz Line current detection 0: No 1: Yes No. 4 5 6 0 0 : -21 dBm 0 1 : -24 dBm...
  • Page 114 WSW08 (Dial tone setting 2) Selector Function Setting and Specifications No. 1 2 3 0 0 0 : 50 ms 0 0 1 : 210 ms 0 1 0 : 500 ms 1st dial tone detection time length 0 1 1 : 800 ms 1 0 0 : 900 ms...
  • Page 115 WSW09 (Protocol definition 1) Selector Function Setting and Specifications Frame length selection 256 octets 1: 64 octets Use of non-standard commands Allowed 1: Prohibited No. 3 4 times No. of retries 3 times 2 times 1 time T5 timer 300 sec. 60 sec.
  • Page 116 WSW10 (Protocol definition 2) Selector Function Setting and Specifications Switching of DPS, following the 0: No 1: Yes CML ON/OFF Time length from transmission of 0: 100 ms 1: 50 ms the last dial digit to CML ON Time length from CML ON to CNG 0: 2 sec.
  • Page 117 WSW11 (Busy tone setting) Selector Function Setting and Specifications Narrows by 10 Hz Frequency band range Initial value Widens by 10 Hz Not used. 1: 400-600/400-600 ms 1: 175-440/175-440 ms ON/OFF time length ranges (More than one setting allowed) 1: 700-800/700-800 ms 1: 110-410/320-550 ms 1: 100-660/100-660 ms NOTE: WSW11 is not applicable in those countries where no busy tone detection is supported.
  • Page 118 WSW12 (Signal detection condition setting) Selector Function Setting and Specifications No. 1 1500 ms Min. OFF time length of calling 500 ms signal (Ci) 700 ms 900 ms No. 3 6 sec. Max. OFF time length of calling 7 sec. signal (Ci) 9 sec.
  • Page 119 WSW13 (Modem setting) Selector Function Setting and Specifications No. 1 0 km Cable equalizer 1.8 km 3.6 km 5.6 km No. 3 -43 dBm Reception level -47 dBm -49 dBm -51 dBm 0: 0 dB 1: 8 dB 0: 0 dB 1: 4 dB Modem attenuator 0: 0 dB...
  • Page 120 WSW14 (AUTO ANS facility setting) Selector Function Setting and Specifications 13 Hz Frequency band selection 15 Hz (Lower limit) 23 Hz 20 Hz Frequency band selection 30 Hz (Upper limit) 55 Hz 70 Hz Fixed to once Fixed to 2 times Fixed to 3 times Fixed to 4 times 1 to 2 times...
  • Page 121 WSW15 (REDIAL facility setting) Selector Function Setting and Specifications No. 1 5 minutes Selection of redial interval 1 minute 2 minutes 3 minutes No. 3 16 times 1 times No. of redialings 2 times 3 times 15 times Redialing for no response sent Redialing No redialing from the called terminal...
  • Page 122 WSW16 (Function setting 1) Selector Function Setting and Specifications Not used. CCITT superfine recommendation 0: OFF 1: ON Not used. Max. document length limitation 0: 400 cm 1: 90 cm Stop key pressed during reception 0: Not functional 1: Functional Selector 2: CCITT superfine recommendation If this selector is set to "1,"...
  • Page 123 WSW17 (Function setting 2) Selector Function Setting and Specifications No. 1 No alarm Off-hook alarm Always valid Valid except when 'call reservation' is selected. Power failure report output 1: OFF Calendar clock/prompt alternate 1: YES display Calendar clock type U.S.A. type 1: European type Error indication in activity report 1: YES...
  • Page 124 WSW18 (Function setting 3) Selector Function Setting and Specifications Not used. No. 2 40 sec. Detection enabled time for CNG 0 sec. (No detection) and no tone 5 sec. 80 sec. Not used. Registration of station ID Permitted Prohibited No. 7 No monitoring Up to phase B at the calling station only...
  • Page 125 WSW19 (Transmission speed setting) Selector Function Setting and Specifications No. 1 No. 4 First transmission speed choice 2,400 bps for fallback 4,800 bps 7,200 bps 9,600 bps 12,000 bps * Last transmission speed choice for fallback 14,400 bps * Not used. V.
  • Page 126 WSW20 (Overseas communications mode setting) Selector Function Setting and Specifications EP* tone prefix 0: OFF 1: ON Overseas communications mode 0: 2100 Hz 1: 1100 Hz (Reception) Overseas communications mode 0: OFF 1: Ignores DIS once. (Transmission) Min. time length from reception of 100 ms CFR to start of transmission of 200 ms...
  • Page 127 WSW21 (TAD setting 1) Selector Function Setting and Specifications No. 1 : No detection : 1 sec. : 2 sec. Max. waiting time for voice signal : 3 sec. : 8 sec. : 31 sec. No. 6 For U.S.A. Two-way recording Except for U.S.A.
  • Page 128 WSW22 (ECM and caller ID setting) Selector Function Setting and Specifications ECM* in sending 0: ON 1: OFF ECM* in receiving 0: ON 1: OFF Call Waiting Caller ID 0: ON 1: OFF Not used. 0: 0% 1: 8% 0: 0% 1: 4% Acceptable TCF bit error rate (%) (Only at 4800 bps)
  • Page 129 WSW23 (Communications setting) Selector Function Setting and Specifications Starting point of training check 0: From the head of a series of zeros (TCF) 1: From any arbitrary point Allowable training error rate 0.5% Decoding error rate for transmission of RTN Issue of RTN at the occurrence of 0: YES a pagination error...
  • Page 130 WSW24 (TAD setting 2) Selector Function Setting and Specifications 15 sec. Maximum OGM recording time 20 sec. 30 sec. 50 sec. Time length from CML ON to 4 sec. start of pseudo ring backtone 3 sec. transmission 2 sec. 1 sec. 0 dB 8 dB Attenuator for playback of ICM/...
  • Page 131 WSW25 (TAD setting 3) Selector Function Setting and Specifications Not used. No. 5 2 sec. 4 sec. 6 sec. Pause between paging number 8 sec. and PIN 10 sec. 12 sec. 14 sec. 16 sec. Not used. NOTE: Selectors 5 through 7 are applicable to the U.S.A. and Canadian versions of the FAX770/ FAX870MC/MFC970MC.
  • Page 132 WSW26 (Function setting 4) Selector Function Setting and Specifications Application of DC wetting pulse 0: OFF 1: ON Overvoltage limiter at the applying 0: ON 1: OFF time of a wetting pulse Not used. No. 4 No. of CNG cycles to be detected (when the line is connected via the external telephone except in the external TAD mode)
  • Page 133 WSW27 (Function setting 5) Selector Function Setting and Specifications Definition of programmable key TEL key TEL/POLLING key Ringer OFF setting Automatic playback of OGM at the start time of OGM ON mode Detection of distinctive ringing pattern Not used. NOTE: Selector 1 is not applicable to the U.S.A. versions. NOTE: Selector 3 is applicable to those models equipped with a built-in TAD.
  • Page 134 WSW28 (Function setting 6) Selector Function Setting and Specifications No. 1 2 3 0 0 0 0 dB 0 0 1 +1 dB Transmission level of DTMF high- 0 1 0 +2 dB band frequency signal 0 1 1 +3 dB 1 0 0 0 dB 1 0 1...
  • Page 135 WSW29 (Function setting 7) Selector Function Setting and Specifications No. 1 2 3 0 0 0 -47.0 dBm 0 0 1 -48.5 dBm Compression threshold level for 0 1 0 -50.0 dBm voice signals inputted via the 0 1 1 -51.5 dBm telephone line in the built-in TAD 1 0 0...
  • Page 136 WSW30 (Function setting 8) Selector Function Setting and Specifications 1 2 3 0 0 0 -38.0 dBm 0 0 1 -39.5 dBm Detection level of dial tone or 0 1 0 -41.0 dBm busy tone for the built-in TAD 0 1 1 -42.5 dBm operation 1 0 0...
  • Page 137 WSW31 (Function setting 9) Selector Function Setting and Specifications Not used. Default reduction rate for failure of automatic reduction during 0: 100% 1: 50% recording Not used. Minimum short-OFF duration in 0: 130 ms 1: 90 ms distinctive ringing Not used. NOTE: Selector 5 is applicable in those areas where the distinctive ringing is supported.
  • Page 138 WSW32 (Function setting 10) Selector Function Setting and Specifications Not used. No. 5 Standard Default resolution Fine Super fine Photo No. 7 Automatic Default contrast Super light Super dark Selectors 5 and 6 Default resolution These selectors set the default resolution which applies when the equipment is powered up or completes a transaction.
  • Page 139 WSW33 (Function setting 11) Selector Function Setting and Specifications No. 1 -42.5 dBm -44.0 dBm Detection threshold level for voice signals inputted via the -45.5 dBm telephone line in the built-in TAD -47.0 dBm operation -48.5 dBm -50.0 dBm -51.5 dBm -53.0 dBm No.
  • Page 140 WSW34 (Function setting 12 Selector Function Setting and Specifications No. 1 0 sec. Erasing time length of ICM tone 1 sec. recorded preceding the tone 2 sec. detection starting point in the case 3 sec. of automatic line disconnection due 4 sec.
  • Page 141 WSW35 (Function setting 13) Selector Function Setting and Specifications No. 1 2 3 4 0 0 0 : No detection Detection time length of the 0 0 1 : 1 sec. disconnection tone in ICM 0 1 0 : 2 sec. recording 1 0 0 : 4 sec.
  • Page 142 [ B ] Printout of firmware switch data Function The equipment prints out the setting items and contents specified by the firmware switches. Operating Procedure (1) Press the 1 key twice in the initial stage of the maintenance mode. The "PRINTING" will appear on the LCD. (2) The equipment prints out the configuration list as shown in the figure below.

  • Page 143: Operational Check Of Lcd

    Operational Check of LCD Function This function allows you to check whether the LCD on the control panel works normally. Operating Procedure (1) Press the 1 and 2 keys in this order in the initial stage of the maintenance mode. The LCD shows (2) Press the Start key.
  • Page 144 FAX750/FAX770/FAX-910/FAX-920/FAX-921/MFC-925 FAX870MC/FAX-930/FAX-931/MFC970MC Key & Button Entry Order V - 51...

  • Page 145: Sensor Operational Check

    Sensor Operational Check Function This function allows you to check that the seven sensors (document front sensor, document rear sensor, cover sensor, paper ejection sensor, paper-edge sensor, ribbon sensor, and hook switch sensor*) operate correctly. (*In the FAX-910, the hook switch sensor serves no function.) Operating Procedure (1) Press the 3 and 2 keys in this order in the initial stage of the maintenance mode.

  • Page 146: Fine Adjustment Of Scanning Start/End Position

    Fine Adjustment of Scanning Start/End Position Function This function allows you to adjust the scanning start/end position. Operating Procedure (1) Press the 5 and 4 keys in this order in the initial stage of the maintenance mode. The LCD shows the current scanning position correction value as shown at right.

  • Page 147: Cis Scanner Area Setting

    3.10 CIS Scanner Area Setting Function The equipment sets the CIS scanner area and stores it into the EEPROM. Operating Procedure (1) Press the 5 key twice in the initial stage of the maintenance mode. The "SCANNER AREA SET" will appear on the LCD. The equipment checks and sets the area to be scanned.

  • Page 148: Equipment Error Code Indication

    3.12 Equipment Error Code Indication Function This function displays an error code of the last error on the LCD. Operating Procedure (1) Press the 8 and 2 keys in this order in the initial stage of the maintenance mode. The LCD shows the "MACHINE ERROR _ _" (for 2-digit error code indication) or "MACHINE ERR _ _ _ _"...

  • Page 149: Document Draw Adjustment

    3.14 Document Draw Adjustment After replacement of the main PCB or CIS, or if data stored in the EEPROM is damaged, you need to carry out this procedure by using the TC-027 chart. Function This function adjusts how much the document is drawn in, starting at the point when the document rear sensor is turned on until the leading edge of the document reaches the scanning start position.
  • Page 150 CHAPTER VI. ERROR INDICATION AND TROUBLESHOOTING...
  • Page 151 CONTENTS ERROR INDICATION....................VI -1 1.1 Equipment Errors ....................VI-1 [ 1 ] Error messages on the LCD ............. VI-1 [ 2 ] Error codes shown in the "MACHINE ERROR _ _" message ..........VI-3 1.2 Communications Errors ..................VI-5 TROUBLESHOOTING ....................

  • Page 152: Error Indication

    1. ERROR INDICATION To help the user or the service personnel promptly locate the cause of a problem (if any), the facsimile equipment incorporates the self-diagnostic functions which display error messages for equipment errors and communications errors. For the communications errors, the equipment also prints out the transmission verification report and the communications list.
  • Page 153 Messages on the LCD Probable Cause DOCUMENT JAM Document loading error (1) The document rear sensor detects no leading edge of a document within 10 seconds from the start of document loading operation. (The document rear sensor stays OFF even after the document has been fed when the document front sensor was ON.) (2) The loaded document is too short.

  • Page 154: 2 ] Error Codes Shown In The "Machine Error

    [ 2 ] Error codes shown in the "MACHINE ERROR _ _" message Error Code Error factor (Hex.) ( 85 Ink ribbon empty. ) ( 87 Fails to complete the sequence of recording operation. ) Wrong or weak contact of the recording head connectors. ( 8B Recording head overheat.
  • Page 155 Error Code Error factor (Hex.) ( 82xx Although recording paper has been fed by 150 mm after the start of recording, the paper-edge sensor is still OFF. ) ( 8303 Although recording paper has been fed by 360 mm after the start of recording, the paper-edge sensor is still ON.

  • Page 156: Communications Errors

    Communications Errors If a communications error occurs, the facsimile equipment emits an audible alarm (intermittent beeping) for approximately 4 seconds, displays the corresponding error message, and prints out the transmission verification report if the equipment is in sending operation. VI - 5...
  • Page 157 n n Definition of Error Codes on the Communications List Calling Code 1 Code 2 Causes Wrong number called. No dial tone detected before start of dialing. Busy tone detected before dialing. 2nd dial tone not detected. No loop current detected.* Busy tone detected after dialing or called.
  • Page 158 Compatibility [checking the NSF and DIS] Code 1 Code 2 Causes Remote terminal only with V.29 capability in 2400 or 4800 bps transmission. Remote terminal not ready for polling. Remote terminal not equipped with password function or its password switch OFF. Remote terminal not equipped with or not ready for confidential mail box function.
  • Page 159 Instructions received from the remote terminal [checking the NSC, DTC, NSS, and DCS] Code 1 Code 2 Causes Illegal coding system requested. Illegal recording width requested. ECM requested although not allowed. Polled while not ready. No document to send when polled. Nation code or manufacturer code not coincident.
  • Page 160 ID checking Code 1 Code 2 Causes Password plus "lower 4 digits of telephone number" not coincident. Password not coincident. Polling ID not coincident. Entered confidential mail box ID uncoincident with the mail box ID. Relay broadcasting ID not coincident. Entered retrieval ID uncoincident with that of the mail box ID.
  • Page 161 Signal isolation Code 1 Code 2 Causes Unable to detect video signals and commands within 6 seconds after CFR is transmitted. Received PPS containing invalid page count or block count. (10) Video signal reception Code 1 Code 2 Causes Error correction sequence not terminated even at the final transmission speed for fallback.
  • Page 162 (12) Maintenance mode Code 1 Code 2 Causes Failed to detect 1300 Hz signal in burn-in operation. Failed to detect PB signals in burn-in operation. Failed to detect any command from the RS-232C interface in burn- in operation. (13) Equipment error Code 1 Code 2 Causes...

  • Page 163: Troubleshooting

    2. TROUBLESHOOTING Introduction This section gives the service personnel some of the troubleshooting procedures to be followed if an error or malfunction occurs with the facsimile equipment. It is impossible to anticipate all of the possible problems which may occur in future and determine the troubleshooting procedures, so this section covers some sample problems.

  • Page 164: Troubleshooting Procedures

    Troubleshooting Procedures [ 1 ] Control panel related Trouble Check: (1) LCD shows nothing. • Panel-main harness between the main PCB and the control PCB • Interfaces between the main PCB, NCU PCB and power supply • LCD • Control panel PCB •...

  • Page 165: 3 ] Communications Related

    [ 3 ] Communications related Trouble Check: (1) No tone is transmitted. • Main PCB • NCU PCB [ 4 ] Paper/document feeding related Trouble Check: (1) Neither "COPY: PRESS • Sensors by using the maintenance-mode function code 32. COPY" nor "FAX: NO. & (Refer to Chapter V, Section 3.8, "Sensor Operational Check".) START"...

  • Page 166: 5 ] Print-Image Related

    [ 5 ] Print-image related If the received or sent image has any problem, first make a copy with the facsimile equipment. If the copied image is normal, the problem may be due to the remote terminal; if it is abnormal, proceed to the following checks: Trouble Check:...

  • Page 167: 6 ] Others

    Trouble Check: (7) Image distortion In communications • Error code displayed (Refer to Section 1, "ERROR INDICATION" in this chapter.) • NCU PCB • Main PCB At the scanner • Separation roller and its related sections • LF roller and its related gears •...
  • Page 168 July ’98 5X4401 Printed in Japan...
  • Page 169 FAX750/FAX770/FAX870MC FAX860/FAX880/FAX1270T FAX-910/FAX-920/FAX-921/FAX-930/FAX-931 FAX-917/FAX-940 MFC-925/MFC970MC/MFC1970MCT Appendix 1. EEPROM Customizing Codes...
  • Page 170 EEPROM Customizing Codes This function allows you to customize the EEPROM according to language, function settings, and firmware switch settings. The customizing codes list is given on the next page. n Operating Procedure (1) FAX750/FAX770/FAX860/FAX870MC/FAX880/FAX1270T/MFC970MC/MFC1970MCT: Within 2 seconds Press the Function, *, 2, 8, 6, and 4 keys in this order to make the equipment enter the maintenance mode.
  • Page 171 n EEPROM Customizing Codes List Model Versions FAX750 FAX770 FAX870MC MFC970MC U.S.A. 1001 1101 1001 1001 U.S.A. (w/ letter Z) 3001 3101 3001 3001 U.S.A. (w/ letter Y) 9101 CANADA 0002 0102 0002 0002 CANADA(w/ Z) 2002 2102 2002 2002 ASIA 0040 0040...
  • Page 172 Model Versions FAX-910 FAX-920/921/ MFC-925 FAX-930/931/ MFC-970MC GERMANY 0003 0003 0003 0003 0004 0004 0004 FRANCE 0005 0005 0005 AUSTRALIA 0006 0006 0006 0006 NORWAY 0007 0007 0007 BELGIUM 0008 0008 0008 HOLLAND 0009 0009 0009 SWITZERLAND 0010 0010 0010 0010 IRELAND 0011...
  • Page 173 FAX750/FAX770/FAX870MC FAX860/FAX880/FAX1270T FAX-910/FAX-920/FAX-921/FAX-930/FAX-931 MFC-925/MFC970MC/MFC1970MCT Appendix 2. Circuit Diagrams A. Main PCB B. Network Control Unit (NCU) PCB C. Control Panel PCB D. Power Supply PCB...
  • Page 174 + 5 V R H 5 V A 4 3 R S T L 1 6 A , 4 7 B R 6 2 T 7 D 9 6 1 . 5 K V C C O U T R S T R T C C O N R S T L 1 4 A...
  • Page 175 + 2 5 V + 5 V + 5 V G N D + 5 V C 6 3 G N D C 2 4 C C 1 0 4 C C 1 0 4 C 7 6 P D 2 7 C 2 0 0 1 B - 1 5 R 3 6 1 6 V 4 7 4 .
  • Page 176 R 5 V + 5 V C I S + 2 5 V + 5 V R 5 V S E N S O R + 2 5 V R 7 3 4 7 0 R 0 V G N D R 8 4 R 8 3 1 5 C...
  • Page 179 + 5 V R H 5 V A 4 3 R S T L 1 6 A , 1 6 B , 3 4 D , 4 7 B , 5 7 E R 1 0 4 T 7 D 9 8 1 .
  • Page 180 + 2 5 V + 5 V + 5 V G N D + 5 V C 8 0 G N D C 2 8 C C 1 0 4 C C 1 0 4 C 9 6 P D 2 7 C 2 0 0 1 B - 1 5 R 2 6 + 5 V 1 6 V 4 7...
  • Page 181 R 5 V + 5 V C I S + 2 5 V + 5 V R 5 V S E N S O R + 2 5 V R 1 1 0 4 7 0 R 1 1 4 R 1 1 3 1 2 E 1 0 0 K...
  • Page 183 P C I + 5 V L 1 0 2 B L 1 0 2 B C K S L 1 0 2 B T X D L 1 0 2 B R X D L 1 0 2 B C T S L 1 0 2 B C R X D...
  • Page 185 + 2 6 V C R 1 M Z F - 2 4 H G C M L O U A Z - S S - 1 2 4 D R A 3 5 1 M x 2 N C U S L S 0 V J W X 2 R L 1...
  • Page 186 + 2 6 V C R 1 M Z F - 2 4 H G C M L O U A Z - S S - 1 2 4 D R A 3 5 1 x 2 N C U S L S 0 V S B T 0 2 6 0 X 2 S B T 0 2 6 0 x 2...
  • Page 187 + 5 V R E F Z D 2 A - O U T R D P S 4 . 3 V X 2 Z D 1 S 0 V T E L O F F J W 9 ( 5 ) J W 7 ( 5 ) J P 9 ( C ) C M L...
  • Page 188 U G 6 7 1 1 - 0 X X U G 6 7 1 2 - 0 X X A S S Y A S S Y A S S Y I T E M P H 3 T L P 6 2 0 G R T L P 6 2 0 G R R C H 8 5 5 - 3 3 2 K R C H 8 5 5 - 3 3 2 K...
  • Page 189 R E F + 5 V S P 1 Z D 2 A - O U T R D P S Z D 1 T E L O F F S 0 V J W 9 ( 5 ) J W 7 ( 5 ) J P 9 ( C ) C M L ( 1 0 )
  • Page 190 U G 6 7 1 5 - 0 X X A S S Y A S S Y I T E M P H 3 T L P 6 2 0 G R S P 2 A S S Y A S S Y A S S Y A S S Y...
  • Page 191 F L 5 R 2 0 0 P N 4 . 3 V R E F + 5 V S P 1 Z D 2 A - O U T R D P S Z D 1 T E L O F F S 0 V J W 9 ( 5 )
  • Page 192 R E F + 5 V S P 1 Z D 2 A - O U T R D P S Z D 1 T E L O F F S 0 V J W 9 ( 5 ) J W 7 ( 5 ) J P 9 ( C ) C M L ( 1 0 )
  • Page 193 + 5 V + 5 V 5 2 0 8 9 - 1 4 2 0 C C 1 0 4 S L W 1 3 S - 5 C 7 G N D B U 1 2 1 0 2 - P N L 2 + 5 V C C 1 0 4 K O 0...
  • Page 194 T 5 - U S - P A N E L ( B A S E ) K E Y M A T R I X R E F E R E N C E T A B L E K E Y N O .
  • Page 195 + 5 V + 5 V 5 2 0 8 9 - 1 4 2 0 G N D H L W 1 3 S - 6 / 6 C 7 + 5 V K O 0 K O 1 R S T G N D K O 2...
  • Page 196 T 5 - U S - P A N E L ( M C / B A S E ) K E Y M A T R I X R E F E R E N C E T A B L E K E Y N O .
  • Page 199 FACSIMILE EQUIPMENT PARTS REFERENCE LIST MODEL: FAX-910/920/921/930/931/940 MFC-925 (For Germany / United Kingdom / France / Australia / Norway / Belgium / Netherlands / Switzerland / Ireland / Finland / Denmark / Austria / Spain / Italy / Israel / Sweden / New Zealand / Czechoslovakia / Euro Generic) MFC-970MC (For Australia / New Zealand)
  • Page 200 © Copyright Brother 1998 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 prior notice.
  • Page 201 NOTES FOR USING THIS PARTS REFERENCE LIST 1. In the case of ordering parts, it needs mentioning the following items: (1) Code (2) Q' ty (3) Description Note: No orders without Parts Code or Tool No. can be accepted. [Example] REF.NO.
  • Page 203 REF.NO. CODE Q'TY DESCRIPTION REMARKS PLATEN FRAME ATTACHMENT UF9650001 DRIVE UNIT Z25947001 MOTOR U09759001 SCREW, PAN (WASHER) M3X6 DB UF9693001 SEPARATION ROLLER GEAR UF6613001 SEPARATION ROLLER UU0244001 LF ROLLER ASSY UF9949001 BEARING, EJECTION ROLLER UG6602001 MOTOR HARNESS UG6683001 CIS UNIT UF9814001 CIS HOLDER, R UF9815001...
  • Page 204 REF.NO. CODE Q'TY DESCRIPTION REMARKS 085310815 TAPTITE, BIND B M3X8 UF9809004 ROM COVER, GRAY(1267) UF4759000 PC I/F COVER, NATURAL, FAX-921/931, FAX-920(WHITE) FOR UK, FAX-920/930 FOR ARL/NZ UF4759002 PC I/F COVER, BLACK, FAX-910/920/930/940 FOR GER/UK/FRA/NOR/CHE/IRE/FIN/DEN/AUS/ISR/SWE/CZE/GNR UF9810001 COVER STOPPER UF9875001 COVER STOPPER SPRING PLATE <Eliminated>...
  • Page 205 REF.NO. CODE Q'TY DESCRIPTION REMARKS FAX-930 FOR UK/CHE/IRE/CZE/GNR UU0161001 CONTROL PANEL ASSY, GRAY(1395), FAX-930 FOR FRA UU0162001 CONTROL PANEL ASSY, GRAY(1395), FAX-930 FOR NOR LE0388001 CONTROL PANEL ASSY, GRAY(1395), FAX-930 FOR FIN LE0390001 CONTROL PANEL ASSY, GRAY(1395), FAX-930 FOR DEN UU0167001 CONTROL PANEL ASSY, GRAY(1395), FAX-930 FOR SWE UU0250002...
  • Page 206 REF.NO. CODE Q'TY DESCRIPTION REMARKS 62-1 LE0741005 CONTROL PANEL, GRAY(1395), FAX-940 FOR FRA 62-1 UU0454006 CONTROL PANEL, WHITE(1138), MFC-970MC FOR ARL/NZ 62-2 UG6619001 PANEL PCB ASSY FOR FAX-910/920/921/MFC-925 62-2 UG6643001 PANEL PCB ASSY FOR FAX-930/931/940/MFC-970MC 62-3 LG2351001 62-4 UG6624001 FPC KEY 62-5 UG6703001 MICROPHONE FOR FAX-930/931/MFC-970MC...
  • Page 207 REF.NO. CODE Q'TY DESCRIPTION REMARKS 62-28 UF9764001 KEY,ONE TOUCH, GRAY(1395), FAX-910/920/930 FOR GER/UK/FRA/NOR/CHE/IRE/FIN/DEN/AUS/ISR/SWE/CZE/GNR 62-28 UF9764002 KEY,ONE TOUCH, WHITE(1397), FAX-920/930 FOR ARL/NZ 62-28 UF9764003 KEY,ONE TOUCH, WHITE(1138), FAX-921/931/MFC-925/970MC FAX-920 FOR UK 62-29 UF9960002 KEY,MC, GRAY(1421), FAX-930 FOR ARL/NZ 62-29 UF9960001 KEY,MC, BLACK(010), FAX-931/940/MFC-970MC, FAX-930 FOR GER/UK/FRA/NOR/CHE/IRE/FIN/DEN/AUS/SWE/CZE/GNR 62-30 UF9767001...
  • Page 208 REF.NO. CODE Q'TY DESCRIPTION REMARKS UG6713006 NCU PCB ASSY, FAX-920/930/MFC-970MC FOR ARL UG6713007 NCU PCB ASSY, FAX-920/930/MFC-925 FOR NOR UG6715008 NCU PCB ASSY, FAX-920/921/931/MFC-925 FOR BEL/CZE UG6716009 NCU PCB ASSY, FAX-921/931/MFC-925 FOR NLD UG6711010 NCU PCB ASSY, FAX-910/920/930/940/MFC-925 FOR CHE UG6713011 NCU PCB ASSY, FAX-920/930 FOR IRE UG6715012...
  • Page 209 REF.NO. CODE Q'TY DESCRIPTION REMARKS U85683001 TELEPHONE LINE CORD, FAX-920 FOR ISR UG3635001 TELEPHONE LINE CORD, FAX-920/MFC-925 FOR SWE UL8218001 TELEPHONE LINE CORD, FAX-930 FOR SWE UG3290001 TELEPHONE LINE CORD, FAX-920/930/MFC-970MC FOR NZ UG3543001 HANDSET CURLED CORD, GRAY(1395), FAX-920/930/940 FOR GER/UK/FRA/NOR/CHE/IRE/FIN/DEN/AUS/ISR/SWE/CZE/GNR UG3543002 HANDSET CURLED CORD, WHITE(1397), FAX-920/930 FOR ARL/NZ...
  • Page 210 REF.NO. CODE Q'TY DESCRIPTION REMARKS (81) UU0628010 OWNER'S MANUAL ASSY, FAX-910 FOR CHE (INCLUDING OPERATIONS MANUAL FAX-910<GERMAN>, OPERATIONS MANUAL FAX-910<FRENCH>(REF.NO.81-1), WARRANTY CARD EUR, SPPED DIAL LABEL FOR FAX-910(REF.NO.94), DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) (81) UU0420003 OWNER'S MANUAL ASSY, FAX-920/930 FOR GER/AUS (INCLUDING OPERATIONS MANUAL FAX-920/930/MFC-925 FOR GER(REF.NO.81-1), WARRANTY CARD EUR, DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE...
  • Page 211 REF.NO. CODE Q'TY DESCRIPTION REMARKS WARRANTY CARD EUR, WARRANTY CARD FRA, DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) (81) UU0423006 OWNER'S MANUAL ASSY, FAX-920/930 FOR ARL (INCLUDING OPERATIONS MANUAL FAX-920/930/MFC-970MC FOR ARL(REF.NO.81-1), QUICK REFERENCE GUIDE FOR ARL/NZ (REF.NO.81-2), DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) (81)
  • Page 212 REF.NO. CODE Q'TY DESCRIPTION REMARKS FOR NLD(REF.NO.81-1), MULTI FUNCTION LINK MANUAL MFC-925 FOR GER/UK/FRA/BEL/NLD/CHE(REF.NO.81-3), WARRANTY CARD EUR, DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) (81) UU0427010 OWNER'S MANUAL ASSY, FAX-920/930 FOR CHE (INCLUDING OPERATIONS MANUAL FAX-920/930/MFC-925 FOR CHE<GERMAN>(REF.NO.81-1), OPERATIONS MANUAL FAX-920/921/930/931/MFC-925 FOR BEL/CHE<FRENCH>...
  • Page 213 REF.NO. CODE Q'TY DESCRIPTION REMARKS WARRANTY CARD EUR, DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) (81) UU0431015 OWNER'S MANUAL ASSY, FAX-921/931 FOR SPA (INCLUDING OPERATIONS MANUAL FAX-921/931 FOR SPA(REF.NO.81-1), WARRANTY CARD EUR, DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) (81) UU0432016 OWNER'S MANUAL ASSY, FAX-921/931 FOR ITA...
  • Page 214 REF.NO. CODE Q'TY DESCRIPTION REMARKS FOR UK/IRE/FIN/ISR/CZE/GNR (81-1) UU0079005 OPERATIONS MANUAL, FAX-920/930/940/MFC-925 FOR FRA (81-1) UU0079006 OPERATIONS MANUAL, FAX-920/930/MFC-970MC FOR ARL (81-1) UU0079007 OPERATIONS MANUAL, FAX-920/930/MFC-925 FOR NOR (81-1) UU0079008 OPERATIONS MANUAL, FAX-921/931/MFC-925 FOR BEL<DUTCH> (81-1) UU0080008 OPERATIONS MANUAL, FAX-920/921/930/931/940/MFC-925 FOR BEL/CHE<FRENCH>...
  • Page 215 REF.NO. CODE Q'TY DESCRIPTION REMARKS (84) LE0349001 CARTON, BROTHER FAX-920 FOR NOR/FIN/DEN/SWE (84) UE1932001 CARTON, BROTHER MFC-925 FOR GER/UK/FRA/BEL/NLD/CHE (84) UE1933001 CARTON, BROTHER MFC-925 FOR NOR/DEN/SWE (84) LE0350001 CARTON, BROTHER FAX-930 FOR GER/UK/FRA/CHE/ IRE/FIN/DEN/AUS/CZE/GNR (84) LE0408001 CARTON, BROTHER FAX-930 FOR ARL/NZ (84) LE0351001 CARTON, BROTHER FAX-930 FOR NOR/SWE...
  • Page 217 1. PLATEN FRAME ATTACHMENT REF.NO. CODE Q'TY DESCRIPTION REMARKS UF9736001 PAPER FEED CHUTE UF9737001 SEPARATION PAD UF9740001 SEPARATION PAD SPRING UG6609001 SENSOR PCB UF9741001 PAPER EDGE SENSOR ACTUATOR UF9742001 PAPER EJECTION SENSOR ACTUATOR UF9744001 CHUTE FILM U24014001 TAPTITE, CUP S M3.0X6 UF9750001 PRESSURE PLATE LINK UF9746001...

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