HP FAX-750 Service Manual

HP FAX-750 Manual

Get HP FAX-750 PDF manuals and user guides View all HP FAX-750 manuals
Add to My Manuals
Save this manual to your list of manuals

HP FAX-750 manual content summary:

  • HP FAX-750 | Service Manual - Page 1
    FACSIMILE EQUIPMENT SERVICE MANUAL MODEL: FAX750/FAX770/FAX870MC FAX-910/FAX-920/FAX-921/FAX-930/FAX-931 MFC-925/MFC970MC
  • HP FAX-750 | Service Manual - 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.
  • HP FAX-750 | Service Manual - Page 3
    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
  • HP FAX-750 | Service Manual - Page 4
    CHAPTER I. GENERAL DESCRIPTION
  • HP FAX-750 | Service Manual - Page 5
    CONTENTS 1. EQUIPMENT OUTLINE I-1 1.1 External Appearance and Weight I-1 1.2 Components...I-1 2. SPECIFICATIONS...I-2
  • HP FAX-750 | Service Manual - Page 6
    1. EQUIPMENT OUTLINE 1.1 External Appearance and Weight The figure below shows the equipment appearance and approximate dimensions. Weight: Machine proper (excluding a ribbon cartridge) In package Approx. 4 kg (8.82 lbs.) Approx. 6 kg (13.23 lbs.) 1.2 Components The equipment consists of the
  • HP FAX-750 | Service Manual - Page 7
    SPECIFICATIONS Fax Forwarding/Paging Fax Retrieval Fax-/Voice-on-demand Fax & Voice Mailbox Help List Missing Link/Multifunction Link Optional Memory Voice Alarm Others FAX750 No * Check your local telephone company for availability of this service. I - 2 FAX770 Thermal transfer White (1397) 15
  • HP FAX-750 | Service Manual - Page 8
    TAD Recording Time Fax Forwarding/Paging Fax Retrieval Fax-/Voice-on-demand Fax & Voice Mailbox Yes Voice-on-demand Yes Yes Ready No No * Check your local telephone company for availability of this service. I - 3 MFC970MC Thermal transfer White (1138) 9 14,400 G3 8.5"/8.5" 10 100 sheets 250 pages
  • HP FAX-750 | Service Manual - Page 9
    Enlargement/Reduction Ratio Multi-Transmission Confidential Mailbox Auto Reduction Message Manager TAD Recording Time Fax Forwarding/Paging Fax Retrieval Fax-/Voice-on-demand Fax & Voice Mailbox Help List MFL PRO for Fax Optional Memory Memo Manager Mute Key Backup for Clock Output Tray Backup for
  • HP FAX-750 | Service Manual - Page 10
    Enlargement/Reduction Ratio Multi-Transmission Confidential Mailbox Auto Reduction Message Manager TAD Recording Time Fax Forwarding/Paging Fax Retrieval Fax-/Voice-on-demand Fax & Voice Mailbox Help List MFL PRO for Fax Optional Memory Memo Manager Mute Key Backup for Clock Output Tray Backup for
  • HP FAX-750 | Service Manual - Page 11
    CHAPTER II. INSTALLATION
  • HP FAX-750 | Service Manual - Page 12
    CHAPTER III. THEORY OF OPERATION
  • HP FAX-750 | Service Manual - Page 13
    CONTENTS 1. OVERVIEW ...III-1 2. 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
  • HP FAX-750 | Service Manual - Page 14
    1. OVERVIEW *Not provided on the FAX-910. III - 1
  • HP FAX-750 | Service Manual - Page 15
    2. 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 2.1
  • HP FAX-750 | Service Manual - Page 16
    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
  • HP FAX-750 | Service Manual - Page 17
    the paper ejection roller. This feeds the paper up to the printing position where the thermal recording head prints, as well as feeding the thermal ink ribbon. STEP 3: In the paper ejection mode The same operation as for STEP 1 takes place so as to eject the paper. III - 4
  • HP FAX-750 | Service Manual - Page 18
    drive unit also rotates. The rotational torque is further transmitted to the ribbon drive gear ("w") which drives the ribbon take-up gear ("a") on the ribbon cartridge, as shown in the figure below (On the inner side of the drive unit). On the outer side of the drive unit and on the
  • HP FAX-750 | Service Manual - Page 19
    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
  • HP FAX-750 | Service Manual - Page 20
    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
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 23
    side of the drive unit also rotates so as to drive the ribbon drive gear ("w") that rotates the ribbon take-up gear ("a") on the ribbon cartridge, as shown on the next page. Arm A Locked by Cutout of Clutch Lever Active Gears on the Outer Side of the Drive Unit and Left
  • HP FAX-750 | Service Manual - Page 24
    Active Gears on the Inner Side of the Drive Unit III - 11
  • HP FAX-750 | Service Manual - Page 25
    unit also rotates so as to drive the friction torque transmission ASSY and ribbon drive gear ("w") that rotates ribbon take-up gear ("a") on the ribbon cartridge, as shown on the next page. Arm A Released from Cutout of Clutch Lever Active Gears on the Outer Side of the Drive Unit and on
  • HP FAX-750 | Service Manual - Page 26
    Active Gears on the Inner Side of the Drive Unit III - 13
  • HP FAX-750 | Service Manual - Page 27
    (Gear 39/62) w: Ribbon drive gear (Gear 25) X: Gear 22/28 Y: Platen gear (Gear 25/27) z: Gear 20 a: Ribbon take-up gear on the ribbon cartridge III - 14
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 29
    enters the light-sensitive transistor. This way, the sensor detects the presence of documents, paper, or ink ribbon. • Cover sensor which detects whether the recording paper cover ASSY is closed. • Hook switch actuator ASSY pops up to release the sensor. *Not provided on the FAX-910. III - 16
  • HP FAX-750 | Service Manual - Page 30
    Location of Sensors and Actuators (1) III - 17
  • HP FAX-750 | Service Manual - Page 31
    Location of Sensors and Actuators (2) *Not provided on the FAX-910. III - 18
  • HP FAX-750 | Service Manual - Page 32
    these sensors: l Paper-edge sensor (PH1) l Paper ejection sensor (PH2) *4 On the hook switch PCB* is the hook switch sensor (SW1). *Not provided on the FAX-910. Configuration of Facsimile Equipment III - 19
  • HP FAX-750 | Service Manual - Page 33
    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 Block Diagram of Main PCB III
  • HP FAX-750 | Service Manual - Page 34
    FAX750/FAX770/FAX-910/FAX-920/FAX-921/MFC-925 FAX870MC/FAX-930/FAX-931/MFC970MC III - 21
  • HP FAX-750 | Service Manual - Page 35
    3.3 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
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 37
    . 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. The calendar clock is backed up by the backup circuit on the main PCB. The panel FPC is a flexible keyboard
  • HP FAX-750 | Service Manual - Page 38
    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. The +6.5V is not stabilized and fed to the Ni-MH battery (on the FAX870MC/FAX-930/FAX931/MFC970MC). The +5V source is fed to the logic on the
  • HP FAX-750 | Service Manual - Page 39
    CHAPTER IV. DISASSEMBLY/REASSEMBLY, LUBRICATION AND ADJUSTMENT
  • HP FAX-750 | Service Manual - Page 40
    and CIS Unit IV-14 1.5 Head Protector, Recording Head ASSY, Head Adjuster, and Recorder Frame ...IV-18 1.6 Recording Paper Cover ASSY and Paper Guides IV-22 1.7 Lock Levers, Chute B ASSY, Gears, Paper Ejection Roller, Paper Feed Roller ASSY, Pressure Plate, Paper Feed Chute and Other Components on
  • HP FAX-750 | Service Manual - Page 41
    1. DISASSEMBLY/REASSEMBLY 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
  • HP FAX-750 | Service Manual - Page 42
    plate Grounding terminal Taptite, cup B M3x8 7 5 ±2 Screw, pan (washer) M4x6DB 1 7 ±2 Min. 1.5 Min. 4 Motor Screw, pan (washer) M3x6DB 1 7 ±2 Min. 3.5 * The control panel PCB of the FAX870MC/FAX-930/FAX-931/MFC970MC is secured with a screw. IV - 2
  • HP FAX-750 | Service Manual - Page 43
    of an external telephone set if connected. (Not shown below.) (2) Remove - the document wire extension, - the paper wire extension, - the paper support, and - the ribbon cartridge. n How to Access the Object Component • On the next page is a disassembly order flow which helps you access the object
  • HP FAX-750 | Service Manual - Page 44
    n Disassembly Order Flow IV - 4
  • HP FAX-750 | Service Manual - Page 45
    hook to release and move the ROM cover to the right. (4) FAX870MC/FAX-930/FAX-931/MFC970MC: To replace the battery ASSY (Ni-MH battery), plug the cord unplugged will lose the settings (e.g., calendar clock, voice messages, and received FAX data) stored in the RAM. If you do not need to replace
  • HP FAX-750 | Service Manual - Page 46
    (5) Remove the ribbon shaft stopper by pushing down the rear end of the stopper lightly with a screwdriver. n 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
  • HP FAX-750 | Service Manual - Page 47
    1.2 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
  • HP FAX-750 | Service Manual - Page 48
    (4) Disconnect the panel-main harness. IV - 8
  • HP FAX-750 | Service Manual - Page 49
    remove the ADF parts (spring covers, spring plates, and separation rubber), remove the screw. (3) To remove the document pressure bar ASSY, pull either of the supports provided on the panel rear cover outwards and lift up the pressure bar. The spring also comes off. IV - 9
  • HP FAX-750 | Service Manual - Page 50
    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. While pressing the boss of the document pressure bar with the tip of a Phillips screwdriver, shift the document pressure bar
  • HP FAX-750 | Service Manual - Page 51
    in the direction of arrow ,. (9) Remove the screw from the document front sensor PCB. (10) FAX750/FAX770/FAX-910/FAX-920/FAX-921/MFC-925: Unhook the control panel PCB from the two "Y" latches. FAX870MC/FAX-930/FAX-931/MFC970MC: Remove the screw from the control panel PCB and unhook the PCB from the
  • HP FAX-750 | Service Manual - Page 52
    IV - 12
  • HP FAX-750 | Service Manual - Page 53
    together, check that the boss of the document pressure bar is fitted in the hole provided in the support. • After reinstalling the assembly of the document pressure bar and its support to the control panel ASSY, attach the white film, referring to the illustration given on page IV-10. IV - 13
  • HP FAX-750 | Service Manual - Page 54
    1.4 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
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - 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. n 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. •
  • HP FAX-750 | Service Manual - Page 58
    1.5 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
  • HP FAX-750 | Service Manual - 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. (5) Remove the three
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 62
    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 arrow ,. (2) Remove the two screws. (3) Lift up the front of the recording paper cover ASSY and take it out to the
  • HP FAX-750 | Service Manual - Page 63
    1.7 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. To remove the platen
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - 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. (8) At the
  • HP FAX-750 | Service Manual - 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. (10) Fully turn the pressure plate
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 69
    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. NOTE: Pulling up the main-sensor harness without pressing down the sensor PCB will cause the
  • HP FAX-750 | Service Manual - Page 70
    - Remove the two screws and lift up the paper feed chute. IV - 30
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 72
    IV - 32
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 74
    1.8 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
  • HP FAX-750 | Service Manual - 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. IV - 35
  • HP FAX-750 | Service Manual - Page 76
    1.9 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
  • HP FAX-750 | Service Manual - Page 77
    • Panel-main harness • PC I/F modular harness • CIS harness • Solenoid harness • Motor harness • Main-head harness • Main-sensor harness NOTE: The FAX870MC/FAX-930/FAX-931/MFC970MC has a Ni-MH battery ASSY. Only when you need to replace the main PCB, disconnect the battery harness. After installing
  • HP FAX-750 | Service Manual - Page 78
    IV - 38
  • HP FAX-750 | Service Manual - Page 79
    n 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
  • HP FAX-750 | Service Manual - Page 80
    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
  • HP FAX-750 | Service Manual - Page 81
    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" and the notch, then
  • HP FAX-750 | Service Manual - Page 82
    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
  • HP FAX-750 | Service Manual - Page 83
    (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
  • HP FAX-750 | Service Manual - Page 84
    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 ,). Then take out
  • HP FAX-750 | Service Manual - Page 85
    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
  • HP FAX-750 | Service Manual - Page 86
    1.17 Harness Routing IV - 46
  • HP FAX-750 | Service Manual - Page 87
    2. 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 mm3). Floil GE-334C For points , apply half of a rice-sized pinch of grease (3 mm3). [ 1 ] Control panel ASSY IV - 47
  • HP FAX-750 | Service Manual - Page 88
    IV - 48
  • HP FAX-750 | Service Manual - Page 89
    [ 2 ] LF roller ASSY [ 3 ] Platen frame ASSY IV - 49
  • HP FAX-750 | Service Manual - Page 90
    IV - 50
  • HP FAX-750 | Service Manual - Page 91
    [ 4 ] Separation roller and main frame IV - 51
  • HP FAX-750 | Service Manual - Page 92
    CHAPTER V. MAINTENANCE MODE
  • HP FAX-750 | Service Manual - Page 93
    CONTENTS 1. ENTRY INTO THE MAINTENANCE MODE V-1 2. LIST OF MAINTENANCE-MODE FUNCTIONS V-2 3. DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS V-4 3.1 EEPROM Parameter Initialization V-4 3.2 Printout of Scanning Compensation Data V-5 3.3 ADF Performance Test V-7 3.4 Test Pattern 1 V-8 3.5
  • HP FAX-750 | Service Manual - Page 94
    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
  • HP FAX-750 | Service Manual - Page 95
    2. LIST OF MAINTENANCE-MODE FUNCTIONS Function Code 01 02 03 04 05 06 07 08 09 10 11 12 13 Maintenance-mode Functions Function EEPROM Parameter Initialization Printout of Scanning Compensation Data ADF* Performance Test Test Pattern 1 Firmware Switch Setting Printout of Firmware Switch Data
  • HP FAX-750 | Service Manual - Page 96
    in the firmware switch tables in Subsection 3.5. The service personnel should instruct end users to follow the procedure given below. (1) FAX750/FAX770/FAX870MC/MFC970MC: Press the Function and Mode keys in this order. FAX-910/FAX-920/FAX-921/FAX-930/FAX-931/MFC-925: Press the Menu and Mode keys
  • HP FAX-750 | Service Manual - Page 97
    as listed below. Data item Function code Maintenance-mode functions User switches Firmware switches Remote activation code Activity report Distinctive ringing number Cover page custom comments Remote access code FAX forwarding/paging Personal mailbox password Telephone function registration
  • HP FAX-750 | Service Manual - Page 98
    3.2 Printout of Scanning Compensation Data n Function The equipment prints out the white and black level data for scanning compensation. n 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
  • HP FAX-750 | Service Manual - Page 99
    Scanning Compensation Data List V - 6
  • HP FAX-750 | Service Manual - Page 100
    3.3 ADF Performance Test n 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. n Operating Procedure (1) Set documents (Allowable up to the ADF capacity) in the initial stage of the maintenance
  • HP FAX-750 | Service Manual - Page 101
    3.4 Test Pattern 1 n 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. n Operating Procedure Press the 0 and 9 keys in this order in the initial stage of the
  • HP FAX-750 | Service Manual - Page 102
    3.5 Firmware Switch Setting and Printout [ A ] Firmware switch setting n 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
  • HP FAX-750 | Service Manual - Page 103
    -digit number is entered for double-digit firmware switch numbers, the equipment will automatically return to the initial stage of the maintenance mode. n Note The user-accessible selectors of the firmware switches are shaded in the tables given on the following pages. V - 10
  • HP FAX-750 | Service Manual - Page 104
    -digit pause Switching between pulse (DP) and tone (PB) dialing, by the function switch Default dialing mode, pulse (DP) or tone (PB) dialing Setting and Specifications No. 1 2 00 : 01 : 10 : 11 : No. 3 4 00 : 01 : 10 : 11 : No. 5 6 00 : 01 : 10 : 11 : N N+1 10-N N 60 ms 67 ms 40 ms (for 16 PPS
  • HP FAX-750 | Service Manual - Page 105
    which may be changed by the function switch. If the user switches it with the function switch when selector 7 is set in tone dialing Attenuator for pseudo ring backtone to the line (selectable in the range of 0-15 dB) Setting and Specifications No. 1 2 00 : 01 : 10 : 11 : No. 3 4 00 : 01 : 10 : 11
  • HP FAX-750 | Service Manual - Page 106
    with a telephone 6 Dial tone detection in PABX* 7 8 "R" key function Setting and Specifications 0: A 1: B No. 2 3 4 000: 001: 010: 011: 100: 101 by these selectors, the equipment interprets CNG as an effective signal and then starts FAX reception. Selector No. 1 No. 5 0 (A) 0 (A) 1 (B) 1
  • HP FAX-750 | Service Manual - Page 107
    l 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
  • HP FAX-750 | Service Manual - Page 108
    Break time length for flash function Setting and Specifications 0: Provided 1: Not provided No. 2 10 11 : 200 ms : 300 ms : 500 ms : 700 ms : 80 ms : 110 ms : 250 ms : 500 ms NOTE: Selectors in those countries where no transfer facility is supported. NOTE: Selectors 2 through 4 are applicable
  • HP FAX-750 | Service Manual - Page 109
    in automatic sending mode Busy tone detection in automatic receiving mode Not used. Setting and Specifications No. 1 2 3 000 001 010 011 100 101 110 111 : 3.5 sec. a line is connected. (However, in those countries which support no dial tone detection function, e.g., in the U.S.A., setting
  • HP FAX-750 | Service Manual - Page 110
    l 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
  • HP FAX-750 | Service Manual - Page 111
    WSW06 (Pause key setting and 2nd dial tone detection) Selector No. 1 | 3 4 | 6 7 8 Function Setting and Specifications Pause key setting and 2nd dial tone detection No. 1 2 3 0 0 0 : No pause 0 0 1 : 3.5 sec. WAIT 0 1 0 : 7 sec. where no dial tone detection is supported, e.g., U.S.A. V - 18
  • HP FAX-750 | Service Manual - Page 112
    activated by selectors 1 through 3 (Setting 1 0 1, 1 1 0, or 1 1 1). This function does not apply in those countries where no dial tone detection function is supported. l Selector 7: No. of 2nd dial tone detection times This selector sets the number of dial tone detection times required for starting
  • HP FAX-750 | Service Manual - Page 113
    level (Z = 600 Ω) 1st dial tone interrupt detecting time Not used. Setting and Specifications No. 1 2 00 01 1X : Narrows by 10 Hz : Initial value : Widens in those countries where no dial tone or line current detection is supported, e.g., U.S.A. l Selectors 1 and 2: Frequency band range These
  • HP FAX-750 | Service Manual - Page 114
    Detection level of 1st dial tone | and busy tone before dialing 8 Setting and Specifications No. 1 2 3 000: 001: 010: 011: 100: 101: 110: WSW08 is not applicable in those countries where no dial tone detection is supported, e.g., U.S.A. l Selectors 1 through 3: 1st dial tone detection time
  • HP FAX-750 | Service Manual - Page 115
    no response from the called station in automatic sending mode Setting and Specifications 0: 256 octets 1: 64 octets 0: Allowed 1: Prohibited No. in those models which do not support ECM. l Selector 1: Frame length use non-standard commands (the machine's nativemode commands, e.g., NSF,
  • HP FAX-750 | Service Manual - Page 116
    Selector No. 1 2 3 4 5 6 7 8 WSW10 (Protocol definition 2) Function Setting and Specifications Switching of DPS, following the CML ON/OFF Time length from transmission of the last dial digit to CML ON Time length from CML ON
  • HP FAX-750 | Service Manual - Page 117
    Not used. ON/OFF time length ranges (More than one setting allowed) Setting and Specifications No. 1 2 00 01 1x : Narrows by 10 Hz : Initial value : 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
  • HP FAX-750 | Service Manual - Page 118
    time length of calling signal (Ci) 4 5 Detecting time setting 6 7 Delay 8 Not used. Setting and Specifications No. 1 0 0 1 1 No. 3 0 0 1 1 No. 5 0 0 1 1 0: 2 0: 1: 0: 1: 4 0: 1: 0: 1: 6 0: 1: 0: 1: Yes 1500 ms 500 ms 700 ms 900 ms 6 sec. 7 sec. 9 sec. 11 sec. 800 ms (1000 ms*) 200 ms 250
  • HP FAX-750 | Service Manual - Page 119
    3 4 5 | 8 WSW13 (Modem setting) Function Cable equalizer Reception level Modem attenuator Setting and Specifications No. 1 2 00 : 01 : 10 : 11 : No. 3 4 00 : 01 dB 1: 1 dB The modem should be adjusted according to the user's line conditions. l Selectors 1 and 2: Cable equalizer These selectors
  • HP FAX-750 | Service Manual - Page 120
    Frequency band selection 4 (Upper limit) 5 | No. of rings in AUTO ANS mode 8 Setting and Specifications No. 1 2 00: 01: 10: 11: 13 Hz 15 Hz 23 Hz 20 Hz No. for activating the AUTO ANS facility. In the French versions, if the user sets the PBX to OFF from the control panel, the setting made
  • HP FAX-750 | Service Manual - Page 121
    of redial interval No. of redialings Redialing for no response sent from the called terminal Not used. Setting and Specifications No. 1 0 0 1 1 No. 3 0 0 0 0 1 2 0: 1: 0: 1: 45 00 00 01 01 | 11 5 minutes 1 minute 2 minutes 3 minutes 6 0 : 16 times 1 : 1 times 0 : 2 times 1 : 3 times | 1 : 15
  • HP FAX-750 | Service Manual - Page 122
    Selector No. 1 2 3 | 6 7 8 WSW16 (Function setting 1) Function Not used. CCITT superfine recommendation Setting and Specifications 0: OFF 1: ON Not used. Max. document length limitation Stop key pressed during reception 0: 400 cm 0: Not functional 1: 90 cm 1: Functional l Selector 2: CCITT
  • HP FAX-750 | Service Manual - Page 123
    clock/prompt alternate display Calendar clock type Error indication in activity report Non-ring reception Not used. Setting and Specifications No. 1 0 0 1 0: 2 0: 1: X: ON No alarm Always valid Valid except when 'call reservation' is selected. 1: OFF 0: NO 1: YES 0: U.S.A. type 0: NO 0: OFF
  • HP FAX-750 | Service Manual - Page 124
    . Detection enabled time for CNG and no tone Not used. Registration of station ID Tone sound monitoring Setting and Specifications No. 2 0 0 1 1 3 0: 1: 0: 1: 40 sec. 0 sec. 5 sec. 80 sec. (No detection) 0: No. 7 0 1 1 Permitted 1: Prohibited 8 X: 0: 1: No monitoring Up to phase B at the
  • HP FAX-750 | Service Manual - Page 125
    3 4 | Last transmission speed choice for fallback 6 7 Not used. 8 V. 17 mode Setting and Specifications No. 1 2 3 No. 4 5 6 000 : 001 : 010 : 011 : 100 : 9600 bps. NOTE: Selector 8 is applicable only to those models that support 14,400 bps. l Selectors 1 through 6: First and last choices
  • HP FAX-750 | Service Manual - Page 126
    These selectors should be used if the facsimile equipment malfunctions in overseas communications. According to the communications error state, select the signal specifications. Setting selector 2 to "1" allows the equipment to use 1100 Hz CED signal instead of 2100 Hz in receiving operation. This
  • HP FAX-750 | Service Manual - Page 127
    automatically shifts to the facsimile message receive mode or disconnects the line. l Selectors 6 and 7: Two-way recording These selectors select the specifications of the two-way recording feature. l Selector 8: Erasure of message Setting this selector to "0" will erase the message recorded in the
  • HP FAX-750 | Service Manual - Page 128
    Not used. 5 | 8 Acceptable TCF bit error rate (%) (Only at 4800 bps) Setting and Specifications 0: ON 0: ON 0: ON 1: OFF 1: OFF 1: OFF 0: 0% 0: 0% 0: 0% new call comes in. If Call Waiting Caller ID service is available in the area and the user subscribes to it, he/she can see information about
  • HP FAX-750 | Service Manual - Page 129
    transmission of RTN Issue of RTN at the occurrence of a pagination error Not used. Limitation of attenuation level Setting and Specifications 0: From the head of a series of zeros 1: From any arbitrary point No. 2 3 00: 01: 10: 11: 0% 0.5% 1% 2% No. 4 5 00: 01: 10: 11: 16% 14% 10% 8% 0: YES
  • HP FAX-750 | Service Manual - Page 130
    to start of pseudo ring backtone transmission Attenuator for playback of ICM/ OGM to the line (Selectable from the range of 015 dB) Setting and Specifications No. 1 2 00: 01: 10: 11: No. 3 4 00: 01: 10: 11: 0: 0 dB 0: 0 dB 0: 0 dB 0: 0 dB 15 sec. 20 sec. 30 sec. 50 sec. 4 sec. 3 sec. 2 sec
  • HP FAX-750 | Service Manual - Page 131
    Selector No. 1 | 4 5 | 7 8 WSW25 (TAD setting 3) Function Setting and Specifications Not used. Pause between paging number and PIN Not used. No. 5 6 7 000: 001: 010: 011: 100: 101: 110: 111: 2 sec. 4 sec. 6 sec. 8 sec. 10 sec.
  • HP FAX-750 | Service Manual - Page 132
    mode or via the facsimile equipment in F/T mode) 8 FAX reception after the time-out of pseudo ring backtones in F/T mode Setting and Specifications 0: OFF 0: ON 1: ON 1: OFF No. 4 is set up for the British Telecom's caller ID service or its equivalent. Selector 2 takes effect only when
  • HP FAX-750 | Service Manual - Page 133
    Ringer OFF setting Automatic playback of OGM at the start time of OGM ON mode Detection of distinctive ringing pattern Setting and Specifications 0: TEL key 1: TEL/POLLING key 0: Yes 1: No 0: No 1: Yes 0: Yes 1: No Not used. NOTE: Selector 1 is not applicable to the U.S.A. versions. NOTE
  • HP FAX-750 | Service Manual - Page 134
    setting 6) Function Transmission level of DTMF highband frequency signal Transmission level of DTMF low-band frequency signal Not used. Setting and Specifications No. 1 2 3 000 : 001 : 010 : 011 : 100 : 101 : 110 : 111 : No. 4 5 6 000 : 001 : 010 : 011 : 100 : 101 : 110 : 111 : 0 dB +1 dB +2 dB
  • HP FAX-750 | Service Manual - Page 135
    built-in TAD operation Automatic dialing by caller IDs stored in the memory Prompt beep for activity report Setting and Specifications No. 1 2 3 000 : 001 : 010 : 011 : 100 : 101 : 110 : 111 memory can be called up on the LCD by the user function 67 and then pressing the Start key when the desired
  • HP FAX-750 | Service Manual - Page 136
    No. 1 | 3 4 | 6 7 8 WSW30 (Function setting 8) Function Detection level of dial tone or busy tone for the built-in TAD operation Setting and Specifications No. 1 2 3 000 : 001 : 010 : 011 : 100 : 101 : 110 : 111 : -38.0 dBm (A) -39.5 dBm (B) -41.0 dBm (C) -42.5 dBm (D) -44.0 dBm (E) -45.5 dBm
  • HP FAX-750 | Service Manual - Page 137
    Not used. Minimum short-OFF duration in distinctive ringing Setting and Specifications 0: 100% 1: 50% 0: 130 ms 1: 90 ms Not Selector 5 is applicable in those areas where the distinctive ringing is supported. l Selector 2: Default reduction rate for failure of automatic reduction during
  • HP FAX-750 | Service Manual - Page 138
    Selector No. 1 | 4 5 6 7 8 WSW32 (Function setting 10) Function Setting and Specifications Not used. Default resolution Default contrast No. 5 6 00: 01: 10: 11: No. 7 8 0 X: 10: 11: Standard Fine Super fine Photo Automatic Super light Super dark l Selectors 5
  • HP FAX-750 | Service Manual - Page 139
    via the telephone line in the built-in TAD operation FAX receiving speed to be kept within the transmission speed limit to the PC Report output of polled transmission requests Comfortable noise level Setting and Specifications No. 1 2 3 0 0 0 : -42.5 dBm (A) 0 0 1 : -44.0 dBm (B) 0 1 0 : -45.5 dBm
  • HP FAX-750 | Service Manual - Page 140
    Selector No. 1 | 3 4 5 6 7 8 WSW34 (Function setting 12) Function Setting and Specifications Erasing time length of ICM tone recorded preceding the tone detection starting point in the case of automatic line disconnection due to no voice signal
  • HP FAX-750 | Service Manual - Page 141
    Selector No. 1 | 5 6 | 8 WSW36 (Function setting 14) Function Setting and Specifications Not used. Lower limit of frequency to be ignored after detection of calling signals (Ci sounding (until the equipment starts automatic reception of FAX data if in the FAX mode or enters the TAD mode if set in
  • HP FAX-750 | Service Manual - Page 142
    [ B ] Printout of firmware switch data n Function The equipment prints out the setting items and contents specified by the firmware switches. n 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
  • HP FAX-750 | Service Manual - Page 143
    3.6 Operational Check of LCD n Function This function allows you to check whether the LCD on the control panel works normally. n 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. Each time you press the
  • HP FAX-750 | Service Manual - Page 144
    FAX750/FAX770/FAX-910/FAX-920/FAX-921/MFC-925 FAX870MC/FAX-930/FAX-931/MFC970MC Key & Button Entry Order V - 51
  • HP FAX-750 | Service Manual - Page 145
    sensor, ribbon sensor, and hook switch sensor*) operate correctly. (*In the FAX-910, the hook switch sensor serves no function.) n Operating Procedure (1) Press jam. Recording paper loaded or paper front cover opened. Ribbon cartridge loaded. On-hook state. (2) Change the detecting conditions and
  • HP FAX-750 | Service Manual - Page 146
    3.9 Fine Adjustment of Scanning Start/End Position n Function This function allows you to adjust the scanning start/end position. n 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
  • HP FAX-750 | Service Manual - Page 147
    3.10 CIS Scanner Area Setting n Function The equipment sets the CIS scanner area and stores it into the EEPROM. n 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
  • HP FAX-750 | Service Manual - Page 148
    transmission-related problem, call the user's equipment at a remote location from your equipment. (2) If the line is connected, have the user perform the following: 1) For FAX750/FAX770/FAX870MC/MFC970MC: Press the Function, Mode, and 0 keys in this order. For FAX-910/FAX-920/FAX-921/FAX-930/FAX-931
  • HP FAX-750 | Service Manual - Page 149
    READY" appears on the LCD. (2) For FAX750/FAX770/FAX870MC/MFC970MC: Press the Function key. For FAX-910/FAX-920/FAX-921/FAX-930/FAX-931/MFC-925: Press the Menu key. paper as shown below. If any error occurs during counting, the message "MACHINE ERROR AB" appears on the LCD, with no copying of the TC-
  • HP FAX-750 | Service Manual - Page 150
    CHAPTER VI. ERROR INDICATION AND TROUBLESHOOTING
  • HP FAX-750 | Service Manual - Page 151
    LCD VI-1 [ 2 ] Error codes shown in the "MACHINE ERROR _ _" message VI-3 1.2 Communications Errors VI-5 2. TROUBLESHOOTING VI-12 2.1 Introduction ...VI-12 2.2 Precautions ...VI-12 2.3 Checking prior to Troubleshooting VI-12 2.4 Troubleshooting Procedures VI-13 [ 1 ] Control panel related VI
  • HP FAX-750 | Service Manual - Page 152
    ERROR INDICATION To help the user or the service personnel promptly locate the cause of a problem (if any), the facsimile . For the error messages, see [ 1 ] below. As one of the error messages, "MACHINE ERROR _ _" includes an error code which indicates the detailed error causes listed in [ 2 ].
  • HP FAX-750 | Service Manual - Page 153
    LCD DOCUMENT JAM CLEAN UP SCANNER SCANNER ERROR PRINTER FAULT CHANGE CARTRIDGE MACHINE ERROR _ _ or MACHINE ERR _ _ _ _ PC BUSY OR FAIL Probable in the recording head caused a heat error. The ribbon sensor detects that no ink ribbon is loaded. "_ _" indicates an error code. Refer to Section [ 2
  • HP FAX-750 | Service Manual - Page 154
    [ 2 ] Error codes shown in the "MACHINE ERROR _ _" message Error Code (Hex.) ( 85 ( 87 8A ( 8B ( A1 ( A2 ( A4 ( A5 ( A6 ( A7 ( A8 ( AB ( AC ( B9 ( BE ( BF ( D5 ( D6 E6 ( E8 F3 ( F5 ( F6 Error factor Ink ribbon empty. ) Fails to complete the sequence of recording operation. ) Wrong or weak
  • HP FAX-750 | Service Manual - Page 155
    "DOCUMENT JAM" and "CHECK PAPER" error.) NOTE: Four-digit error codes listed above are preceded by MACHINE ERR instead of MACHINE ERROR. Error codes in parentheses do not appear in the "MACHINE ERR _ _ _ _," since those errors are displayed as messages described in "[ 1 ] Error messages on the LCD
  • HP FAX-750 | Service Manual - Page 156
    1.2 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 -
  • HP FAX-750 | Service Manual - Page 157
    n Definition of Error Codes on the Communications List (1) Calling Code 1 10 11 11 11 11 11 11 11 Code 2 08 01 02 03 05 06 07 10 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.*
  • HP FAX-750 | Service Manual - Page 158
    terminal. 32 14 The available memory space of the remote terminal is less than that required for reception of the confidential or relay broad-casting instruction. VI - 7
  • HP FAX-750 | Service Manual - Page 159
    (4) Instructions received from the remote terminal [checking the NSC, DTC, NSS, and DCS] Code 1 40 40 Code 2 02 03 Causes Illegal coding system requested. Illegal recording
  • HP FAX-750 | Service Manual - Page 160
    (6) ID checking Code 1 63 63 63 63 63 63 Code 2 01 02 03 04 05 06 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.
  • HP FAX-750 | Service Manual - Page 161
    (9) Signal isolation Code 1 90 Code 2 01 90 02 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 A0 Code 2 03 A0 11 A0 12 A0 13 A0 14 A0 15 A0
  • HP FAX-750 | Service Manual - Page 162
    (12) Maintenance mode Code 1 E0 E0 E0 Code 2 01 02 03 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 burnin operation. (13) Equipment error Code 1 FF Code 2 X X Causes
  • HP FAX-750 | Service Manual - Page 163
    the troubleshooting procedures, so this section covers some sample problems. However, those samples will help service personnel pinpoint and repair other defective elements if he/she analyzes and examines them well. 2.2 Precautions Be sure to observe the following to prevent the secondary troubles
  • HP FAX-750 | Service Manual - Page 164
    2.4 Troubleshooting Procedures [ 1 ] Control panel related Trouble (1) LCD shows nothing. (2) Control panel inoperative. power supply PCB • Control panel PCB • FPC key • Main PCB [ 2 ] Telephone related Trouble (1) No phone call can be made. (2) Speed dialing or one-touch dialing will not work.
  • HP FAX-750 | Service Manual - Page 165
    (1) No tone is transmitted. • Main PCB • NCU PCB Check: [ 4 ] Paper/document feeding related Trouble (1) Neither "COPY: PRESS COPY" nor "FAX: NO. & START" message appears although documents are set. (2) Document not fed. (3) Recording paper not fed. (4) Document double feeding Check: • Sensors
  • HP FAX-750 | Service Manual - Page 166
    , 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 (1) Completely blank At the scanner At the recorder (2) White vertical streaks At the scanner At the recorder
  • HP FAX-750 | Service Manual - Page 167
    beneath the recording head • Platen and its related gears • Solenoid and the planetary gear train • Drive motor and its harness • Main PCB [ 6 ] Others Trouble (1) When you turn the power ON, the beeper sounds. Check: • Main PCB TIP: The beeper sounds with one of the following three beep codes
  • HP FAX-750 | Service Manual - Page 168
    July '98 5X4401 Printed in Japan
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 170
    is given on the next page. n Operating Procedure (1) FAX750/FAX770/FAX860/FAX870MC/FAX880/FAX1270T/MFC970MC/MFC1970MCT: Within 2 seconds this order to make the equipment enter the maintenance mode. FAX-910/FAX-917/FAX-920/FAX-921/FAX-930/FAX-931/FAX-940/MFC-925: Within 2 seconds Press the Menu, *,
  • HP FAX-750 | Service Manual - Page 171
    Codes List Versions U.S.A. U.S.A. (w/ letter Z) U.S.A. (w/ letter Y) CANADA CANADA(w/ Z) ASIA CHINA GULF HONG KONG THAILAND INDONESIA INDIA RUSSIA BRAZIL MEXICO SOUTH AMERICA FAX750 1001 3001 0002 2002 0001 0001 FAX770 1101 3101 9101 0102 2102 0040 0101 0040 0101 0040 0045 0101 0101 0035 0035
  • HP FAX-750 | Service Manual - Page 172
    DENMARK AUSTRIA SPAIN ITALY ISRAEL PORTUGAL SWEDEN NEW ZEALAND EURO GENERIC FAX-910 0003 0010 FAX-920/921/ 917 0003 0004 0005 0006 0007 0008 0009 0010 0006 0007 0008 0009 0010 0011 0012 0013 0014 0015 0016 0004 0018 0026 0027 FAX-930/931/ 940 0003 0004 0005 0006 0007 0008 0009 0010 0011 0012 0013
  • HP FAX-750 | Service Manual - 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
  • HP FAX-750 | Service Manual - Page 174
    3 144 V OL 3 ( OD) 117 C5 118 C5 MU T C7 8 MU T E 3 5 F , 4 3 C CML H 119 C ML T BUS 4 8 B 4 3A TELL 120 TEL 106 ME X T L GND 4 6 D RNGL 4 5 E RNGO 43E PL S 4 2 E GND GND F GND GND GND Main PCB 1/5 A (FAX750/FAX770/FAX-910/ FAX-920/FAX-921/MFC-925) 1 2 3 4 5 6 7 8
  • HP FAX-750 | Service Manual - Page 175
    25 D5 A5 DQ6 A6 18 26 D6 A6 DQ7 A7 19 27 D7 A7 DQ8 A8 20 A8 A9 9 A9 1 6 D ABAS E 1 6 C DBAS F Main PCB 2/5 A (FAX750/FAX770/FAX-910/ FAX-920/FAX-921/MFC-925) 5 6 7 8
  • HP FAX-750 | Service Manual - Page 176
    B- PH GND L ATC 1 5 D HRL Y 3 4 E 1 2 3 3 2 F HRL Y 4 2 E C ML L 6 1 4 3 2 GND #4 U MG5 N P WO N 1 5 B C ML H 1 2 D 4 5 6 7 8 A +5V 1 5 B FSEN 1 5 B RSEN R8 4 100K R8 3 100K * GND P8 B2 B- PH RED GND F Main PCB 3/5 A (FAX750/FAX770/FAX-910/ FAX-920/FAX-921/MFC-925) 7 8
  • HP FAX-750 | Service Manual - Page 177
  • HP FAX-750 | Service Manual - Page 178
  • HP FAX-750 | Service Manual - Page 179
    VOL 1 83 S OL ( OD) 171 BSRQ 41E EAT 82 P WO N 172 WA I T 3 5 F , 4 2 B CML H 187 C ML 173 RF SH 4 1 E RDPS 188 DPS 174 M1 42E PL S 189 PL S 4 3A TELL 191 TEL 136 A0 A0 C 23 3 C3 * C5 E0 V E0 V GND GND FG A (FAX870MC/MFC970MC/FAX-930/ FAX-931) 1 2 3 4 5 6 7 8
  • HP FAX-750 | Service Manual - Page 180
    1 R4 1/ 2W 1 P0 V 1 4 D DABUS E E 1 4 E DBAS P0 V S OL +25V 1 D1 1 SS1 2 0 Q1 0 DT D1 1 3 Z K 2 S OL 16D P5 B2 B- PH BL UE F F GND Main PCB 2/6 A (FAX870MC/MFC970MC/FAX-930/ FAX-931) 1 2 3 4 5 6 7 8
  • HP FAX-750 | Service Manual - Page 181
    HDC 1 2 D ST 1 12D C7 6 * C7 5 CC1 0 1 GN D 3 1 P1 1 F B1 0 B- PH GN D LATC 16 D HRL Y 3 4 E 1 2 3 3 2 F HRL Y 4 2 E C ML L 6 1 4 3 2 GND #7 U MG5 N P WO N 1 6 D C ML H 1 6 C 4 5 6 R4 9 4. 7K L16 L102B H OOK 1 6 C HOOK 1 E 2 C4 5 * GND P9 B2 B- PH RED GND F Main PCB
  • HP FAX-750 | Service Manual - Page 182
  • HP FAX-750 | Service Manual - Page 183
    0 4 16 4 RXI NB VSS C1 0 1 6 V1 0 C1 8 CC1 0 4 2 VBI AS HREF 14 VSS MOV +5V M0 V 8 #18 BA1 0 3 5 8 F C2 9 CC1 0 4 4 F F M0 V Main PCB 5/6 A (FAX870MC/MFC970MC/FAX-930/ FAX-931) 1 2 3 4 5 6 7 8
  • HP FAX-750 | Service Manual - Page 184
  • HP FAX-750 | Service Manual - Page 185
    1 3 4 S0 V T E L OF F S0 V +5V C E B S0 V 3 4 5 C ML T EL RL 4 S0 V 5 4 5 1 2 RL 2 C9 REF 4 CI REF S0 V 3 REF ML +26V +5V S0 V +26V C2 +5V S0 V C P1 6 0 3 3 B- 1 2 Z D D 3 . C OMP ON E N T S I N P A R E N T H E S I S N OT T O B E MOU N T E D . NCU B (FAX750/FAX770/FAX
  • HP FAX-750 | Service Manual - Page 186
    2 1 3 4 S0 V T E L OF F S0 V +5V C E B S0 V 3 4 5 6 C ML T EL RL 4 S0 V 5 4 5 1 2 RL 2 C9 REF 4 CI REF S0 V 3 REF 531 642 42 FG S0 V ( CORDL E S S ) TEL SL T EL RL PL S T E L OF F CI B RL 2 C ML +5V 8 or BA1 0 3 5 8 4 +26V +5V S0 V +26V C2 +5V S0 V S0 V C P1 6 0
  • HP FAX-750 | Service Manual - Page 187
    R2 0 0 PN L7 X2 ( ) ( ) 3 RDPS * 4 +5V 4 11 S0 V * ( ) ( ) 1 J P4 ( C) 3 + - 4 1 6 4 +5V ) 5 REF Z D2 4 . 3 VX2 Z D1 6 9 A J W7 ( 5 ) C ML 8 T E L OF F 2 REF S0 V RL 1 6 J P1 ( C) PL S 3 DAST 17 RDPS 13 ) ( 3 4 3 1 3 2 S0 V 1 EART H +5V 2 S0 V 6 4 DAST J W1 3 ( 10
  • HP FAX-750 | Service Manual - Page 188
    1 2 3 4 5 6 A A UG6 7 1 1 - 0 X X ASSY UG6 7 1 2 - 0 X X ASSY ASSY I TEM PH3 - - T L P 6 2 0 GR T L P 6 2 0 GR - - - - L1 RCH8 5 5 - 3 3 2 K RCH8 5 5 - 3 3 2 K 5 mm J U MP E R 5 mm J U MP E R 5 mm J U MP E R 5 mm J U MP E R 5 mm J U MP E R 5 mm J U MP E R C8 - - PC2
  • HP FAX-750 | Service Manual - Page 189
    V J P4 ( C) + - 4 3 4 3 1 3 5 6 SP1 REF Z D2 ) ( ) Z D1 ( 1 6 3 4 1 +5V 2 S0 V 1 EART H +5V 2 S0 V 6 4 DAST J W1 3 ( 10) REF REF SP5 9 A J W7 ( 5 ) C ML 8 T E L OF F 2 REF S0 V RL 1 6 J P1 ( C) PL S 3 DAST 17 RDPS 13 ) ) ( ( REF A - OUT J W5 ( 10) +5V EART H 14
  • HP FAX-750 | Service Manual - Page 190
    1 2 3 4 5 A UG6 7 1 5 - 0 X X ASSY ASSY I TEM PH3 - - - - - - - T L P 6 2 0 GR SP2 ASSY ASSY ASSY - - - ASSY ASSY SP4 ASSY ASSY ASSY - - - ASSY ASSY SP6 ASSY ASSY - - - - ASSY ASSY SP7 - - - ASSY - - - - SP9 ASSY - - ASSY - ASSY ASSY ASSY
  • HP FAX-750 | Service Manual - Page 191
    1 3 5 6 SP1 REF Z D2 ) Z D1 ( 1 6 3 4 1 +5V 2 S0 V 1 EART H +5V 2 S0 V 6 4 DAST J W1 3 ( 10) REF REF () SP5 9 A J W7 ( 5 ) C ML 8 T E L OF F 2 REF S0 V RL 1 6 J P1 ( C) PL S 3 DAST 17 RDPS 13 ) () ( () R1 3 0 REF A - OUT J W5 ( 10) +5V EART H 14 B J W2 0 ( 5 ) ADL
  • HP FAX-750 | Service Manual - Page 192
    0 PN L7 X2 ( )( ) ( ) ( ) ( ) 4 RDPS () ( )( ) +5V 4 11 S0 V 1 J P4 ( C) 3 + - 4 1 5 SP1 ( ) 6 4 +5V ( ) () ( ) REF Z D2 Z D1 SP5 ( ) 6 9 A J W7 ( 5 ) C ML 8 T E L OF F 2 REF S0 V RL 1 6 J P1 ( C) PL S 3 DAST 17 RDPS 13 3 2 EART H EART H 14 B 4 (3 S0
  • HP FAX-750 | Service Manual - Page 193
    P O0 2 C7 C N. C C1 GND +5V N. C 3 GND 1 F RNT J W2 0 J W3 0 J W1 0 J W4 0 J W5 0 J W6 0 GND +5V +5V F RNT D 1A C3 2K E4 GND GND Control Panel 1/2 C (FAX750/FAX770/FAX-910/FAX-920/ FAX-921/MFC-925) 2 3 4 5 6
  • HP FAX-750 | Service Manual - Page 194
    2 P K I 1 1 4 1 6 1 7 3 0 3 1 3 3 S W1 P1 - 1 0 P K I 2 1 0 1 1 1 2 1 3 3 2 3 4 S W2 P1 - 8 P KI 3 6 7 8 9 2 6 2 8 S W3 C P1 - 6 P KI 4 1 8 1 5 4 25 27 29 23 P1 - 4 P KI 5 1 2 3 5 P1 - 2 P 24 22 D Control Panel 2/2 C (FAX750/FAX770/FAX-910/FAX-920/ FAX-921/MFC-925) 4 5 6
  • HP FAX-750 | Service Manual - Page 195
    40 GND 44 P O3 1 P O2 2 P O1 3 P O0 +5V 470 x2 +5V GND L ED1 BR2 2 7 2 S F RNT 1A C3 D D 2K E4 GND GND Control Panel 1/2 C (FAX870MC/MFC970MC/FAX-930/ FAX-931) 1 2 3 4 5 6
  • HP FAX-750 | Service Manual - Page 196
    S W4 P1 - 1 2 P K I 1 1 4 1 6 1 7 3 0 3 1 3 3 S W1 P1 - 1 0 P K I 2 1 0 1 1 1 2 1 3 3 2 3 4 S W2 P1 - 8 P KI 3 6 7 8 9 2 6 2 8 S W3 C P1 - 6 P KI 4 1 8 1 5 4 25 27 29 23 P1 - 4 P KI 5 1 2 3 5 P1 - 2 P 24 22 D Control Panel 2/2 C (FAX870MC/MFC970MC/FAX-930/ FAX-931) 4 5 6
  • HP FAX-750 | Service Manual - Page 197
  • HP FAX-750 | Service Manual - Page 198
  • HP FAX-750 | Service Manual - 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 /
  • HP FAX-750 | Service Manual - 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.
  • HP FAX-750 | Service Manual - 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] (1) (2) (3) REF.NO. CODE Q' TY DESCRIPTION REMARKS 2. Parts
  • HP FAX-750 | Service Manual - Page 202
  • HP FAX-750 | Service Manual - Page 203
    /IRE/FIN/DEN/AUS/ISR/SWE/CZE/GNR 1 MAIN FRAME, WHITE(1397), FAX-920/FAX-930 FOR ARL/NZ 1 MAIN FRAME, WHITE(1138), FAX-920 FOR UK, FAX-921/FAX-931/MFC-925/MFC-970MC 1 SPEAKER 1 PC I/F MODULAR HARNESS 1 HANDSET MOUNT, GRAY(1395), FAX-920/930/940 FOR GER/UK/FRA/NOR/CHE/IRE/FIN/DEN
  • HP FAX-750 | Service Manual - Page 204
    PLATE 1 BOTTOM PLATE 1 INSULATION SHEET 1 SPEAKER SUPPORT SPRING 2 RUBBER FOOT 7 TAPTITE, CUP B M3X8 1 TAPTITE, CUP B M3X8 1 RIBBON SHAFT STOPPER 1 RIBBON SHAFT STOPPER SPRING 1 HARNESS GUIDE FILM 1 RECORDING PAPER COVER ASSY, GRAY(1395), FAX-910/920/930/940 FOR GER/UK/FRA
  • HP FAX-750 | Service Manual - Page 205
    CONTROL PANEL, WHITE(1138), FAX-931 FOR NLD 1 CONTROL PANEL, WHITE(1138), FAX-931 FOR SPA 1 CONTROL PANEL, WHITE(1138), FAX-931 FOR ITA 1 CONTROL PANEL, GRAY(1395), FAX-940 FOR GER 1 CONTROL PANEL, GRAY(1395), FAX-940 FOR UK/CHE FAX-910,FAX-920,FAX-921,FAX-930,FAX-931,FAX-940,MFC-925,MFC-970MC
  • HP FAX-750 | Service Manual - Page 206
    AUS/ISR/SWE/CZE/GNR 3 KEY,FUNCTION, GRAY(1395), FAX-940 1 KEY,FUNCTION, BLUE(6155), FAX-940 4 KEY,FUNCTION, WHITE(1397), FAX-920/930 FOR ARL/NZ 4 KEY,FUNCTION, WHITE(1138), FAX-921/931/MFC-925/970MC FAX-920 FOR UK REMARKS FAX-910,FAX-920,FAX-921,FAX-930,FAX-931,FAX-940,MFC-925,MFC-970MC/Ver.P
  • HP FAX-750 | Service Manual - Page 207
    /FIN/DEN/AUS/SWE/CZE/GNR 1 FLASH KEY SUPPORT FOR FAX-930/931/940/MFC-970MC 1 KEY,MC MODE FOR FAX-930/931/940/MFC-970MC 1 ANTI STATIC BRUSH 1 PRESSURE BAR SUPPORT 1 WHITE FILM 1 PANEL-MAIN HARNESS FOR FAX-910/920/921/MFC-925 1 PANEL-MAIN HARNESS FOR FAX-920 FOR ARL 1 PANEL-MAIN HARNESS FOR
  • HP FAX-750 | Service Manual - Page 208
    FOR FIN 1 TELEPHONE LINE CORD, FAX-920/MFC-925 FOR DEN 1 TELEPHONE LINE CORD, FAX-930 FOR DEN 1 TELEPHONE LINE CORD, FAX-920/930 FOR AUS 1 TELEPHONE LINE CORD, FAX-921 FOR ITA 1 TELEPHONE LINE CORD, FAX-931 FOR ITA REMARKS FAX-910,FAX-920,FAX-921,FAX-930,FAX-931,FAX-940,MFC-925,MFC-970MC/Ver
  • HP FAX-750 | Service Manual - Page 209
    -910 FOR GER (INCLUDING OPERATIONS MANUAL FAX910(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)) REMARKS FAX-910,FAX-920,FAX-921,FAX-930,FAX-931,FAX-940,MFC-925,MFC-970MC
  • HP FAX-750 | Service Manual - Page 210
    CARD EUR, DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) 1 USER'S MANUAL ASSY FAX-940 FOR GER, (INCLUDING OPERATIONS MANUAL FAX-940 (REF.NO.81-1) E-MAIL MANUAL, WARRANTY CARD EUR, DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO
  • HP FAX-750 | Service Manual - Page 211
    DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) 1 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
  • HP FAX-750 | Service Manual - Page 212
    WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) 1 USER'S MANUAL ASSY FAX-940 FOR CHE, (INCLUDING OPERATIONS MANUAL FAX-940 FOR CHE, OPERATIONS MANUAL FAX-940 FOR BEL/CHE (REF.NO.81-1), E-MAIL MANUAL FOR GER/CHE, E-MAIL MANUAL FOR FRA/CHE, WARRANTY CARD
  • HP FAX-750 | Service Manual - Page 213
    WIRE EXTENSION(REF.NO.73), PAPER WIRE EXTENSION(REF.NO.74), PAPER SUPPORT(REF.NO.75)) 1 OWNER'S MANUAL ASSY, FAX-920/930 FOR NZ (INCLUDING OPERATIONS MANUAL FAX-920/930/MFC-925 FOR NZ(REF.NO.81-1), QUICK REFERENCE GUIDE FOR ARL/NZ (REF.NO.81-2), DOCUMENT WIRE EXTENSION(REF.NO.73), PAPER
  • HP FAX-750 | Service Manual - Page 214
    930/MFC-925 FOR DEN 1 OPERATIONS MANUAL, FAX-921/931 FOR SPA 1 OPERATIONS MANUAL, FAX-921/931 FOR ITA 1 OPERATIONS MANUAL, FAX-920 FOR ISR 1 OPERATIONS MANUAL, FAX-920/930/MFC925 FOR SWE 1 OPERATIONS MANUAL, FAX-920/930/MFC-970MC FOR NZ 1 QUICK REFERENCE GUIDE FOR ARL/NZ 1 MULTI FUNCTION LINK
  • HP FAX-750 | Service Manual - Page 215
    FAX-940 FOR UK/CHE 1 CARTON, BROTHER FAX-940 FOR FRA 1 CARTON, BROTHER MFC-970MC FOR ARL/NZ 1 STYROFORM, MFC-925, FAX-920/930/MFC-970MC FOR ARL/NZ 1 STYROFORM, FAX-910/920/921/930/931/940, MFC970MC 1 BAG, 570X650H 1 BAG, 570X650H, ONLY FOR FRA 1 CARTON FOR ACCESSORIES, MFC-925 2 PAPER GUIDE
  • HP FAX-750 | Service Manual - Page 216
  • HP FAX-750 | Service Manual - Page 217
    1 LOCK LEVER SPRING, R 1 PRESSURE PLATE RELEASE CAM 1 PLATEN FRAME 1 FRONT COVER SENSING ACTUATOR 1 RETAINING RING, E5 1 SPRING WASHER 1 MAIN-SENSOR HARNESS 1 HARNESS GUIDE NOT USED 2 RUBBER FOOT REMARKS FAX-910,FAX-920,FAX-921,FAX-930,FAX-931,FAX-940,MFC-925,MFC-970MC/Ver.B
  • HP FAX-750 | Service Manual - Page 218
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
FACSIMILE EQUIPMENT
SERVICE MANUAL
MODEL: FAX750/FAX770/FAX870MC
FAX-910/FAX-920/FAX-921/FAX-930/FAX-931
MFC-925/MFC970MC