Page 1: Service Manual
FACSIMILE EQUIPMENT SERVICE MANUAL MODELS: MFC820CW MFC640CW DCP340CW Confidential...
Page 2 © Copyright Brother 2005 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. Confidential...
Page 3: How This Manual Is Organized
Preface This Service Manual is intended for use by service personnel and details the specifications, construction, theory of operation, and maintenance for the Brother machines noted on the front cover. It includes information required for troubleshooting and service--disassembly, reassembly, and lubrication--so that service personnel will be able to understand equipment function, repair the equipment in a timely manner and order spare parts as necessary.
Page 4 Customizing codes customize firmware for individual models, enabling the common firmware to be used for various models. They come with the firmware data provided by Brother Industries. Appendix 4...
Page 5 This appendix views a sample of the event log file. Selecting Start | Program | Brother | MFL-Pro Suite model name | Installation Diagnostics reads out the event log file. This manual describes the models and their versions destined for major countries. The specifications and functions are subject to change depending upon each destination.
Page 6: Safety Precautions
SAFETY PRECAUTIONS To use the machine safely Please refer to these instructions for later reference and before attempting any maintenance. WARNING There are high voltage electrodes inside the Do not handle the plug with wet hands. Doing machine. Before you clean the machine, this might cause an electrical shock.
Page 7 WARNING Use caution when installing or modifying telephone lines. Never touch telephone wires or terminals that are not insulated unless the telephone line has been disconnected at the wall jack. Never install telephone wiring during a lightning storm. Never install a telephone wall jack in a wet location. This product must be installed near an AC power outlet that is easily accessible.
Page 8 Choosing a location Place your MFC on a flat, stable surface that is free of vibration and shocks, such as a desk. Put the MFC near a telephone wall jack and a standard, grounded AC power outlet. Choose a location where the temperature remains between 50°F and 95°F (10°C and 35°C).
Page 9 CHAPTER PARTS NAMES & FUNCTIONS Confidential...
Page 10 CHAPTER 1 PARTS NAMES & FUNCTIONS This chapter contains external views and names of components and describes their functions. Information about the keys on the control panel is included to help you check operation or make adjustments. CONTENTS OUTLINE ........................1-1 CONTROL PANEL....................1-3 COMPONENTS .......................1-9 Confidential...
Page 11: Outline
1.1 OUTLINE Front view (6) ADF & document cover ASSY (1) Control panel (5) Scanner cover (Scanner unit) (2) Paper tray (4) External telephone line jack (3) Telephone line jack Rear view (8) LAN cable connector (9) Jam clear cove r (7) USB interface connector Confidential 1- 1...
Page 12: Control Panel
Name Description Use the keys to operate the machine. The liquid crystal display Control panel (LCD) shows the machine operation status. Load paper here. Paper will be fed into the machine, sheet by Paper tray sheet. Telephone line jack Plug in the modular plug on the telephone line here. External telephone line jack Plug in the modular plug on the external telephone line here.
Page 13 1.2 CONTROL PANEL MFC820CW 1. Dial Pad 3. Ink Use these keys to dial telephone and fax numbers and Lets you clean the print head, check the print quality, as a keyboard for entering information into the and check the available ink volume. machine.
Page 14 5. Menu keys 6. Start keys Volume keys Color Start Lets you start sending faxes or making copies in full In Fax mode, you can press these keys to adjust the volume. color. Also lets you start a scanning operation (in color or black &...
Page 15 MFC640CW 1. Message Center keys 3. Ink MC On/Off Lets you clean the print head, check the print quality, and check the available ink volume. Lets you activate the Message Center and will blink if you have new messages. 4. Dial Pad Play/Record Lets you listen to voice messages stored in memory.
Page 16 6. Copy Options 11. On/Off You can quickly and easily select temporary settings You can turn the machine on or off. for copying. 7. Fax Resolution 12. Navigation keys Adjusts the resolution when you send a fax. Menu/Set The same key is used for Menu and Set operations. Lets you access the Menu to program and store your 8.
Page 17 DCP340CW 1. Copy keys (Temporary settings) 3. Stop/Exit Copy Options You can quickly and easily select temporary settings Stops an operation or exits from the menu. for copying. 4. Mono Start Enlarge/Reduce Lets you enlarge or reduce copies depending on the ratio you select.
Page 18 7. Ink Management 10. Liquid Crystal Display (LCD) Displays messages on the screen to help you set up and use your machine. Lets you clean the print head, check the print quality, and check the available ink volume. The LCD examples in this guide are for models with a one-line display.
Page 19 Head/carriage unit Maintenance unit Upper cover Engine unit Ink refill ASSY Ink absorber box Main PCB ASSY WLAN PCB Lower cover Paper tray Hook switch PCB* Handset mount* MJ/PS shield MJ PCB* Handset* Power supply MFC820CW MFC640CW MFC820CW/640CW Confidential 1- 9...
Page 20: Specifications
CHAPTER SPECIFICATIONS Confidential...
Page 21 CHAPTER 2 SPECIFICATIONS This chapter lists the specifications of each model, which enables you to make a comparison of different models. CONTENTS GENERAL .......................2-1 2.1.1 General Specifications...................2-1 2.1.2 Paper Specifications..................2-3 2.1.3 Printable Area....................2-6 SPECIFICATIONS LIST....................2-7 Confidential...
Page 22: General
Best Print Quality 100 to 120 VAC, 50/60 Hz (U.S.A./Canada) Power Source 230 VAC, 50/60 Hz (Europe/Asia) Power Consumption MFC640CW U.S.A./Canadian models: Minimum: under 3.5 W Standby: 9.5 W or less (25°C) Peak: 27 W or less Minimum: under 4.0 W MFC640CW European/Asian models: Standby: 9.5 W or less (25°C)
Page 23 13.7" (347 mm) 6.5" 6.9" (165 mm) (174 mm) MFC640CW 17.3 x 13.7 x 6.5 inches (438 x 347 x 165 mm) 17.3 x 17.8 x 6.9 inches (440 x 453 x 174 mm) (with paper tray and document stopper opened) 17.8"...
Page 24 2.1.2 Paper Specifications Recommended Paper Brother Paper Paper Type Item Paper Type Item Letter Plain BP60PL A4 Plain BP60PA Letter Glossy BP60GLL A4 Glossy BP60GLA Letter Inkjet (Photo Matte) BP60ML A4 Inkjet (Photo Matte) BP60MA Transparencies: 3M Transparency Film Paper Type and Size for Each Operation...
Page 25 Paper Weight, Thickness and Capacity Paper Type Weight Thickness No. of sheets Cut Sheet Plain Paper 17 to 32 lb 0.003" to 0.006" (64 to 120 g/m (0.08 to 0.15 mm) Inkjet Paper 17 to 53 lb 0.003" to 0.01" (64 to 200 g/m (0.08 to 0.25 mm) Glossy Paper...
Page 26 Do not use paper or envelopes: that are damaged, curled, wrinkled, or irregularly shaped 0.08 in. (2 mm) or longer 0.08 in. (2 mm) or longer that are extremely shiny or highly textured that were previously printed by a printer that cannot be arranged uniformly when stacked that are made with a short grain Do not use envelopes:...
Page 27: Printable Area
2.1.3 Printable Area The printable area depends on the settings in the application you are using. The figures below show the unprintable areas on cut sheet paper and envelopes. Cut Sheet Paper Envelopes unprintable area Paper (1) Top (2) Bottom (3) Left (4) Right 0.12 in.
Page 28: Specifications List
100 (80 g/m2) 100 (80 g/m2) 100 (80 g/m2) 100 (80 g/m2) 100 (80 g/m2) 100 (80 g/m2) 100 (80 g/m2) Output Paper Capacity(sheets) Optional Paper Tray (sheets) Brother Paper A4 Plain / LTR Plain / A4 Plain / A4 Plain /...
Page 29 AREA ASIA/OCE/ ASIA/OCE/ Model name DCP-340CW MFC-640CW MFC-640CW MFC-640CW MFC-820CW MFC-820CW MFC-820CNW Back Up Print:ON/OFF Feature (in function Menu) Memory Security Transmission Lock 21.7X8.9X17.7inch 21.7X8.9X17.7inch 19.7X8.9X17.7inch 19.7X8.9X17.7inch 19.7X8.9X17.7inch 19.7X8.9X17.7inch 19.7X8.9X17.7inch Dimensions w/ Carton 552X225X450mm 552X225X450mm 500X225X450mm 500X225X450mm 500X225X450mm 500X225X450mm 500X225X450mm (WxDxH) 14.7X13.6X5.3inch 17.2X13.7X6.5inch...
Page 30 AREA ASIA/OCE/ ASIA/OCE/ Model name DCP-340CW MFC-640CW MFC-640CW MFC-640CW MFC-820CW MFC-820CW MFC-820CNW Cable included PictBridge Acceptable Media Card CF/MS/SD(M CF/MS/SD(M CF/MS/SD(M CF/MS/SD(M CF/MS/SD(M CF/MS/SD(M CF/MS/SD(M MC)/SM/xD MC)/SM/xD MC)/SM/xD MC)/SM/xD MC)/SM/xD MC)/SM/xD MC)/SM/xD SUPPLIES/ OPTIONS Bundled Ink (Life / Yield) BK:500pages( BK:500pages( BK:500pages( BK:500pages(...
Page 31 Pages Pages Pages #1/MMR) Memory Transmission UP to 480 UP to 480 UP to 480 UP to 480 UP to 480 UP to 480 (Brother Chart/ MMR) Pages Pages Pages Pages Pages Pages ECM(Error Correction Mode) Error Re-Transmission Broadcasting Yes (130...
Page 32: Post Card
MFC-640CW MFC-640CW MFC-640CW MFC-820CW MFC-820CW MFC-820CNW Out-of-Paper Reception UP to 480 UP to 480 UP to 480 UP to 480 UP to 480 UP to 480 (Brother Chart/ MMR) Pages Pages Pages Pages Pages Pages Color FAX (Memory N/A (If the...
Page 33 AREA ASIA/OCE/ ASIA/OCE/ Model name DCP-340CW MFC-640CW MFC-640CW MFC-640CW MFC-820CW MFC-820CW MFC-820CNW Print Paper Margin (upper, Borderless Borderless Borderless Borderless Borderless Borderless Borderless ON:0, 0, 0,0* ON:0, 0, 0,0* ON:0, 0, 0,0* ON:0, 0, 0,0* ON:0, 0, 0,0* ON:0, 0, 0,0* ON:0, 0, 0,0* lower, left, right) OFF:0.12, 0.12,...
Page 34 1message.) 1message.) 1message.) Toll Saver Memo/Recording Conversation OGM (MC/TAD,F/T) User Recording OGM Yes (20sec.) Yes (20sec.) Yes (20sec.) TIME( MC/TAD, F/T ) PC FAX Supplier Brother Brother Brother Brother Brother Brother Color/Mono Mono Mono Mono Mono Mono Mono Sending Yes (Network /...
Page 35: Full
AREA ASIA/OCE/ ASIA/OCE/ Model name DCP-340CW MFC-640CW MFC-640CW MFC-640CW MFC-820CW MFC-820CW MFC-820CNW Paper Handling Size & Letter Letter Letter Letter Letter Letter Letter Glossy/4"x6"(10 Glossy/4"x6"(10 Glossy/4"x6"(10 Glossy/4"x6"(10 Glossy/4"x6"(10 Glossy/4"x6"(10 Glossy/4"x6"(10 Type (Paper Tray) x15cm) x15cm) x15cm) x15cm) x15cm) x15cm) x15cm) Glossy/5"x7"(13 Glossy/5"x7"(13 Glossy/5"x7"(13...
Page 36 Network Management (BRAdmin Professional) Network Management (Network Remote Setup) Remote Set Up (USB) Network Management (MIB-II as well as Brother private MIB) Network reset (in LAN Menu ) (in LAN Menu ) (in LAN Menu ) (in LAN Menu )
Page 37: Theory Of Operation
CHAPTER THEORY OF OPERATION Confidential...
Page 38: Chapter 3 Theory Of Operation
CHAPTER 3 THEORY OF OPERATION This chapter gives an overview of the scanning and printing mechanisms as well as the sensors, actuators, and control electronics. It aids in understanding the basic principles of operation as well as locating defects for troubleshooting. CONTENTS OVERVIEW ......................3-1 MECHANICAL COMPONENTS.................3-2...
Page 39 - CIS unit - Head/carriage unit - Paper feed - CIS motor - Carriage PCB with motor head flat cables - Carriage motor - Ink refill ASSY - Maintenance unit Handset ADF unit - ADF motor MFC820CW MFC820CW/MFC640CW MFC640CW Confidential...
Page 40: Mechanical Components
3.2 MECHANICAL COMPONENTS This machine consists of the following mechanisms and uses four motors, two encoders, various sensors, and a head thermistor. CANNER MECHANI M PRINTING MECHANI M (Front) nk jet printing and head maintenance (head cap) mechanisms Paper pulling-in and Paper feeding and registration mechanisms ejecting mechanisms...
Page 41 - Document front and rear sensors (See Section 3.2.3.) - Scanner open sensor - Registration sensor - Paper width (media) sensor - Ink cartridge sensors - Purge cam switch - Hook switch sensor (MFC640CW) Thermistor - Head thermistor (See Section 3.2.3.) Confidential...
Page 42 3.2.1 Scanner Mechanism This mechanism consists of the automatic document feeder (ADF), document cover, and scanner unit (scanner cover). The scanner unit consists of a scanner top cover, CIS unit, CIS drive assembly, and scanner base. The detailed illustration on the next page shows the components making up the ADF: document pull-in roller, document separation roller, document feed roller, ADF motor, and document front and rear sensors.
Page 43 Document separation roller Document front sensor actuator Document feed roller Document pull-in roller Document rear sensor Document guide roller Document front sensor Document rear sensor actuator Pinch rollers Document front sensor actuator Document pull-in roller Separation pad ADF motor Output document support Document feed roller Document Document...
Page 44 (1) ADF scanning: Document moves across stationary CIS unit Placing a document face down in the document tray activates the document front sensor, switching to ADF scanning. The CIS drive mechanism (details below) operates for each scanning command executed. The CIS unit first moves to the white-level reference film for white level compensation and then to the ADF scanning position.
Page 45 3.2.2 Printing Mechanism 3.2.2.1 Paper pulling-in, registration, feeding and ejecting mechanisms These mechanisms are driven by a single paper feed motor located at the left of the engine unit via a gear train. (See the illustration on the next page.) The following illustration is a cross-sectional view of the machine viewed from the right.
Page 46 First, the paper feed motor rotates counterclockwise (when viewed from the output gear side). The motor rotation passes to the PF roller gear L and, via the ejection idle gear, the ejection roller gear to rotate the paper feed and ejection rollers in the reverse direction. At the right end of the paper feed roller is the PF roller gear R which is always engaged with the clutch gear and the idle gear L.
Page 47 The outer circumference of the PF roller gear L functions as a 300 dpi (0.084 mm pitch) encoder disk which the PF encoder sensor uses to generate a signal indicating the gear rotation speed--in other words, the paper feed roller speed--to the controller for use in controlling paper feed position and speed.
Page 48 3.2.2.2 Ink supply and ink jet mechanism [ 1 ] Overview The ink supply and ink-jet mechanism consists of the head/carriage unit, four ink cartridges, ink refill assembly, and ink supply tubes. The head/carriage unit scans the surface of the recording paper, jetting out ink supplied through the ink supply tubes onto the paper to produce images.
Page 49 [ 2 ] Features A distinct feature of this machine is the use of ink supply tubes between the ink cartridges and the head/carriage unit. Relieving the head/carriage unit of the task of carrying heavy ink cartridges back and forth across the page, the approach generally adopted by other ink-jet printers, offers the following advantages.
Page 50 [ 3 ] Head/carriage unit The head/carriage unit consists of a front end (ink-jet head) and a back end (buffer and air vent unit). The front end consists of metal plates laminated together and etched to form ink flow channels. (See illustration.) Piezoelectric ceramic actuators generate the spray pressure.
Page 51 Front end components and their main roles - Piezoelectric plate Applying a voltage stretches the plate, serving as the actuator for spraying ink. Consisting of thin piezoelectric plates laminated together, this plate can be driven even by a low voltage. - Filter This removes foreign matter from the ink.
Page 52 Front end ASSY A’ Laminated electrode Channel Piezoelectric plate Nozzle plate Manifold Damper A - A’ Confidential 3-14...
Page 53: Normal
Back end Shutoff valve Damper ASSY (Color) Air vent unit (A part of head/carriage unit) Air vent rods Air vent cap (A part of maintenance unit) Damper ASSY (Black) Back end components and their main roles - Damper assembly This has two roles: dampening the ink pressure fluctuations** in the tubes as the carriage moves and collecting air bubbles that result from pressure changes on the ink.
Page 54 Damping Without damping, ink pressure fluctuations directly affect the size of ink-jet head droplets, risking lower print quality. The damper structure for black differs from that for the colors (C, M, and Y) because black has twice nozzles used for each color, meaning higher ink flow rates and bigger pressure fluctuations. - Color dampers The three color damper assemblies each have two chambers.
Page 55 Air bubble growth Liquid ink contains trace amounts of air. The amount varies with the pressure on the ink because increasing the pressure raises the ink's ability to absorb air from its surroundings and lowering the pressure forces the ink to give up some of this air. The ink pressure fluctuations generated by the piezoelectric ceramic actuators repeatedly expand and contract any air bubbles, causing them to gradually grow larger as the ink pressure changes repeatedly expand and contract them.
Page 56 What's so bad about air bubble growth? Pressure fluctuations do not affect the volume of a liquid (ink), but Boyle's Law says that the volume of a gas (air) varies with the pressure on it. The main issue with air bubbles in the ink flow path is their damping effect, absorbing the pressure from the piezoelectric ceramic actuators and thus degrading ink- jet performance.
Page 57 "Pigment-based ink" Previous Brother machines used only dye-based inks. This one switches to a pigment-based ink for black only, reducing fuzziness from print character outlines, boosting resolution for black dots, and producing clearer images on plain paper.
Page 58 Ink cartridge components and their main roles - Disc valve S A plastic needle in the refill base opens this valve to supply air to the ink cartridge. Removing the ink cartridge closes this valve to prevent leakage due to ink backflow. - Disc valve D A plastic needle in the refill base opens this valve to allow ink to flow out of the ink cartridge.
Page 59 [ 5 ] Ink refill assembly Ink tube joints Ink cartridge base Cartridge clamp springs Ink refill base Ink cartridge joints Ink cartridge sensors Ink cartridge base Polyurethane foam Confidential 3-21...
Page 60 Air flow path Ink flow path Ink refill assembly components and their main roles - Ink refill base This holds the ink cartridges and feeds ink from them to the ink supply tubes. - Cartridge clamp springs These force the ink cartridges into close contact with the ink cartridge joint to prevent ink leakage.
Page 61 [ 6 ] Ink supply tubes These are made of an elastomer providing a highly impermeable barrier against air ingress and drying out of the ink during extended periods of nonuse. This material is also soft and highly flexible to better withstand the sharp and frequent bending associated with high-speed head operation repeatedly over extended periods.
Page 62 3.2.2.3 Head maintenance mechanism [ 1 ] Maintenance mechanism components The head maintenance mechanism consists of the maintenance unit and the ink absorber box. (See the illustration below.) The maintenance unit has the following functions. - Locking the head/carriage unit - Capping the head nozzles to prevent them from drying up (See page 3-26.)
Page 63 - Planetary arm This switches power to the tube pump and pump switching unit depending on the direction of paper feed motor rotation. - Bevel gear This transmits the power from the clutch gear to the planetary arm. - Tube pump A roller squeezes the ink drain tubes looped inside, forcing their contents toward the ink absorber box and creating negative pressure.
Page 64 [ 3 ] Head capping mechanism When the power is off or the machine is not printing, this mechanism fits the head caps tightly over the print head to prevent the head nozzles from drying up and to keep dust off the print nozzle surface.
Page 65 [ 4 ] Purge mechanism This mechanism draws its power from the paper feed motor on the left side of the main chassis. Gears between paper feed motor and maintenance unit As described in Section 3.2.2.1, the motor drives the PF roller gear L that rotates the paper feed roller.
Page 66 When the head/carriage unit travels from the left to right to reach the purge position, a tab on the carriage rear panel pushes the purge lever to the right (left in the illustration). The clutch gear spring pushes the clutch gear to the right, away from idle gear L, to mesh with the purge gear. At the purge position, therefore, the maintenance unit transmits the paper feed motor rotation to the bevel gear.
Page 67 Switching arm assembly inside maintenance unit When the paper feed motor is driving the maintenance unit, counterclockwise (when viewed from the output gear side) rotation drives the purge cam; clockwise rotation, the tube pump. Main drain tube Air vent tube Purge cam Purge bevel gear Pump switching unit...
Page 68 (1) Carriage lock Driving the purge cam pushes the carriage lock up and down. During the purge operation, the carriage lock pops out and locks the head/carriage unit to align ink-jet units with the mating head caps. After the purge operation, but before cleaning with the head wiper starts, the purge cam pulls in the carriage lock and releases the head/carriage unit.
Page 69 (3) Head wiper After the purge operation, the purge cam pushes up the head wiper, wiping off any ink remaining on the head nozzle surface as the head/carriage unit moves from right to left. Maintenance unit Head wiper Purge cam (4) Switching pump The pump switching unit switches the negative pressure from the pump between the black head nozzles, the color head nozzles, and the air vent rod unit.
Page 70 (5) Removing air Another position of the purge cam shifts the slide cams, producing vertical motion of the air vent rods. Pushing up the air vent rods opens the shut-off valves inside the air vent unit of the head/carriage unit. Simultaneously adding negative pressure from the tube pump expels air trapped in the manifolds.
Page 71 Purge types, ink used, purge counts, and purge trigger keys Keys to trigger the purge, to be followed by Black Purge Counts Purge Types Description Ink Used Start key (See Note 2.) (See Note 1 for the DCP340CW.) Normal purge This purge operation removes Black: 0.3 mL Black: 15...
Page 72 Ink cartridge capacities Ink cartridge type Contents Usable portion Spare cartridges Black ink cartridge 18.0 mL Approx. 16.9 mL Color ink cartridges 11.3 mL Approx. 10.5 mL Initial cartridges Black ink cartridge 21.5 mL Approx. 20.4 mL (that ship with the machine) Color ink cartridges 14.2 mL Approx.
Page 73 3.2.2.4 Carriage drive mechanism The head/carriage unit, which integrates the print head unit and carriage, is supported and guided by the CR guide rail and CR support chassis. The CR timing belt (1/25.4 inch pitch) transmits the carriage motor rotation to the carriage. Clockwise motor rotations move the carriage to the right; counterclockwise ones to the left.
Page 74 Adjusting print head angle relative to carriage For optimal image printing, the print head nozzle array must be perpendicular to the head/carriage unit's line of travel. Manufacturing limitations, however, make perfect alignment impossible during mass production. The angle must be adjusted at the individual machine level. The following describes this adjustment mechanism's components and their roles.
Page 75 The same signal also indicates whether there is an ink cartridge present. • The hook switch sensor detects whether the handset is on the handset mount. (MFC640CW) Confidential 3-37...
Page 76 Most sensors are photointerrupters consisting of a light-emitting diode and a light-sensitive transistor. The only exception is the paper width sensor, which uses reflective tape. The illustration on the next page gives the sensor and actuator locations. Actuator's end Light-emitting Light-sensitive diode transistor...
Page 77 Scanner open sensor on the rubber keypad Paper width sensor CR encoder strip CR encoder sensor (Hook switch PCB*) (Head/carriage unit) Document rear sensor Hook switch sensor* Document rear sensor actuator (Lower cover) Hook switch actuator* *MFC640CW Sensors and Actuators Locations Confidential 3-39...
Page 78: Control Electronics
3.3 CONTROL ELECTRONICS 3.3.1 Components The following illustrations show the hardware components for MFC820CW, MFC640CW and DCP340CW. The corresponding wiring diagrams appear in Appendix MFC820CW WLAN Power supply AC line WLAN PCB LAN I/F 4-pin 6-pin Line 2-pin (MJ-line) MJ PCB...
Page 79 MJ PCB SDAA 2-pin (MJ 1) External telephone 2-pin Speaker Main SDRAM ASIC 16MB Control panel PCB (MFC640CW) 9-pin (DCP340CW) 6-pin Scanner open sensor INK JET PRINTING & PAPER FEEDING MODEM Carriage PCB Head/ CR encoder sensor 17-pin (Head 1) carriage...
Page 80 CHAPTER TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR Confidential...
Page 81 CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR This chapter describes how to transfer data left in the machine to be sent for repair. The service personnel should instruct end users to follow the transfer procedure given in this chapter if the machine at the user site cannot print received data due to the printing mechanism defective.
Page 82: Transferring Received Fax Data
4.1 TRANSFERRING RECEIVED FAX DATA When the machine at the user site requires to be repaired, unplugging the power cord from the wall socket for sending the machine for repair will lose received FAX data if unprinted and left in the machine.
Page 83 (8) Enter the telephone number of the receiver machine and press the Menu/Set (OK) key again. NOTE: Be sure to type the telephone number with the numerical keys. No one-touch dialing is allowed in this procedure. The machine displays the "ACCEPTED" for approx. two seconds and starts dialing to transfer data.
Page 84 Cover page sample Job number Total number of pages to be transferred Station ID registered in the sender equipment FAX number of the sender equipment Telephone number of the sender equipment Transfer start date Model code Boot ROM info ROM info Serial number End page sample Job number...
Page 85 CHAPTER DISASSEMBLY/REASSEMBLY AND LUBRICATION Confidential...
Page 86 Center Panel ASSY and Color LCD (MFC820CW) ........5-27 5.1.7 Upper Cover....................5-29 5.1.8 Hook Switch Actuator and Hook Switch PCB (MFC640CW)......5-31 5.1.9 Head/Carriage Unit ..................5-33 5.1.10 Backup Battery (MFC640CW/820CW) ............5-42 5.1.11 Ink Refill ASSY ................... 5-44 5.1.12 Media Module Cover, Main PCB, and WLAN PCB ........
Page 87 5.1 DISASSEMBLY/REASSEMBLY Safety Precautions To prevent the creation of secondary problems by mishandling, observe the following precautions during maintenance work. (1) Before replacing parts or units, unplug the power cord and telephone line. In particular, when having access to the power supply inside the machine, make sure that the power cord is unplugged from the electrical outlet;...
Page 88 Taptite, cup B M3x10 Control panel ASSY (Scanner cover) 0.39 ±0.1 (4 ±1) MFC820CW Taptite, cup B M3x10 0.59 ±0.1 (6 ±1) MFC640CW/DCP340CW Taptite, cup B M3x12 0.39 ±0.1 (4 ±1) Center panel ASSY* Taptite, bind B M3x8 0.20 ±0.06 (2 ±0.6)
Page 89 - the paper tray and - the handset mount (by pulling the tab and sliding the handset mount in the direction of the arrow shown below)*. (3) Remove memory cards if inserted in the machine. *MFC640CW Paper tray Telephone line cord Align the...
Page 90 ! Disassembly Flowchart 5 -4 Confidential...
Page 91 Attach a piece of black adhesive tape. (3) Plug the power cord into an electrical outlet. MFC640CW/820CW (4) Press the Menu/Set (Menu) and Black Start keys. Next press the key four times to make the machine enter the maintenance mode.
Page 92 (6) Make the head/carriage unit travel to the head replacement position (with Function code 63) by pressing the 6, 3 and * keys. For details, refer to Chapter 8, Section 8.4.13 "Travel Check of the Head/Carriage Unit and Initial Setup Mode." (7) Unplug the power cord from the electrical outlet.
Page 93 5.1.2 Jam Clear Cover (1) Press the two latches inwards and pull the jam clear cover out of the machine. Latch Latch Jam clear cover Confidential 5- 7...
Page 94 5.1.3 Scanner Cover (Scanner Unit) The scanner cover should be removed together with the ADF & document cover ASSY whose removal procedure is given in Section 5.1.4. (1) Open the scanner cover to the left until it locks. (2) While supporting the scanner cover by hand, unlatch the scanner cover damper from the scanner cover using an Allen wrench (max.
Page 95 (5) Release the four latches of the CIS flat cable cover and lift it up. CIS flat cable cover Latches Slots Scanner cover (Pawls) Harness cover (MFC820CW) Harness cover Slot (MFC640CW/DCP340CW) Confidential 5- 9...
Page 96 (6) Release the grounding wire by removing the screw. MFC640CW/DCP340CW Disconnect the following cables and harnesses from the main PCB. - the CIS flat cable, - the panel-main harness, - the CIS motor harness, and - the ADF harness MFC820CW Disconnect the panel-center panel harness from the center panel PCB. Then disconnect the following cables and harnesses from the main PCB.
Page 97 (5-pin, MFC820CW) (7) Press section "X" (shown on the previous page) on the left edge of the scanner cover outwards to provide enough gap and pull out the panel-main harness (MFC640CW/DCP340CW) or panel-center panel harness (MFC820CW) from the cable guide.
Page 98 (9) As shown below, remove the scanner cover damper from the scanner cover stopper. Scanner cover stopper Scanner cover damper (10) Turn the scanner cover stopper upright and remove it from the upper cover by pressing the front and rear locks. Scanner cover stopper Upper cover Confidential...
Page 99 Center panel-main harness • Before connecting the panel-main harness (MFC640CW/DCP340CW) or center panel-main harness (MFC820CW) to the main PCB, press section "X" on the left edge of the scanner cover outwards to provide enough gap and route the panel-main harness through the cable guide on the...
Page 100 Slightly turn those hinges and remove them from the ASSY. ADF & document cover ASSY Hinge Scanner cover (Scanner unit) Hinge Grounding wire ADF harness Groove CIS motor harness Panel-main harness (MFC640CW/DCP340CW) Panel-center panel harness (MFC820CW) Confidential 5 - 1 4...
Page 101 < Disassembly of the ADF & document cover ASSY > ADF cover ASSY 1) Slightly warp the ADF cover ASSY and remove it from the bosses provided on the front and rear side of the ADF & document cover ASSY. Hole ADF cover ASSY Hole...
Page 102 3) Remove the ADF pull-in piece and its spring from the ADF cover. ADF cover ADF pull-in piece ADF pull-in spring 4) Remove the separation pad from the ADF cover. ADF cover Separation pad Confidential 5 - 1 6...
Page 103 Document stopper and document ejection films 5) Remove the document stopper. 6) Remove the document ejection films. NOTE: Once removed, the document ejection films will become unusable and new parts will have to be put back in. Document stopper Document ejection films ADF &...
Page 104 Document guides (F and R) 8) Remove the screw from the document guide gear. Take the document guide gear and its spring out of the document cover. 9) As shown below, slide each of the document guides F and R inwards ( ), pull down the bottom end ( ), slide it inwards further, and take it up ( ).
Page 105 Document front and rear sensor actuators 10) Lightly press the locking arm for each of the document front and rear sensor actuators, slide the actuator towards the locking arm, and remove it in the direction of the arrow shown below. The actuator springs also come off.
Page 106 ADF motor and document feed roller 11) Take the ADF harness and grounding wire out of the harness guide provided on the ADF unit. 12) Remove the screw that secures the grounding wire and ADF motor together. 13) Remove the screw from the ADF motor and disconnect the ADF harness from the motor. 14) Remove the pawl bushing from the front end of the document feed roller shaft and remove the document feed roller gear from the read end.
Page 107 Document front and rear sensors, document pull-in roller, and document separation roller 15) Remove the two screws and take the ADF reinforcement plate off the ADF unit. 16) Remove the document front and rear sensors by unhooking the three latches each. Disconnect the ADF harness from each sensor.
Page 108 Reassembling Notes • Route the ADF harness (consisting of the ADF motor harness and document front and rear sensor harnesses) on the ADF unit as shown below. Routing of the document rear sensor harness (of the ADF harness) Document rear sensor (Front) Document front sensor Routing of the document front...
Page 109 5.1.5 Control Panel ASSY and Scanner Open Sensor Actuator MFC640CW/DCP340CW (1) Turn the scanner cover (scanner unit) upside down, push the left side outwards, and take out the panel-main harness. (2) Remove the three screws from the underside of the scanner cover.
Page 110 5) Remove the microphone from the control panel. 6) Pull the locking arms outwards and take out the LCD while pulling the LCD flat cable gently. (The illustration given below is based on the MFC640CW.) Locking arm LCD flat cable...
Page 111 MFC820CW (1) Turn the scanner cover (scanner unit) upside down. (2) Remove the four screws from the underside of the scanner cover. (3) Insert the tip of a flat screwdriver through the slot provided in the bottom of the scanner cover, unlatch the retainer on the control panel ASSY, and pull up the left end of the control panel ASSY.
Page 112 Disassembly of the control panel ASSY 1) Place the control panel ASSY upside down. 2) Pull the "X" latch outwards to release the front edge of the control panel PCB L and remove it to the front. Remove the rubber keypad L. 3) Pull the two "Y"...
Page 113 5.1.6 Center Panel ASSY and Color LCD (MFC820CW) (1) Disconnect the center panel-main harness from the main PCB. (2) Turn up the color LCD towards you to an angle of approx. 45°. Release the right and left bosses provided on the cable protection plate (black plastic plate) from the center panel ASSY by warping the plate.
Page 114 (5) Warp the cable protection plate and release it from the color LCD. Color LCD Taptite, bind B M3x6 Cable protection plate Plastic hinge Latch LCD leaf spring LCD flat cable Cable film Right side of the color LCD Pulling the LCD leaf spring outwards to mount the plastic hinge Upper cover...
Page 115 5.1.7 Upper Cover MFC640CW/DCP340CW (1) Remove the four screws from the upper cover. (2) Release the five retainers provided on the upper cover and lift up the upper cover. Retainer Upper cover Taptite, bind B M4x12 Retainer Retainers Lower cover...
Page 116 Reassembling Notes • When mounting the upper cover: Make sure that the head/carriage unit is placed in the head capping position to prevent the ink supply tubes from getting crushed between the upper and lower covers. Take care not to deform the PF encoder disk. Be careful not to pinch the ink absorber box.
Page 117 5.1.8 Hook Switch Actuator and Hook Switch PCB (MFC640CW) (1) Pull the hook switch actuator outwards, turn it counterclockwise to release it from the boss, and take it up and out of the lower cover. The actuator spring also comes off.
Page 118 (2) Disconnect the hook switch harness from the main PCB. (3) Insert the tip of a flat screwdriver through the square cutout provided in the bottom of the machine, release the latch to the front, and lift up the hook switch PCB. Confidential 5 - 3 2...
Page 119 5.1.9 Head/Carriage Unit During disassembly jobs, except when removing the ink refill ASSY or engine unit (including the maintenance unit), leave the head/carriage unit and all four ink cartridges in the machine. Before removing the head/carriage unit, ink refill ASSY or engine unit, you need to replace the current ink cartridges with dummy ones and drain ink from the ink refill ASSY and head/carriage unit (see Section...
Page 120 Draining the ink from the ink supply tubes and moving the head/carriage unit to the head replacement position (Refer to Section 5.1.1.) (1) Make sure that: - the ink in the ink refill ASSY and head/carriage unit has been drained, - all four ink cartridges have been replaced with protective cartridges, - the head/carriage unit is placed in the head replacement position, and - the power cord is unplugged from the electrical outlet.
Page 121 Removing the carriage PCB and head flat cables (3) Disconnect the head flat cables 1 and 2 from the main PCB and pull them out to the rear through the opening provided in the lower cover as shown below. NOTE: Take care not to drop the flat core from the head flat cables. (4) Slide the FFC support to the rear and lightly pull up the cable clamp to release the support from the cable clamp.
Page 122 (7) Pull up the front edge of the carriage PCB to release the rear edge from the two latches provided on the head/carriage unit. Then lift the carriage PCB up and out of the head/carriage unit. Carriage PCB lat core Latches Head/carriage unit Cable clamp on the head joint...
Page 123 Removing the head joint (8) Pull the joint leaf spring to the right to release the head joint. (9) Pull the head joint up and off the head/carriage unit. Remove the head joint rubber (that is a part of the head/carriage unit but may be attached to the head joint) and put it on a clean vinyl sheet while taking care not to contaminate it.
Page 124 Removing the head/carriage unit and CR timing belt NOTE: During the removal or installation job for the head/carriage unit, take care not to contaminate the CR encoder strip or PF encoder disk with grease applied to the head/carriage unit. (10) While pressing the idle pulley to the right, remove the CR timing belt from the carriage motor pulley and idle pulley.
Page 125 (14) A head/carriage unit is assigned a property code that represents the properties unique to that head/carriage unit. The property code is printed on a property label that is attached to the carriage-head flat cable and the machine. When you remove the head/carriage unit and store it separately from the machine, remove the property label from the machine and store it together with the head/carriage unit.
Page 126 NOTE: When storing the head/carriage unit for a long period, be sure to put an air buffer cap on the head/carriage unit and store the unit in the head casing, as shown below. Leaving the head/carriage unit out of the casing will cause the print nozzles and ink supply ports to dry up, resulting in a damaged head.
Page 127 6) Fit the FFC support to the head joint, sliding it along the joint's cable clamp. 7) Route the head flat cable 1 as shown on page 5-35 and secure it to the lower cover with the double-sided adhesive tape attached in 1) above. 8) Mount the head cover.
Page 128 5.1.10 Backup Battery (MFC640CW/820CW) (1) Disconnect the battery harness from the main PCB. (2) Release the ink supply tubes routed on the lower cover from the tube guides. NOTE: Releasing those tubes makes it easy to release the battery harness from the hook provided on the lower cover since the battery harness is routed beneath those tubes.
Page 129 Reassembling Notes • Route the battery harness beneath the ink supply tubes as shown below. Backup battery Ink supply tubes Cable guides Battery harness (MFC640CW/820CW) Main PCB Confidential 5 - 4 3...
Page 130 5.1.11 Ink Refill ASSY (1) Take the ink supply tubes routed on the lower cover out of the machine. (2) Press the latch provided on the front side of the ink cartridge base inwards with a flat screwdriver and lift the ink cartridge base up and out of the lower cover. NOTE: Inside the ink cartridge base is an ink absorber foam that may be stained with ink.
Page 131 5.1.12 Media Module Cover, Main PCB, and WLAN PCB CAUTION: Before accessing the main PCB, make sure that the power cord is unplugged from the electrical outlet and the telephone line is disconnected; otherwise, an electric shock could occur. CAUTION: At the time of removal of the main PCB, untightening screws should be preceded by disconnection of the harnesses and flat cables, and at the time of installation, connection of the harnesses and flat cables, by tightening of screws.
Page 132 Head flat cable 1 (17-pin) MJ-main harness 1 (2-pin)* Head flat cable 2 (19-pin) Carriage motor harness (2-pin) (CIS flat cable) (12-pin) PF motor/sensor PCB harness (7-pin) (Panel-main harness) (9-pin, MFC640CW) (6-pin, DCP340CW) (USB) (Scanner motor harness) (LAN) (4-pin) (Battery harness) (4-pin, MFC640CW)
Page 133 MFC820CW Speaker harness (2-pin) MJ-line harness (2-pin) Head flat cable 1 (17-pin) MJ-main harness 1 (2-pin) Head flat cable 2 (19-pin) Carriage motor harness (2-pin) (CIS flat cable) (12-pin) PF motor/sensor PCB harness (7-pin) (Center panel-main harness) (5-pin) (USB) (LAN) (Scanner motor harness) (4-pin) (Battery harness)
Page 134 WLAN PCB Lower cover Reassembling Notes • MFC640CW/820CW, European/Oceanian/Asian models If the main PCB is replaced, attach the thermal conductor rubber removed from the old PCB to a new one as specified below. The thermal conductor rubber should not protrude from the The thermal conductor rubber edge of the PCB.
Page 135 • MFC640CW/820CW Before securing the main PCB shield, connect the MJ-line harness and MJ-main harness to the main PCB and route them through the SDAA enclosure as shown below. CIS motor harness and Speaker harness Panel-main harness (red) (MFC640CW/DCP340CW) MJ-line harness *...
Page 136 5.1.13 MJ/PS Shield Box, MJ PCB* and Power Supply PCB *Not provided on the DCP340CW (1) Remove the two screws. (2) Insert the tip of a flat screwdriver through square cutout "x" and push boss "X" inwards to release the MJ/PS shield box. Taptite, cup S M3x6 Lower cover Boss "X"...
Page 137 (3) Remove screw "a" from the MJ shield and take it off the lower MJ/PS shield. (4) Remove the power supply shield. (5) Remove four screws ("c1" through "c4") from the power supply PCB. (6) Remove screw "b" from the MJ PCB and take it off the lower MJ/PS shield. "a"...
Page 138 5.1.14 Ink Absorber Box (1) Pull out the two tubes (main drain tube and opening tube to the atmospheric air) from the ink absorber box. NOTE: Pinch the end of the main drain tube with a clip to prevent drained ink from leaking and the machine from getting stained with leaked ink.
Page 139 • If you replace the ink absorber box (without replacing the main PCB), you need to reset the purge counter in the EEPROM to zero according to the procedure below. MFC640CW/820CW 1) Press the Menu/Set (Menu) and Black Start keys. Next press the key four times to make the machine enter the maintenance mode.
Page 140 5.1.15 Engine Unit and Maintenance Unit During disassembly jobs, except when removing the ink refill ASSY or engine unit (including the maintenance unit), leave the head/carriage unit and all four ink cartridges in the machine. Before removing the head/carriage unit, ink refill ASSY or engine unit, you need to replace the current ink cartridges with dummy ones and drain ink from the ink refill ASSY and head/carriage unit (see Section...
Page 141 Removing the maintenance unit and related parts (2) Remove two screws, "e" from the top of the engine unit and "f" from the right side of the maintenance unit. (3) Remove the maintenance unit. (4) Unlatch the purge cam switch from the maintenance unit. (5) Remove the purge-related parts from the engine unit as shown below.
Page 142 5.1.16 Components on the Engine Unit Removing the CR encoder strip (1) Unhook the CR encoder strip from the engine unit. NOTE: Take care not to scratch or damage the encoder strip. If it becomes dirty, wipe it with a soft, dry cloth.
Page 143 Removing the paper pull-in gear shaft and roller holder (2) Press the locking arm and pull out the paper pull-in gear shaft to the right. (3) Remove the paper pull-in roller holder. Engine unit Paper pull-in gear shaft Paper pull-in roller holder Locking arm Viewed from the bottom Paper pull-in gear shaft...
Page 144 Removing the paper ejection roller (4) At the left end of the paper ejection roller, release the lock arm of bushing L from the hole provided in the chassis of the engine unit and turn bushing L clockwise (viewed from the right). At the right end, release the lock arm of bushing R from the chassis and turn it clockwise to the horizontal position, then remove the paper ejection roller towards you.
Page 145 Removing the platen (5) Pull out the platen towards you. Edge "B" CR support chassis CR guide rail Paper feed roller shaft "A" Slit "b" "a" Platen Reassembling Note: Make sure that section "a" and slit "b" on the platen are fitted over paper feed roller shaft "A"...
Page 146 Removing the star wheel holder ASSY (6) Release the two latches provided on the star wheel holder ASSY from the CR support chassis and take the ASSY out of the engine unit. Latches Star wheel holder ASSY CR guide rail CR support chassis Carriage motor harness Confidential...
Page 147 Removing the paper pressure holder and registration sensor actuator (7) Release the latch provided on the paper pressure holder from the engine unit and remove the holder to the left and rear. The four paper pressure springs also come off. Latch Paper pressure springs Paper pressure holder...
Page 148 (8) Unhook the sensor actuator spring from the paper pressure holder and turn the registration sensor actuator in the direction of the arrow as shown below to release it. Sensor actuator spring Registration sensor actuator Registration sensor actuator Paper pressure holder Sensor actuator spring Hooking the sensor actuator spring Confidential...
Page 149 Removing the flushing case (9) Press the locking pawl from the bottom of the flushing case and slide the case to the right and rear. lushing case Engine unit Boss P motor/sensor PCB harness Boss Locks Locking pawl iewed from the bottom Confidential 5 - 6 3...
Page 150 Reassembling Note: If you replace the flushing case, you need to reset the flushing counter in the EEPROM to zero according to the procedure below. MFC640CW/820CW 1) Press the Menu/Set (Menu) and Black Start keys. Next press the key four times to make the machine enter the maintenance mode.
Page 151 Removing the carriage motor (10) Release the carriage motor from the engine unit by removing the two screws. Screw, bind M3x3 CR guide rail CR support chassis Carriage motor Confidential 5 - 6 5...
Page 152 Removing the PF sensor PCB (11) Disconnect the PF motor/sensor PCB harness from the PF sensor PCB. (12) Remove the screw from the PF sensor PCB and release the PCB from the engine unit, taking care not to touch the PF encoder disk. Paper feed roller Engine unit PF motor/sensor PCB harness...
Page 153 Removing the PF encoder disk, plastic retaining ring, ejection idle gear and paper feed motor (13) Peel off the PF encoder disk from the PF roller gear only when it should be replaced. NOTE: Once removed, the PF encoder disk will become unusable and a new disk will have to be put back in.
Page 154 (15) Remove the two screws and release the paper feed motor from the engine unit. To the PF sensor PCB Paper feed motor Paper feed roller Engine unit PF roller gear L PF motor/sensor PCB Screw, bind M3x3 harness Reassembling Note: When attaching the PF encoder disk to the PF roller gear, put on clean gloves to protect the disk surface from dust or fingerprints.
Page 155 5.1.17 Routing of the Harnesses and Flat Cables Routing A: Center panel-main harness and panel-center panel harness on the upper cover (MFC820CW) Grounding wire CIS motor harness ADF harness Panel-center panel harness Center panel-main harness Routing B: ADF harness on the ADF unit Routing of the document rear sensor harness (of the ADF harness) Document rear sensor...
Page 156 Routing C: Panel-main harness (MFC640CW/DCP340CW) or panel-center panel harness (MFC820CW) on the underside of the control panel ASSY MFC640CW Cable guides Control panel ASSY placed upside down DCP340CW Cable guides Control panel ASSY placed upside down Ribs MFC820CW Panel PCB R-L harness...
Page 157 Routing D: Backup battery harness and ink supply tubes Backup battery Ink supply tubes Cable guides Battery harness (MFC640CW/820CW) Main PCB Confidential 5 - 7 1...
Page 158: Top View
Speaker harness (2-pin) Ink supply tubes PF motor/sensor PCB harness (7-pin) CIS motor Battery harness harness (4-pin) (4-pin) (MFC640CW/ ADF harness 820CW) (10-pin) WLAN PCB harness (Main PCB) (6-pin) (WLAN PCB) Power supply Color LCD flat cable Purge cam switch...
Page 159 Viewed from the left CIS motor harness (4-pin) ADF harness (10-pin) MJ-line harness (2-pin) * Speaker harness (2-pin) Panel-main harness (9-pin, MFC640CW) MJ-main harness 1 (2-pin) * (6-pin, DCP340CW) WLAN PCB harness (6-pin) PF motor/sensor PCB harness (7-pin) Carriage motor harness...
Page 160 Routing F: MJ-main harness* and MJ-line harness* through the SDAA enclosure *Not provided on the DCP340CW. CIS motor harness and Speaker harness Panel-main harness (red) (MFC640CW/DCP340CW) MJ-line harness * MJ-main harness * (blue) (black) Main PCB SDAA enclosure * Not provided on the...
Page 161 5.2 LUBRICATION Apply the specified lubricants to the lubrication points as shown below. Lubricant type (Manufacturer) Lubrication points Lubricant amount Molykote EM-60L Head/carriage unit 3 mm dia. ball (Dow Corning) Molykote EM-30LG Document pull-in roller 4 mm dia. ball (Dow Corning) Document separation roller Head/carriage unit Apply a 3 mm dia.
Page 162 Document pull-in roller and document separation roller Apply a 4 mm dia. ball of grease (Molykote EM-30LG) to each of the following lubrication points. Confidential 5 - 7 6...
Page 163 CHAPTER ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT Confidential...
Page 164 CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT This chapter details adjustments and updating of settings, which are required if the head/carriage unit, main PCB and some other parts have been replaced. CONTENTS PREPARATION .......................6-1 6.1.1 Requirements ....................6-1 6.1.2 Loading the Update Programs/Data to the Machine .........6-2 IF YOU REPLACE THE HEAD/CARRIAGE UNIT OR ENGINE UNIT ......6-6...
Page 165 IF YOU REPLACE THE INK ABSORBER BOX............6-26 Reset the purge counter to zero with the following procedure......6-26 IF YOU REPLACE THE CONTROL PANEL PCB (MODELS WITH BACKLIGHTS) ... 6-27 Adjust the light intensity of the backlight............6-27 IF YOU REPLACE THE SCANNER COVER (SCANNER UNIT).........
Page 166 Before proceeding to perform any adjustments or update any settings, you need to have the executables, files, spare parts and supplies (provided by Brother Industries) on hand and set up your NOTE: Use a PC/AT-compatible computer running Windows 98SE, Windows Me, Windows 2000 Professional, or Windows XP Home/Professional.
Page 167 PCB to be unusable. You will need to replace the main PCB and load update programs/data to a new PCB. Preparation You need to have the BHL2-Maintenance Printer driver and FILEDG32.exe (provided by Brother Industries) on hand. Save them in an arbitrary folder in your PC. Installing the BHL2-Maintenance Printer driver To identify terminals connected via USB interface, a PC requires the corresponding virtual USB devices to be implemented by driver/software.
Page 168 (6) The following screen appears, indicating the detection of new hardware device by the system. Click Next to proceed. (7) Select "Search for a suitable driver for my device (recommended)" and click Next. (8) Select "Specify a location" and click Next. Confidential 6- 3...
Page 169 (9) Select the folder where the copy of the BHL2-Maintenance Printer driver is located (or click Browse to specify it), then click OK. (This sample screen is captured on the Windows 2000 desktop.) (10) Click Next. (11) To proceed, click Yes. Confidential 6- 4...
Page 170 (12) If the driver is successfully installed, the following message window appears. Click Finish to return to Windows. NOTE: After completion of the driver installation, if the machine exits the maintenance mode, the "Found New Hardware Wizard" screen in step (6) appears again. Click Cancel. NOTE: To check that the printer driver is successfully installed, click Start|Settings|Printers to call up the Printers window as shown below and confirm that the BHL2-Maintenance Printer icon is displayed.
Page 171 6.2 IF YOU REPLACE THE HEAD/CARRIAGE UNIT OR ENGINE UNIT [ 1 ] Update the head property information stored in the EEPROM on the main PCB In the following procedure, key names enclosed in parentheses apply to the MFC820CW. (1) Make sure that the machine's power cord is unplugged from an electrical outlet. If the machine is connected to a PC, unplug the USB cable.
Page 172 (8) In Port, select the port number assigned to the BHL2-Maintenance Printer. To confirm the port number, follow the instructions below. Click Start | Settings | Printers. The Printers window appears as shown below. Right-click the BHL2-Maintenance Printer icon. Click Properties. Confidential 6- 7...
Page 173 The BHL2-Maintenance Printer Properties window appears as shown below. Click the Ports tab. The port number assigned to the Brother BHL2-Maintenance Printer, USB010 in this example, is one that has been selected in Port on the BrUsbSn screen (page 6-6).
Page 174 [ 2 ] Clean the new head/carriage unit MFC820CW/640CW (1) Open the scanner unit (scanner cover), set new ink cartridges into the ink refill ASSY, and close the scanner unit. (2) Carry out "Initial purge" (with Function code 76) using the steps below. (See Chapter 8, Section 8.4.20.)
Page 175 [ 3 ] Correct the positioning error of the head/carriage unit (1) Run "FILEDG32.exe" in the folder created. The Filedrgs window appears as shown below. (2) Drag and drop the "INCLINE.PRN" icon onto the BHL2-Maintenance Printer icon in the Filedrgs window shown above. The "Incline Adjust"...
Page 176 (4) Move the head/carriage unit to the head replacement position (with Function code 63) using the following key operation. MFC820CW/640CW Press the 6, 3, and * keys in this order. DCP340CW Enter 6, 3, and * by using the and Set keys.* (*To enter a numerical code on models having no numerical keypad, press the key several times to display the numerical code to be entered and then press the Set key.
Page 177 [ 4 ] Update the paper feeding correction value (1) Run "FILEDG32.exe" in the folder created in Section 6.1.1. The Filedrgs window appears as shown below. (2) Drag and drop the "PFROLL.PRN" onto the BHL2-Maintenance Printer icon in the Filedrgs window shown above.
Page 178 (5) Check PF adjust check pattern "A" (on the next page) and select the one that is the least uneven print. Make a note of that pattern number. If the unevenness is far to the left of check pattern -8, regard it as -8; if it is far to the right of check pattern +8, regard it as +8.
Page 179 "A" ⇒ "B" ⇒ Paper Feeding Check Patterns for the Paper Feed Roller and Paper Ejection Roller Confidential 6 - 1 4...
Page 180 [ 5 ] Align vertical print lines (1) MFC820CW/640CW Press the 6, 5 and 1 keys in this order. DCP340CW Enter 6,5, and 1 by using the and Set keys on the machine.* (*To enter a numerical code on models having no numerical keypad, press the key several times to display the numerical code to be entered and then press the Set key.
Page 181 Vertical Alignment Check Patterns Confidential 6 - 1 6...
Page 182 [ 6 ] Margin adjustment in near-edge printing (1) On the PC, run "FILEDG32.exe" in the folder created in Section 6.1.1. The Filedrgs window appears as shown below. (2) Drag and drop the "EDGE_CHECK.PRN" onto the BHL2-Maintenance Printer icon in the Filedrgs window shown above.
Page 183 In the following procedure, key names enclosed in parentheses apply to the MFC820CW. (6) Enter the measured value (in units of 0.1 mm) multiplied by 10. (Example) Left: 10, Right: 13 MFC820CW/640CW In this example, press the 1, 0, Menu/Set (OK), 1, 3, and Menu/Set (OK) keys. DCP340CW In this example, enter 1, 0, 1, and 3 by using the and Set keys.*...
Page 184 Margin Check Pattern Confidential 6 - 1 9...
Page 185 [ 7 ] Print out a test pattern MFC820CW/640CW Press the 0 and 9 keys in this order. DCP340CW Enter 0 and 9 by using the and Set keys.* (*To enter a numerical code on models having no numerical keypad, press the key several times to display the numerical code to be entered and then press the Set key.
Page 186: If You Replace The Main Pcb
6.3 IF YOU REPLACE THE MAIN PCB NOTE: If you replace the main PCB, also replace the ink absorber box. Using the machine without replacing the ink absorber box for a long period may cause an overflow of drained ink from the ink absorber box, thereby staining the machine.
Page 187 [ 3 ] Customize the EEPROM on the main PCB (Function code 74) Refer to Chapter 8, Section 8.4.18. [ 4 ] Check the control panel PCB for normal operation (Function code 13) Refer to Chapter 8, Section 8.4.6. [ 5 ] Make a sensor operational check (Function code 32) Refer to Chapter 8, Section 8.4.7.
Page 188 (5) In Port, select the port number assigned to the BHL2-Maintenance Printer driver. To confirm the port number, follow the instructions below. Click Start|Settings|Printers. The Printers window appears as shown below. Right-click the BHL2-Maintenance Printer driver icon. Confidential 6 - 2 3...
Page 189 Click Properties. The BHL2-Maintenance Printer Properties window appears as shown below. Click the Ports tab. The port number assigned to the BHL2-Maintenance Printer, USB010 in this example, is one that has been selected in Port on the BrUsbSn screen (page 6-22).
Page 190 (8) Check whether the entered character strings (ID code and head property information) are correct with the following procedure. MFC820CW/640CW Press the 8 and 0 keys in this order. Then press the Black Start key several times, and the ID code appears on the LCD.
Page 191 6.4 IF YOU REPLACE THE INK ABSORBER BOX Reset the purge counter to zero with the following procedure. MFC820CW/640CW (Key names enclosed in parentheses apply to the MFC820CW.) (1) Press the Menu/Set (Menu) and Black Start keys. Next press key four times to make the machine enter the maintenance mode.
Page 192: Scanner Unit
6.5 IF YOU REPLACE THE CONTROL PANEL PCB (MODELS WITH BACKLIGHTS) Adjust the light intensity of the backlight. Refer to Chapter 8, Section 8.4.5. 6.6 IF YOU REPLACE THE SCANNER COVER (SCANNER UNIT) Check the CIS type and write it to the EEPROM. Refer to Chapter 5, Section 5.1.3 Chapter 8, Section 8.4.12.
Page 193 CHAPTER CLEANING Confidential...
Page 194 CHAPTER 7 CLEANING This chapter provides cleaning procedures not covered by the User's Guide. Before starting any repair work, clean the machine as it may solve the problem concerned. CONTENTS CLEANING THE MAINTENANCE UNIT ..............7-1 For the cleaning procedures of the head/carriage unit, scanner, and platen, refer to the User's Guide.
Page 195 7.1 CLEANING THE MAINTENANCE UNIT (1) Unplug the machine's power cord from the wall socket. (2) Plug the power cord again. After you hear the head/carriage unit moving out of the home position for initialization, unplug the power cord again. The head/carriage unit will stop at the middle of the travel.
Page 196: Maintenance Mode
CHAPTER MAINTENANCE MODE Confidential...
Page 197 CHAPTER 8 MAINTENANCE MODE This chapter describes the maintenance mode which is exclusively designed for the purpose of checks, settings and adjustments using the keys on the control panel. In the maintenance mode, you can update memory (EEPROM: electrically erasable programmable read-only memory) contents for optimizing the drive conditions of the head/carriage unit, paper feed roller or paper ejection roller (if they have been replaced) or for setting the CIS scanner area, for example.
Page 198 8.4.19 Travel of Head/Carriage Unit (for Recovery from Paper Jam Caused at Maintenance Unit) (Function code 75) ............8-42 8.4.20 Purging Operation (Function code 76)............8-43 8.4.21 Display of the Equipment's Log (Function code 80) ........8-46 8.4.22 Equipment Error Code Indication (Function code 82)........8-49 8.4.23 Output of Transmission Log to the Telephone Line (Function code 87) (Not applicable to DCP340CW) ..............
Page 199: Entry Into The Maintenance Mode
8.1 ENTRY INTO THE MAINTENANCE MODE MFC820CW/640CW (Key names enclosed in parentheses apply to the MFC820CW.) Press the Menu/Set (Menu) and Black Start keys. Next press the key four times to make the machine enter the maintenance mode. TIP: FAX models equipped with numerical keypads can enter the maintenance mode in the same way as conventional models;...
Page 200 8.2 LIST OF MAINTENANCE-MODE FUNCTIONS Maintenance-mode Functions Function Reference Function Code Section (Page) EEPROM Parameter Initialization 8.4.1 (8-5) Printout of Scanning Compensation Data 8.4.2 (8-6) Test Pattern 8.4.3 (8-8) Firmware Switch Setting 8.4.4 (8-10) Printout of Firmware Switch Data 8.4.4 (8-13) Operational Check of LCD 8.4.5 (8-15) Operational Check of Control Panel PCB...
Page 201 8.3 USER-ACCESS TO THE MAINTENANCE MODE Basically, the maintenance-mode functions listed on the previous page should be accessed by service personnel only. However, you can allow end users to access some of these under the guidance of service personnel (e.g., by telephone). The user-accessible functions (codes 10, 11, 12, 53, 66, 75, 76, 80, 82, 87, and 91) are shaded in the table given on the previous page.
Page 202 MFC640CW keys Sto p /Exit ke y Menu/Set ke y Black Start ke y DCP340CW (1) Press the Menu, Mono Start, Menu, and Mono Start keys in this order. The "MAINTENANCE 10" appears on the LCD. (2) To access the function code 10, press the Set key.
Page 203 8.4 DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS 8.4.1 EEPROM Parameter Initialization (Function code 01, 91) Function The machine initializes the parameters, user switches, and firmware switches registered in the EEPROM, to the initial values. Entering the function code 01 initializes almost all of the EEPROM areas, but entering 91 does not initialize some areas, as listed below.
Page 204 8.4.2 Printout of Scanning Compensation Data (Function code 05) Function The machine prints out the white and black level data for scanning compensation. Operating Procedure Do not start this function merely after powering on the machine but start it after carrying out a sequence of scanning operation.
Page 205 Scanning Compensation Data List Confidential 8 - 7...
Page 206 8.4.3 Test Pattern (Function code 09) Function This function, much like the copying function, prints out a test pattern (PRINT QUALITY CHECK SHEET) to allow the service personnel to check for print quality. Operating Procedure MFC820CW/640CW Press the 0 and 9 keys in this order in the initial stage of the maintenance mode. DCP340CW Enter 0 and 9 by using the and Set keys.*...
Page 207 Test Pattern Confidential 8- 9...
Page 208 8.4.4 Firmware Switch Setting and Printout (Function codes 10 and 11) [ A ] Firmware switch setting Function The machine incorporates the following firmware switch functions which can be activated with the procedures using the control panel keys. The firmware switches have been set at the factory in conformity to the communications standards and codes of each country.
Page 209 Firmware Switches (WSW01 through WSW51) Continued WSW No. Function WSW34 Function setting 12 WSW35 Function setting 13 WSW36 Function setting 14 WSW37 Function setting 15 WSW38 V.34 transmission settings WSW39 V.34 transmission speed WSW40 V.34 modem settings WSW41 ON-duration of the scanning light source WSW42 Internet mail settings WSW43...
Page 210 DCP340CW (1) Enter 1 and 0 by using the and Set keys.* (*To enter a numerical code on models having no numerical keypad, press the key several times to display the numerical code to be entered and then press the Set key. Repeat this operation for each numerical code.) The machine displays the "WSW00"...
Page 211 [ B ] Printout of firmware switch data Function The machine prints out the setting items and contents specified by the firmware switches. Operating Procedure (1) MFC820CW/640CW Press the 1 key twice in the initial stage of the maintenance mode. DCP340CW Enter 1 twice by using the and Set keys.*...
Page 212 Configuration List Confidential 8 -1 4...
Page 213 (white) to display the numerical code to be entered and then press the Set key. Repeat this operation for each numerical code.) MFC640CW/DCP340CW Black Start (Mono Start) Black Start (Mono Start) Black Start (Mono Start) Confidential 8 - 1 5...
Page 214 Adjusting the light intensity of the backlight: (1) MFC640CW Press the 1 and 2 keys in this order in the initial stage of the maintenance mode. DCP340CW Enter 1 and 2 in the initial stage of the maintenance mode by using the and Set keys.*...
Page 215 (3) After the last number key is pressed, the machine beeps and returns to the initial stage of the maintenance mode. To terminate this operation, press the Stop/Exit key. The machine returns to the initial stage of the maintenance mode. MFC820CW MFC640CW Key Entry Order (1) Confidential 8 - 1 7...
Page 216 DCP340CW Key Entry Order (2) Confidential 8 - 1 8...
Page 217 - Cyan ink cartridge sensor - Magenta ink cartridge sensor - Head driver chip temperature sensor - Hook switch (MFC640CW) Operating Procedure (1) MFC820CW/640CW Press the 3 and 2 keys in this order in the initial stage of the maintenance mode.
Page 218 Driver chip temperature within the allowable range. Hook switch* On-hook state. * MFC640CW The HK is displayed even on those models not equipped with their related sensors. (2) Change the detecting conditions (e.g., open the scanner unit or insert paper through the registration sensor or remove the ink cartridges), and then check that the indication on the LCD changes according to the sensor states.
Page 219 8.4.8 Transfer of Received FAX Data and/or Equipment's Log (Function code 53) Function This function transfers received FAX data to another machine. It is useful when the machine cannot print received data due to the printing mechanism defective. NOTE: This function is available in the MFC820CW/640CW. NOTE: The number of files that can be transferred at a time is 99.
Page 220 Cover page sample Job number Total number of pages to be transferred Station ID registered in the sender equipment FAX number of the sender equipment Telephone number of the sender equipment Transfer start date Model code Boot ROM info ROM info Serial number End page sample Job number...
Page 221 8.4.9 Fine Adjustment of Scanning Start/End Position (Function code 54) This function is available in models with ADFs. 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 "SCAN START ADJ."...
Page 222 8.4.10 Acquisition of White Level Data and CIS Scanner Area Setting (Function code 55) Function This function allows the machine to obtain white level data for the CIS scanner and save it together with the CIS scanner area into the EEPROM on the main PCB. Operating Procedure (1) MFC820CW/640CW Press the 5 key twice in the initial stage of the maintenance mode.
Page 223 8.4.11 Updating of Paper Feeding Correction Value (Function code 58) Function To keep the paper feeding performance in the best condition for quality print, the controller optimizes the rotation of the paper feed roller, using the correction value stored in the EEPROM on the main PCB.
Page 224 (6) MFC820CW/640CW Press the 5 and 8 keys on the machine. DCP340CW Enter 5 and 8 by using the and Set keys on the machine.* (*To enter a numerical code on models having no numerical keypad, press the key several times to display the numerical code to be entered and then press the Set key.
Page 225 The "EXIT ADJ NO. +0" appears on the LCD. (12) Check the PF adjust check patterns ("B" on page 8-28) and select the one that is the least uneven print. Make a note of that pattern number. (13) Enter the number of the least uneven check pattern found in step (11). The machine automatically returns to the initial stage of the maintenance mode.
Page 226 "A" ⇒ "B" ⇒ Paper Feeding Check Pattern for the Paper Feed Roller and Paper Ejection Roller Confidential 8 - 2 8...
Page 227 MFC820CW: The "1:WHT 2:FRT 3:MV" (CIS travel menu) appears on the LCD. (3) MFC640CW: Press the Menu/Set key three times. Accordingly, the "LED PWM," "G PULSE," and "1:WHT 2:FRT 3:MV" (CIS travel menu) appear on the LCD in this order.
Page 228 The "1:MO 2:CO 3:CHG" appears on the LCD. This menu is for checking scanning clocks at the factory. Skip this menu and call up the CIS travel menu by performing steps (2) through (4). (2) Enter 1 by using the and Set keys.* The "LED PWM: "...
Page 229 8.4.13 Travel Check of the Head/Carriage Unit and Initial Setup Mode (Function code 63) Function This procedure moves the head/carriage unit to the head replacement position (Function code 63 + It can also enable or disable the initial setup mode when the power is applied at the next time (Function code 63 + 1 or Function code 63 +3).
Page 230 8.4.14 Alignment of Vertical Print Lines in Monochrome (Function code 65) Function This function allows you to align vertical lines printed in the forward and backward direction of the head/carriage unit. If the head/carriage unit or main PCB is replaced with a new one, you need to make the adjustment given in this section.
Page 231 (4) On the 2nd sheet, check the printed vertical alignment pattern for 750 dpi and perform the same operation as in step (2). The machine automatically returns to the initial stage of the maintenance mode. NOTE: If #1 or #8 block is fully aligned so that you press the 1 or 8 key (or you enter 1 or 8) in the above procedure, then go back to step (1) to confirm that #5 block becomes aligned.
Page 232 1st sheet 2nd sheet Vertical Alignment Check Patterns Confidential 8 - 3 4...
Page 233 8.4.15 Margin Adjustment in Near-edge Printing (Function code 66) Function This function allows you to adjust the left and right margins for near-edge printing. You print out a set of margin check patterns, measure the margins, and enter the correction values. Operating Procedure (1) Switch on your PC.
Page 234 (7) MFC820CW/640CW If either margin is out of the specified range, press the 6 key twice on the machine. DCP340CW If either margin is out of the specified range, enter 6 twice by using the and Set keys on the machine.* (*To enter a numerical code on models having no numerical keypad, press the key several times to...
Page 235 Margin Check Pattern Confidential 8 - 3 7...
Page 236 8.4.16 Updating of Property Data (Function code 68) Function To keep the print quality, the controller optimizes the drive conditions of individual head/carriage units according to the property data. For instance, the controller optimizes the head drive strength, ink jet-out timing and other drive conditions according to the electromechanical properties unique to individual head/carriage units and ambient temperature.
Page 237 (4) Press the Menu/Set key (OK key on MFC820CW, Set key on DCP340CW). The machine beeps, shows the "INPUT ACCEPTED" on the LCD, and writes the entered property code into the EEPROM. Then it returns to the initial stage of the maintenance mode. NOTE: If the entered data contains any checksum error, the machine beeps, shows the "INPUT ERROR,"...
Page 238 8.4.17 Head/Carriage Unit Traveling Speed Check (Function code 69) Function This function checks whether or not the traveling speed of the head/carriage unit is within the specified range. This procedure should be performed when you replace the head/carriage unit, carriage motor, or CR encoder strip or when you loosen the timing belt.
Page 239 8.4.18 EEPROM Customizing (Function code 74) Customizing codes comes with the firmware data provided by Brother Industries. Function This function allows you to customize the EEPROM according to language, function settings, and firmware switch settings. NOTE: If you replace the main PCB, be sure to carry out this procedure.
Page 240 8.4.19 Travel of Head/Carriage Unit (for Recovery from Paper Jam Caused at Maintenance Unit) (Function code 75) Function This function is used for paper jam recovery. If a paper jam occurs at the maintenance unit, using this function moves the head/carriage unit to the center of its travel, allowing you to easily remove the jammed paper.
Page 241 8.4.20 Purging Operation (Function code 76) Function The machine can carry out several types of purging operations--normal purge, power purge, initial purge, reset purge, engine setup purge, cartridge replacement purge, ink drain purge, and initial liquid substitute purge. This function allows you to select the desired purge type and carry it out. TIP: The purge types and their details are described on the next page.
Page 242 Purge types, ink used, purge counts, and purge trigger keys Keys to trigger the purge, to be followed by Black Purge Counts Purge Types Description Ink Used Start key (See Note 2.) (See Note 1 for the DCP340CW.) Normal purge This purge operation removes Black: 0.3 mL Black: 15...
Page 243 (Note 2) This machine counts all purge operations and flushing operations performed since produced in order to prevent the ink absorber box and flushing case from overflowing with drained and flushed ink, respectively. An initial purge, for example, advances the counter by 187 + 420 = 607.
Page 244 8.4.21 Display of the Equipment's Log (Function code 80) Function The machine can display its log information on the LCD. This procedure allows you to reset the purge count. It is necessary to reset the purge count when the ink absorber box is replaced with a new one without replacing the main PCB. Operating Procedure (1) MFC820CW/640CW Press the 8 and 0 keys in this order in the initial stage of the maintenance mode.
Page 245 If you press the Black Start key, the screen goes back to the calendar clock in step (1) above. (3) To stop this operation and return to the machine to the initial stage of the maintenance mode, press the Stop/Exit key. To check each of the four ink cartridges, press the Menu/Set (OK) key.
Page 246 28th) Total power-ON time 29th) Error code of the most recent machine error* 30th) Flat-bed page count, indicating how many documents have been scanned 31st) Error code of the most recent communications error* 32nd) ADF page count, indicating how many pages the ADF has been fed 33rd) ADF paper jam count, indicating how many times a paper jam has occurred If you press the Mono Start key, the screen goes back to the calendar clock in step (1) above.
Page 247 8.4.22 Equipment Error Code Indication (Function code 82) Function This function displays an error code of the last error on the LCD. Operating Procedure (1) MFC820CW/640CW Press the 8 and 2 keys in this order in the initial stage of the maintenance mode. DCP340CW Enter 8 and 2 in the initial stage of the maintenance mode by using the and Set keys.*...
Page 248 8.4.24 Cancellation of the Pin TX Lock Mode (Not applicable to U.S.A. models or DCP340CW) Function This procedure can cancel the Pin TX lock mode. Use this procedure if the user forgets his/her password entered when setting the Pin TX lock mode so as not to exit from the mode. NOTE: Carrying out this procedure will lose passwords previously entered but retain FAX messages received in the Pin TX lock mode.
Page 249 CHAPTER ERROR INDICATION AND TROUBLESHOOTING Confidential...
Page 250 CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING This chapter details error messages and codes that the incorporated self-diagnostic functions display if any error or malfunction occurs. If any error message appears, refer to this chapter to find which components should be checked or replaced. The latter half of this chapter provides sample problems that could occur in the main sections of the machine and related troubleshooting procedures.
Page 251 [ 4 ] Auto document feeder (ADF) malfunction ..........9-39 9.2.6 Possible component defects and resulting problems ........9-41 [ 1 ] ADF mechanism .................. 9-41 [ 2 ] Scanner mechanism................9-42 [ 3 ] Head/carriage unit drive and purge mechanisms........9-43 [ 4 ] Print head mechanism................
Page 252: Error Indication
(that is, make the machine enter the maintenance mode and then press the 8 and 2 keys). Following the MACHINE ERROR, one of the error codes listed in [ 2 ] will appear on the LCD. [ 1 ] Error messages appearing on the LCD MFC640CW/DCP340CW Messages on the LCD Probable Cause Comm.Error Poor phone line quality caused a communication error.
Page 253 Messages on the LCD Probable Cause High Temperature The temperature inside the machine is high. Ink Empty One or more of the ink cartridges is empty. The machine will stop all print operations. While memory is available, black and white faxes will be received into memory. If a sending machine has a color fax, the machine's 'handshake' will request that the fax be sent as black and white.
Page 254 MFC820CW Messages on the LCD Probable Cause BT Call Sign On BT Call Sign is set to ON. You cannot change the Receive (For UK only) Mode from Manual to another mode. Comm.Error Poor phone line quality caused a communication error. Connection Fail You tried to poll a fax machine that is not in Polled Waiting mode.
Page 255 Messages on the LCD Probable Cause Media Error The media card is either corrupted, improperly formatted, or there is a problem with the media card. Near Empty One or more of the ink cartridges are running out of ink. If a sending machine has a color fax, the machine's 'handshake' will ask that the fax be sent as black and white.
Page 256 [ 2 ] Error codes contained in "MACHINE ERROR X X" messages If the LCD shows the "UNABLE TO PRINT" message, you can display the detailed error code following the MACHINE ERROR by using maintenance-mode function code 82 described in Chapter 8, Section 8.4.22.
Page 257 Error Code Symptom Probable Cause Solution (Hex) 40-41 Not used. Replace the The head drive voltage has Piezoelectric (PZT) head/carriage unit. not dropped from the high ceramic actuator to low level within the defective Replace the power specified period. supply PCB. Replace the main PCB.
Page 258 Error Code Symptom Probable Cause Solution (Hex) Weak connection of the Head flat cables or Replace those cables or head flat cables. carriage-head flat cable correct their connection. broken or not connected Head flat cables and Correct those flat The head drive voltage has carriage-head flat cable cables.
Page 259 Error Code Symptom Probable Cause Solution (Hex) 53-56 Not used. Head cap unit, head Set these parts back into After a purging operation, place. wiper or other parts on the head/carriage unit will the maintenance unit not return to the home If any part on the interfering with the position (capping...
Page 260 Error Code Symptom Probable Cause Solution (Hex) 5D-5F Not used. Clean the platen. Paper width sensor (media Paper width sensor sensor) error. broken Replace the carriage PCB ASSY. Head flat cables or Replace the carriage carriage-head flat cable PCB ASSY. broken Main PCB defective Replace the main PCB.
Page 261 Error Code Symptom Probable Cause Solution (Hex) Recording paper jam. Foreign materials in the Remove foreign paper path materials. (The paper width sensor keeps detecting paper The paper ejection Replace the paper even after completion of roller does not rotate ejection roller.
Page 262 Error Code Symptom Probable Cause Solution (Hex) Recording paper jam. The paper ejection Replace the paper (The registration sensor roller does not rotate ejection roller. stays ON after completion correctly (Engine unit) of paper ejection Foreign materials in the Remove foreign operation.) paper path.
Page 263 Error Code Symptom Probable Cause Solution (Hex) Recording paper jam. Recording paper not Instruct the user to load (Even after paper pulling-in loaded correctly the recording paper operation, the registration correctly. sensor is still OFF.) Objects, such as bits of Remove the objects from paper or chips, are in the paper tray.
Page 264 Error Code Symptom Probable Cause Solution (Hex) Abnormal load applied Replace the PF-related The paper feed motor does to the paper feed roller gear(s). not rotate. PF-related gear(s) broken PF encoder disk Replace the PF encoder stained or scratched disk. PF encoder sensor Replace the PF sensor defective...
Page 265 Error Code Symptom Probable Cause Solution (Hex) Max. speed error in the Abnormal load applied Check the PF roller gear paper feed motor. to the paper feed roller and its related gears. (Not used.) PF encoder disk Replace the PF encoder stained or scratched disk.
Page 266 Error Code Symptom Probable Cause Solution (Hex) CIS flat cable not Correct the connection. 50% or more faulty of connected properly white level data. (Not used.) CIS defective Replace the scanner cover (scanner unit). Main PCB defective Replace the main PCB. FAX scanning failure (1st CIS defective Replace the scanner...
Page 267 Error Code Symptom Probable Cause Solution (Hex) Not used. Dark level offset data CIS defective Replace the scanner level error for scanning. cover (scanner unit). (Not used.) Main PCB defective Replace the main PCB. Gain control data level CIS defective Replace the scanner error for scanning.
Page 268 Error Code Symptom Probable Cause Solution (Hex) Not used. CIS defective Replace the scanner White level data error. cover (scanner unit). Main PCB defective Replace the main PCB. Not used. CIS defective Replace the scanner Black level data error. cover (scanner unit). Main PCB defective Replace the main PCB.
Page 269 Error Code Symptom Probable Cause Solution (Hex) Not used. Data scanning error during CIS defective Replace the scanner transmission. cover (scanner unit). Main PCB defective Replace the main PCB. Not used. Document removed at Document front sensor Correct the surrounding phase B.* actuator caught on the parts on which the...
Page 270 9.1.2 Communications Errors If a communications error occurs, the machine: emits an audible alarm (intermittent beeping) for approximately 4 seconds, displays the corresponding error message, and prints out the transmission verification report if the machine is in sending operation. Confidential 9 - 1 9...
Page 271 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. No response from the remote station in sending.
Page 272 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 mailbox function.
Page 273 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 274 ID checking Code 1 Code 2 Causes Password plus "lower 4 digits of telephone number" not coincident. Password not coincident. Polling ID not coincident. DCN reception Code 1 Code 2 Causes DCN received. TCF transmission/reception Code 1 Code 2 Causes Fallback impossible.
Page 275 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 276 (11) General communications-related Code 1 Code 2 Causes Unable to receive the next-page data. Unable to receive polling even during turn-around transmission due to call reservation. PC interface error. (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.
Page 277: Troubleshooting
9.2 TROUBLESHOOTING 9.2.1 Introduction This section gives the service personnel some of the troubleshooting procedures to be followed if an error or malfunction occurs with the machine. 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 278 Recording paper Check that: (1) A recommended type of recording paper is used. (2) The recording paper is not dampened. Ink cartridges (1) Check that all of four ink cartridges are loaded. Head/carriage unit (1) Check that the carriage-head flat cable is connected to the carriage PCB. (2) Repeat the head purging operation several times.
Page 279 Problem Check: • Panel-main harness (MFC640CW/DCP340CW) (1) LCD shows nothing. • LCD flat cable or color LCD (MFC820CW) • Control panel PCB (MFC640CW/DCP340CW) • Power supply PCB • Main PCB • Panel-main harness (MFC640CW/DCP340CW) (2) Control panel inoperative. • Panel-center panel harness or center panel-main harness (MFC820CW) •...
Page 280 [ 3 ] Communications problems Problem Check: (1) No tone is transmitted. • Main PCB • MJ PCB [ 4 ] Paper/document feeding problems Problem Check: (1) The "Enter Fax No." message • Sensors by using maintenance-mode function code 32. (Refer does not appear although Chapter 8, Section 8.4.7.)
Page 281 [ 5 ] Print-image problems If there is any problem with any image received or sent, first make a copy of it using the machine. If the copied image is normal, the cause of the problem may be the remote terminal; if it is abnormal, proceed with the following checks: Examples of Defective Images Completely blank...
Page 282 Problem Action to be taken (1) Completely blank At the scanner Check that the document is placed facing in the correct direction. In ADF scanning (available only in models with ADF units), is the document placed face down in the document tray? In flat-bed scanning also, is the document placed face down on the scanner glass? Check the following components:...
Page 283 Problem Action to be taken (4) Light At the scanner Check the following components: - CIS unit - Main PCB At the printer Check the following components: - Ink cartridges - Head/carriage unit - Main PCB - Power supply PCB - Head property info (to be installed to the main PCB from the connected PC.
Page 284 Problem Action to be taken Printer (7) Ink splash • Perform the head purging operation several times to remove dust or air bubbles from its nozzles. • Check the ink cartridges. Any of them has run out of ink or the ink viscosity has been increased, so replace it.
Page 285 Problem Action to be taken (10) White horizontal streaks • Perform the head purging operation several times to remove dust or air bubbles from its nozzles. • Replace the head/carriage unit. • Check the paper feed-related rollers. • Perform the print head skew compensation with the head screw adjuster knob.
Page 286 [ 6 ] PC-driven printing problems Problem Action to be taken (1) PC-driven printing is • Interface with the host computer impossible. • PC interface cable • Main PCB • USB interface [ 7 ] Memory card driven printing (SmartMedia, Compact Flash, Memory Stick, SD card, or XD) Trouble Action to be taken (1) No image data can be read.
Page 287 [ 8 ] Wireless LAN (WLAN) Trouble Action to be taken Check the following: (1) PC-driven printing via the wireless LAN is - The address has not been changed at both the FAX impossible. machine and PC. - Connection between the WLAN PCB and the main PCB - WLAN PCB [ 9 ] Others Trouble...
Page 288 9.2.5 Problems encountered frequently in the past This section lists the four problems most frequently encountered during on-site service in the past. - Paper jams - Error message "MACHINE ERROR 4F" - Ink-related problems - Auto document feeder (ADF) failure [ 1 ] Paper jams A paper jam may occur not only due to machine malfunction but also to the user's actions.
Page 289 [ 2 ] "MACHINE ERROR 41" error message The error message "MACHINE ERROR 41" appears if the head drive voltage drops from the high to low level in an abnormally short period. The source of the problem is either the head/carriage unit or power supply PCB.
Page 290 Problems due to machine malfunction Check Possible causes Problems that may result Head/carriage unit Dot missing occurs on the - Air bubbles, high viscosity ink, or printout. foreign materials have found their way into the head/carriage unit. The machine will not be able to - Head flat cables are broken.
Page 291 Problems due to machine malfunction Check Possible causes Problems that may result Main PCB The motor driver IC is defective. Documents will not be able to be drawn in. The spring plates of the ADF parts Documents will stop halfway are deformed.
Page 292 9.2.6 Possible component defects and resulting problems This section lists possible component defects and what happens due to them. It also describes what happens if the necessary adjustments or data settings into the memories is not made. [ 1 ] ADF mechanism Defective component Result Error codes...
Page 293 [ 2 ] Scanner mechanism Defective component Result Error codes CIS unit - Any of the following images may appear on the A7, B9, printout of sent, copied, or scanned data: BB, BD - When the power is turned on, abnormal noises will be heard from the machine.
Page 294 [ 3 ] Head/carriage unit drive and purge mechanisms Defective component Result Error codes - Any of the following images may appear on the Head/carriage unit printout of sent, copied, or scanned data: - The head/carriage unit will not be able to travel Carriage motor 30, 31, 32, normally.
Page 295 Defective component Result Error codes - Any of the following images may appear on the Maintenance unit printout of sent, copied, or scanned data: Head caps or wiper - The purge pump will not draw out ink from the head Purge pump nozzles.
Page 296 [ 5 ] ASF mechanism Defective component Result Error codes Bank ASSY - Two or more sheets of paper will be fed at once. 82, 83, 88 (shown on page 9-37) - Paper will jam. [ 6 ] Paper feeding mechanism Defective component Result Error codes...
Page 297 [ 8 ] Control panel Defective component Result Error codes Rubber keypad - Keys will not work. Control panel PCB - The LCD will show nothing. - Keys will not work. [ 9 ] PCBs Defective component Result Error codes - No faxes will be able to be sent.
Page 298 [ 10 ] Adjustments/data in the memories Adjustment/data Error setting not Result Refer to: codes performed Proper - The machine will not work correctly - Chapter 8, customizing code at the shipping destination. Section 8.4.18 (in the EEPROM) - Appendix 3 ID code - The machine will not be able to be - Chapter 6,...
Page 299 Adjustment/data Error setting not Result Refer to: codes performed Alignment of - The following image may appear on - Chapter 6, vertical print lines the printout of sent, copied, or Section 6.2, [ 5 ] scanned data: - Chapter 8, Section 8.4.14 Confidential 9 - 4 8...
Page 300 MFC820CW MFC640CW DCP340CW Appendix 1. Serial Numbering System T his appendix shows the location of serial number labels put on some parts and lists the coding information pertaining to the serial numbers. Confidential...
Page 301 SERIAL NUMBERING SYSTEM Individual machines have a serial number label for the machine itself and a property label for the head/carriage unit. Individual ink cartridges also have a serial number label. T his section lists the coding information for those serial numbers and property codes. (1) Se rial numbe r labe l for the machine itse lf Product item code Serial number...
Page 302 (2) He ad prope rty labe l Property label for the head/carriage unit Head property code Production lot number Serial number (6-digit) Production year (Example) 5 : 2005 6 : 2006 Production month January July August February March September April October November December...
Page 303 (3) Se rial numbe r labe l for ink cartridge s Product code Barcode Factory code Production year (Example) 05 : 2005 06 : 2006 Production date (Example) 11 : 11th 20 : 20th Production month January July February August September March April...
Page 304 MFC820CW MFC640CW DCP340CW Appendix 2. Firmware Installation T his appendix provides instructions on how to update firmware stored in the flash ROM on the main PCB or load firmware to a new main PCB from the host PC. No hardware replacement is required for updating.
Page 305: Flash Rom
Preparation You need to have the BHL2-Maintenance Printer driver and FILEDG32.exe (provided by Brother Industries) on hand. Save them in an arbitrary folder in your PC. Installing the BHL2-Maintenance Printer driv er (In the following procedure, key names enclosed in parentheses apply to the MFC820CW or DCP340CW.) T o identify terminals connected via USB interface, a PC requires the corresponding virtual USB devices to be implemented by driver/software.
Page 306 (6) T he following screen appears, indicating the detection of new hardware device by the system. Click Ne xt to proceed. (7) Select "Search for a suitable driver for my device (recommended)" and click Ne xt. (8) Select "Specify a location" and click Ne xt. Confidential Ap p.
Page 307 (9) Select the folder where the copy of the BHL2-Maintenance Printer driver is located (or click Browse to specify it), then click O K. (T his sample screen is captured on the Windows 2000 desktop.) (10) Click Ne xt. (11) T o proceed, click Ye s. Confidential Ap p.
Page 308 "Found New Hardware Wizard" screen in step (6) appears again. Click Cance l. NO TE: check that printer driver successfully installed, click Start|Se ttings|Printe rs to call up the Printers window as shown below and confirm that the Brother BHL2-Maintenance Printer icon is displayed. Confidential Ap p. 2-4...
Page 309 Loading the update programs/data onto the flash ROM of the machine Afte r re placing the main PCB with a ne w one After the installation procedure of the printer driver, proceed to the firmware loading operation. When the power is first applied to the FAX machine equipped with a new main PCB, the machine automatically enters the maintenance mode.
Page 310 (3) MFC820CW/640CW Press the * and # keys at the same time when the machine is on standby. T he firmware version appears on the LCD. DCP340CW Press the Me nu and Mono Start keys. Next press the key four times to make the machine enter the maintenance mode.
Page 311 Afte r re placing the main PCB with the one use d for othe r machine s or whe n updating program/data After the installation procedure of the printer driver, proceed to the firmware loading operation. If the printer driver has been installed so that you start from loading firmware, unplug the power cord from the electrical outlet.
Page 312 (3) MFC820CW/640CW Press the * and # keys at the same time when the machine is on standby. T he firmware version appears on the LCD. DCP340CW Press the Me nu and Mono Start keys. Next press the key four times to make the machine enter the maintenance mode.
Page 313 Note: Customizing codes customize firmware for individual models, enabling the common firmware to be used for various models. They come with the firmware data provided by Brother Industries.
Page 314 EEPROM CUSTOMIZING CODES This function allows you to customize the EEPROM according to language, function settings, and firmware switch settings. Customizing codes come with the firmware data provided by Brother Industries. Operating Procedure MFC820CW/640CW (In the following procedure, key names enclosed in parentheses apply to the MFC820CW.) (1) Press the Menu/Set (Menu) and Black Start keys.
Page 315 MFC820CW MFC640CW DCP340CW Appendix 4. Firmware Switches (WSW) This appendix describes the functions of the firmware switches, which can be divided into two groups: one is for customizing preferences designed for the shipping destination (as described in Appendix 3) and the other is for modifying preferences that match the machine to the environmental conditions.
Page 316 WSW No. Function Refer to: WSW01 Dial pulse setting App. 4-2 WSW02 Tone signal setting App. 4-3 WSW03 PABX mode setting App. 4-4 WSW04 TRANSFER facility setting App. 4-5 WSW05 1st dial tone and busy tone detection App. 4-6 WSW06 Pause key setting and 2nd dial tone detection App.
Page 317 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 318 Selector 7: Switching between pulse (DP) and tone (PB) dialing, by the function switch This selector determines whether or not the dialing mode can 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 can be changed by the function switch.
Page 319 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 Detection time length of 0 1 0 : 500 ms...
Page 320 Selectors 6 and 7: Dial tone detection in PABX (Not used.) 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 machine starts dialing upon detection of a dial tone when a line is connected.
Page 321 Selector 4: Dual tone detection sensitivity in ICM recording Setting this selector to "1" increases the tone detection sensitivity in ICM recording. Selectors 6 through 8: Break time length for flash function These selectors set the break time length. This setting is effective only when the flash function is selected for the Speed Dial key by using the function switch.
Page 322 Selectors 1 through 3: 1st dial tone detection These selectors activate or deactivate the 1st dial tone detection function which detects the 1st dial tone issued from the PSTN when a line is connected to the PSTN. Setting all of these selectors to "1" activates the dial tone detection function so that the machine starts dialing upon detection of a dial tone when a line is connected.
Page 323 WSW06 (Pause key setting and 2nd dial tone detection) Selector Function Setting and Specifications 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 324 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 machine will insert WAIT as defined in the above table. If the Pause key is pressed repeatedly, the machine inserts the specified WAIT multiplied by the number of depressions.
Page 325 WSW07 (Dial tone setting 1) Selector Function Setting and Specifications No. 1 2 : Narrows by 10 Hz Dial tone frequency band control : Initial value : Widens by 10 Hz Line current detection 0: No 1: Yes (Not used.) No.
Page 326 WSW08 (Dial tone setting 2) Selector Function Setting and Specifications No. 1 2 3 0 0 0 : 50 ms 0 0 1 : 250 ms 0 1 0 : 500 ms 1st dial tone detection time 0 1 1 : 620 ms length 1 0 0 :...
Page 327 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 0: 300 sec. 60 sec.
Page 328 WSW10 (Protocol definition 2) Selector Function Setting and Specifications Not used. Time length from transmission of the last dial digit to CML 0: 100 ms 1: 50 ms Time length from CML ON to 0: 2 sec. 1: 4 sec. CNG transmission Time length from CML ON to CED transmission (except for...
Page 329 WSW11 (Busy tone setting) Selector Function Setting and Specifications No. 1 : Narrows by 10 Hz Busy tone frequency band control : Initial value : Widens by 10 Hz 1: 250-750/250-750 ms 1: 400-600/400-600 ms ON/OFF time length ranges 1: 175-440/175-440 ms for busy tone (More than one setting 1: 100-1000 ms/17-660 ms...
Page 330 WSW12 (Signal detection condition setting) Selector Function Setting and Specifications No. 1 1500 ms Min. detection period required 500 ms for interpreting incoming calling signal (CI) as OFF 700 ms 900 ms No. 3 6 sec. Max. detection period for incoming calling signal (CI) 7 sec.
Page 331 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 332 WSW14 (AUTO ANS facility setting) Selector Function Setting and Specifications No. 1 13 Hz Frequency band selection (lower 15 Hz limit) for incoming calling signal (CI) 23 Hz 20 Hz No. 3 30 Hz Frequency band selection (upper 55 Hz limit) for incoming calling signal (CI) 70 Hz : 200 Hz...
Page 333 WSW15 (REDIAL facility setting) Selector Function Setting and Specifications No. 1 5 minutes Redial interval 1 minute 2 minutes 3 minutes No. 3 16 times 1 times No. of redialings 2 times 3 times 15 times Not used. CRP option 0: Disable 1: Enable Selectors 1 through 6: Redial interval and No.
Page 334 WSW16 (Function setting 1) Selector Function Setting and Specifications Not used. ITU-T (CCITT) superfine 0: OFF 1: ON recommendation Not used. Max. document length 0: 400 cm 1: 90 cm limitation Stop key pressed during 0: Not functional 1: Functional reception NOTE: Selector 7 is applicable to models equipped with ADF units.
Page 335 WSW17 (Function setting 2 Selector Function Setting and Specifications No. 1 No alarm Always valid Off-hook alarm Valid except when 'call reservation' is selected. Not used. Calendar clock type U.S.A. type 1: European type Not used. Non-ring reception 1: ON Not used.
Page 336 WSW18 (Function setting 3) Selector Function Setting and Specifications Not used. No. 2 40 sec. Detection enabled time for CNG 0 sec. (No detection) or no tone 5 sec. 80 sec. Not used. Registration of station ID Permitted Prohibited No. 7 No monitoring Up to phase B at the Tone sound monitoring...
Page 337 WSW19 (Transmission speed setting) Selector Function Setting and Specifications No. 1 First transmission speed choice No. 4 for fallback 2,400 bps 4,800 bps 7,200 bps 9,600 bps 12,000 bps Last transmission speed choice for fallback 14,400 bps V.34 mode 0: Permitted 1: Prohibited V.17 mode 0: Permitted...
Page 338 WSW20 (Overseas communications mode setting) Selector Function Setting and Specifications EP* tone prefix 0: OFF 1: ON Overseas communications 0: 2100 Hz 1: 1100 Hz mode (Reception) Overseas communications 0: OFF 1: Ignores DIS once. mode (Transmission) No. 4 100 ms Min.
Page 339 Selectors 8: Limitation on CNG detection If this selector is set to "1," the machine detects a CNG signal according to the condition preset by selectors 2 and 3 of WSW18 after a line is connected. If it is set to "0," the machine detects a CNG signal as long as the line is connected.
Page 340 WSW22 (ECM and call waiting caller ID) 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% Acceptable TCF bit error rate (%) 0: 0% 1: 4%...
Page 341 WSW23 (Communications setting) Selector Function Setting and Specifications 0: From the head of a series of zeros Starting point of training check (TCF) 1: From any arbitrary point No. 2 Allowable training error rate 0.5% No. 4 Decoding error rate for transmission of RTN Not used.
Page 342 WSW24 (TAD setting 2) Selector Function Setting and Specifications 15 sec. 20 sec. Maximum OGM recording time 30 sec. 50 sec. 4 sec. Time length from CML ON to start of pseudo ring 2 sec. backtone transmission 6 sec. 8 sec. Attenuator for playback of 0 dB 8 dB...
Page 343 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. models only. Selectors 5 through 7: Pause between paging number and PIN These selectors set the pause time between a telephone number being paged and PIN (personal...
Page 344 WSW26 (Function setting 4) Selector Function Setting and Specifications Not used. Dialing during document reading into the temporary 0: Disable 1: Enable memory in in-memory message transmission No. of CNG cycles to be No. 4 detected (when the line is connected via the external telephone except in the external TAD mode or via the built-in telephone)
Page 345 WSW27 (Function setting 5) Selector Function Setting and Specifications Not used. Ringer OFF setting 0: Yes 1: No Automatic playback of OGM when 0: No 1: Yes switched to the TAD mode Detection of distinctive ringing pattern 0: Yes 1: No (Not used.) Recording quality 0: Normal...
Page 346 WSW28 (Function setting 6) Selector Function Setting and Specifications No. 1 2 3 0 0 0 0 dB 0 0 1 +1 dB 0 1 0 +2 dB Transmission level of DTMF 0 1 1 +3 dB high-band frequency signal 1 0 0 0 dB 1 0 1...
Page 347 WSW29 (Function setting 7) Selector Function Setting and Specifications No. 1 2 3 0 0 0 -47.0 dBm (A) 0 0 1 -48.5 dBm (B) Compression threshold level for 0 1 0 -50.0 dBm (C) voice signals inputted via the 0 1 1 -51.5 dBm (D) telephone line in the built-in...
Page 348 WSW30 (Function setting 8) Selector Function Setting and Specifications No. 1 2 3 0 0 0 -38.0 dBm (A) 0 0 1 -39.5 dBm (B) 0 1 0 -41.0 dBm (C) Dial tone/busy tone detection level during recording of ICM 0 1 1 -42.5 dBm (D) (Not used.)
Page 349 WSW31 (Function setting 9) Selector Function Setting and Specifications Not used. Default reduction rate for failure of automatic reduction 0: 100% 1: 70% during recording Not used. (Do not disturb this selector.) Minimum ON and OFF duration of ringer signals 0: 130 ms 1: 90 ms effective in distinctive ringing...
Page 350 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 machine is turned on or completes a transaction.
Page 351 WSW33 (Function setting 11) Selector Function 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 (C) Detection threshold level of "no 0 1 1 : -47.0 dBm (D) tone"...
Page 352 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 3 sec. case of automatic line 4 sec. disconnection due to no voice 5 sec.
Page 353 WSW35 (Function setting 13) Selector Function Setting and Specifications No. 1 2 3 4 0 0 0 0 : No detection 0 0 0 1 : 1 sec. Max. detection period of dial tone/busy tone during recording of 0 0 1 0 : 2 sec.
Page 354 WSW36 (Function setting 14) Selector Function Setting and Specifications ECP mode* 0: ON (Not used.) Recovery from Inactive PC Interface 0: Disable Enable (Not used.) PC Power-off Recognition Time 0: Normal Long (Not used.) Not used. Escape from phase C 0: Yes No.
Page 355 Selectors 6 through 8: Extension of incoming calling signal (CI) frequency band specified by selectors 1 through 4 of WSW14 At the start of reception, if the machine detects the frequency of a CI signal specified by selectors 1 through 4 of WSW14, it starts the ringer sounding. However, the machine may fail to detect the CI signal normally due to noise superimposed at the time of reception.
Page 356 WSW38 (V.34 transmission settings) Selector Function Setting and Specifications No. 1 X : Automatic Setting of the equalizer : Fixed to 4 points : Fixed to 16 points Sending level of guard tone at 0: Normal - 7 db 1: Normal phase 2 Stepping down the transmission 0: 2400 bps...
Page 357 WSW39 (V.34 transmission speed) Selector Function Setting and Specifications No. 1 No. 5 2400 bps 4800 bps 7200 bps First transmission speed choice for fallback 9600 bps 12000 bps 14400 bps 16800 bps 19200 bps 21600 bps 24000 bps 26400 bps 28800 bps Last transmission speed choice for fallback...
Page 358 WSW40 (V.34 modem settings) Selector Function Setting and Specifications Not used. Not masking Masking No. 3 3429 symbols/sec No. 4 3200 symbols/sec Masking of symbol rate(s) No. 5 3000 symbols/sec No. 6 2800 symbols/sec No. 7 Not used. No. 8 2400 symbols/sec NOTE: WSW40 takes effect only when the V.34 mode is permitted (WSW19, selector 7) in models supporting V.34 mode.
Page 359 Symbol rate Transmission speed Symbol rate Transmission speed Symbol rate Transmission speed (bps) (bps) (bps) 2400 2400 3000 4800 3429 4800 4800 7200 7200 7200 9600 9600 9600 12000 12000 12000 14400 14400 14400 16800 16800 16800 19200 19200 19200 21600 21600 21600...
Page 360 WSW41 (ON-duration of the scanning light source) Selector Function Setting and Specifications No. 1 2 3 0 0 0 16 hours 0 0 1 24 hours ON-duration of the scanning 0 1 0 12 hours light source at room 0 1 1 8 hours temperature 1 0 0...
Page 361 WSW42 (Internet mail settings) Selector Function Setting and Specifications Access to the incoming mail (POP3) server 0: Disable 1: Enable (Periodical or on-demand) Access to the outgoing mail 0: Disable 1: Enable (SMTP) server I-FAX relay 0: Disable 1: Enable Not used.
Page 362 WSW44 ( Speeding up scanning-1) Selector Function Setting and Specifications Not used. No. 6 7 8 0 0 0 : Obtained compensation data ineffective 0 0 1 : 1 min. Effective time length of the white level compensation data 0 1 0 : 3 min.
Page 363 WSW45 ( Speeding up scanning-2) Selector Function Setting and Specifications No. 1 2 3 0 0 0 : No automatic drawing-in 0 0 1 : 1 sec. Delay time from when 0 1 0 : 2 sec. documents are set until the 0 1 1 : 3 sec.
Page 364 WSW46 (Monitor of power ON/OFF state and parallel port kept at high) Selector Function Setting and Specifications No. 1 2 0 0 : Disable Monitoring the PC ON/OFF 0 1 : Monitor SELECT IN state 1 0 : Monitor STROBE (Not used.) 1 1 : Monitor both SELECT IN and...
Page 365 WSW47 (Switching between high- and full-speed USB) Selector Function Setting and Specifications Handling paper at the 0: Eject paper w/o print 1: Print on the current occurrence of a paper feed paper timing error Not used. No. 3 4 Delay of FAX line 0 0 : 200 ms disconnection when switching to 0 1 : 400 ms...
Page 366 WSW48 (USB setup latency) Selector Function Setting and Specifications Not used. No. 6 7 8 0 0 0 : Default period 0 0 1 : Shorter 1 0 1 0 : Longer 1 0 1 1 : Longer 2 USB setup latency 1 0 0 : Longer 3 1 0 1 : Longer 4 1 0 0 : Shorter 2...
Page 367 WSW50 (SDAA settings) Selector Function Setting and Specifications No. 1 2 Percentage voltage for 0 0 : 80% interpreting the external telephone as being hooked up 0 1 : 90% (based on the network's standard 1 0 : 70% voltage) 1 1 : No detection Apply the initial value specified by local DC mask curve table to be...
Page 368 WSW51 (Function setting 16) Selector Function Setting and Specifications Output of communications error 0: Enable 1: Disable report when transmission verification report is disabled CR motor control for reducing 0: Activate 1: Deactivate torque fluctuation Not used. Switching from ink near-empty to 0: Yes 1: No ink empty when opening the scanner...
Page 369 WSW52 Selector Function Setting and Specifications Not used. WSW53 (Function setting 18) Selector Function Setting and Specifications Not used. CNG detection retry after detection 0: Yes 1: No of invalid CNG Not used. Confidential App. 4-54...
Page 370 MFC820CW MFC640CW DCP340CW Appendix 5. Wiring Diagrams This appendix provides the wiring diagrams that help you understand the connections between PCBs. Confidential...
Page 371 MFC640CW/DCP340CW Head PCB WLAN PCB Ink cartridge PCB Maintenance ADF unit Carriage PCB unit MFC640CW LINE CN20-2 CN1-2 MJ PCB CN18-2 CN3-2 +30V +30V Media 1 RDPS SM/xD /MS/SD Media 2 CN19-2 VOUT2 Speaker VOUT1 Main PCB MFC640CW CN11-6 CN1-6...
Page 372 Head PCB WLAN PCB Ink cartridge PCB Maintenance ADF unit Carriage PCB unit LINE CN20-2 CN1-2 MJ PCB CN18-2 CN3-2 +30V +30V RDPS Media 1 SM/xD /MS/SD CN19-2 VOUT2 Speaker VOUT1 CN2-10 CN12-5 CN11-15 Media 2 SDIN PIN0 KOUT5 KOUT0 Main PCB LED0 KOUT1...
Page 373 MFC820CW MFC640CW DCP340CW Appendix 6. Circuit Diagrams This appendix provides the circuit diagrams of the MJ PCB and power supply PCB. A. MJ PCB (U.S.A., Canadian and Asian models except DCP340CW) MJ PCB (European models except DCP340CW) B. Power supply PCB (U.S.A. and Canadian models)
Page 374 A. MJ PCB (U.S.A., Canadian and Asian models except DCP340CW) MAIN Line SDAA L1 DRL-0033PF DRL-0033PF R41-4910-C DL-6503C B2B-PH-K-E 1 La 2 Lb C682 C153 DL-6503C C473 C153 C102 DL-6503C TLP629 A5X-G-24E MJ-62J-RD315 ATXD204(TXD2-24V) +30V 1SS120 2 EXT 1 +30V +30V B2B-PH-K-K 2 S0V...
Page 375 A. MJ PCB (European models except DCP340CW) MAIN Line SDAA L1 DRL-0033PF DRL-0033PF R41-4910-C DL-6503C B2B-PH-K-E 1 La 2 Lb C682 C153 C473 C153 DL-6503C C102 DL-6503C TLP629 A5X-G-24E MJ-62J-RD315 ATXD204(TXD2-24V) +30V 1SS120 2 EXT 1 +30V +30V B2B-PH-K-K 2 S0V 1 POL B2B-PH-K-Y to Main PCB...
Page 376 B. Power Supply PCB (U.S.A. and Canadian models) Confidential...
Page 377 B. Power Supply PCB (European, Asian and Oceanian models) Confidential...
Page 378 When installing the printer driver, the installer logs events that occur during the installation process in the event log file. This appendix views a sample of the event log file. Selecting Start | Program | Brother | MFL-Pro Suite model name | Installation Diagnostics reads out the event log file. Confidential...
Page 379 [00325217] 040000 INF: INIDATA LPTID = LPTENUM\BrotherMFC-5840CN85F4 *11 USB connection also requires LPTID [00325217] 040000 INF: INIDATA PRTNAME = Brother MFC-5840CN USB Printer *12 Printer Driver Name [00325217] 040000 INF: INIDATA SCNNAME = Brother MFC-5840CN USB *13 Scanner Driver Name...
Page 380 [00325217] 040000 INF: ----- Printer Driver Check Start ----- [00325217] 040000 INF: PARAM MODEL NAME MFC-5840CN *19 Installation Check Detail [00325217] 040000 INF: PARAM CMP PRINTER NAME Brother MFC-5840CN USB Printer *20 Printer Driver Installation Check [00325217] 040000 INF: PARAM INTERFACE [00325217] 040000 INF: PARAM PRINTER ID...
Page 381 [00328181] 040000 INF: ----- Printer Connect Check Start ----- [00328181] 040000 INF: PARAM MODEL NAME MFC-5840CN [00328181] 040000 INF: PARAM CMP PRINTER NAME Brother MFC-5840CN USB Printer [00328181] 040000 INF: PARAM INTERFACE *35 Printer Driver Communication Check [00328181] 040000 INF: PARAM PRINTER ID 7&19fa3abd&0&USB006...
Page 382 [00334049] 040000 INF: Port1: Dev2 = Brother MFC-5840CN USB (A connected device can be indicated including other company's products) [00334049] 040000 INF: Port1: Dev3 = Brother MFC-5840CN USB Remote Setup Port (COM5) *52 If another device is connected to USB Port2, it is also indicated.
Page 383 [00341109] 040000 INF: ----- Process Information Start ----- [00341109] 010000 ERR: Process1= [00341109] 010000 ERR: Process2= [00341109] 010000 ERR: Process3=\SystemRoot\System32\smss.exe [00341109] 010000 ERR: Process4= [00341109] 010000 ERR: Process5=\??\C:\WINNT\system32\winlogon.exe [00341109] 010000 ERR: Process6=C:\WINNT\system32\services.exe [00341109] 010000 ERR: Process7=C:\WINNT\system32\lsass.exe [00341109] 010000 ERR: Process8=C:\WINNT\system32\svchost.exe *56 Process Information which is running [00341109] 010000 ERR: Process9=C:\WINNT\system32\spoolsv.exe ! If you failed to install and virus checker was running, displace it.
Page 384 [00220787] 040000 INF: INIDATA LPTID = LPTENUM\BrotherMFC-5840CN85F4 *11 USB connection also requires LPTID [00220787] 040000 INF: INIDATA PRTNAME = Brother MFC-5840CN USB Printer *12 Printer Driver Name [00220787] 040000 INF: INIDATA SCNNAME = Brother MFC-5840CN USB *13 Scanner Driver Name...
Page 385 [00220837] 040000 INF: ----- Printer Driver Check Start ----- [00220847] 040000 INF: PARAM MODEL NAME MFC-5840CN [00220847] 040000 INF: PARAM CMP PRINTER NAME Brother MFC-5840CN USB Printer *19 Installation Check Detail [00220847] 040000 INF: PARAM INTERFACE *20 Printer Driver Installation Check...
Page 386 [00221679] 040000 INF: AddRemove Display Name: DisplayName5 = Microsoft Office 2000 Premium *55 Add/Remove Application Information [00221679] 040000 INF: AddRemove Display Name: DisplayName6 = Brother MFL-Pro Suite [00221679] 040000 INF: AddRemove Display Name: DisplayName7 = Brother Drivers [00221679] 040000 INF: AddRemove Display Name: DisplayName8...
Page 387 [00242088] 040000 INF: ----- Installation Diagnostics Result Start ----- *59 Installation Diagnostics Result (OK / NG(Installation) / NG(Communication) [00242088] 010000 ERR: PRT = NG (Communication) *60 Printer Driver Installation Failure ( CANNOT Communicate) [00242088] 010000 ERR: PRT_INST = OK *61 Printer Driver Installation Result [00242088] 010000 ERR: PRT_PORT = USB006 *62 Printer Driver Port...
Page 388 [00622414] 040000 INF: INIDATA LPTID = LPTENUM\BrotherMFC-5840CN85F5 *11 USB connection also requires LPTID [00622414] 040000 INF: INIDATA PRTNAME = Brother MFC-5555840CN USB Printer *12 Printer Driver Name [00622414] 040000 INF: INIDATA SCNNAME = Brother MFC-5555840CN USB *13 Scanner Driver Name...
Page 389 [00622424] 040000 INF: ----- Printer Driver Check Start ----- [00622424] 040000 INF: PARAM MODEL NAME MFC-5850CN *19 Installation Check Detail [00622424] 040000 INF: PARAM CMP PRINTER NAME Brother MFC-5555840CN USB Printer *20 Printer Driver Installation Check [00622424] 040000 INF: PARAM INTERFACE [00622424] 040000 INF: PARAM PRINTER ID...
Page 390 [00624216] 040000 INF: AddRemove Display Name: DisplayName5 = Microsoft Office 2000 Premium *55 Add/Remove Application Information [00624216] 040000 INF: AddRemove Display Name: DisplayName6 = Brother MFL-Pro Suite [00624216] 040000 INF: AddRemove Display Name: DisplayName7 = Brother Drivers [00624216] 040000 INF: AddRemove Display Name: DisplayName8...
Page 391 [00318407] 040000 INF: INIDATA USBID [00318407] 040000 INF: INIDATA LPTID *11 USB connection also requires LPTID [00318407] 040000 INF: INIDATA PRTNAME = Brother MFC-5840CN Printer *12 Printer Driver Name [00318407] 040000 INF: INIDATA SCNNAME = Brother MFC-5840CN LAN *13 Scanner Driver Name...
Page 392 [00326909] 040000 INF: Get ScannerName = Brother MFC-5840CN LAN [00328501] 040000 INF: GetDefaultTwds() Result = 0 [00328501] 040000 INF: Get DefaultDS = TWAIN_32 Brother MFL Pro Scanner [00329332] 040000 INF: GetPortName() Result = 0 [00329332] 040000 INF: Get PortName = AUTO...
Page 393 [00332827] 040000 INF: ----- FAXTX Driver Check Start ----- [00332827] 040000 INF: PARAM MODEL NAME PC-FAX *25 FAX(Tx) Driver Installation Check [00332827] 040000 INF: PARAM CMP PRINTER NAME Brother PC-FAX #4 [00332827] 040000 INF: PARAM INTERFACE [00332827] 040000 INF: PARAM PRINTER ID [00332827] 040000 INF: PARAM MODE...
Page 394 [00339036] 040000 INF: AddRemove Display Name: DisplayName5 = Microsoft Office 2000 Premium *55 Add/Remove Application Information [00339036] 040000 INF: AddRemove Display Name: DisplayName6 = Brother MFL-Pro Suite [00339036] 040000 INF: AddRemove Display Name: DisplayName7 = Brother Drivers [00339036] 040000 INF: AddRemove Display Name: DisplayName8...
Page 395 [00345566] 040000 INF: ----- Process Information Start ----- [00345566] 010000 ERR: Process1= [00345566] 010000 ERR: Process2= [00345566] 010000 ERR: Process3=\SystemRoot\System32\smss.exe [00345566] 010000 ERR: Process4= [00345566] 010000 ERR: Process5=\??\C:\WINNT\system32\winlogon.exe [00345566] 010000 ERR: Process6=C:\WINNT\system32\services.exe [00345566] 010000 ERR: Process7=C:\WINNT\system32\lsass.exe [00345566] 010000 ERR: Process8=C:\WINNT\system32\svchost.exe *56 Process Information which is running [00345566] 010000 ERR: Process9=C:\WINNT\system32\spoolsv.exe ! If you failed to install and virus checker was running, quit the software.
Page 396 *11 USB connection also requires LPTID [03635316] 040000 INF: INIDATA LPTID *12 Printer Driver Name [03635316] 040000 INF: INIDATA PRTNAME = Brother MFC-5840CN Printer *13 Scanner Driver Name [03635316] 040000 INF: INIDATA SCNNAME = Brother MFC-5840CN LAN *14 PC-FAX Sending Driver Name...
Page 397 [03635336] 040000 INF: LAN PRINTER PORT NAME = BRN_6007C0 [03635336] 040000 INF: PARAM MODEL NAME MFC-5840CN [03635336] 040000 INF: PARAM CMP PRINTER NAME Brother MFC-5840CN Printer [03635336] 040000 INF: PARAM INTERFACE [03635336] 040000 INF: PARAM PRINTER ID [03635336] 040000 INF: PARAM MODE...
Page 398 [03670567] 040000 INF: PARAM CMP PRINTER NAME Brother MFC-5840CN Printer [03670567] 040000 INF: PARAM INTERFACE [03670567] 040000 INF: PARAM PRINTER ID [03670567] 040000 INF: PARAM MODE [03670567] 040000 INF: ----- Network Port Check Start ----- [03670567] 040000 INF: NETWORK PORT CHECK...
Page 399 [03704906] 040000 INF: Get ScannerName = Brother MFC-5840CN LAN [03706498] 040000 INF: GetDefaultTwds() Result = 0 [03706498] 040000 INF: Get DefaultDS = TWAIN_32 Brother MFL Pro Scanner [03707309] 040000 INF: GetPortName() Result = 0 [03707309] 040000 INF: Get PortName = AUTO...
Page 400 [03751863] 040000 INF: Get ScannerName = Brother MFC-5840CN LAN [03753476] 040000 INF: GetDefaultTwds() Result = 0 [03753476] 040000 INF: Get DefaultDS = TWAIN_32 Brother MFL Pro Scanner [03754297] 040000 INF: GetPortName() Result = 0 [03754297] 040000 INF: Get PortName = AUTO...
Page 401 [03801815] 040000 INF: ----- Fax Port Check End ----- and attempting again. [03806822] 040000 INF: PARAM MODEL NAME PC-FAX [03806822] 040000 INF: PARAM CMP PRINTER NAME Brother PC-FAX #5 [03806822] 040000 INF: PARAM INTERFACE [03806822] 040000 INF: PARAM PRINTER ID [03806822] 040000 INF: PARAM MODE...
Page 402 [03830987] 010000 ERR: Cannot Get IP Address (ErrCode = 11001) [03830987] 010000 ERR: CheckNetwork() Error: Port Name iligal.(Time = 12) [03833000] 010000 ERR: Cannot Get IP Address (ErrCode = 11001) [03833000] 010000 ERR: CheckNetwork() Error: Port Name iligal.(Time = 13) [03835013] 010000 ERR: Cannot Get IP Address (ErrCode = 11001) [03835013] 010000 ERR: CheckNetwork() Error: Port Name iligal.(Time = 14) [03837016] 040000 INF: PORT CHECK = NG...
Page 403 [03839179] 040000 INF: AddRemove Display Name: DisplayName5 = Microsoft Office 2000 Premium [03839179] 040000 INF: AddRemove Display Name: DisplayName6 = Brother MFL-Pro Suite [03839179] 040000 INF: AddRemove Display Name: DisplayName7 = Brother Drivers [03839179] 040000 INF: AddRemove Display Name: DisplayName8...
Page 404 [03852358] 040000 INF: ----- Installation Diagnostics Result Start ----- *59 Installation Diagnostics Result (OK / NG(Installation) / NG(Communication) [03852358] 010000 ERR: PRT = NG (Communication) *60 Printer Driver Installation Failure ( cannot communicate ) [03852358] 010000 ERR: PRT_INST = OK *61 Scanner Driver Installation Result [03852358] 010000 ERR: PRT_PORT = BRN_6007C0...
Page 405 Scanner Error Code Define name Error Code Contents SCDIAG_OK The processing is completed or confirmation is successful. SCDIAG_FAIL The system stopped processing due to errors which don't fall into ones above, such as the lack of memory. SCDIAG_NOT_INITIALIZE The system tried to run functions without the initialization processing. SCDIAG_NOT_SUPPORT This Scanner driver type doesn't support the function which is tried to run, This confirmation of the function is not necessary.
Page 406 August '05 SM-FAX046 8CA817 Printed in Japan Confidential...

This manual is also suitable for:

Dcp340cw Mfc820cw

Brother MFC640CW Service Manual

Chapter 2 Specifications

Specifications List

Chapter 3 Theory of Operation

Overview

Mechanical Components

Control Electronics

Chapter 5 Disassembly/Reassembly and Lubrication

Disassembly/Reassembly

Lubrication

Chapter 6 Adjustments and Updating of Settings

Preparation

If You Replace the Head/Carriage Unit or Engine Unit

If You Replace the Main Pcb

Chapter 8 Maintenance M Ode

Entry into the Maintenance Mode

List of Maintenance-Mode Functions

User-Access to the Maintenance Mode

Detailed Description of Maintenance-Mode Functions

Chapter 9 Error Indication and Troubleshooting

Error Indication

Quick Links

SERVICE MANUAL

Troubleshooting

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Summary of Contents for Brother MFC640CW

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