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Brother HL-7050 Service Manual

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  • Page 11 CLASS 1LASER PRODUCT APPAREIL Å LASER DE CLASSE 1 LASER KLASSE 1 PRODUKT...
  • Page 13 DANGER GEFAHR DANGER VARNING FARE ATTENTIE FARE iPELIGRO! VAROITUS...
  • Page 14 WARNING Indicates warnings that must be observed to prevent possible personal injury. CAUTION: WARNING Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. WARNING Some parts inside the printer are extremely hot immediately after the printer is used. When opening the front cover or rear cover to access any parts inside the printer, never touch the red colored parts shown in the following figures.

  • Page 15: Chapter 1 General

    HL-7050 SERVICE MANUAL CHAPTER 1 GENERAL FEATURES This printer has the following features; High Resolution and Fast Print Speed True 1200 X 1200 dots per inch (dpi), 600 x 600 dots per inch (dpi) and true 300 x 300 dots per inch (dpi) for graphics with microfine toner and up to 28 pages per minutes (ppm) print speed (A4) and 30 pages per minutes (ppm) print speed (Letter paper).
  • Page 16 The printer also supports auto-emulation switching between HP, Brother BR-Script 3, HP-GL and Epson or HP, BR-Script 3, HP-GL and IBM. If you want to set the printer emulation, you can do it by operating the front panel.
  • Page 17 HL-7050 SERVICE MANUAL OVERVIEW <Front View> Face down output tray Extension flap Control panel Top cover Multi-purpose tray Multi-purpose extension flap Upper paper cassette (Tray 1) Fig. 1-1 <Rear View> Face up output tray Parallel interface connector USB connector Serial interface connector...
  • Page 18 CHAPTER 1 GENERAL SPECIFICATIONS Printing Print method Electrophotography (single-component dry toner) Laser Semiconductor laser Wave length: 788 nm Output: 15mW max ® ® ® Resolution 1200dpi (for Windows 95/98/Me, WindowsNT 4.0, Windows 2000 ® Windows XP and Mac OS) ® ®...
  • Page 19 HL-7050 SERVICE MANUAL Functions Toshiba TMPR4955 266MHz Emulation Brother Printing Solution for Windows Automatic emulation selection among HP LaserJet 5(PCL 6), Brother BR-Script 3, HP-GL, EPSON FX-850 or IBM Proprinter XL Printer driver <PCL Driver> Windows 95/98/Me, Windows NT 4.0/2000/XP driver, supporting Brother Native Compression mode <PS Driver>...
  • Page 20 CHAPTER 1 GENERAL Electrical and Mechanical Power source U.S.A. and Canada: AC 110 to 120V, 50 Hz/60 Hz Europe and Australia: AC 220 to 240V, 50 Hz/60 Hz Power consumption Printing (average): 690 W or less (when printing plain paper at 25°C) Standing by: 110 W or less (at 25°C)
  • Page 21 HL-7050 SERVICE MANUAL Network Type / Speed Ethernet 10BaseT/100BaseTX Print server (NC-4100h) Auto speed detection Protocols TCP/IP (DHCP, BOOTP, RARP, APIPA, NetBIOS over IP LPR/LPD, Port9100, Custom Port, POP3/SMTP, SMB Print TELNET, SNMP, HTTP, TFTP, FTP, IPP, SSDP), EtherTalk, IPX/SPX, DEC LAT, Banyan VINES, NetBEUI, DLC/LLC...
  • Page 22 CHAPTER 1 GENERAL Paper 3.6.1 Feedable paper We recommend the following paper types and sizes for each paper tray or print method. (1) Paper type Select the Tray 1 MP tray Tray 2/3/4 media type Paper type 60- 105 g/m 60- 200 g/m 60- 105 g/m 60- 105 g/m...
  • Page 23 HL-7050 SERVICE MANUAL (2) Paper size Tray 1 MP tray Tray 2/3/4 A4, Letter, A4, Letter, Legal, A4, Letter, A4, Letter, A4, Letter, Legal, B5(JIS), B5(ISO), Legal, Legal, B5(JIS), B5(JIS), Executive, A5, A6, B5(JIS), B5(JIS) B5(ISO), B5(ISO), B6, COM-10, B5(ISO),...
  • Page 24 CHAPTER 1 GENERAL (4) Recommended paper Europe Plain paper * Xerox Premier 80 g/m Xerox 4200DP 20 lb. Transparency 3M CG3300 3M CG3300 Label Avery laser label L7163 Avery laser label #5160 * Recommended paper should have the following technical specifications: Basis Wait 75-90 (g/m Thickness 80-110 (micrometer) Roughness Higher than 20 (sec.)
  • Page 25 HL-7050 SERVICE MANUAL CAUTION: When you are choosing print media, be sure to follow the information given below to prevent any paper jams, print quality problems or printer damage; It is recommended to use long-grained paper for the best print quality. If short-grained paper is being used, it might be the cause of paper jams.
  • Page 26 CHAPTER 1 GENERAL (3) We recommend the following print methods (output tray) for each paper type. Paper output Paper type Notes Face down Face up Plain paper 70g/m to 90 g/m (19 to 24Ib.) Thin paper 60g/m to 70 g/m (16 to 19Ib.) Recycled paper Rough paper –...
  • Page 27 HL-7050 SERVICE MANUAL Printable Area 3.7.1 PCL5e/EPSON/IBM emulation The figure below shows the printable area each emulation guarantees when printing on Portrait and Landscape. 1-13...
  • Page 28 CHAPTER 1 GENERAL The table below shows the printable areas when printing on Portrait for each paper size. Size 215.9 mm 279.4 mm 203.2 mm 279.4 mm 6.35 mm 4.2 mm 8.5” 11.0” 8.0” 11.0” 0.25” 0 mm 0.16” Letter (2,550 dots) (3,300 dots) (2,400 dots)
  • Page 29 HL-7050 SERVICE MANUAL 1-15...
  • Page 30 CHAPTER 1 GENERAL The table below shows the printable areas when printing on Landscape for each paper size. Size 279.4 mm 215.9 mm 269.3 mm 215.9 mm 5.0 mm 4.2 mm 11.0” 8.5” 10.6” 8.5” 0.2” 0 mm 0.16” Letter (3,300 dots) (2,550 dots) (3,180 dots)

  • Page 31: Chapter 2 Installation And Basic Operation

    HL-7050 SERVICE MANUAL CHAPTER 2 INSTALLATION AND BASIC OPERATION CONDITIONS REQUIRED FOR INSTALLATION Power Supply The source voltage must stay within ±10% of the rated voltage shown on the rating plate. The power cord, including extensions, should not exceed 3 meters (10 feet).
  • Page 32 CHAPTER 2 INSTALLATION AND BASIC OPERATION System Requirements for Brother Printer Solution for Windows Check the following system requirements to setup and operate the printer using Brother Printing Solution for Windows : Operating system Computer / Processor Memory 486DX / 66MHz or higher processor...
  • Page 33 HL-7050 SERVICE MANUAL UNPACKING When unpacking the printer, check to see that all of the following components are included in the carton. Drum Unit Assembly (Drum Unit with Toner Cartridge) AC cord Printer CD-ROM Paper Cassette Setup Guide Fig. 2-1 NOTE: Components may vary depending on the country.
  • Page 34 4.0/2000/XP, Macintosh OS versions from 8.6 to 9.2 or Mac OS X 10.1). Then, buy the appropriate interface cable (parallel, USB or network) for the computer. When printing from a Macintosh computer, connect it to the printer via a Network (Brother recommends using the NC-4100h network board).
  • Page 35 HL-7050 SERVICE MANUAL 3.1.1 Remove the protective parts (1) Open the top cover of the printer. (2) Remove the protective parts from the printer. (3) Close the top cover of the printer. (4) Pull out the paper tray, and then remove the tape.
  • Page 36 CHAPTER 2 INSTALLATION AND BASIC OPERATION (4) Put the drum unit assembly into the printer. Fig.2-6 (5) Close the top cover of the printer. Fig.2-7 3.1.3 Load paper in the paper tray (1) Pull the paper tray out of the printer. (2) While pressing the paper guide release lever, slide the adjusters to fit the paper width size.
  • Page 37 HL-7050 SERVICE MANUAL NOTE: For legal size paper, press the universal guide release button and pull out the rear of the paper tray. Universal guide release button Fig. 2-9 (3) Load paper in the paper tray. Check that the paper is flat in the tray and below the maximum paper mark.
  • Page 38 CHAPTER 2 INSTALLATION AND BASIC OPERATION 3.1.4 Print a test page (1) Make sure the printer power switch is off. Connect the AC power cord to the printer. Do NOT connect the interface cable. Fig. 2-10 (2) Plug the AC power cord into an AC outlet, and then turn on the power switch. (3) After the printer has finished warming up, the READY message appears on the LCD display of the control panel.
  • Page 39 HL-7050 SERVICE MANUAL (5) Click “Install Software” icon on the Menu screen. Fig. 2-11 (6) Click “Printer Driver”. Fig. 2-12 (7) Click the Next button. Follow the instructions on the screen. Fig. 2-13 (8) Select “Standard Installation”, and then click the Next button.
  • Page 40 CHAPTER 2 INSTALLATION AND BASIC OPERATION (9) Select “Local Printer”, and then click the Next button. Fig. 2-15 (10) Select the port where your printer is connected, and then click the Next button. Fig. 2-16 (11) Click the Finish button to restart your PC. Fig.
  • Page 41 HL-7050 SERVICE MANUAL For USB Interface Cable Users (for Windows users only) Follow the steps below only after completing steps 3.1.1 through to 3.1.4 above. 3.3.1 Install the driver & connect the printer to your PC NOTE: If the “Found New Hardware Wizard” appears on your PC, click the Cancel button.
  • Page 42 ® For Windows 2000/XP Users only (1) Click Start and Printers and Faxes. Fig.2-19 (2) Select the Brother HL-7050 (Copy2) icon. Fig.2-20 (3) Click the File menu, and then select Set as Default printer. *The setup is now complete. 3.3.3 Installing the Driver (For Mac OS 8.6 to 9.2 Users)
  • Page 43 HL-7050 SERVICE MANUAL (9) Select Printer (USB), and then click the OK button. (10) Click the Change…button in PostScript Printer Description (PPD) file. Select Brother HL- 7050 series, and then click the Select button. (11) Click the Change…button in USB Printer Selection. Select HL-7050 series, and then click the OK button.
  • Page 44 Driver Development Wizard: Useful utility for peer-to-peer users Use the Brother Driver Development Wizard software to automate the installation of Brother networked printers in a TCP/IP environment. The Wizard can create an Executable file that can be sent to other network users, when run, the Executable file installs the appropriate printer driver and network printing software.
  • Page 45 HL-7050 SERVICE MANUAL © 3.4.2. Installing the driver for Windows users only (1) Turn off the printer power switch. (2) Connect the network interface cable to the printer, and then connect it to a free port on your hub. (3) Turn on the printer power switch.
  • Page 46 CHAPTER 2 INSTALLATION AND BASIC OPERATION For Brother Peer-to-Peer network printer users (LPR-recommended Peer-to-Peer printing method) Select Brother Peer-to-Peer Network Printer”, and then click the Next button. Select “Search from a list of available printers” or enter your printer IP address. Click the Next button.
  • Page 47 After your PC has restarted, setup will be complete. For Brother Peer-to-Peer network printer users (NetBIOS) (1) Select “Brother Peer-to-Peer Network Printer”, and then click the Next button. (2) Select “Search from a list of available printers” or enter your printer IP address. Click the Next button.
  • Page 48 CHAPTER 2 INSTALLATION AND BASIC OPERATION For Mac OS X 10.1 Users Insert the CD-ROM into the CD-ROM drive. Open the Mac OS X folder. Double-click the PPD_Installer.pkg icon. Follow the instruction on the screen. Open the Macintosh HD icon. Open the Applications folder.

  • Page 49: Printing Methods

    HL-7050 SERVICE MANUAL PRINTING METHODS The printer provides two types of printing method; printing from paper tray and printing form the multi-purpose (MP) tray, Printing from the Paper Tray (Face down printing) Plain paper, recycled paper or transparencies can be loaded into the paper tray. If paper is loaded into the paper tray, the printer automatically feeds paper sheet by sheet and ejects the printed page into the output tray.
  • Page 50 CHAPTER 2 INSTALLATION AND BASIC OPERATION Tray ID setting (Only if the lower tray unit is installed) If someone moves the paper tray into another tray position and even if the data is still printed without knowing this has been done, the driver automatically selects the correct tray and prints according to this setting.
  • Page 51 HL-7050 SERVICE MANUAL Pull out the MP extension flap. Fig. 2-28 When loading paper in the MP tray, make sure it touches the back of the tray and remains below the limit mark. Fig. 2-29 NOTE: Make sure that the neatly stacked paper is correctly seated on the MP tray, otherwise paper may not be fed correctly, resulting in a skewed printout or a paper jam.
  • Page 52 CHAPTER 2 INSTALLATION AND BASIC OPERATION Printing on Envelopes (Face up printing) Use of any of the envelopes listed below may cause damage to your printer. Such damage is not covered under any warranty or service agreement. Envelopes that are damaged, curled, wrinkled, or irregularly shaped Envelopes that are extremely shiny or highly textured Envelopes with clasps, snaps or tie strings Envelopes with self-adhesive closures...
  • Page 53 HL-7050 SERVICE MANUAL Pull out the MP tray support flap. Fig. 2-32 Open the face up output tray. Fig. 2-33 Pull out the face up output tray support if necessary. Fig. 2-34 Push down the two blue tabs at the left and right hand sides.
  • Page 54 CHAPTER 2 INSTALLATION AND BASIC OPERATION Place the envelopes in the MP tray so they touch the back of the tray and remain below the limit mark. Fig. 2-36 Press and slide the paper width adjuster to fit the envelope size. Fig.
  • Page 55 HL-7050 SERVICE MANUAL <PS driver> Fig. 2-39 Fig. 2-40 NOTE: When you have finished printing your envelopes, close the face-up output tray to reset the two blue tabs automatically. To reset the blue tabs manually, push the blue tabs back to their original position.
  • Page 56 CHAPTER 2 INSTALLATION AND BASIC OPERATION Most envelopes will perform acceptably on the HL-7050 printer. However, some envelopes will have feed and print quality problems because of their construction. A suitable envelope should have edges with straight, well creased folds and should not have more than two thicknesses of paper along the leading edge.
  • Page 57 HL-7050 SERVICE MANUAL Pull out the MP tray extension flap. Fig.2-42 Open the face up output tray. Fig.2-43 Pull out the face up output tray extension. Fig.2-44 When loading paper in the MP tray, make sure it touches the back of the tray and remains below the limit mark.
  • Page 58 CHAPTER 2 INSTALLATION AND BASIC OPERATION While pressing the paper guide release lever, slide the adjuster to fit the paper size. Fig.2-46 CAUTION: Do not touch transparencies that have just been printed because they are very HOT. NOTE: When placing paper in the MP tray, note the following: When printing, the inside tray automatically rises to feed paper into the printer.
  • Page 59 HL-7050 SERVICE MANUAL Change the settings in the printer driver. Fig. 2-47 Fig. 2-48 Fig. 2-49 2-29...
  • Page 60 CHAPTER 2 INSTALLATION AND BASIC OPERATION Printing to the Face up Output Tray (Face up printing) When the face up output tray is open, the printer has a straight paper path from the paper tray or MP tray through to the back of the printer. Use this output method when you want to print on special media that is thick or should not be bent, such as thick paper, labels, card stock or envelopes.
  • Page 61 HL-7050 SERVICE MANUAL CONTROL PANEL OPERATION There is one LED and 7 buttons on the control panel. The LED and LCD display indicate the printer status, and pressing the buttons enables several functions in the printer. The display also shows the current printer status. When you use the control panel buttons, the display will change.
  • Page 62 CHAPTER 2 INSTALLATION AND BASIC OPERATION Panel Buttons Functions 7 control panel buttons (Go, Cancel, Reprint, +, -, and Back) enable to control the basic printer operations and change various printer settings. Function Exit from the control panel menu. Reprint settings and Error messages. Pause / Continue printing.
  • Page 63 HL-7050 SERVICE MANUAL 5.2.3 Reprint button Pressing the Reprint button enables to reprint a document that has just been printed. Also, by simply spooling a document to a non-secure area of the printer, the document can be shared with colleagues.
  • Page 64 CHAPTER 2 INSTALLATION AND BASIC OPERATION Reprint the last job 3 times 1. Set the REPRINT menu ON with SETUP mode using the control panel. NOTE: If you print using the driver supplied with the printer, the settings for Job Spooling in the printer driver will take priority over the settings made on the control panel.
  • Page 65 HL-7050 SERVICE MANUAL (2) Printing PROOF data You can use this function to reprint PROOF data that has just been printed and has no security settings. Documents that are placed in the PROOF area are available to anyone. This function can also be used for a document that will be moved to a public folder at a later date.
  • Page 66 CHAPTER 2 INSTALLATION AND BASIC OPERATION Operations for printing SECURE data If there is no data. NO DATA STORED Press the Reprint button. --REPRINT-- LAST JOB Press + or - --REPRINT-- SECURE FILE Press Set button. SECURE FILE USER XXXXXX Press the + or –...
  • Page 67 HL-7050 SERVICE MANUAL To cancel the reprint job Pressing the Job Cancel button allows you to cancel the current reprint job. The Job Cancel button also allows you to cancel a paused reprint job. 5.2.4 + & - button If you press the + or – button when the printer is in the on-line state (READY), it goes off-line and the LCD displays the menu.
  • Page 68 CHAPTER 2 INSTALLATION AND BASIC OPERATION LCD Display The display shows the current printer status. When you use the control panel buttons, the display will change. If you take the printer off-line, the display changes to show the selected emulation. If any problems occur, the display shows the corresponding error message, maintenance message, or call service message to prompt you to take an action.
  • Page 69 Press the Set button to start printing. RESET TO FACTORY The printer setting returns to the factory setting. SETTING FAX SENDING Sending fax data (Fax function: see Brother Solutions Center: http://solutions.brother.com) FAX RECEIVING Receiving fax data (Fax function: see Brother Solutions Center: http://solutions.brother.com) How to Use the Control Panel The followings are the basic steps when operating the menu buttons;...
  • Page 70 CHAPTER 2 INSTALLATION AND BASIC OPERATION Example for operation: When turning the ‘MP FIRST’ setting ON NOTE: Choose this setting to load paper from the MP tray first. READY Press any of the menu buttons (+, –, Set or Back) to set the printer off- line.
  • Page 71 HL-7050 SERVICE MANUAL Control Panel Setting Menu There are 8 modes. For more information about the selections available for each mode, refer to the pages listed below. INFORMATION For more information, see subsection 5.5.1 ‘INFORMATION’ in this Chapter. PAPER For more information, see subsection 5.5.2 ‘PAPER’...
  • Page 72 CHAPTER 2 INSTALLATION AND BASIC OPERATION 5.5.1 Information Prints the print settings page. PRINT SETTINGS Prints the test page. PRINT TEST Prints the demonstration sheet. PRINT DEMO Prints the card list. PRINT FILE LIST Prints the font list and samples. PRINT FONTS Shows Printer serial number.
  • Page 73 HL-7050 SERVICE MANUAL 5.5.2 Paper =AUTO/MP TRAY/TRAY 1/TRAY 2/TRAY 3/TRAY 4 SOURCE Select which paper tray the paper will be fed from. =MP>T1>T2>T3>T4* PRIORITY MP>T4>T3>T2>T1 T1>T2>T3>T4>MP T4>T3>T2>T1>MP =ON/OFF MP FIRST Select whether to feed paper from the MP tray as a priority.
  • Page 74 CHAPTER 2 INSTALLATION AND BASIC OPERATION 5.5.4 Setup = ENGLISH /FRANÇAIS /… LANGUAGE PANEL CONTROL LOWER LCD =NONE/PAGE COUNTER/JOB NAME LCD DENSITY =1/2 AUTO ONLINE =ON/OFF BUTTON REPEAT Set the time for the display message to change when holding the + or – button at intervals of: 0.1, 0.2, 0.3, 0.4, 0.5, 1.0, 1.5 or 2.0 seconds.
  • Page 75 HL-7050 SERVICE MANUAL SETUP (continued) Delete the data in CompactFlash card or HDD. DELETE STORAGE SECURE FILE Select the user name, job name and password. PUBLIC FILE Select the user name and job name. PROOF FILE Select the user name and job name.
  • Page 76 CHAPTER 2 INSTALLATION AND BASIC OPERATION 5.5.5 Print menu =PLAIN PAPER/TRANSPARENCIES/THICK PAPER/THICKER PAPER/ MEDIA TYPE BOND PAPER/ENVELOPES/THIN PAPER Set the paper size to LETTER, LEGAL, A4, EXECUTIVE, COM-10, DL, JIS B5, PAPER B5, A5, B6, A6, MONARCH C5 and A4 LONG. You can check the total number of printed pages.
  • Page 77 HL-7050 SERVICE MANUAL PRINT MENU (continued) HP LASERJET =I000:#### FONT NO. =##.## FONT PITCH PC-8/… SYMBOL SET Set the symbol set or the character set. Print code table. TABLE PRINT =OFF/ON AUTO LF ON: CR CR+LF, OFF: CR CR =OFF/ON...
  • Page 78 CHAPTER 2 INSTALLATION AND BASIC OPERATION PRINT MENU (continued) EPSON FX-850 =I000:#### FONT NO. =##.## FONT PITCH PC-8/… CHARACTER SET Set the symbol set or the character set. Print code table. TABLE PRINT =OFF/ON AUTO LF ON: CR CR+LF OFF: CR CR =OFF/ON AUTO MASK Set the left margin at column 0 to 70 columns at...
  • Page 79 HL-7050 SERVICE MANUAL PRINT MENU (continued) IBM PROPRINTER =I000:#### FONT NO. =##.## FONT PITCH PC-8/… CHARACTER SET Set the symbol set or the character set. Print code table. TABLE PRINT =OFF/ON AUTO LF ON: CR CR+LF, OFF: CR CR =OFF/ON...
  • Page 80 CHAPTER 2 INSTALLATION AND BASIC OPERATION 5.5.6 Network (Only on a Network) TCP/IP =ON/OFF TCP/IP ENABLE ###.###.###.### IP ADDRESS= ###.###.###.### SUBNET MASK= ###.###.###.### GATEWAY= IP BOOT TRIES =AUTO/STATIC/RARP/BOOTP/DHCP IP METHOD =ON/OFF NETWARE NETWARE ENABLE =AUTO/8023/ENET/8022/SNAP NET FRAME =ON/OFF APPLETALK =ON/OFF NETBEUI =ON/OFF DLC/LLC...
  • Page 81 HL-7050 SERVICE MANUAL 5.5.7 Interface =AUTO/PARALLEL/RS-232C/USB/NETWORK SELECT = 1:99 (sec) AUTO IF TIME You need to set the time-out period for the auto interface selection. = Level1:15 RESTART PRINTER? INPUT BUFFER Increase or decrease the input buffer capacity. When using the parallel interface...
  • Page 82 CHAPTER 2 INSTALLATION AND BASIC OPERATION INTERFACE (continued) When using the serial interface RS-232C =OFF/ON RESTART PRINTER? FAX MODE Data transfer speed can be set to BAUDRATE 150/300/600/1200/2400/4800/9600/19200/3840 0/57600/115200 baud. =8 BITS/7 BITS CODETYPE The data length can be set to 7 or 8 bits. =NONE/ODD/EVEN PARITY The data error check can be set to NONE, ODD...
  • Page 83 HL-7050 SERVICE MANUAL 5.5.9 Set date and time --MENU-- INFORMATION Press the + or – button until “SETUP” mode appears. --MENU-- SETUP Press the Set button. SETUP DATE&TIME Press the Set button. DATE&TIME YEAR Press the Set button. YEAR =1999 Press the + button.
  • Page 84 CHAPTER 2 INSTALLATION AND BASIC OPERATION 5.5.10 Set IP address --MENU-- INFORMATION Press the + button. --MENU-- NETWORK Press the Set button. NETWORK TCP/IP Press the Set button. TCP/IP TCP/IP ENABLE Press the + button. TCP/IP IP ADDRESS= Press the Set button. IP ADDRESS= 192.0.0.192 The last digit in the first part of the number is blinking.
  • Page 85 HL-7050 SERVICE MANUAL 5.5.11 About emulation modes This printer has the following emulation modes. HP LaserJet Mode The HP LaserJet mode (or HP mode) is the emulation mode in which this printer emulates the Hewlett-Packard LaserJet laser printer. Many software applications support this type of laser printer.
  • Page 86 CHAPTER 2 INSTALLATION AND BASIC OPERATION 5.5.12 List of factory settings The following table shows the initial factory default settings. NOTE: The emulation mode affects the setting. Effective modes are shown in brackets in the following table. The following settings cannot be restored to the factory settings with the reset menu in the factory settings mode –...
  • Page 87 HL-7050 SERVICE MANUAL =ENGLISH SETUP LANGUAGE LOWER LCD=NONE PANEL CONTROL LCD DENSITY=1 AUTO ONLINE=ON BUTTON REPEAT=0.1 SEC MESSAGE SCROLL= LEVEL 1 LCD Density =30MIN POWER SAVE TIME CONTINUE TONER LOW =OFF AUTO CONTINUE =OFF LOCK PANEL REPRINT =AUTO PAGE PROTECTION...
  • Page 88 CHAPTER 2 INSTALLATION AND BASIC OPERATION =PLAIN PAPER PRINT MENU MEDIA TYPE =A4/LETTER PAPER COPIES =PORTRAIT ORIENTATION X OFFSET=0 PRINT POSITION Y OFFSET=0 AUTO FF TIME =OFF FF SUPPRESS FONT NO.=59 HP LASERJET FONT PITCH=10.00/12.00 SYMBOL SET=PC8 AUTO LF=OFF AUTO CR=OFF AUTO WRAP=OFF AUTO SKIP=ON 2-58...
  • Page 89 HL-7050 SERVICE MANUAL LEFT MARGIN=#### PRINT MENU HP LASERJET (continued) (continued) RIGHT MARGIN=#### TOP MARGIN=#### BOTTOM MARGIN=#### LINES=#### FONT NO.=59 EPSON FX-850 FONT PITCH/POINT=10.00/12.00 SYMBOL/CHARACTER SET=US ASCIF AUTO LF=OFF AUTO MASK=OFF LEFT MARGIN=#### RIGHT MARGIN=#### TOP MARGIN=#### BOTTOM MARGIN=#### LINES=#### FONT NO.=59...
  • Page 90 CHAPTER 2 INSTALLATION AND BASIC OPERATION TCP/IP ENABLE=ON NETWORK TCP/IP IP ADDRESS=192.0.0.192 SUBNET MASK=0.0.0.0 GATEWAY=0.0.0.0 IP BOOT TRIES=3 IP METHOD=AUTO NETWARE ENABLE = ON NETWARE NET FRAME = AUTO APPLETALK NETBEUI DLC/LLC BANYAN NETBIOS/IP =OFF APIPA =AUTO ENET =AUTO INTERFACE SELECT AUTO IF TIME =LEVEL 3...
  • Page 91 HL-7050 SERVICE MANUAL RING DELAY=0 INTERFACE RS-232C (continued) (continued) REDUCTION=AUTO RAM SIZE=1MB RECEIVE=ON INTERVAL=OFF 2-61...
  • Page 92 CHAPTER 2 INSTALLATION AND BASIC OPERATION Other Control Features The printer has the following useful features: 5.6.1 Sleep mode When the printer does not receive data for a certain period of time (timeout), it enters sleep mode. The default timeout is 5 minutes and it is automatically adjusted to the most suitable time-out setting depending on the frequency of your printer use (Intelligent Sleep Mode).
  • Page 93 HL-7050 SERVICE MANUAL NETWORK BOARD OPERATION (HL-7050N AND OPTION FOR HL-7050) Installing the network board enables you to use the printer in the TCP/IP, IPX/SPX, AppleTalk, DLC/LLC, Banyan VINES, DEC LAT and NetBEUI environments. Also, useful utilities such as BR-Admin32 and network printing software for the administrator are included. For more information about set up, see section 3.
  • Page 94 CHAPTER 2 INSTALLATION AND BASIC OPERATION (5) Insert the network board connector firmly into the connector of the main controller board, and then secure it with the two screws. Fig. 2-56 (6) Secure the metal plate with the three screws. Fig.
  • Page 95 HL-7050 SERVICE MANUAL Functions 6.2.1 LED functions A-LED (Green) F-LED (Orange) L-LED (Green) Fig. 2-59 L-LED (Green): Link activity This LED is on if there is a valid connection to the network (either 10BaseT or 100BaseTX). It is off if no network is detected.

  • Page 96: Theory Of Operation

    HL-7050 SERVICE MANUAL CHAPTER 3 THEORY OF OPERATION ELECTRONICS General Block Diagram Fig. 3-1 shows a general block diagram of the HL-7050/7050N printer. Optional Network Board Compact Flash Expansion (NC-4100h) memory Standard for HL-7050N (DIMM 2 slot) External Device Main PCB...
  • Page 97 CHAPTER 3 THEORY OF OPERATION Main PCB (Video Controller PCB) For the entire circuit diagram of the main PCB, see APPENDIX 2 to 10 ‘MAIN PCB CIRCUIT DIAGRAM, HL-7050’. 1.2.1 Outline The Main PCB consists of the circuits which perform the following functions; Receive the printing data from the computer.
  • Page 98 HL-2460 SERVICE MANUAL Main PCB Block Diagram +3.3v/+1.6v POWER +3.3v 66MHz(CPU,SDRAM) Regulator Clock Generator +3.3v +1.6v(For CPU) 33MHz(PCI) TXPR4955-266 PQ070XZ01Z C8750 48MHZ(USB,RS232C) CPU-Address/Data MultiBUS +5v/+3.3v +3.3v +3.3v IEEE1284 I/F SDRAM DIMM 128M x2 (100pin) (32MB) ASIC 2slots +3.3v 256MB MAX USB I/F CS,DQM MB87F4562...
  • Page 99 CHAPTER 3 THEORY OF OPERATION 1.2.2 Circuit (1) CPU block Model name: TXPR4955-266, MIPS 64bit RISC CPU manufactured by Toshiba Clock speed: 66.7 MHz (external) / 266 MHz (internal) Cache memory: 32KB (Command cache) / 32KB (Data cache) Bus width: 32 bit (external) / 64 bit (internal) Internal Floating Point Unit (FPU) Appearance: 160-pin QFP (2) ASIC block...
  • Page 100 HL-7050 SERVICE MANUAL (5) DRAM block DRAMs are used for the receiving buffer and the working area of the CPU. The DRAM block contains eight 128Mbit SDRAM, thus having 32MB memory capacity in total. Model name: K4S281632D-UC75 manufactured by SAMSUNG (or equivalent)
  • Page 101 CHAPTER 3 THEORY OF OPERATION Engine PCB The engine PCB controls the following parts by using signal data that the CPU (8 bit M38869) obtains through correspondence with the main PCB. The engine PCB also corresponds with the optional parts to give operational commands to the CPU. Main motor Cover open sensor Pre-registration sensor...
  • Page 102 INLET...
  • Page 103 CHAPTER 3 THEORY OF OPERATION 1.4.2 High-voltage power supply The high-voltage power supply generates and outputs the voltages and currents for the charging, development and transfer functions. Current 24V 11 Regulator 10HG 4 Transfer Roller Voltage DEV 5 Regulator Supply Cleaning Roller2 Roller Cleaning...
  • Page 105 CHAPTER 3 THEORY OF OPERATION Laser Unit LD PCB Network Cover Open Sensor Board Polygon Motor Back Light Toner Cartridge Tonor Sensor Main PCB High- Panel PCB Voltage Primary Charging Roller Power Supply Development Roller Transfer Roller Low-Voltage Power Supply Engine PCB Paper Feed Solenoid Fixing Unit...
  • Page 106 HL-7050 SERVICE MANUAL Paper Transfer 2.2.1 Paper supply The paper feed roller A picks up one sheet of paper from the paper cassette every time it is rotated and feeds it to paper feed roller B. Pressure roller Regist roller...
  • Page 107 CHAPTER 3 THEORY OF OPERATION 2.2.3 Paper eject After the printing image on the photosensitive drum is transferred onto the paper, the paper is then fed to the fixing unit to fix the unfixed toner onto the paper. Afterwards, the paper is ejected from the fixing unit by the first eject roller A in the fixing unit. The FU actuator detects whether the paper is ejected correctly or not.
  • Page 108 HL-7050 SERVICE MANUAL Sensors 2.3.1 Cover open sensor Detects opening and closing of the front cover. Cover open sensor Fig. 3-9 2.3.2 Multi paper tray paper empty sensor Detects if there is paper in the MP tray. Multi paper tray paper empty sensor MP tray unit Fig.
  • Page 109 CHAPTER 3 THEORY OF OPERATION 2.3.3 Tray paper empty sensor Detects if there is paper in the paper tray. Tray paper empty sensor Fig. 3-11 2.3.4 Face up open sensor / Fuser exit sensor Detects opening and closing of the back cover. It also detects if there is any jammed paper in the fixing unit.
  • Page 110 HL-7050 SERVICE MANUAL 2.3.5 Full stack sensor Detects if paper that is output onto the face down output tray exceeds 500 (For normal 80g/m paper). Full stack sensor Fig. 3-13 2.3.6 Eject sensor Detects if paper is ejected from the fixing unit.
  • Page 111 CHAPTER 3 THEORY OF OPERATION 2.3.7 Paper size sensor / Tray ID sensor Detects if the correct size of paper and the correct tray ID is selected. Paper size sensor & Tray ID sensor Fig. 3-15 2.3.8 Toner sensors Detects if there is toner in the toner cartridge. The toner sensor on the left side emits light through the window on the left side of the toner cartridge, then the toner sensor on the right side receives it when the toner is low.
  • Page 112 HL-7050 SERVICE MANUAL Drum Unit 2.4.1 Photosensitive drum Generates the latent electrostatic image and develops the image on the drum surface. 2.4.2 Primary charger Forms a uniform charge on the drum surface. (1) Corona wire Generates the ion charge on the drum.
  • Page 113 CHAPTER 3 THEORY OF OPERATION Print Process 2.6.1 Charging The drum is charged to approximately 975V by an ion charge, which is generated by the primary charger. The charge is generated by ionization of the corona wire, which has a DC bias from the high-voltage power supply applied to it.
  • Page 114 HL-7050 SERVICE MANUAL The area exposed to the laser beam is the image to be printed. The surface potential of the exposed area is reduced, forming the electrostatic image to be printed. 1 Cycle of drum Primary charging Laser beam exposure and developing...
  • Page 115 CHAPTER 3 THEORY OF OPERATION 2.6.3 Developing Developing causes the toner to be attracted to the electrostatic image on the drum so as to transform it into a visible image. The developer consists of a non-magnetic toner. The development roller is made of conductive rubber and the supply roller (which is also made of conductive sponge) rotate against each other.
  • Page 116 HL-7050 SERVICE MANUAL 2.6.5 Cleaning If the toner is not transferred onto the paper perfectly, it is possible that there may be residual toner and the paper dust on the photo-conductive drum. The residual toner is drawn to the cleaning roller by charging lower voltage compared to the electric potential of the drum surface.
  • Page 117 CHAPTER 3 THEORY OF OPERATION (1) Longitudinal cross-section of heat roller Gear Center thermistor Side thermistor Fig.3-23 (2) Longitudinal power distribution of heaters Side heater Center heater Fig.3-24 3-22...

  • Page 118: Safety Precautions

    CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY SAFETY PRECAUTIONS WARNING (1) Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. (2) Some parts inside the printer are extremely hot immediately after the printer is used.
  • Page 191 CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY (38) Remove the PE sensor actuator from the holes of the PE sensor holder by pulling the holder outwards in the direction of the arrows shown in the drawing below. (39) Remove the tray PE sensor PCB ASSY from the PE sensor holder by releasing the two hooks.
  • Page 192 3.27 Size SW PCB (1) Remove the two bind B tite 4x10 taptite screws from the frame on the left side of the printer and remove the tray guide right rear from the frame by inclining it in the direction of the arrow.
  • Page 193 CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY (3) Remove the cup S M3x6 Taptite screw from the outside of the frame, release the size SW PCB from the frame by pulling the size switch spring slightly inwards to the arrow 1 direction and remove the size SW PCB as shown in the figure below. Size switch spring Frame Taptite, cup S M3x6...
  • Page 194 3.28 Fan Motor 60 (1) Remove the two pan B M3x35 Taptite screws to remove the fan motor 60 from the frame. Frame Taptite, pan B M3x35 Fan motor 60 Fig. 4-129 4-77...
  • Page 195 CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY 3.29 Ejection Gear Unit Push the hooks of the main duct. Slide the main duct to the right, then remove it. Remove the shutter from the main duct. Main duct Main duct Hook Shutter Fig. 4-130 Remove the gear collar C, then remove the gear 18/60.
  • Page 196 LUBRICATION Fig.4-132...
  • Page 197 CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY [ 2 ] Pinch roller TR Collar Paper feed roller bearing Pinch roller TR Paper feed roller bearing Collar Fig.4-133 [ 3 ] Foam holder A4 ASSY Foam holder A4 ASSY Collar Paper feed roller bearing Paper feed roller bearing Collar Stopper spring...
  • Page 198 [ 4 ] Feeding gear unit NOTE: When you insert each gear to each shaft, be sure to insert in rotating the gear 90 degrees or more so that grease may be spread. Feeding gear plate ASSY (4 pcs.) Gear 31 Feeding motor ASSY (4 pcs.) (4 pcs.)
  • Page 199 CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY [ 5 ] Ejection gear unit NOTE: When you insert each gear to each shaft, be sure to insert in rotating the gear 90 degrees or more so that grease may be spread. (3 pcs.) Gear 21 (2 pcs.) H/R drive gear 21...
  • Page 200 [ 6 ] Main gear unit NOTE: When you insert each gear to each shaft, be sure to insert in rotating the gear 90 degrees or more so that grease may be spread. Gear 45/83 Gear 42 Gear 130/25 Main gear plate ASSY Electromagnetic develop clutch Gear 41/98 Gear 21 main...
  • Page 201 CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY PACKING Styrofoam ASSY Accessory bag AC cord Styrofoam ASSY Swing paper tray holder Printer Spacer MP Drum Unit Assembly (Drum unit with Toner Cartridge) Tray hold pad Styrofoam ASSY Carton Fig. 4-138 4-84...

  • Page 202: Chapter 5 Periodic Maintenance

    HL-7050 SERVICE MANUAL CHAPTER 5 PERIODIC MAINTENANCE To avoid creating secondary problems by mishandling, follow the warnings below during maintenance work. WARNING (1) Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer.
  • Page 203 CHAPTER 5 PERIODIC MAINTENANCE <Replacement Procedure> (1) Open the top cover of the printer. (2) Pull out the drum unit assembly (drum unit with the toner cartridge). (Fig.5-1) Fig. 5-1 CAUTION: It is recommended to place the drum unit assembly on a piece of disposable paper or cloth in case you accidentally spill or scatter toner.
  • Page 204 HL-7050 SERVICE MANUAL CAUTION: For best performance, use only genuine Brother toner. The product should only be used in a clean, dust-free environment with adequate ventilation.. Only unpack a drum unit immediately before you need to install it into the printer. If an unpacked drum unit is subjected to excessive direct sunlight or room light, the unit may be damaged.
  • Page 205 CHAPTER 5 PERIODIC MAINTENANCE <Replacement Procedure> (1) Open the top cover of the printer. (2) Push down the blue lock lever and take out the Toner Cartridge. (Fig.5-4) Fig. 5-4 CAUTION: It is recommended to place the toner cartridge on a piece of disposable paper or cloth in case you accidentally spill or scatter toner.
  • Page 206 It may also cause serious damage to the performance and life of a genuine Brother drum unit. Warranty cover is not applied to problems caused by the use of 3rd party toner or toner cartridges.
  • Page 207 CHAPTER 5 PERIODIC MAINTENANCE PERIODICAL REPLACEMENT PARTS Periodical replacement parts are the parts to be replaced periodically to maintain product quality. These parts would affect the product quality greatly if they lost their function even if they do not appear to be damaged or there is no change in their appearance.) The periodical replacement parts listed below should be replaced at the service center referring to the service life.
  • Page 208 HL-7050 SERVICE MANUAL PERIODICAL CLEANING Clean the following parts periodically to avoid any printer problems or print image defects. CAUTION: While printer exterior and interior cleaning basically can be implemented by the end user, the electrical terminals inside the printer and on the drum unit should be cleaned by a service technician.
  • Page 209 CHAPTER 5 PERIODIC MAINTENANCE Cleaning the Printer Interior When replacing the toner cartridge with a new one, be sure to clean the scanner window. Turn off the power switch and unplug the power cord. Remove the toner cartridge. Wipe off toner and paper dust from the metal plate in the printer with a dry, soft cloth. Metal plate Fig.
  • Page 210 HL-7050 SERVICE MANUAL MTBF / MTTR The meantime between failure (MTBF) and the meantime to repair (MTTR) for this printer are as follows:- MTBF: Up to 4,000 hours MTTR: Average 30 minutes...

  • Page 211: Chapter 6 Troubleshooting

    HL-7050 SERVICE MANUAL CHAPTER 6 TROUBLESHOOTING INTRODUCTION Initial Check (1). Operating environment Check if: The source voltage stays within ±10% from the rated voltage shown on the rating plate. The printer is installed on a solid, level surface. The room temperature is maintained between 10°C and 32.5°C. The relative humidity is maintained between 20% and 80%.
  • Page 212 CHAPTER 6 TROUBLESHOOTING (4). Others Condensation: When the printer is moved from a cold room into a warm room in cold weather, condensation may occur inside the printer, causing various problems as listed below: Condensation on the optical surfaces such as the scanning mirror, lenses, the reflection mirror and the protection glass may cause the print image to be light.
  • Page 214 CHAPTER 6 TROUBLESHOOTING OPERATOR CALLS & SERVICE CALLS Operator Call Messages An ‘operator call’ which the printer indicates on the LCD display is user recoverable. Identify the error from the table below and take the corrective action described for each indication to correct it.
  • Page 215 HL-7050 SERVICE MANUAL Put the Duplex unit on the printer properly. See the User’s Guide for NO DX UNIT the Duplex unit. Move the Duplex lever to the correct position. DX LEVER ERROR Change the job properties or install the Mailbox unit correctly.
  • Page 216 CHAPTER 6 TROUBLESHOOTING Add more memory. DOWNLOAD FULL Add more memory. FONT FULL Add more memory. MEMORY FULL Add more memory. IGNORE DATA The accessory you added was not installed properly. ACCESSORY ERROR Your Duplex unit is not a DX-7000. Change to a DX-7000. Your Lower OPTION MISMATCH tray is not an LT-7000.
  • Page 217 HL-7050 SERVICE MANUAL Service Call Messages When each of the following messages appears alternately on the LCD, a user unrecoverable error may have occurred. Instruct the user to turn off the power switch, wait a few seconds and then turn it on again. If the error is not cleared and the same service call appears, identify the error from the table on the next page and take the corrective action described for each indication to correct it.

  • Page 218: Error Messages

    CHAPTER 6 TROUBLESHOOTING Holding down the – switch and the Set switch at the same time while the error messages display will cause the type of the error appears on the LCD display. Error Messages Meaning Remedy ERROR S01 FATAL ERROR EX Turn off the printer.
  • Page 219 HL-7050 SERVICE MANUAL Error Messages Meaning Remedy ERROR E41 Error in communication Turn off the printer. Wait a few seconds, with the engine controller then turn it on again. Refer to M-12 ‘Engine interface error’ in this chapter. ERROR E49 Malfunction of fuser Turn off the printer.
  • Page 220 CHAPTER 6 TROUBLESHOOTING ERROR H60 Bus error Turn off the printer. Wait a few seconds, and then turn it on again. ERROR H61 Program ROM checksum Turn off the printer. Wait a few seconds, error and then turn it on again. ERROR H63 D-RAM error Turn off the printer.
  • Page 221 HL-7050 SERVICE MANUAL PAPER PROBLEMS When any paper related problem occurs, ensure that the paper used meets the recommended paper specifications referring to subsection 3.6 ‘Paper’ in CHAPTER Paper Loading Problems Problem Remedy The printer does not (1) Check that paper in the paper cassette is straight. If it is load paper.
  • Page 222 CHAPTER 6 TROUBLESHOOTING Paper Jams If paper jams in the printer, it will stop printing and display the following messages on the LCD display. Paper jam in the upper paper tray JAM A2 – A5 (Tray1) or lower tray (Tray 2/3/4) Paper jam in the multi-purpose tray JAM A1 Paper jam inside the printer...
  • Page 223 HL-7050 SERVICE MANUAL JAM A2 – A5 JAM C Tray 1 Tray 2 Tray 3 Tray 4 JAM D JAM A1 JAM E JAM B Fig. 6-1 6-13...
  • Page 224 CHAPTER 6 TROUBLESHOOTING 3.2.1 Clearing jammed paper Clear the jammed paper following the procedures below; JAM XXXX XXXX indicates the tray number that contains jammed paper; Tray A2, Tray A3, Tray A4 or Tray A5. NOTE: The paper trays and LCD panel descriptions in this manual are named as shown below. Upper paper tray: Tray A2 Optional lower tray: Tray A3, Tray A4 or Tray A5 (1).
  • Page 225 HL-7050 SERVICE MANUAL Caution Do not pull out the upper paper tray while paper is feeding from a lower paper tray because this will cause a paper jam. JAM A1 (1). Remove the paper from the multi-purpose tray. (2). Fan the paper stack, then put it back in the multi-purpose tray.
  • Page 226 CHAPTER 6 TROUBLESHOOTING (3). Use both hands to slowly pull out the jammed paper from inside the printer. Fig. 6-5 (4). Push down the blue lock lever of the drum unit assembly and take the toner cartridge out of the drum unit assembly.
  • Page 227 HL-7050 SERVICE MANUAL JAM REAR (at paper exit/in the face-up output tray) (1). Use both hands to slowly pull the jammed paper from the paper exit. Fig. 6-9 Note If a Duplex unit is on the printer, take it off the printer. After you pull out the jammed paper, put the Duplex unit back on the printer.
  • Page 228 CHAPTER 6 TROUBLESHOOTING (3). Use both hands to slowly pull out the jammed paper. Fig. 6-11 (4). Close the face-up output tray. (5). Open the top cover of the printer, and then close it to resume printing. 6-18...
  • Page 229 HL-7050 SERVICE MANUAL JAM DUPLEX (1). Use both hands to slowly pull the jammed paper from the paper exit of the Duplex unit. Fig. 6-12 (2). Use both hands to gently open the Duplex unit cover. (3). Use both hands to pull the Duplex unit out of the printer.
  • Page 230 CHAPTER 6 TROUBLESHOOTING CAUTION: When you pull out the Duplex uniy, be sure to hold it firmly with both hands (the shaded part in the illustration is heavier). Fig. 6-14 (4). Pull out the jammed paper from inside the Duplex unit. Fig.
  • Page 231 HL-7050 SERVICE MANUAL JAM MAILBOX (1). Open the back cover of the Mailbox unit. Fig. 6-17 (2). Pull out the jammed paper. Fig. 6-18 (3). Close the back cover of the mailbox. (4). Open the top cover of the printer, and then close it to restart printing.
  • Page 232 CHAPTER 6 TROUBLESHOOTING 3.2.2 Countermeasures for paper jams If the printer still displays the message on the LCD display even after the jammed paper is removed, take the appropriate countermeasures referring to the table below; Message Cause Remedy JAM A2 – A5 The paper feed roller ASSY 45 Replace the paper feed roller and the separation pad ASSY...
  • Page 233 HL-7050 SERVICE MANUAL Paper Feeding Problems Even if the paper is printed and ejected without any problems such as paper jams, paper- feeding problems below may appear. Users can clear these problems by following the ‘User Check’ items for each problem. Even if the same problem occurs again, follow the procedures in the table below.
  • Page 234 CHAPTER 6 TROUBLESHOOTING Page skew User Check (1) Check that the paper or other media is loaded into the paper tray correctly and that the paper guides are not too tight or too loose against the paper stack. (2) If using the manual feed slot, check how to load paper into the manual feed slot correctly. (3) The paper cassette may be too full.
  • Page 235 HL-7050 SERVICE MANUAL SOFTWARE SETTING PROBLEMS The printer may not print the data correctly if there are incorrect software settings. “There was an error writing to LPT1: (or BRUSB) for the printer” error message appears. User Check (1) Check that the printer cable is not damaged or broken. Check also that the cable is connected to the correct interface connectors of both the printer and PC.
  • Page 236 CHAPTER 6 TROUBLESHOOTING Unable to print from application software with the serial interface. User Check Check that the serial interface settings are correctly set up with the panel switches. Possible cause Step Check Result Remedy Failure inside Is it possible to print the test Identify the error type, then the printer page with the method of...
  • Page 237 HL-7050 SERVICE MANUAL Although the USB driver is installed, it is unable to find the BRUSB: port. User Check (1) Re-install the USB driver by following the steps below; i) Double-click the file “DeinsUSB.exe” in the USB directory of the CD-ROM or the floppy disk.
  • Page 238 CHAPTER 6 TROUBLESHOOTING MALFUNCTIONS When taking countermeasures for malfunctions as described in this section, check connectors for contact failure before measuring the voltage at the specified connector pins. No AC power supplied Possible cause Step Check Result Remedy Supply voltage Is the correct voltage present Inform the user that the correct at the outlet?
  • Page 239 HL-7050 SERVICE MANUAL WARNING If you analyze malfunctions with the power plug inserted into the power outlet, special caution should be exercised even if the power switch is OFF because it is a single pole switch. Main motor does not rotate...
  • Page 240 CHAPTER 6 TROUBLESHOOTING Insufficient output from high-voltage power supply unit Possible cause Step Check Result Remedy High-voltage Do any of the terminals on the Clean the terminals. contact high-voltage contacts have dirt or contact burns? High-voltage Check the connections of the Replace the high-voltage power supply connector between the high-...
  • Page 241 HL-7050 SERVICE MANUAL Scanner failure Possible cause Step Check Result Remedy Harness Is the connection of the Reconnect the connector connection scanner motor connector securely. failure CN21 on the engine PCB secure? Power supply Is the voltage between pins 5...
  • Page 242 5.5 ‘Control Panel Setting Menu’ in CHAPTER Software bug Does this problem appear Inform the Brother office of the when printing specific data or used specific data, printer printing under a specific condition and system environment? environment.
  • Page 243 HL-7050 SERVICE MANUAL M-13 PCI BUS error Possible cause Step Check Result Remedy Harness Is the connection between Reconnect the connectors connection connector CN10 on the main securely. failure PCB and connector P1 on the network board secure? Network board Does replacing the network Replace the network board.

  • Page 244: Image Defects

    CHAPTER 6 TROUBLESHOOTING IMAGE DEFECTS Image Defect Examples I-5 Dirt on back of paper I-1 Light I-2 Dark I-2 Dark I-3 Completely blank I-4 All black I-6 Black vertical I-6 Black vertical I-7 Black horizontal I-8 Black vertical I-9 White vertical streaks streaks stripes...
  • Page 245 HL-7050 SERVICE MANUAL Troubleshooting Image Defect Several types of the image defects can be cleared by end users. For those defects, instruct the user to check the ‘User Check’ items described in each table. Even if the same image defect appears, the following procedures should be followed in the event of specific image defects.
  • Page 246 CHAPTER 6 TROUBLESHOOTING Dark User Check (1) Check the paper used meets the recommended paper specifications. (2) Check the printer’s environment. High temperature and high humidity conditions can increase the amount of background shading. (3) Clean the corona wire with the wire cleaner. (4) Try installing a new toner cartridge or drum unit.
  • Page 247 HL-7050 SERVICE MANUAL Completely blank Ground Possible cause Step Check Result Remedy contacts Developing bias Are the developing bias Clean the electrodes contact failure contacts between the printer at both sides. body and drum unit dirty? Drum unit Are the drum shaft and drum...
  • Page 248 CHAPTER 6 TROUBLESHOOTING All black User Check (1) Clean the corona wire of the drum unit. (2) The drum unit may be damaged. Install a new drum unit. Ground Possible cause Step Check Result Remedy contacts Corona failure Is the corona wire dirty? Clean the corona wire with the wire cleaner.
  • Page 249 HL-7050 SERVICE MANUAL Dirt on the back of paper Possible cause Step Check Result Remedy Clean the pressure roller Fixing unit dirty Is the pressure roller dirty? referring to the following Is any other area in the printer procedure. dirty?
  • Page 250 CHAPTER 6 TROUBLESHOOTING Black and blurred vertical streaks User Check (1) Clean the corona wire in the drum unit. (2) Check that the corona wire cleaner is at the home position. (3) Check that the toner cartridge is not empty. (4) The drum unit may be damaged.
  • Page 251 HL-7050 SERVICE MANUAL Black and blurred horizontal stripes User Check (1) The drum unit may be damaged. Install a new drum unit. (2) Check the paper used meets the recommended paper specifications. (3) Clean the printer interior and the corona wire in the drum unit.
  • Page 252 CHAPTER 6 TROUBLESHOOTING White vertical streaks User Check (1) Try to wipe the scanner window with a soft cloth. (2) The toner cartridge may be damaged. Install a new toner cartridge. (3) Check the printer’s environment. High temperature and high humidity conditions can cause this problem.
  • Page 253 HL-7050 SERVICE MANUAL I-11 Faulty registration Possible cause Step Check Result Remedy Excessive paper Is the paper loaded in the Instruct the user to keep paper load paper cassette more than loads below 27mm in depth. 27mm high? Print paper...
  • Page 254 CHAPTER 6 TROUBLESHOOTING I-13 Image distortion Possible cause Step Check Result Remedy Laser unit Is the laser unit secured to the Secure the unit correctly and installation frame incorrectly? tighten the screws. (Check if there is any play.) Scanner LD Is the laser diode or the Replace the laser unit.
  • Page 255 HL-7050 SERVICE MANUAL I-15 White spots User Check (1) If the problem is not solved after printing a few pages, the drum unit may have glue from label stock on the photosensitive drum surface. Refer to Step 1 in the...
  • Page 256 CHAPTER 6 TROUBLESHOOTING (2) Turn the drum gear by hand while looking at the surface of the photosensitive drum. Be sure to turn the drum gear in the direction of an arrow. Photosensitive drum Fig. 6-21 (3) Wipe the surface of the photosensitive drum with a cotton swab until the dust or paper powder on the surface comes off.
  • Page 257 HL-7050 SERVICE MANUAL I-16 Black spots User Check (1) If the problem is not solved after printing a few pages, the drum unit may have glue from label stock on the photosensitive drum surface. Refer to Step 1 in the...
  • Page 258 CHAPTER 6 TROUBLESHOOTING I-17 Black band Ground Possible cause Step Check Result Remedy contacts Corona failure Is the wire cleaner at its home Return the wire cleaner position? to its home position. Corona failure Is the corona wire dirty? 1) Clean the corona wire.
  • Page 259 HL-7050 SERVICE MANUAL I-18 Gray background Possible cause Step Check Result Remedy Print paper Does the paper being used Recommend to use the meet the paper specification specified types of paper. (weight, etc.). Recommend to change to freshly unpacked paper.
  • Page 260 CHAPTER 6 TROUBLESHOOTING I-19 Hollow print User Check (1) Check the paper used meets the recommended paper specifications. (2) Select the ‘Thick paper mode’ in the printer driver, or use thinner paper than you are currently using. (3) Check the printer’s environment, conditions such as high humidity may cause this situation to occur.
  • Page 261 HL-7050 SERVICE MANUAL I-20 Downward fogging of solid black Possible cause Step Check Result Remedy Toner cartridge Is the problem solved after Replace the toner cartridge. failure replacing the toner cartridge? High-voltage Is the problem solved after Replace the high-voltage power...
  • Page 262 CHAPTER 6 TROUBLESHOOTING I-22 Light rain Ground Remedy Possible cause Step Check Result contact Drum unit failure Is the problem solved after Replace the drum replacing the drum unit? unit. Drum Is the contact between the Clean contact connection drum unit and printer body electrode both on the failure connected correctly?
  • Page 263 HL-7050 SERVICE MANUAL I-24 Toner specks User Check (1) Check the paper used meets the recommended paper specifications. A rough surfaced paper may cause the problem. (2) The toner cartridge may be damaged. Install a new toner cartridge. (3) The drum unit may be damaged, or may be nearly at the end of life. Install a new drum unit.

  • Page 264: Location Of Grounding Contacts

    CHAPTER 6 TROUBLESHOOTING Location of Grounding Contacts 6.3.1 Drum unit (2) Wire cleaner Toner cartridge (5) Grid (4) Development roller (3) Charge (1) Photosensitive drum (8) Cleaner (6) Transfer roller (8) Cleaner Fig. 6-23 6.3.2 Printer body & Paper tray (6) Development roller (5) Grid (3) Charge...

  • Page 265: Incorrect Printout

    HL-7050 SERVICE MANUAL INCORRECT PRINTOUT When the data is not printed correctly as it is seen on the PC screen, follow the procedures below in the event of a specific error. The printer prints unexpectedly or it prints garbage. User Check (1) Check if the printer cable is not too long.
  • Page 266 CHAPTER 6 TROUBLESHOOTING Unable to print full pages of a document with the “PRINT OVERRUN” message. User Check (1) Press the panel button to print the data remaining in the printer. (2) If this does not clear the error, reduce the complexity of your document or reduce the printer resolution.
  • Page 267 HL-7050 SERVICE MANUAL Headers or footers are not printed out even though they are viewed on PC screen. User Check Most laser printers have a restricted area that cannot be printed on. Usually the first two lines and last two lines of text cannot print (leaving 62 printable lines). Adjust the top and bottom margins in your document to allow for this.
  • Page 268 INFORMATION, and select the name of the print server (make sure that you have entered the print server name). If you can see Print Server Status and Control in the menu, then the Brother print server is visible to the network, proceed to subsection 8.11 ‘Novell NetWare Troubleshooting’.
  • Page 269 (a process known as filtering); therefore, such a bridge must be configured to allow Brother print server addresses. Likewise, a router can be set up to pass only certain protocols, so be sure that the desired protocol can be passed through to the print server.
  • Page 270 CHAPTER 6 TROUBLESHOOTING TCP/IP Troubleshooting If you are using TCP/IP and cannot print to the print server and you have checked the hardware and network as described in the previous steps, then check the following: NOTE: It is always a good idea to try the following in order to eliminate the possibility of setup errors. Turn off the printer and then on again, Delete and recreate the print server and create a new print queue in order to eliminate the possibility of setup errors.
  • Page 271 (11) If you cannot print from DEC TCP/IP Service for VMS (UCX), make sure that you have version 2.0B or later of this software, because earlier versions will not work with Brother print servers.
  • Page 272 If you are having trouble printing on a Windows 95/98/Me/NT 4.0/2000/XP Peer to Peer network (NetBIOS), check the following: (1) Make sure that the Brother NetBIOS Port driver is securely installed and configured according to the Windows 95/98/Me/NT 4.0/2000/XP Peer to Peer (NetBIOS) chapters.
  • Page 273 If you cannot print from NetWare and you have checked the hardware and network as described in the previous steps, first verify that the Brother print server is attached to the server queue by going to PCONSOLE, selecting PRINT QUEUE INFORMATION, and then CURRENTLY ATTACHED SERVERS.
  • Page 274 CHAPTER 6 TROUBLESHOOTING 8.12 AppleTalk Troubleshooting If you cannot print from an AppleTalk for Macintosh computer and you have checked the hardware and network as described in the previous steps, then check the following: (1) Make sure that you are running Phase 2 AppleTalk and that you have selected the correct network interface from the Network Control Panel on the Macintosh.
  • Page 275 HL-7050 SERVICE MANUAL (1) If the queue pauses when you try to print, check that the print server node name and port name (or service name) agree with the names defined for the VMS print queue in LARCP or for ULTRIX print queue in the /etc/printcap file (ts parameter) and lcp –s command. The names MUST EXACTLY agree in order for printing to work.
  • Page 276 CHAPTER 6 TROUBLESHOOTING 8.16 Banyan VINES Troubleshooting If you are having trouble printing with Banyan VINES, check the following: (1) Make sure that you have the Banyan VINES PCPrint software option installed. (2) Make sure that the Banyan protocol is enabled. (3) If there are more than two hops (i.e., more than two routers) between the print server and the file server, make sure that you have changed the hop count to the appropriate number via BRAdmin or the print server console.
  • Page 277 HL-7050 SERVICE MANUAL INSPECTION MODE Before the Operation Before operating the inspection mode, do the followings: (1) Confirm that CompactFlash card is installed into the printer. (2) Confirm that the optional lower tray, the mailbox and the duplex unit are installed into the printer if the optional unit connection test is performed.
  • Page 278 CHAPTER 6 TROUBLESHOOTING Press the Set switch to check if all the LEDs go out. Press all the 7 control panel switches one by one to check if the character and the backlight color will display respectively as the table shows below: Switch Character Backlight color...
  • Page 279 HL-7050 SERVICE MANUAL Check the DENGEN fan rotate at the full speed. FAN CHECK DENGEN FAN (8) Check fan (2) Press the Set switch. The DENGEN fan stops its rotation. Check the OZONE fan rotate at the full speed. FAN CHECK...
  • Page 280 CHAPTER 6 TROUBLESHOOTING (11) Check reading / writing on CompackFlash card Press the Set switch. CARD1 R/W START Checks reading/writing on Card 1 ID. The flash card works correctly. CARD1 R/W OK CARD1 R/W ERROR There is a problem in reading/writing from the flash memory card 1.
  • Page 281 HL-7050 SERVICE MANUAL CHAPTER 7 HIDDEN FUNCTIONS ENTERING HIDDEN FUNCTION MENU MODES HL-7050 has 3 entrances into the hidden function menu; 1. Power on. Press the Go switch and the Set switch (Professional Menu mode). section 2. ‘PROFESSIONAL MENU MODE’ in this chapter.
  • Page 282 CHAPTER 7 HIDDEN FUNCTIONS PROFESSIONAL MENU MODE The Professional Menu mode enables to customize various functions for specific users and may be opened to users if necessary. Enabling and Disabling Professional Menu Mode Entering the Professional Menu Mode Turn the machine on. Press the Go switch and Set switch together to enter the Professional Menu mode.
  • Page 283 HL-7050 SERVICE MANUAL Function Table The following printer settings and function will be available with this operation. Title & Subtitle Item to be Set Description TRAY SETTING MANUAL FEED PAPER IN=CONT* Feeds paper automatically when printing using the manual feed function.
  • Page 284 CHAPTER 7 HIDDEN FUNCTIONS Title & Subtitle Item to be Set Description READOUT SELECT READOUT=ON* When receiving DC3 in FX emulation, ignores the data received before DC1. READOUT=OFF Not ignore the data even DC3 is received. FONT SELECT SCALABLE FONT FONT=ALL* Enables all scalable fonts when selecting PCL font setting.
  • Page 285 HL-7050 SERVICE MANUAL Title & Subtitle Item to be Set Description FONT SELECT 300DPI PRIORITY 3B PRIO=LOW* The priority of selection for 300dpi bitmap fonts is standard (=low). 3B PRIO=HIGH The priority of selection for 300dpi bitmap fonts is higher than scalable font.
  • Page 286 CHAPTER 7 HIDDEN FUNCTIONS Title & Subtitle Item to be Set Description RS-232C MENU DSR(DR) ON/OFF DSR(DR)=OFF* Not check DSR (DR) signal when a printer send back data to a host through RS-232C. This is chosen by default. DSR(DR)=ON Check DSR (DR) signal when a printer send back data to a host through RS-232C.
  • Page 287 HL-7050 SERVICE MANUAL Title & Subtitle Item to be Set Description PS QUOTE BINARY PS QUOTEBIN=OFF* Not accept the binary data even with special codes. BS QUOTEBIN=ON Accepts the binary data with special codes. PS IMAGE MASK PS IMAGEMSK=OFF* ON: Makes print speed faster with an OS/2 driver.
  • Page 288 CHAPTER 7 HIDDEN FUNCTIONS PSCOPYPAGE PSCOPYPAGE=L3* L2: Changes the PS copypage operator from Level3 to Level2. PSCOPYPAGE=L2 1JOB1PAGE SEL 1 JOB1PAGE=SX* Duplex=ON makes the printing speed of 1 page of data faster. 1 JOB1PAGE=DX Sets up the printing mode. (Simplex/Duplex) APPLEUSBPS BINARY=OFF Enables to print PS Pure Binary...
  • Page 289 HL-7050 SERVICE MANUAL SERVICE MENU MODE By enabling the Service Menu mode provides, you will get various printer information. This mode is not open to users. Entering the Service Menu Mode Turn the machine on. While holding down the Go switch, press the + switch once and then the Set switch until the menu “-- SERVICE MENU --“...
  • Page 290 CHAPTER 7 HIDDEN FUNCTIONS Title Subtitle Description PRINT PAGES Displays the number of pages when printing each paper size. A4/LTR PAGE PRINT PAGES counter will be effective until it LEGAL PAGE counts up to 100,000 pages for each paper B5/EXE PAGE size.
  • Page 291 HL-7050 SERVICE MANUAL MODIFY COUNT JAM COUNT Displays the number of paper jam occurrence. DEVELOPER Displays the number of the Developer turning. REPLACE COUNT TONER Displays the number of the toner cartridge replacement. DRUM UNIT Displays the number of the drum unit replacement.
  • Page 292 CHAPTER 7 HIDDEN FUNCTIONS TEMPER CONTROL CENTER TEMPER THICK PAPER Adjusts the toner fixing temperature for thick paper. (-15, -10, -5, 0, 5, 10, 15 or 20) PLAIN PAPER Adjusts the toner fixing temperature for plain paper. (-15, -10, -5, 0, 5, 10, 15 or 20) TRANSPARENCIES Adjusts the toner fixing temperature for transparencies.
  • Page 293 HL-7050 SERVICE MANUAL OTHER HIDDEN FUNCTION MENUS Hidden Function Menus Enabled by Pressing Switch(es) When Turning the Machine on The following settings and function will be available by holding down the specified switch(es) while turning the machine on. Switch(es) Display...
  • Page 294 CHAPTER 7 HIDDEN FUNCTIONS Parts Life Reset Function This function is used by service specialists only when changing the periodical replacement parts to clear the life counter. To operate this function, press the “Go” and “+” switches together until the menu “RESET PARTS LIFE”...
  • Page 295 APPENDIX 1. CONNECTION DIAGRAM, HL-7050 A - 1...
  • Page 296 APPENDIX 2. MAIN PCB CIRCUIT DIAGRAM, HL-7050 (1/9)
  • Page 297 APPENDIX 3. MAIN PCB CIRCUIT DIAGRAM, HL-7050 (2/9)
  • Page 298 APPENDIX 4. MAIN PCB CIRCUIT DIAGRAM, HL-7050 (3/9)
  • Page 299 APPENDIX 5. MAIN PCB CIRCUIT DIAGRAM, HL-7050 (4/9) CODE LJ9004001 NAME B512149 CIR (4/9) A - 5...
  • Page 300 APPENDIX 6. MAIN PCB CIRCUIT DIAGRAM, HL-7050 (5/9) CODE LJ9004001 NAME B512149 CIR (5/9) A - 6...
  • Page 301 APPENDIX 7. MAIN PCB CIRCUIT DIAGRAM, HL-7050 (6/9) CODE LJ9004001 NAME B512149 CIR (6/9) A - 7...
  • Page 310 < ID for year > 2002 2003 < ID for factory > Kariya Plant Mie Brother BIUK Buji Nan Ling Factory (1) Printer: Printed on the label attached on the rear of the main body <MODEL NO.> < SERIAL NO. >...
  • Page 311 HL-7050 SERVICE MANUAL (3) Drum (Consumable) : Packed in black plastic bag. J 0 9 5 X X X X MONTH SERIAL NO. YEAR 5= DR. FACTORY ID (printed on the label attached on the drum) (4) Drum unit with toner cartridge (Attachment) : Sealed up in aluminum bag.
  • Page 312 APPENDIX APPENDIX 17. DIAMETER / CIRCUMFERENCE OF ROLLERS The diameter and circumference of each roller are listed below; Parts Name Diameter (Circumference) First Paper Feed Roller 13.8 mm (43.3 mm) Paper Feed Roller 14.0 mm (44.0 mm) Transfer Roller 17.7 mm (55.6 mm) Photosensitive Drum 29.97 mm (94.1 mm) Heat Roller...
  • Page 313 HL-7050 SERVICE MANUAL APPENDIX 18. PRINT SPEEDS WITH VARIOUS SETTINGS Print speed of the HL-7050 printers is up to 28 ppm when loading A4 or Letter size paper from the regular paper cassette in the Regular mode. Actual print speed varies depending on the paper type, paper size, print method (output tray type) as shown in the tables below;...
  • Page 314 APPENDIX (3) Print speeds (ppm) when using the optional duplex unit (DX-7000); Paper type Legal Letter Executive Envelope A4Long Transparency Regular Thick paper Thicker paper Bond paper Envelope Thin paper (4) Print speeds (ppm) when using the optional mail box (MX-7000); Paper type Legal Letter...
  • Page 315 HL-7050 SERVICE MANUAL APPENDIX 19. HOW TO KNOW PAGE COUNTER & PARTS LIFE If you want to know the number of printed pages and the parts remaining life, you should either enter the Service Menu mode or print out the Print Configuration page. For more information about the Service Menu mode, see section 3 ‘SERVICE MENU MODE’...
  • Page 316 APPENDIX Page counter is printed here. This not printed in some countries. Fig. A- 2 A-22...
  • Page 317 HL-7050 SERVICE MANUAL APPENDIX 20. HOW TO USE THE SELF-DIAGNOSTICS TOOLS There are three self-diagnostics tools, which are automatically installed when the printer driver is installed: - 1) Troubleshooting for Printer won’t print 2) Diagnostics 3) Printer Information The following sections describe the details on each tool.
  • Page 318 APPENDIX Diagnostics This tool helps you to report your PC environment to investigate the cause of problem such as ‘Printer won’t print’ or ‘Printer prints garbage or incorrect fonts’. Before using this tool, however, you have to check if you can clear the problem using the ‘Troubleshooting for printer won’t print’...
  • Page 319 HL-7050 SERVICE MANUAL (3) If you click the OK button in Step 2, the dialog box below appears. Fig. A-6 (4) Check the result that the printer reported and click the A, B or C button depending on the result.
  • Page 320 APPENDIX Printer Information The drum unit life or page counter is printed on Print Configuration in some countries as described in APPENDIX 18 ‘HOW TO KNOW PAGE COUNTER & PARTS LIFE’. This tool also shows the printer information such as printer version or page counter for all models only when the printer is connected to a parallel port.
  • Page 321 HL-7050 SERVICE MANUAL APPENDIX 21. NVRAM DEFAULT VALUE The default values for the main items to be set in NVRAM are as follows; Items Descriptions Development switching The developing bias is switched from 400V to 300V when 5,000 timing pages are printed.
  • Page 322 APPENDIX APPENDIX 22. PAPER TRAY INFORMATION (FOR EUROPE ONLY) The paper tray fitted to the printer is different from the service manual information for printers shipped to Europe as follows: (1) The paper tray supplied with the HL-7050 printer has a plastic rib on the paper tray cover as shown below;...
  • Page 323 Relatively poor wettability, rough surface (bumps are likely to be formed), and solder dragging Poor solder elevation Poor thermal conductivity and heat resistant (difficult to melt) 2. Metal composition & wire solder The metal composition of lead-free solder allowed for use on PCBs for Brother's products is following. Compositon Manufacturer Origin...
  • Page 324 APPENDIX Shrinkage cracks Figure 1 Shrinkage Cracks 4. Identification of lead-free solder on PCBs For PCBs that use lead-free solder, "LF" is indicated by silk-screen printing or attaching a label. "LF" stands for lead free and indicates that the PCBs bearing such an indication have been soldered with lead-free solder.
  • Page 325 HL-7050 SERVICE MANUAL 7) A localized ventilation system and gloves are required for soldering operations. Lead-free solder does not contain the toxic substance lead, however, inhalation of the fumes may adversely affect the health of workers. The silver contained in lead-free...
  • Page 326 APPENDIX APPENDIX 24. TONER CARTRIDGE WEIGHT INFORMATION Toner Cartridge Weight (approx weight) TN5500/TN700 Brand new Toner Cartridge Weight 1075g Toner Weight at Brand New Toner Cartridge 345±5g Toner Cartridge Weight at Toner Near Empty 865g Remain Toner Weight at Toner Near Empty 135g Toner Cartridge Weight at Toner Empty 850g...

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