Lexmark T644 Service Manual PDF

The Lexmark T644 is a high-performance monochrome laser printer designed for heavy-duty printing tasks. This service manual provides essential information for maintenance, troubleshooting, and repair of the Lexmark T644 printer. Below are key sections for features, installation, setup, operation, specifications, and troubleshooting.

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

Features at a Glance

Key components: High-speed printing, automatic duplexing, large paper capacity, and advanced security features.

Feature	Description
Print Speed	Up to 45 pages per minute
Duplex Printing	Automatic double-sided printing
Paper Capacity	Standard 250-sheet input tray, optional 550-sheet tray
Connectivity	USB, Ethernet, and optional wireless
Security Features	Secure printing and user authentication

Installation

Unpack and inspect contents. Place the printer on a stable surface.

Connect power cord: Plug into a suitable outlet.
Connect to network: Use Ethernet or USB cable.
Load paper: Adjust paper guides and load into the tray.

WARNING! Ensure printer is on a flat surface to avoid tipping.

First-Time Setup

Power on the printer; follow on-screen prompts.

Configure network settings: Use the control panel to connect to Wi-Fi or wired network.
Install printer drivers: Download and install from the Lexmark website.
Test print: Print a test page to confirm setup.

CAUTION! Ensure stable surface; avoid placing near heat sources.

Specifications

Print Technology: Monochrome laser.
Print Resolution: Up to 1200 x 1200 dpi.
Monthly Duty Cycle: Up to 150,000 pages.
Memory: 256 MB standard, expandable to 512 MB.
Connectivity: USB 2.0, Ethernet, optional wireless.
Dimensions: 15.4 x 17.6 x 12.5 inches.
Weight: Approximately 45 lbs.

Controls and Settings

Access settings via the control panel. Key buttons include Power, Cancel, and Menu.

Display: LCD screen for easy navigation of settings and status.

Connecting Devices

Connect the printer to a computer or network for printing.

Turn off the printer and devices before connecting.
Use the appropriate cable for connection (USB or Ethernet).
Power on the printer and configure settings as needed.

Tip: Ensure all connections are secure before powering on.

Printing Documents

Print documents from your computer or mobile device.

Select the document to print.
Choose the Lexmark T644 as the printer.
Adjust print settings as necessary.
Click Print to start the job.

WARNING! Ensure paper is loaded correctly to avoid jams.

Maintenance

Regular maintenance ensures optimal performance.

Clean printer exterior with a soft cloth.
Replace toner cartridges as needed.
Run maintenance routines via the control panel.

CAUTION! Always unplug the printer before performing internal maintenance.

Regulatory Information

This printer complies with FCC regulations and safety standards. For more information, visit the Lexmark website.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Printer not responding	Power issue	Check power connection and turn on the printer.
Paper jam	Incorrect paper loading	Remove jammed paper and reload correctly.
Print quality issues	Toner low or dirty	Replace toner cartridge or clean the printer.
Network issues	Connection problem	Check network settings and cables.

Reset: Use the control panel to reset settings if necessary.

Service: Contact Lexmark support for further assistance.