Brother MFC-9420CN Manual

The Brother MFC-9420CN is a color multifunction center featuring laser printing, copying, scanning, and faxing capabilities. It offers network connectivity, automatic document feeder, flatbed scanner, PC-FAX functionality, and supports various media types. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Printing & Copying 8. Scanning & Faxing 9. Maintenance & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Color laser engine, Automatic Document Feeder (ADF), Flatbed scanner, Control panel with LCD, Network interface, Phone line connectors, Paper trays.

FeatureDescription
Print SpeedUp to 20 ppm black, 4 ppm color
Print ResolutionUp to 600 x 600 dpi
Copy ResolutionUp to 600 x 600 dpi
Scan ResolutionUp to 600 x 1200 dpi
Fax Modem Speed33.6 kbps
Paper Capacity250 sheets standard
ADF CapacityUp to 35 sheets
InterfacesUSB 2.0, Ethernet 10/100Base-TX
Memory32 MB standard
Supported OSWindows, Mac OS

Installation

Unpack and inspect contents. Place on stable, level surface near power outlet.

  1. Remove all packaging materials and tape from inside and outside the unit.
  2. Install toner cartridges: Open front cover, remove protective materials, insert cartridges in correct slots (Black, Cyan, Magenta, Yellow).
  3. Load paper: Adjust paper guides in tray, load letter-size paper face down.
  4. Connect power cord to rear of unit and plug into AC outlet.
  5. Connect to computer: Use USB cable or connect Ethernet cable for network.
  6. For fax: Connect phone line to LINE port on rear.

WARNING! Toner cartridges are heavy; handle with care. Ensure unit is unplugged during installation.

First-Time Setup

Power on device; follow on-screen prompts on LCD display.

  1. Initial startup: Device will perform self-test and calibration (may take several minutes).
  2. Set language: Use control panel buttons to select preferred language.
  3. Set date/time: Enter current date and time for fax functions.
  4. Install drivers: Insert software CD or download from Brother website, follow installation wizard.
  5. Configure network: Use control panel menu to set IP address or use automatic DHCP.
  6. Print test page: Verify installation by printing configuration page from menu.

CAUTION! Do not turn off power during initial setup or calibration.

Specifications

Controls and Settings

Control Panel: LCD display, Navigation buttons, Start/Stop, Numeric keypad, Speed dial buttons, Function keys.

Main Functions: COPY, FAX, SCAN, MENU

Copy Settings: Number of copies, Darkness, Reduce/Enlarge, Paper select, 2-sided copying. Fax Settings: Resolution (Standard/Fine/Super Fine), Redial, Fax/Tel switch, ECM mode. Scan Settings: Resolution, File format (PDF, JPEG, TIFF), Destination (PC, Email, Network). System Settings: Network configuration, Security settings, Reports printing, Maintenance functions.

Connecting Devices

Computer: USB or Ethernet network. Telephone: Standard phone line to LINE port. Additional phone: Connect to EXT port for handset.

  1. Turn off device before making connections.
  2. For USB: Connect USB cable to computer and device USB port.
  3. For network: Connect Ethernet cable to router/switch and device network port.
  4. For fax: Connect phone line from wall jack to LINE port.
  5. Power on device and computer.

Tip: Use shielded cables for best performance and interference reduction.

Printing & Copying

Supports various paper types and sizes.

  1. Printing: Select printer driver from application, choose settings (color, quality, paper type).
  2. Copying: Place original in ADF or on glass, select copy settings on control panel, press Start.
  3. Multiple copies: Use numeric keypad to enter quantity (1-99).
  4. Enlarge/Reduce: Select percentage from 25% to 400%.
  5. 2-sided copying: Select 2-sided mode for duplex copies.
  6. Collate: Automatically collates multiple copy sets.
  7. Toner save mode: Reduces toner consumption for draft documents.

WARNING! Do not touch the fuser unit inside the printer; it becomes hot during operation.

Scanning & Faxing

Scanning: Place document in ADF or on glass, select scan function, choose destination and format. Faxing: Program speed dials, send fax using numeric keypad or from computer.

  1. Scan to PC: Requires Brother software installed on computer.
  2. Scan to email: Configure email settings in network menu.
  3. Scan to network folder: Set up network path and credentials.
  4. Send fax: Dial number manually or use speed dial, press Start.
  5. Receive fax: Set to auto answer or manual mode.
  6. PC-FAX: Send fax directly from computer using printer driver.
  7. Fax forwarding: Forward received faxes to another number.

Maintenance & Cleaning

Unplug before cleaning. Use dry, lint-free cloth for exterior. Clean interior with approved materials only.

  1. Clean glass and ADF: Use glass cleaner and soft cloth for scanner glass.
  2. Clean corona wire: Access through front cover, use cleaning tool provided.
  3. Replace toner: When toner low message appears, replace appropriate cartridge.
  4. Clean paper path: Remove paper dust and debris from rollers and guides.
  5. Update firmware: Check Brother website for latest firmware updates.

CAUTION! Do not use alcohol, ammonia, or abrasive cleaners on plastic surfaces.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Energy Star® compliant. Copyright © Brother Industries, Ltd. For support, visit www.brother.com or contact Brother Customer Service at 1-877-267-8437. All trademarks referenced are property of their respective owners.

Troubleshooting

SymptomPossible CauseCorrective Action
No powerPower cord/outletCheck power connections; try different outlet; ensure power switch is on.
Paper jamsPaper loading/rollersClear jammed paper following guide in manual; check paper condition.
Poor print qualityToner/roller/drumReplace low toner; clean corona wire; run cleaning cycle.
Not printing from computerDriver/connectionCheck cable connections; reinstall driver; verify printer is selected.
Fax not sending/receivingPhone line/ settingsCheck phone line connection; verify fax settings; test with known working line.
Scanner not workingSoftware/connectionReinstall scanning software; check USB/network connection.
Error messages on displayVarious issuesRefer to error code in manual; perform recommended reset procedure.

Reset: Menu > Initial Setup > Reset Settings to return to factory defaults.

Service: 1-877-267-8437; www.brother.com

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